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cs457-gc/assignment_3_3/notebook/tracing_test.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "from meshplot import plot"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import sys\n",
+    "sys.path.append('../src')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import importlib, tracer_helper, tracer_utils\n",
+    "importlib.reload(tracer_helper)\n",
+    "importlib.reload(tracer_utils)\n",
+    "from tracer_utils import asymptotic_path\n",
+    "from tracer_helper import Mesh"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Example\n",
+    "Build mesh from file"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "f19ce42be2f6405796de381ba4b89b42",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "Renderer(camera=PerspectiveCamera(aspect=1.5, children=(DirectionalLight(color='white', intensity=0.6, positio…"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "mesh = Mesh(\"../data/Model01.obj\")\n",
+    "p = plot(mesh.V, mesh.F, shading={\"wireframe\": True,\"width\": 900, \"height\": 600}, return_plot=True, c=np.array([0,0.7,1]))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Trace first asymptotic curve\n",
+    "Use principal directions V1"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Set tracing parameters\n",
+    "num_steps = 1000\n",
+    "step_size = 1e-6\n",
+    "num_neighbors = 4\n",
+    "first_principal_direction = False\n",
+    "\n",
+    "# Pre-selection of vertices\n",
+    "idxA = [167,173,178,146,159,291,49,40,254,57,15,65,268,341,283]\n",
+    "# Tracing\n",
+    "for idx in idxA:\n",
+    "    P, A, PP = asymptotic_path(idx, mesh, num_steps, step_size, first_principal_direction, num_neighbors)\n",
+    "\n",
+    "    # Plot starting vertex\n",
+    "    p.add_points(np.array([mesh.V[idx]]), shading={\"point_size\": 0.7, \"point_color\": \"black\"})\n",
+    "    # Plot edge-points shaping the asymptotic path\n",
+    "    p.add_points(P, shading={\"point_size\": 0.2,\"point_color\": \"white\"})\n",
+    "    # Plot asymptotic curve\n",
+    "    if(len(P)>1): \n",
+    "        p.add_lines(P[:-1], P[1:], shading={\"line_color\": \"white\"})"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Trace second asymptotic curve\n",
+    "Use principal directions V2"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Set tracing parameters\n",
+    "num_steps = 1000\n",
+    "step_size = 1e-6\n",
+    "num_neighbors = 4\n",
+    "first_principal_direction = True\n",
+    "\n",
+    "# Pre-selection of vertices\n",
+    "idxB = [119,203,188,129,95,66,308,298,290,282,335,143,81,73,33]\n",
+    "# Tracing\n",
+    "for idx in idxB:\n",
+    "    P, A, PP = asymptotic_path(idx, mesh, num_steps, step_size, first_principal_direction, num_neighbors)\n",
+    "    \n",
+    "    # Plot starting vertex\n",
+    "    p.add_points(np.array([mesh.V[idx]]), shading={\"point_size\": 0.7, \"point_color\": \"black\"})\n",
+    "    # Plot edge-points shaping the asymptotic path\n",
+    "    p.add_points(P, shading={\"point_size\": 0.2,\"point_color\": \"yellow\"})\n",
+    "    # Plot asymptotic curve\n",
+    "    if(len(P)>1): \n",
+    "        p.add_lines(P[:-1], P[1:], shading={\"line_color\": \"yellow\"})"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "interpreter": {
+   "hash": "d74ce2d711eca57e47550fdd427f707c5faa08517318f0967f4aae699c902c0e"
+  },
+  "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
+}