112 lines
3.4 KiB
Java
112 lines
3.4 KiB
Java
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/*
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File: CoordinateSystem.java
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University of Applied Science Berne,HTA-Biel/Bienne,
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Computer Science Department.
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Diploma thesis J3D Solar System Simulator
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Originally written by Marcel Portner & Bernhard Hari (c) 2000
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CVS - Information :
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$Header: /var/cvsreps/projects/c450/2000/sss3d/source_diploma/sss3d/contentbranch/CoordinateSystem.java,v 1.3 2000/12/12 14:29:07 harib Exp $
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$Author: harib $
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$Date: 2000/12/12 14:29:07 $
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$State: Exp $
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*/
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package sss3d.contentbranch;
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import javax.media.j3d.*;
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/**
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* This class creates a right-handed 3D coordinate system.
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*
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* @author Marcel Portner & Bernhard Hari
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* @version $Revision: 1.3 $
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*/
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public class CoordinateSystem extends Shape3D {
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/**
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* Definition of the geometry of the three axis.
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*/
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private static final float EXTREMITES[] = {
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// x-axis
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0.0f, 0.0f, 0.0f,
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1.0f, 0.0f, 0.0f,
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// y-axis
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0.0f, 0.0f, 0.0f,
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0.0f, 1.0f, 0.0f,
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// z-axis
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0.0f, 0.0f, 0.0f,
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0.0f, 0.0f, 1.0f
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};
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/**
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* Colors of the three axis.
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*/
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private static final float COLOR[] = {
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// x-axis
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1.0f, 1.0f, 0.0f,
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1.0f, 1.0f, 0.0f,
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// y-axis
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0.0f, 0.0f, 1.0f,
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0.0f, 0.0f, 1.0f,
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// z-axis
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1.0f, 0.0f, 0.0f,
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1.0f, 0.0f, 0.0f
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};
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/**
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* The scale factor
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*/
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private static final float SCALE = 1.0f;
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private float scale;
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/**
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* Initializes a new coordinate system with the length
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* of the axis to one meter.
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*/
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public CoordinateSystem() {
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this(SCALE);
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}
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/**
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* Initializes a new coordinate system.
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*
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* @param scale the scale factor to adjust the axis's length in meter.
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*/
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public CoordinateSystem(float scale) {
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this.scale = scale;
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this.setGeometry(createGeometry());
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}
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/**
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* Returns the Geometry of the coordinate system.
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*
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* @return the Geometry of a coordinate system. The axis has three
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* different colors and is scaled.
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*/
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private Geometry createGeometry() {
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// Construction of the axis (LineArray).
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LineArray axis = new LineArray(6, LineArray.COORDINATES |
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LineArray.COLOR_3);
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// Scalling of the vertices of the 3 axis using scale.
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float scaledExtremites[] = new float[EXTREMITES.length];
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for(int i = 0; i < EXTREMITES.length; i++) {
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scaledExtremites[i] = EXTREMITES[i] * scale;
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}
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axis.setCoordinates(0, scaledExtremites);
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axis.setColors(0, COLOR);
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return axis;
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}
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}
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