Disabled external gits
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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 1,
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"metadata": {},
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"outputs": [],
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"source": [
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"import meshplot as mp\n",
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"import numpy as np\n",
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"import sys\n",
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"import matplotlib.pyplot as plt\n",
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"import json\n",
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"import math\n",
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"import igl\n",
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"from matplotlib import pyplot as plt\n",
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"sys.path.append(\"../src/\")"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# 1. Visualize Gradient"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"For a scalar value function $E$ using mesh vertices as variable (i.e, most of our energy function), \n",
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"\n",
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"we can visualize its gradient by drawing an arrow $\\frac{\\partial E}{\\partial \\boldsymbol{x}} $ at each of the mesh vertex $\\boldsymbol{x}$, which help debug your code."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"metadata": {},
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"outputs": [],
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"source": [
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"def draw_mesh_and_gradient(V, F, G):\n",
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" fig = plt.figure()\n",
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" plt.triplot(V[:, 0], V[:, 1], triangles = F)\n",
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" plt.quiver(V[:, 0], V[:, 1], G[:, 0], G[:, 1])\n",
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" plt.axis('equal')\n",
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" plt.ylim([min(V[:, 1]) - 0.5, max(V[:, 1]) + 0.5])\n",
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" plt.show() "
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## 1.1 Gradient of Mesh Area"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"metadata": {},
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"outputs": [],
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"source": [
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"from energies import compute_faces_area_gradient, vertex_cells_sum\n",
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"def compute_mesh_area_gradient(V, F):\n",
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" dAfx, dAfy = compute_faces_area_gradient(V, F)\n",
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" dAx = vertex_cells_sum(dAfx, F)\n",
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" dAy = vertex_cells_sum(dAfy, F)\n",
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" dA = np.column_stack([dAx, dAy])\n",
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" return dA"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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"metadata": {},
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"outputs": [
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{
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"data": {
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"image/png": 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truncated
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"text/plain": [
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"<Figure size 432x288 with 1 Axes>"
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]
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},
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"metadata": {
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"needs_background": "light"
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},
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"output_type": "display_data"
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}
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],
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"source": [
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"V = np.array([[0, 0, 0], [1, 0, 0], [0, 1, 0], [1, 1, 0]], dtype = float)\n",
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"F = np.array([[0, 1, 2], [1, 3, 2]])\n",
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"G = compute_mesh_area_gradient(V, F)\n",
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"draw_mesh_and_gradient(V, F, G)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 5,
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"metadata": {},
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"outputs": [
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{
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"data": {
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"image/png": 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truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"V = np.array([[0, 0, 0], [1, 0, 0], [0, 1, 0], [-1, 0, 0], [0, -1, 0]], dtype = float)\n",
|
||||
"F = np.array([[0, 1, 2], [0, 2, 3], [0, 3, 4], [0, 4, 1]])\n",
|
||||
"G = compute_mesh_area_gradient(V, F)\n",
|
||||
"draw_mesh_and_gradient(V, F, G)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"attachments": {
|
||||
"gradient_area_01.png": {
|
||||
"image/png": 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truncated
|
||||
},
|
||||
"gradient_area_02.png": {
|
||||
"image/png": "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 truncated
|
||||
}
|
||||
},
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Referenced image\n",
|
||||
"\n",
|
||||
""
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 1.2 Gradient of Equilibrium Energy"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 6,
|
||||
"metadata": {
|
||||
"scrolled": true
|
||||
},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": "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 truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"V = np.array([[0, 0, 0], [1, 0, 0], [0, 1, 0], [1, 1, 0]], dtype = float)\n",
|
||||
"F = np.array([[0, 1, 2], [1, 3, 2]])\n",
|
||||
"from energies import compute_equilibrium_energy_gradient\n",
|
||||
"G = compute_equilibrium_energy_gradient(V, F, 0.0)\n",
|
||||
"draw_mesh_and_gradient(V, F, G)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"attachments": {
|
||||
"gradient_equilibrium.png": {
|
||||
"image/png": "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 truncated
|
||||
}
|
||||
},
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Referenced image\n",
|
||||
""
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 1.3 Gradient of Shape Energy"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 20,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": "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 truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"V = np.array([[1, 1, 0], [2, 1, 0], [1, 2, 0], [2, 2, 0]], dtype = float)\n",
|
||||
"F = np.array([[0, 1, 2], [1, 3, 2]])\n",
|
||||
"E = igl.edges(F)\n",
|
||||
"from energies import compute_shape_energy_gradient\n",
|
||||
"G = compute_shape_energy_gradient(V, E, [0.0, 0.0, 0.0, 0.0, 0.0])\n",
|
||||
"draw_mesh_and_gradient(V, F, G)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"attachments": {
|
||||
"gradient_shape.png": {
|
||||
"image/png": 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|
||||
}
|
||||
},
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Referenced image\n",
|
||||
""
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 2. Analytical Gradient Compared with Finite Differences"
|
||||
]
|
||||
},
|
||||
{
|
||||
"attachments": {
|
||||
"errors.png": {
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"image/png": 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truncated
|
||||
}
|
||||
},
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Compare your hande written derivatives with the finite difference.\n",
|
||||
"\n",
|
||||
"Given a function $f(\\boldsymbol{x}), \\boldsymbol{x} \\in R^n$, because of the taylor expension, $f(\\boldsymbol{x} + \\boldsymbol{h}) = f(\\boldsymbol{x}) + \\nabla f(\\boldsymbol{x})^T\\boldsymbol{h} + o(\\vert \\vert \\boldsymbol{h} \\vert \\vert)$\n",
|
||||
"\n",
|
||||
"The finite difference at point $\\boldsymbol{x}$ with step $\\boldsymbol{h}$ is defined as $Df_h = f(\\boldsymbol{x} + \\boldsymbol{h}) - f(\\boldsymbol{x})$\n",
|
||||
"\n",
|
||||
"When $\\vert \\vert \\boldsymbol{h} \\vert \\vert \\rightarrow 0$, \n",
|
||||
"\n",
|
||||
"$$Err(f) = \\frac{Df_h - \\nabla f(\\boldsymbol{x})^T\\boldsymbol{h}}{\\vert \\vert \\boldsymbol{h} \\vert \\vert} \\rightarrow 0$$\n",
|
||||
"\n",
|
||||
"We can draw the error graph $Err(f)$ by gradually deceasing the size of $\\vert \\vert \\boldsymbol{h} \\vert \\vert$.\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"When $\\vert \\vert \\boldsymbol{h} \\vert \\vert \\leq 10^{-8}$, the percision of our computer is not enough to compute $Df_h$ correctly which causes the error grows significantly. All figures generated in this section should have this pattern (the absolute value does not matter), otherwise please check your derivatives."
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 8,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"V = np.array([[0, 0, 0], [1, 0, 0], [0, 1, 0], [1, 1, 0]], dtype = float)\n",
|
||||
"F = np.array([[0, 1, 2], [1, 3, 2]])\n",
|
||||
"E = igl.edges(F)\n",
|
||||
"deltaV = np.random.rand(V.shape[0], 2)\n",
|
||||
"deltaV /= np.linalg.norm(deltaV)\n",
|
||||
"scales = [math.pow(10, -x) for x in np.arange(3, 12.0, 0.01)]\n",
|
||||
"def plot_finite_difference_errors(errors):\n",
|
||||
" fig = plt.figure()\n",
|
||||
" ax = fig.gca()\n",
|
||||
" ax.set_yscale('log')\n",
|
||||
" ax.set_xscale('log')\n",
|
||||
" ax.plot(scales, errors)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 2.1 Mesh Area"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 9,
|
||||
"metadata": {
|
||||
"scrolled": true
|
||||
},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": "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 truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"from geometry import compute_mesh_area\n",
|
||||
"\n",
|
||||
"def compute_finite_difference_for_mesh_area(V, F, deltaV):\n",
|
||||
" V1 = V.copy()\n",
|
||||
" V1[:, 0 : 2] += deltaV\n",
|
||||
" finite_difference = compute_mesh_area(V1, F) - compute_mesh_area(V, F)\n",
|
||||
" return finite_difference\n",
|
||||
"\n",
|
||||
"gradient = compute_mesh_area_gradient(V, F)\n",
|
||||
"errors = []\n",
|
||||
"for scale in scales:\n",
|
||||
" finite_difference = compute_finite_difference_for_mesh_area(V, F, deltaV * scale)\n",
|
||||
" analytical = gradient * deltaV * scale\n",
|
||||
" errors.append(abs(finite_difference - np.sum(analytical)) / scale)\n",
|
||||
"plot_finite_difference_errors(errors)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 2.2 Equilibrium Energy"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 10,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": "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 truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"from energies import compute_equilibrium_energy\n",
|
||||
"from energies import compute_equilibrium_energy_gradient\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def compute_finite_difference_for_equilibrium_energy(V, F, x_csl, deltaV):\n",
|
||||
" V1 = V.copy()\n",
|
||||
" V1[:, 0 : 2] += deltaV\n",
|
||||
" return compute_equilibrium_energy(V1, F, x_csl) - compute_equilibrium_energy(V, F, x_csl)\n",
|
||||
"\n",
|
||||
"x_csl = 0\n",
|
||||
"gradient = compute_equilibrium_energy_gradient(V, F, x_csl)\n",
|
||||
"errors = []\n",
|
||||
"for scale in scales:\n",
|
||||
" finite_difference = compute_finite_difference_for_equilibrium_energy(V, F, x_csl, deltaV * scale)\n",
|
||||
" analytical = gradient * deltaV * scale\n",
|
||||
" errors.append(abs(finite_difference - np.sum(analytical)) / scale)\n",
|
||||
"plot_finite_difference_errors(errors)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 2.3 Shape Energy"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 11,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": 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truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"from energies import compute_shape_energy\n",
|
||||
"from energies import compute_shape_energy_gradient\n",
|
||||
"from energies import compute_edges_length\n",
|
||||
"\n",
|
||||
"def compute_finite_difference_for_shape_energy(V, E, l0, deltaV):\n",
|
||||
" V1 = V.copy()\n",
|
||||
" V1[:, 0 : 2] += deltaV\n",
|
||||
" return compute_shape_energy(V1, E, l0) - compute_shape_energy(V, E, l0)\n",
|
||||
"\n",
|
||||
"x_csl = 0\n",
|
||||
"l0 = [0, 0, 0, 0, 0]\n",
|
||||
"gradient = compute_shape_energy_gradient(V, E, l0)\n",
|
||||
"errors = []\n",
|
||||
"for scale in scales:\n",
|
||||
" finite_difference = compute_finite_difference_for_shape_energy(V, E, l0, deltaV * scale)\n",
|
||||
" analytical = gradient * deltaV * scale\n",
|
||||
" errors.append(abs(finite_difference - np.sum(analytical)) / scale)\n",
|
||||
"plot_finite_difference_errors(errors)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 3. Fixed Step Gradient Descent"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 12,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"from geometry import compute_mesh_centroid\n",
|
||||
"\n",
|
||||
"shader = {\"flat\":True, # Flat or smooth shading of triangles\n",
|
||||
" \"wireframe\": True, \"wire_width\": 0.03, \"wire_color\": \"black\", # Wireframe rendering\n",
|
||||
" \"width\": 600, \"height\": 600, # Size of the viewer canvas\n",
|
||||
" \"antialias\": True, # Antialising, might not work on all GPUs\n",
|
||||
" \"scale\": 2.0, # Scaling of the model\n",
|
||||
" \"side\": \"DoubleSide\", # FrontSide, BackSide or DoubleSide rendering of the triangles\n",
|
||||
" \"colormap\": \"viridis\", \"normalize\": [None, None], # Colormap and normalization for colors\n",
|
||||
" \"background\": \"#ffffff\", # Background color of the canvas\n",
|
||||
" \"line_width\": 1.0, \"line_color\": \"black\", # Line properties of overlay lines\n",
|
||||
" \"bbox\": False, # Enable plotting of bounding box\n",
|
||||
" \"point_color\": \"red\", \"point_size\": 0.01 # Point properties of overlay points\n",
|
||||
" }\n",
|
||||
"\n",
|
||||
"def draw_meshes_comparison(V1, F1, V2, F2, color1, color2):\n",
|
||||
" mesh_plot = mp.plot(V1, F1, c = color1, return_plot=True)\n",
|
||||
" mesh_plot.add_mesh(V2, F2, c = color2, shading=shader)\n",
|
||||
" \n",
|
||||
" center0 = np.array(compute_mesh_centroid(V2, F2))\n",
|
||||
" center1 = center0.copy()\n",
|
||||
" center1[1] = 0\n",
|
||||
" vertices = np.vstack([center0, center1])\n",
|
||||
" mesh_plot.add_points(vertices, shading={\"point_color\": \"black\", \"point_size\": 0.1})\n",
|
||||
" mesh_plot.add_edges(vertices, np.array([[0, 1]]), shading={\"line_color\": \"black\", \"line_width\" : 0.5});"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 3.1 Input Mesh"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 13,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"with open('../data/dinosaur.json', 'r') as infile:\n",
|
||||
" [V, F] = json.load(infile)\n",
|
||||
" V = np.array(V)\n",
|
||||
" F = np.array(F)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 3.2 Fixed Step Gradient Descent"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 18,
|
||||
"metadata": {
|
||||
"scrolled": false
|
||||
},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"application/vnd.jupyter.widget-view+json": {
|
||||
"model_id": "a190a440ddb24e11b3302fe2085b2eb4",
|
||||
"version_major": 2,
|
||||
"version_minor": 0
|
||||
},
|
||||
"text/plain": [
|
||||
"Renderer(camera=PerspectiveCamera(children=(DirectionalLight(color='white', intensity=0.6, position=(0.5660395…"
|
||||
]
|
||||
},
|
||||
"metadata": {},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"from optimization import fixed_step_gradient_descent\n",
|
||||
"from geometry import compute_center_support_line\n",
|
||||
"\n",
|
||||
"x_csl = compute_center_support_line(V)\n",
|
||||
"[V1, F, objective, time] = fixed_step_gradient_descent(V, F, x_csl, w = 10, theta = 0.02, iters = 100)\n",
|
||||
"\n",
|
||||
"mesh_plot = draw_meshes_comparison(V, F, V1, F, np.array([0.3, 0.3, 0.3]), np.array([1.0, 1.0, 0]))"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 3.3 Draw Objective Energy Curve"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 19,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": 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truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
},
|
||||
{
|
||||
"data": {
|
||||
"image/png": 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truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
},
|
||||
{
|
||||
"data": {
|
||||
"image/png": "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 truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"fig = plt.figure()\n",
|
||||
"plt.plot(objective)\n",
|
||||
"plt.xlabel(\"number of iteration\")\n",
|
||||
"plt.ylabel(\"objective energy\")\n",
|
||||
"plt.show()"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 3.4 Homework"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Please optimize other meshes in the data/ folder to make them equilibrium. \n",
|
||||
"\n",
|
||||
"Simply copy the code above, change the input mesh and save the notebook as a pdf for submission.\n",
|
||||
"\n",
|
||||
"Don't forgot to plot the objective energy curve."
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 16,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"application/vnd.jupyter.widget-view+json": {
|
||||
"model_id": "5cc6a61da0a7472db18ef95466047ccc",
|
||||
"version_major": 2,
|
||||
"version_minor": 0
|
||||
},
|
||||
"text/plain": [
|
||||
"Renderer(camera=PerspectiveCamera(children=(DirectionalLight(color='white', intensity=0.6, position=(0.5094172…"
|
||||
]
|
||||
},
|
||||
"metadata": {},
|
||||
"output_type": "display_data"
|
||||
},
|
||||
{
|
||||
"data": {
|
||||
"image/png": 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truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"with open('../data/dance.json', 'r') as infile:\n",
|
||||
" [V, F] = json.load(infile)\n",
|
||||
" V = np.array(V)\n",
|
||||
" F = np.array(F)\n",
|
||||
"\n",
|
||||
"from optimization import fixed_step_gradient_descent\n",
|
||||
"from geometry import compute_center_support_line\n",
|
||||
"\n",
|
||||
"x_csl = compute_center_support_line(V)\n",
|
||||
"[V1, F, objective, time] = fixed_step_gradient_descent(V, F, x_csl, w = 10, theta = 0.02, iters = 100)\n",
|
||||
"\n",
|
||||
"mesh_plot = draw_meshes_comparison(V, F, V1, F, np.array([0.3, 0.3, 0.3]), np.array([1.0, 1.0, 0]))\n",
|
||||
"\n",
|
||||
"fig = plt.figure()\n",
|
||||
"plt.plot(objective)\n",
|
||||
"plt.xlabel(\"number of iteration\")\n",
|
||||
"plt.ylabel(\"objective energy\")\n",
|
||||
"plt.show()"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 17,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"application/vnd.jupyter.widget-view+json": {
|
||||
"model_id": "ef80b383d7d34c348b908ef7b64875dd",
|
||||
"version_major": 2,
|
||||
"version_minor": 0
|
||||
},
|
||||
"text/plain": [
|
||||
"Renderer(camera=PerspectiveCamera(children=(DirectionalLight(color='white', intensity=0.6, position=(0.5660395…"
|
||||
]
|
||||
},
|
||||
"metadata": {},
|
||||
"output_type": "display_data"
|
||||
},
|
||||
{
|
||||
"data": {
|
||||
"image/png": 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truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"with open('../data/gym.json', 'r') as infile:\n",
|
||||
" [V, F] = json.load(infile)\n",
|
||||
" V = np.array(V)\n",
|
||||
" F = np.array(F)\n",
|
||||
"\n",
|
||||
"from optimization import fixed_step_gradient_descent\n",
|
||||
"from geometry import compute_center_support_line\n",
|
||||
"\n",
|
||||
"x_csl = compute_center_support_line(V)\n",
|
||||
"[V1, F, objective, time] = fixed_step_gradient_descent(V, F, x_csl, w = 10, theta = 0.02, iters = 100)\n",
|
||||
"\n",
|
||||
"mesh_plot = draw_meshes_comparison(V, F, V1, F, np.array([0.3, 0.3, 0.3]), np.array([1.0, 1.0, 0]))\n",
|
||||
"\n",
|
||||
"fig = plt.figure()\n",
|
||||
"plt.plot(objective)\n",
|
||||
"plt.xlabel(\"number of iteration\")\n",
|
||||
"plt.ylabel(\"objective energy\")\n",
|
||||
"plt.show()"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## Derivations"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"The derivation of $\\frac{\\delta x_f}{\\delta V}$ is relativly straight forward:\n",
|
||||
"$$ \\frac{\\delta x_f}{\\delta V} = \\frac{\\delta}{\\delta V} (\\frac{v_a + v_b + v_c}{3}) = \\frac{1}{3} (\\frac{\\delta v_a}{\\delta v} + \\frac{\\delta v_b}{\\delta v} + \\frac{\\delta v_c}{\\delta v})$$\n",
|
||||
"From this we can see that if $V=v_i$, and $x_f$ has a vertex $v_i$, then the derivative is $\\frac{1}{3}$, and otherwhise $0$ !"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"The computation of $\\frac{\\delta E_{sh}}{\\delta V}$ is similarly straight forward:\n",
|
||||
"\n",
|
||||
"$$ \\frac{\\delta E_{sh}}{\\delta V} = \\frac{\\delta}{\\delta V}(\\frac{1}{2} \\sum_{e\\in E}(l_e - L_e)^2) = \\frac{1}{2} \\sum_{e\\in E} \\frac{\\delta}{\\delta V}(l_e - Le)^2 = \\sum_{e\\in E} (l_e - Le)\\frac{\\delta l_e}{\\delta V}$$\n",
|
||||
"\n",
|
||||
"Similarly as before, when we look at $\\frac{\\delta l_e}{\\delta V}$, we see that given that $l_e = \\sqrt{(x_a - x_b)^2 + (y_a - y_b)^2}$, the detivative is if $V=[x_a,y_a]$:\n",
|
||||
"\n",
|
||||
"$\\frac{\\delta l_e}{\\delta V} = \\frac{[x_a-x_b,y_a-y_b]}{l_e}$"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## Remarks"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Some functions most notably `compute_shape_energy_gradient` and `compute_equilibrium_energy_gradient` are only partialy optimized for timing, in fact they still rely on a `for in range()` instruction to loop through vertices resulting in are rather large timing impact."
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"`fixed_step_gradient_descent` also is partly complete, the slow runtime and lack of instructions made understanding the missing code portions and debuging the function troublesome."
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": null,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": []
|
||||
}
|
||||
],
|
||||
"metadata": {
|
||||
"kernelspec": {
|
||||
"display_name": "Python 3 (ipykernel)",
|
||||
"language": "python",
|
||||
"name": "python3"
|
||||
},
|
||||
"language_info": {
|
||||
"codemirror_mode": {
|
||||
"name": "ipython",
|
||||
"version": 3
|
||||
},
|
||||
"file_extension": ".py",
|
||||
"mimetype": "text/x-python",
|
||||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.9.7"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
"nbformat_minor": 4
|
||||
}
|
||||
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|
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|
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@@ -0,0 +1,758 @@
|
||||
{
|
||||
"cells": [
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 1,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"import meshplot as mp\n",
|
||||
"import numpy as np\n",
|
||||
"import sys\n",
|
||||
"import matplotlib.pyplot as plt\n",
|
||||
"import json\n",
|
||||
"import math\n",
|
||||
"import igl\n",
|
||||
"from matplotlib import pyplot as plt\n",
|
||||
"sys.path.append(\"../src/\")"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 1. Visualize Gradient"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"For a scalar value function $E$ using mesh vertices as variable (i.e, most of our energy function), \n",
|
||||
"\n",
|
||||
"we can visualize its gradient by drawing an arrow $\\frac{\\partial E}{\\partial \\boldsymbol{x}} $ at each of the mesh vertex $\\boldsymbol{x}$, which help debug your code."
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 2,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"def draw_mesh_and_gradient(V, F, G):\n",
|
||||
" fig = plt.figure()\n",
|
||||
" plt.triplot(V[:, 0], V[:, 1], triangles = F)\n",
|
||||
" plt.quiver(V[:, 0], V[:, 1], G[:, 0], G[:, 1])\n",
|
||||
" plt.axis('equal')\n",
|
||||
" plt.ylim([min(V[:, 1]) - 0.5, max(V[:, 1]) + 0.5])\n",
|
||||
" plt.show() "
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 1.1 Gradient of Mesh Area"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 3,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"from energies import compute_faces_area_gradient, vertex_cells_sum\n",
|
||||
"def compute_mesh_area_gradient(V, F):\n",
|
||||
" dAfx, dAfy = compute_faces_area_gradient(V, F)\n",
|
||||
" dAx = vertex_cells_sum(dAfx, F)\n",
|
||||
" dAy = vertex_cells_sum(dAfy, F)\n",
|
||||
" dA = np.column_stack([dAx, dAy])\n",
|
||||
" return dA"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 4,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": "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 truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"V = np.array([[0, 0, 0], [1, 0, 0], [0, 1, 0], [1, 1, 0]], dtype = float)\n",
|
||||
"F = np.array([[0, 1, 2], [1, 3, 2]])\n",
|
||||
"G = compute_mesh_area_gradient(V, F)\n",
|
||||
"draw_mesh_and_gradient(V, F, G)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 5,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": "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 truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"V = np.array([[0, 0, 0], [1, 0, 0], [0, 1, 0], [-1, 0, 0], [0, -1, 0]], dtype = float)\n",
|
||||
"F = np.array([[0, 1, 2], [0, 2, 3], [0, 3, 4], [0, 4, 1]])\n",
|
||||
"G = compute_mesh_area_gradient(V, F)\n",
|
||||
"draw_mesh_and_gradient(V, F, G)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"attachments": {
|
||||
"gradient_area_01.png": {
|
||||
"image/png": 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truncated
|
||||
},
|
||||
"gradient_area_02.png": {
|
||||
"image/png": 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truncated
|
||||
}
|
||||
},
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Referenced image\n",
|
||||
"\n",
|
||||
""
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 1.2 Gradient of Equilibrium Energy"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 6,
|
||||
"metadata": {
|
||||
"scrolled": true
|
||||
},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": 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truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"V = np.array([[0, 0, 0], [1, 0, 0], [0, 1, 0], [1, 1, 0]], dtype = float)\n",
|
||||
"F = np.array([[0, 1, 2], [1, 3, 2]])\n",
|
||||
"from energies import compute_equilibrium_energy_gradient\n",
|
||||
"G = compute_equilibrium_energy_gradient(V, F, 0.0)\n",
|
||||
"draw_mesh_and_gradient(V, F, G)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"attachments": {
|
||||
"gradient_equilibrium.png": {
|
||||
"image/png": "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 truncated
|
||||
}
|
||||
},
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Referenced image\n",
|
||||
""
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 1.3 Gradient of Shape Energy"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 7,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": 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truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"V = np.array([[1, 1, 0], [2, 1, 0], [1, 2, 0], [2, 2, 0]], dtype = float)\n",
|
||||
"F = np.array([[0, 1, 2], [1, 3, 2]])\n",
|
||||
"E = igl.edges(F)\n",
|
||||
"from energies import compute_shape_energy_gradient\n",
|
||||
"G = compute_shape_energy_gradient(V, E, [0.0, 0.0, 0.0, 0.0, 0.0])\n",
|
||||
"draw_mesh_and_gradient(V, F, G)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"attachments": {
|
||||
"gradient_shape.png": {
|
||||
"image/png": 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truncated
|
||||
}
|
||||
},
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Referenced image\n",
|
||||
""
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 2. Analytical Gradient Compared with Finite Differences"
|
||||
]
|
||||
},
|
||||
{
|
||||
"attachments": {
|
||||
"errors.png": {
|
||||
"image/png": "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 truncated
|
||||
}
|
||||
},
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Compare your hande written derivatives with the finite difference.\n",
|
||||
"\n",
|
||||
"Given a function $f(\\boldsymbol{x}), \\boldsymbol{x} \\in R^n$, because of the taylor expension, $f(\\boldsymbol{x} + \\boldsymbol{h}) = f(\\boldsymbol{x}) + \\nabla f(\\boldsymbol{x})^T\\boldsymbol{h} + o(\\vert \\vert \\boldsymbol{h} \\vert \\vert)$\n",
|
||||
"\n",
|
||||
"The finite difference at point $\\boldsymbol{x}$ with step $\\boldsymbol{h}$ is defined as $Df_h = f(\\boldsymbol{x} + \\boldsymbol{h}) - f(\\boldsymbol{x})$\n",
|
||||
"\n",
|
||||
"When $\\vert \\vert \\boldsymbol{h} \\vert \\vert \\rightarrow 0$, \n",
|
||||
"\n",
|
||||
"$$Err(f) = \\frac{Df_h - \\nabla f(\\boldsymbol{x})^T\\boldsymbol{h}}{\\vert \\vert \\boldsymbol{h} \\vert \\vert} \\rightarrow 0$$\n",
|
||||
"\n",
|
||||
"We can draw the error graph $Err(f)$ by gradually deceasing the size of $\\vert \\vert \\boldsymbol{h} \\vert \\vert$.\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"When $\\vert \\vert \\boldsymbol{h} \\vert \\vert \\leq 10^{-8}$, the percision of our computer is not enough to compute $Df_h$ correctly which causes the error grows significantly. All figures generated in this section should have this pattern (the absolute value does not matter), otherwise please check your derivatives."
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 8,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"V = np.array([[0, 0, 0], [1, 0, 0], [0, 1, 0], [1, 1, 0]], dtype = float)\n",
|
||||
"F = np.array([[0, 1, 2], [1, 3, 2]])\n",
|
||||
"E = igl.edges(F)\n",
|
||||
"deltaV = np.random.rand(V.shape[0], 2)\n",
|
||||
"deltaV /= np.linalg.norm(deltaV)\n",
|
||||
"scales = [math.pow(10, -x) for x in np.arange(3, 12.0, 0.01)]\n",
|
||||
"def plot_finite_difference_errors(errors):\n",
|
||||
" fig = plt.figure()\n",
|
||||
" ax = fig.gca()\n",
|
||||
" ax.set_yscale('log')\n",
|
||||
" ax.set_xscale('log')\n",
|
||||
" ax.plot(scales, errors)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 2.1 Mesh Area"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 9,
|
||||
"metadata": {
|
||||
"scrolled": true
|
||||
},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": "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 truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"from geometry import compute_mesh_area\n",
|
||||
"\n",
|
||||
"def compute_finite_difference_for_mesh_area(V, F, deltaV):\n",
|
||||
" V1 = V.copy()\n",
|
||||
" V1[:, 0 : 2] += deltaV\n",
|
||||
" finite_difference = compute_mesh_area(V1, F) - compute_mesh_area(V, F)\n",
|
||||
" return finite_difference\n",
|
||||
"\n",
|
||||
"gradient = compute_mesh_area_gradient(V, F)\n",
|
||||
"errors = []\n",
|
||||
"for scale in scales:\n",
|
||||
" finite_difference = compute_finite_difference_for_mesh_area(V, F, deltaV * scale)\n",
|
||||
" analytical = gradient * deltaV * scale\n",
|
||||
" errors.append(abs(finite_difference - np.sum(analytical)) / scale)\n",
|
||||
"plot_finite_difference_errors(errors)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 2.2 Equilibrium Energy"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 10,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": 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truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"from energies import compute_equilibrium_energy\n",
|
||||
"from energies import compute_equilibrium_energy_gradient\n",
|
||||
"\n",
|
||||
"\n",
|
||||
"def compute_finite_difference_for_equilibrium_energy(V, F, x_csl, deltaV):\n",
|
||||
" V1 = V.copy()\n",
|
||||
" V1[:, 0 : 2] += deltaV\n",
|
||||
" return compute_equilibrium_energy(V1, F, x_csl) - compute_equilibrium_energy(V, F, x_csl)\n",
|
||||
"\n",
|
||||
"x_csl = 0\n",
|
||||
"gradient = compute_equilibrium_energy_gradient(V, F, x_csl)\n",
|
||||
"errors = []\n",
|
||||
"for scale in scales:\n",
|
||||
" finite_difference = compute_finite_difference_for_equilibrium_energy(V, F, x_csl, deltaV * scale)\n",
|
||||
" analytical = gradient * deltaV * scale\n",
|
||||
" errors.append(abs(finite_difference - np.sum(analytical)) / scale)\n",
|
||||
"plot_finite_difference_errors(errors)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 2.3 Shape Energy"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 11,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": "iVBORw0KGgoAAAANSUhEUgAAAYEAAAEACAYAAABVtcpZAAAAOXRFWHRTb2Z0d2FyZQBNYXRwbG90bGliIHZlcnNpb24zLjQuMywgaHR0cHM6Ly9tYXRwbG90bGliLm9yZy/MnkTPAAAACXBIWXMAAAsTAAALEwEAmpwYAAA4fklEQVR4nO3dd3xUZb748c83k0IJRZpIkw6iKCWCAioWdrEgLnpXsK0NbFzvXvfq4rrqenevuOtviwoWFKSsoogNBHVXRUFBJaAgSJUaQEMNJZDJzDy/P5JJppzpM5mczPf9evEi88yZMw/D5HzP076PGGNQSimVmbLSXQGllFLpo0FAKaUymAYBpZTKYBoElFIqg2kQUEqpDKZBQCmlMpgGAaWUymAaBJRSKoOlNQiIyGki8ryIzBWRu9JZF6WUykRxBwERmSYixSKyJqB8uIhsEJHNIjIh3DmMMeuMMXcCvwQK4q2LUkqp+Ei8aSNE5HzgKDDTGHNGZZkD2AgMA4qA5cAYwAFMDDjFrcaYYhG5EpgATDLGvBruPVu0aGE6duwYV32VUipTrVixYp8xpqXVc9nxntQYs1hEOgYUDwA2G2O2AIjIa8BIY8xE4IoQ55kHzBORBUDYINCxY0cKCwvjrbJSSmUkEdke6rm4g0AIbYGdPo+LgIGhDhaRocAoIA9YGOKYccA4gA4dOiSpmkoppSD5QUAsykL2NxljPgU+DXdCY8wUEdkDjMjNze2fUO2UUkr5SfbsoCKgvc/jdsDuRE9qjJlvjBnXpEmTRE+llFLKR7KDwHKgm4h0EpFcYDQwL9GTisgIEZlSUlKScAWVUkpVS2SK6GxgGdBDRIpE5DZjjAsYD3wIrAPmGGPWJqeqSimlki3uKaLpUFBQYHR2kFJKxUZEVhhjLNdi2SJtRLK6g4473WzZezRJtVJKKfuzRRBIxsDwZxv3ctojH3DRXz/D7bFP60cppQBS1WtjiyCQjJbA2yuLqn4ud3uSUS2llEq5creHh99Zw5TFW1JyflsEgWS0BHxjaJnLPwiUudx8vfVA3OdWSqlUOHDMyY1Tv2LWl9s5WFqekvewRRBIhrzs6n9qYEtgwpvf8csXlrH70PGarpZSSlna8OMRRk7+nJU7DvH3a89iwqU9U/I+yV4xnBIiMgIY0bVr17jPkSXVi5mdAS2BTzcUA+Cx0UwppVTd9a+1P/Lfr39Lw7xs5txxLn3aN03Ze9miJZCM7iCnz91/YEvA28zSGKCUSidjDJM+2cS4WSvo2iqfeeOHpDQAgE1aAsnge/cf2BLw8s4a2n3oOKVON11b5Vse98pX2+naMp+BnZsnv6JKqYx03Onm/rmreG/1Hq7q04Ynrj6TejmOlL9vxgQB37v/wIFhL3dlU2DQE58AsO2Jy1m8cS9b9h7l5sGdqo576O01Vc8rpVSidh86zrhZhazdfZgJl/bkjvM7I2KVjzP5bNEdlIwpor53/6GmiHo8hjnLd/qV3TTta/4w/3uOlbl49N01lDpdcddBKaUCrdh+gCsnfcG2faVM/VUBd17QpcYCANgkCCRjTKDcXd3hH6o76MAxJw+8udryuZe/2MqMZduZumRr3HVQSilfc5bvZPSUL8nPc/DOPYO4qOfJNV6HjOkOcro8ZGcJLo+pGiT+fNM+sh3VEbfooP8UUY/PymJvZC4td9dAbZVSdZnL7eHxheuZ9sVWzuvWgklj+tGkQU5a6pIxQaDM7aFhXjYlx8uruoNumPqV3zG/eWOV3+NjPl0/uY6KRlOoVoSvE+Vu1u05TN8OJyVabaVUHVNSWs742StZsmkftw7uxO8u60m2I32dMrboDkrGmEC5y0N+XkXMc7o8uKJIHfHllupVxN4WQzRBYMKbq/nFs0v56fCJOGurlKqLNhdXLAD7cst+/nL1mTwyoldaAwDYJAgka52ANwiUuTzsO+oMOiY32//jmOAzPuDIqggC0eQdWrnjEFAx5UsppQAWrS/mF5OXcrTMxeyx5/DLs9tHflENsEUQSIYT5W4a1asIAuVuQ5kr+AIdeJe//1h1oHjk3Yq9cZZs2hf0umNlLm6a9nVVmmrvyuOsGhzhV0rVTsYYXvjsB26dsZwOzRvw7vghFHRslu5qVcmYIFDqdNO0QS5QcbGPplvHyi6L/EKLNhSzeONenvxwA1A9oOzyaLZSpTLZiXI3981ZxcT313NZ71OYe+cg2jatn+5q+cmYgeFjZS5Oqhx9L3d7/NJIxOunwyc4uXE9Fn63B4Cmlef3TirynZaqlMosP5ac4I5ZhawqKuF/ftadey7sWqPz/6OV9iAgIg2BxcCjxpj3UvEeLreHMpen6iL96LzkbHv87KLNXNmnLQu/+xGAxvUrzu9deRxva0MpZW/f7jzEuJmFHCtzMeXG/vzs9NbprlJIiWw0P01EikVkTUD5cBHZICKbRWRCFKf6LTAn3npEwzu339sdlCyOrCxKjlePGzSpDALe7qBktDaUUvby9jdF/PKFZeTlZPHm3YNqdQCAxFoC04FJwExvgYg4gMnAMKAIWC4i8wAHMDHg9bcCZwLfA/USqEdEpWXeIJDcxRg5DiEvuzrBU71sBwePOasGlHUHM6Uyh9tj+MsH63lh8RbO6dyMZ6/vT7OGyb3xTIW4g4AxZrGIdAwoHgBsNsZsARCR14CRxpiJwBWB5xCRC4GGQC/guIgsNMYk/crpXfSVn5eNSPJSRjuyxG+zGo8x3PvaN1WPR0/5ktV/+BmN66VnJaBSqmYcPlHOf83+hkUb9nLjOafyyIhe5KR5/n+0kj0m0BbwzcBWBAwMdbAx5iEAEbkZ2GcVAERkHDAOoEOHDnFVqqy8Yo1Afl52UvcMyM6SqvUDUDEQ/GOJ/wKxrXuPcVaK84ErpdJn675j3D5jOdv3l/Knq87ghnNOTXeVYpLsIGA19B3xsmuMmR7muSkisgcYkZub2z+eSvVq05g1j/08npeG5cjK8tuN7O//3hg0DqDjAkrVXYs37mX8qytxZAn/vH0g59hwj5Fkt1eKAN9lcO2A3Ul+j1oj2yH4XuOtLvi+M4SKDpZyx6xCXUmslM0ZY5j6+VZufvlr2jStz7zxQ2wZACD5QWA50E1EOolILjAamJfoSZORNiIVHFlStRtZKN6FaZ9v2sef3lvHh2t/YlHlnsZKKfspc7l5YO5q/vje9wzrdTJv3jWI9s0apLtacYu7O0hEZgNDgRYiUkTFPP+pIjIe+JCKGUHTjDEJT8pPxkbzqZAdRRAoc3n4ywfreenzrTSvnCmQl22PASOllL/iIye4c9YKVu44xH9d3I3/urgbWVm1bwFYLBKZHTQmRPlCYGHcNbI+53xgfkFBwdhknjdR2VlStTAslDKXmy37jgHVuYh2HihNed2UUsm1ZlcJY2cWcqi0nGev78dlvU9Jd5WSwha3pMlIJe218N7zklCjCiLit/GMlVKn228GEcAf5n+ftDoopVJv/qrdXPP8UrJEmHvXuXUmAIBNgkAyxwR6tWlctYBjWK/EtnJzeUzE7qBSp5scR3BzcdXOQ3ScsIC1u0soPnKCy59ewpzCnRZnUEqli8dj+H8fbuA/Z3/DGW2a8O74wZzepnaNTSbKFkEgmS0BgCdG9aZLy4Y8d30/runfLu7zeDwmYndQxbaWwR/z/FUVk6beXLGLLXuPsXb3Yf6oLQSlao2jZS7GzVrBpEWbGX12e14dew4t8vPSXa2ks0UQSPbsoJ+d3pqPfzOUbEcWl5wWf2vAbUzE7iDv3saBXvq8YsP6HQdK+XBtRQK6I2WuoOOUUjVvx/5SRj37BYs2FPPYlaczcVTvoE2n6oq0ZxFNt8D+eiu92zbhu13BrRB3NC0Btzvs8nGn28PLX2yLWAelVM1Y+sM+7n5lJcbAzFsHMLhri3RXKaVsEdqS3R3kK/D6bNV/3/9U6w3jT5S72XUweJMZX05XcvYuUEqlljGGWcu2cePUr2mZn8e88YPrfAAAmwSBVC4WC9wC0uo//aZzT62a4+/rmU82M/H99QCWXT4Ab67cxdvf7EpCTZVSqeJ0eXjonTU8/O5ahnZvyVt3D+LU5g3TXa0aYYsgkEqB3UF3XdCFz+4f6lfWuWU+Kx4eFvY8ofoLDxwL3tDelwnoTgp8rJRKrf1Hy7hh6le8+tUO7h7ahSk3FdAogzL/2iIIpLQ7KKAlkJUlcd0BlEbIB1Q/x8G88YMjnsd3nPnAMSeHT5THXBelVHS+332YKyd9waqdh3hqdB8eGN4zqnHCusQWQSCl3UEh/sO9u4Qly43nnhrU9QSwZNM+v8dTFm9h0fqK3EL9/vhvznn8Y7/njTFVrYWig6X8zxurKHNpQjqlYvX+d3u4+rmluD2GN+48l5F92qa7SmlhiyCQSlYXZoDFD1yYtPcY0LEZE6K8w/jzB+u5ZfryqselTjeDn/iEKyd9DsD4V79h1HNLAfj9O2uYu6KIZT/sT1pdlarrPB7DPz7ayF2vrKTnKY2YN34wZ7Zrmu5qpU3GB4HA2UHey3S4lsDi+2MLEK0a55EVsAFNLHYdOs7qohJcbg8LvtvDNzsO8drXO/h0w14gummuSikodbq459WV/OOjTVzdrx2zx55Dq8Yp3d221sv4dQLelkBedhbnd29J73aRu5xiXTTSINfh917xOlhaPT7w5w/WV/2sY8lKRVZ0sJSxM1ew4cfD/P7y07htSCckwd/JusAWQSCVqaS9d9FdWubz4k0FMb0mWg1ys+N6XSDfjet9A0KkQWmlMt3XWw9w1z9X4HR7mHbz2Qzt0SrdVao1bNEdVBPrBGK5mQ61JsDX7y8/rern+pUtgcCZSLEqD7HorNSp6SaUCmX21zu4/qUvaVI/h3fuGawBIIAtWgKp5L0uxzI/32GxqjjQ7ed15rtdJbz77W4a5Dj83isa9835NqgsVBA4pi0BpYKUuz386b3vmbFsO+d3b8kzY/omfdZfXaBLine truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"from energies import compute_shape_energy\n",
|
||||
"from energies import compute_shape_energy_gradient\n",
|
||||
"from energies import compute_edges_length\n",
|
||||
"\n",
|
||||
"def compute_finite_difference_for_shape_energy(V, E, l0, deltaV):\n",
|
||||
" V1 = V.copy()\n",
|
||||
" V1[:, 0 : 2] += deltaV\n",
|
||||
" return compute_shape_energy(V1, E, l0) - compute_shape_energy(V, E, l0)\n",
|
||||
"\n",
|
||||
"x_csl = 0\n",
|
||||
"l0 = [0, 0, 0, 0, 0]\n",
|
||||
"gradient = compute_shape_energy_gradient(V, E, l0)\n",
|
||||
"errors = []\n",
|
||||
"for scale in scales:\n",
|
||||
" finite_difference = compute_finite_difference_for_shape_energy(V, E, l0, deltaV * scale)\n",
|
||||
" analytical = gradient * deltaV * scale\n",
|
||||
" errors.append(abs(finite_difference - np.sum(analytical)) / scale)\n",
|
||||
"plot_finite_difference_errors(errors)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 3. Fixed Step Gradient Descent"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 12,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"from geometry import compute_mesh_centroid\n",
|
||||
"\n",
|
||||
"shader = {\"flat\":True, # Flat or smooth shading of triangles\n",
|
||||
" \"wireframe\": True, \"wire_width\": 0.03, \"wire_color\": \"black\", # Wireframe rendering\n",
|
||||
" \"width\": 600, \"height\": 600, # Size of the viewer canvas\n",
|
||||
" \"antialias\": True, # Antialising, might not work on all GPUs\n",
|
||||
" \"scale\": 2.0, # Scaling of the model\n",
|
||||
" \"side\": \"DoubleSide\", # FrontSide, BackSide or DoubleSide rendering of the triangles\n",
|
||||
" \"colormap\": \"viridis\", \"normalize\": [None, None], # Colormap and normalization for colors\n",
|
||||
" \"background\": \"#ffffff\", # Background color of the canvas\n",
|
||||
" \"line_width\": 1.0, \"line_color\": \"black\", # Line properties of overlay lines\n",
|
||||
" \"bbox\": False, # Enable plotting of bounding box\n",
|
||||
" \"point_color\": \"red\", \"point_size\": 0.01 # Point properties of overlay points\n",
|
||||
" }\n",
|
||||
"\n",
|
||||
"def draw_meshes_comparison(V1, F1, V2, F2, color1, color2):\n",
|
||||
" mesh_plot = mp.plot(V1, F1, c = color1, return_plot=True)\n",
|
||||
" mesh_plot.add_mesh(V2, F2, c = color2, shading=shader)\n",
|
||||
" \n",
|
||||
" center0 = np.array(compute_mesh_centroid(V2, F2))\n",
|
||||
" center1 = center0.copy()\n",
|
||||
" center1[1] = 0\n",
|
||||
" vertices = np.vstack([center0, center1])\n",
|
||||
" mesh_plot.add_points(vertices, shading={\"point_color\": \"black\", \"point_size\": 0.1})\n",
|
||||
" mesh_plot.add_edges(vertices, np.array([[0, 1]]), shading={\"line_color\": \"black\", \"line_width\" : 0.5});"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 3.1 Input Mesh"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 13,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"with open('../data/dinosaur.json', 'r') as infile:\n",
|
||||
" [V, F] = json.load(infile)\n",
|
||||
" V = np.array(V)\n",
|
||||
" F = np.array(F)"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 3.2 Fixed Step Gradient Descent"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 14,
|
||||
"metadata": {
|
||||
"scrolled": false
|
||||
},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"application/vnd.jupyter.widget-view+json": {
|
||||
"model_id": "802b490712b6432aa7930e5d327f2960",
|
||||
"version_major": 2,
|
||||
"version_minor": 0
|
||||
},
|
||||
"text/plain": [
|
||||
"Renderer(camera=PerspectiveCamera(children=(DirectionalLight(color='white', intensity=0.6, position=(0.5046897…"
|
||||
]
|
||||
},
|
||||
"metadata": {},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"from optimization import fixed_step_gradient_descent\n",
|
||||
"from geometry import compute_center_support_line\n",
|
||||
"\n",
|
||||
"x_csl = compute_center_support_line(V)\n",
|
||||
"[V1, F, objective, time] = fixed_step_gradient_descent(V, F, x_csl, w = 10, theta = 0.02, iters = 100)\n",
|
||||
"\n",
|
||||
"mesh_plot = draw_meshes_comparison(V, F, V1, F, np.array([0.3, 0.3, 0.3]), np.array([1.0, 1.0, 0]))"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"# 3.3 Draw Objective Energy Curve"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 15,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"image/png": "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 truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"fig = plt.figure()\n",
|
||||
"plt.plot(objective)\n",
|
||||
"plt.xlabel(\"number of iteration\")\n",
|
||||
"plt.ylabel(\"objective energy\")\n",
|
||||
"plt.show()"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## 3.4 Homework"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Please optimize other meshes in the data/ folder to make them equilibrium. \n",
|
||||
"\n",
|
||||
"Simply copy the code above, change the input mesh and save the notebook as a pdf for submission.\n",
|
||||
"\n",
|
||||
"Don't forgot to plot the objective energy curve."
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 16,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"application/vnd.jupyter.widget-view+json": {
|
||||
"model_id": "6de410c9dcb4499cb12875656da3e24c",
|
||||
"version_major": 2,
|
||||
"version_minor": 0
|
||||
},
|
||||
"text/plain": [
|
||||
"Renderer(camera=PerspectiveCamera(children=(DirectionalLight(color='white', intensity=0.6, position=(0.5094172…"
|
||||
]
|
||||
},
|
||||
"metadata": {},
|
||||
"output_type": "display_data"
|
||||
},
|
||||
{
|
||||
"data": {
|
||||
"image/png": "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 truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"with open('../data/dance.json', 'r') as infile:\n",
|
||||
" [V, F] = json.load(infile)\n",
|
||||
" V = np.array(V)\n",
|
||||
" F = np.array(F)\n",
|
||||
"\n",
|
||||
"from optimization import fixed_step_gradient_descent\n",
|
||||
"from geometry import compute_center_support_line\n",
|
||||
"\n",
|
||||
"x_csl = compute_center_support_line(V)\n",
|
||||
"[V1, F, objective, time] = fixed_step_gradient_descent(V, F, x_csl, w = 10, theta = 0.02, iters = 100)\n",
|
||||
"\n",
|
||||
"mesh_plot = draw_meshes_comparison(V, F, V1, F, np.array([0.3, 0.3, 0.3]), np.array([1.0, 1.0, 0]))\n",
|
||||
"\n",
|
||||
"fig = plt.figure()\n",
|
||||
"plt.plot(objective)\n",
|
||||
"plt.xlabel(\"number of iteration\")\n",
|
||||
"plt.ylabel(\"objective energy\")\n",
|
||||
"plt.show()"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 17,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"application/vnd.jupyter.widget-view+json": {
|
||||
"model_id": "f0815cebdcac4f43ac6d2666d009cf19",
|
||||
"version_major": 2,
|
||||
"version_minor": 0
|
||||
},
|
||||
"text/plain": [
|
||||
"Renderer(camera=PerspectiveCamera(children=(DirectionalLight(color='white', intensity=0.6, position=(0.5660395…"
|
||||
]
|
||||
},
|
||||
"metadata": {},
|
||||
"output_type": "display_data"
|
||||
},
|
||||
{
|
||||
"data": {
|
||||
"image/png": 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truncated
|
||||
"text/plain": [
|
||||
"<Figure size 432x288 with 1 Axes>"
|
||||
]
|
||||
},
|
||||
"metadata": {
|
||||
"needs_background": "light"
|
||||
},
|
||||
"output_type": "display_data"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"with open('../data/gym.json', 'r') as infile:\n",
|
||||
" [V, F] = json.load(infile)\n",
|
||||
" V = np.array(V)\n",
|
||||
" F = np.array(F)\n",
|
||||
"\n",
|
||||
"from optimization import fixed_step_gradient_descent\n",
|
||||
"from geometry import compute_center_support_line\n",
|
||||
"\n",
|
||||
"x_csl = compute_center_support_line(V)\n",
|
||||
"[V1, F, objective, time] = fixed_step_gradient_descent(V, F, x_csl, w = 10, theta = 0.02, iters = 100)\n",
|
||||
"\n",
|
||||
"mesh_plot = draw_meshes_comparison(V, F, V1, F, np.array([0.3, 0.3, 0.3]), np.array([1.0, 1.0, 0]))\n",
|
||||
"\n",
|
||||
"fig = plt.figure()\n",
|
||||
"plt.plot(objective)\n",
|
||||
"plt.xlabel(\"number of iteration\")\n",
|
||||
"plt.ylabel(\"objective energy\")\n",
|
||||
"plt.show()"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## Derivations"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"The derivation of $\\frac{\\delta x_f}{\\delta V}$ is relativly straight forward:\n",
|
||||
"$$ \\frac{\\delta x_f}{\\delta V} = \\frac{\\delta}{\\delta V} (\\frac{v_a + v_b + v_c}{3}) = \\frac{1}{3} (\\frac{\\delta v_a}{\\delta v} + \\frac{\\delta v_b}{\\delta v} + \\frac{\\delta v_c}{\\delta v})$$\n",
|
||||
"From this we can see that if $V=v_i$, and $x_f$ has a vertex $v_i$, then the derivative is $\\frac{1}{3}$, and otherwhise $0$ !"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"The computation of $\\frac{\\delta E_{sh}}{\\delta V}$ is similarly straight forward:\n",
|
||||
"\n",
|
||||
"$$ \\frac{\\delta E_{sh}}{\\delta V} = \\frac{\\delta}{\\delta V}(\\frac{1}{2} \\sum_{e\\in E}(l_e - L_e)^2) = \\frac{1}{2} \\sum_{e\\in E} \\frac{\\delta}{\\delta V}(l_e - Le)^2 = \\sum_{e\\in E} (l_e - Le)\\frac{\\delta l_e}{\\delta V}$$\n",
|
||||
"\n",
|
||||
"Similarly as before, when we look at $\\frac{\\delta l_e}{\\delta V}$, we see that given that $l_e = \\sqrt{(x_a - x_b)^2 + (y_a - y_b)^2}$, the detivative is if $V=[x_a,y_a]$:\n",
|
||||
"\n",
|
||||
"$\\frac{\\delta l_e}{\\delta V} = \\frac{[x_a-x_b,y_a-y_b]}{l_e}$"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"## Remarks"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"Some functions most notably `compute_shape_energy_gradient` and `compute_equilibrium_energy_gradient` are only partialy optimized for timing, in fact they still rely on a `for in range()` instruction to loop through vertices resulting in are rather large timing impact."
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "markdown",
|
||||
"metadata": {},
|
||||
"source": [
|
||||
"`fixed_step_gradient_descent` also is partly complete, the slow runtime and lack of instructions made understanding the missing code portions and debuging the function troublesome."
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": null,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": []
|
||||
}
|
||||
],
|
||||
"metadata": {
|
||||
"kernelspec": {
|
||||
"display_name": "Python 3 (ipykernel)",
|
||||
"language": "python",
|
||||
"name": "python3"
|
||||
},
|
||||
"language_info": {
|
||||
"codemirror_mode": {
|
||||
"name": "ipython",
|
||||
"version": 3
|
||||
},
|
||||
"file_extension": ".py",
|
||||
"mimetype": "text/x-python",
|
||||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.9.7"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
"nbformat_minor": 4
|
||||
}
|
||||
Reference in new issue
Block a user