350 lines
11 KiB
Java
350 lines
11 KiB
Java
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/*
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* Author: Cedric Holzl - Mohamed Khadri
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* Sciper: 257844 - 261203
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*/
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package ch.epfl.alpano;
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import static ch.epfl.alpano.Preconditions.checkBounds;
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import java.util.Arrays;
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/**
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* Panorama data holder computed using PanoramaComputer class using given
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* panorama parameters
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*
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* @see PanoramaComputer
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* @see PanoramaParameters
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* @see Panorama.Builder
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*/
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public final class Panorama {
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private final float[] distance;
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private final float[] longitude;
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private final float[] latitude;
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private final float[] altitude;
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private final float[] slope;
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private final PanoramaParameters parameters;
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/**
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* Panorama constructor
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*
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* @param parameters
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* : the PanoramaParameters
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* @param distance
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* : float table containing the distances
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* @param longitude
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* : float table containing the longitudes
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* @param latitude
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* : float table containing the latitudes
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* @param altitude
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* : float table containing the altitudes
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* @param slope
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* : float table containing the slopes
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*/
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private Panorama(PanoramaParameters parameters, float[] distance,
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float[] longitude, float[] latitude, float[] altitude,
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float[] slope) {
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this.distance = distance;
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this.longitude = longitude;
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this.latitude = latitude;
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this.altitude = altitude;
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this.slope = slope;
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this.parameters = parameters;
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}
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/**
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* Returns the parameters of the panorama
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*
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* @return the PanoramaParameters of the panorama
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*/
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public PanoramaParameters parameters() {
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return this.parameters;
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}
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/**
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* Returns the distance given a certain index x,y
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*
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* @param x
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* horizontal index
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* @param y
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* : vertical index
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* @return the distance given x,y
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* @throws IndexOutOfBoundsException
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* if x or y are out of bounds
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*/
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public float distanceAt(int x, int y) {
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checkBounds(parameters().isValidSampleIndex(x, y));
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return this.distance[parameters().linearSampleIndex(x, y)];
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}
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/**
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* Returns the distance given a certain index x,y
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*
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* @param x
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* horizontal index
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* @param y
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* : vertical index
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* @param d
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* : the default distance
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* @return the distance given x,y or the default distance if x or y are out
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* of bounds
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*/
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public float distanceAt(int x, int y, float d) {
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if (parameters().isValidSampleIndex(x, y))
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return this.distance[parameters().linearSampleIndex(x, y)];
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else
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return d;
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}
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/**
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* Returns the latitude given a certain index x,y
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*
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* @param x
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* horizontal index
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* @param y
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* : vertical index
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* @return the latitude given x,y
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* @throws IndexOutOfBoundsException
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* if x or y are out of bounds
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*/
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public float latitudeAt(int x, int y) {
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checkBounds(parameters().isValidSampleIndex(x, y));
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return this.latitude[parameters().linearSampleIndex(x, y)];
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}
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/**
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* Returns the longitude given a certain index x,y
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*
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* @param x
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* horizontal index
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* @param y
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* : vertical index
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* @return the longitude given x,y
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* @throws IndexOutOfBoundsException
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* if x or y are out of bounds
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*/
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public float longitudeAt(int x, int y) {
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checkBounds(parameters().isValidSampleIndex(x, y));
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return this.longitude[parameters().linearSampleIndex(x, y)];
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}
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/**
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* Returns the altitude given a certain index x,y
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*
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* @param x
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* horizontal index
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* @param y
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* : vertical index
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* @return the altitude given x,y
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* @throws IndexOutOfBoundsException
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* if x or y are out of bounds
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*/
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public float elevationAt(int x, int y) {
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checkBounds(parameters().isValidSampleIndex(x, y));
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return this.altitude[parameters().linearSampleIndex(x, y)];
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}
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/**
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* Returns the slope given a certain index x,y
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*
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* @param x
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* horizontal index
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* @param y
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* : vertical index
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* @return the slope given x,y
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* @throws IndexOutOfBoundsException
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* if x or y are out of bounds
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*/
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public float slopeAt(int x, int y) {
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checkBounds(parameters().isValidSampleIndex(x, y));
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return this.slope[parameters().linearSampleIndex(x, y)];
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}
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/**
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* Panorama Builder:
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*
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* Gathers data for a Panorama and builds it.
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*
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* @see Panorama
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* @see PanoramaComputer
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*/
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public final static class Builder {
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private float[] distance;
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private float[] longitude;
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private float[] latitude;
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private float[] altitude;
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private float[] slope;
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private final PanoramaParameters parameters;
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/**
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* Constructor of a panorama builder
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*
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* @param pp
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* : the panorama parameters
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* @throws NullPointerException
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* if the PanoramaParameters object is null
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*/
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public Builder(PanoramaParameters pp) {
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this.parameters = pp;
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int size = pp.width() * pp.height();
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this.distance = new float[size];
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this.longitude = new float[size];
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this.latitude = new float[size];
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this.altitude = new float[size];
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this.slope = new float[size];
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Arrays.fill(distance, Float.POSITIVE_INFINITY);
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}
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/**
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* Enters the distance into the table at a given index
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*
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* @param x
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* : horizontal index
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* @param y
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* : vertical index
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* @param distance
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* : the value to enter in the table
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* @return the builder (itself)
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* @throws IllegalStateException
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* if the Panorama has already been created
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* @throws IndexOutOfBoundsException
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* if x or y are out of bounds
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* @see checkBuilder
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*/
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public Builder setDistanceAt(int x, int y, float distance) {
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checkBuilder();
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checkBounds(this.parameters.isValidSampleIndex(x, y));
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this.distance[this.parameters.linearSampleIndex(x, y)] = distance;
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return this;
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}
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/**
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* Enters the longitude into the table at a given index
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*
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* @param x
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* : horizontal index
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* @param y
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* : vertical index
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* @param longitude
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* : the value to enter in the table
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* @return the builder (itself)
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* @throws IllegalStateException
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* if the panorama has already been created
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* @throws IndexOutOfBoundsException
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* if x or y are out of bounds
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* @see checkBuilder
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*/
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public Builder setLongitudeAt(int x, int y, float longitude) {
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checkBuilder();
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checkBounds(this.parameters.isValidSampleIndex(x, y));
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this.longitude[this.parameters.linearSampleIndex(x, y)] = longitude;
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return this;
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}
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/**
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* Enters the latitude into the table at a given index
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*
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* @param x
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* : horizontal index
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* @param y
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* : vertical index
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* @param latitude
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* : the value to enter in the table
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* @return the builder (itself)
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* @throws IllegalStateException
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* if the panorama has already been created
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* @throws IndexOutOfBoundsException
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* if x or y are out of bounds
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* @see checkBuilder
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*/
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public Builder setLatitudeAt(int x, int y, float latitude) {
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checkBuilder();
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checkBounds(this.parameters.isValidSampleIndex(x, y));
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this.latitude[this.parameters.linearSampleIndex(x, y)] = latitude;
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return this;
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}
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/**
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* Enters the altitude into the table at a given index
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*
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* @param x
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* : horizontal index
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* @param y
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* : vertical index
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* @param elevation
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* : the value to enter in the table
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* @return the builder (itself)
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* @throws IllegalStateException
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* if the panorama has already been created
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* @throws IndexOutOfBoundsException
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* if x or y are out of bounds
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* @see checkBuilder
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*/
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public Builder setElevationAt(int x, int y, float elevation) {
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checkBuilder();
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checkBounds(this.parameters.isValidSampleIndex(x, y));
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this.altitude[this.parameters.linearSampleIndex(x, y)] = elevation;
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return this;
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}
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/**
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* Enters the slope into the table at a given index
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*
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* @param x
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* : horizontal index
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* @param y
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* : vertical index
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* @param slope
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* : the value to enter in the table
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* @return the builder (itself)
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* @throws IllegalStateException
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* if the panorama has already been created
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* @throws IndexOutOfBoundsException
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* if x or y are out of bounds
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* @see checkBuilder
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*/
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public Builder setSlopeAt(int x, int y, float slope) {
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checkBuilder();
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checkBounds(this.parameters.isValidSampleIndex(x, y));
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this.slope[this.parameters.linearSampleIndex(x, y)] = slope;
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return this;
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}
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/**
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* Creates and returns the panorama
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*
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* @return the panorama
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* @throws IllegalStateException
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* if the panorama has already been created
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* @see checkBuilder
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*/
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public Panorama build() {
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checkBuilder();
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Panorama p = new Panorama(parameters, distance, longitude, latitude,
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altitude, slope);
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this.distance = null;
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this.longitude = null;
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this.latitude = null;
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this.altitude = null;
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this.slope = null;
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return p;
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}
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/**
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* Checks if the panorama has already been built
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*
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* @throws IllegalStateException
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* if the panorama has already been created
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*/
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private void checkBuilder() {
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if (!(distance != null && longitude != null && latitude != null
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&& altitude != null && slope != null))
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throw new IllegalStateException();
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}
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}
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}
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