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Update BoundingSphereDebug.java
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‎jme3-core/src/main/java/com/jme3/environment/util/BoundingSphereDebug.java‎

Lines changed: 154 additions & 164 deletions
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/*
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* Copyright (c) 2009-2024 jMonkeyEngine
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.jme3.environment.util;
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import com.jme3.asset.AssetManager;
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import com.jme3.material.Material;
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import com.jme3.math.ColorRGBA;
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import com.jme3.math.FastMath;
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import com.jme3.scene.Geometry;
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import com.jme3.scene.Mesh;
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import com.jme3.scene.VertexBuffer.Type;
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import com.jme3.util.BufferUtils;
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import java.nio.FloatBuffer;
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import java.nio.ShortBuffer;
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/**
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*
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* A debugging shape for a BoundingSphere
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* Consists of 3 axis aligned circles.
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*
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* @author nehon
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*/
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public class BoundingSphereDebug extends Mesh {
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protected int vertCount;
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protected int triCount;
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protected int radialSamples = 32;
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protected boolean useEvenSlices;
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protected boolean interior;
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public BoundingSphereDebug() {
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setGeometryData();
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setIndexData();
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}
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/**
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* builds the vertices based on the radius
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*/
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private void setGeometryData() {
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setMode(Mode.Lines);
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FloatBuffer posBuf = BufferUtils.createVector3Buffer((radialSamples + 1) * 3);
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FloatBuffer colBuf = BufferUtils.createVector3Buffer((radialSamples + 1) * 4);
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setBuffer(Type.Position, 3, posBuf);
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setBuffer(Type.Color, 4, colBuf);
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// generate geometry
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float fInvRS = 1.0f / radialSamples;
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// Generate points on the unit circle to be used in computing the mesh
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// points on a sphere slice.
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float[] afSin = new float[(radialSamples + 1)];
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float[] afCos = new float[(radialSamples + 1)];
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for (int iR = 0; iR < radialSamples; iR++) {
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float fAngle = FastMath.TWO_PI * fInvRS * iR;
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afCos[iR] = FastMath.cos(fAngle);
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afSin[iR] = FastMath.sin(fAngle);
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}
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afSin[radialSamples] = afSin[0];
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afCos[radialSamples] = afCos[0];
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for (int iR = 0; iR <= radialSamples; iR++) {
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posBuf.put(afCos[iR])
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.put(afSin[iR])
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.put(0);
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colBuf.put(ColorRGBA.Blue.r)
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.put(ColorRGBA.Blue.g)
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.put(ColorRGBA.Blue.b)
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.put(ColorRGBA.Blue.a);
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}
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for (int iR = 0; iR <= radialSamples; iR++) {
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posBuf.put(afCos[iR])
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.put(0)
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.put(afSin[iR]);
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colBuf.put(ColorRGBA.Green.r)
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.put(ColorRGBA.Green.g)
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.put(ColorRGBA.Green.b)
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.put(ColorRGBA.Green.a);
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}
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for (int iR = 0; iR <= radialSamples; iR++) {
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posBuf.put(0)
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.put(afCos[iR])
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.put(afSin[iR]);
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colBuf.put(ColorRGBA.Yellow.r)
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.put(ColorRGBA.Yellow.g)
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.put(ColorRGBA.Yellow.b)
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.put(ColorRGBA.Yellow.a);
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}
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updateBound();
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setStatic();
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}
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/**
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* sets the indices for rendering the sphere.
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*/
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private void setIndexData() {
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// allocate connectivity
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int nbSegments = (radialSamples) * 3;
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ShortBuffer idxBuf = BufferUtils.createShortBuffer(2 * nbSegments);
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setBuffer(Type.Index, 2, idxBuf);
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int idx = 0;
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int segDone = 0;
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while (segDone < nbSegments) {
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idxBuf.put((short) idx);
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idxBuf.put((short) (idx + 1));
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idx++;
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segDone++;
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if (segDone == radialSamples || segDone == radialSamples * 2) {
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idx++;
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}
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}
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}
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/**
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* Convenience factory method that creates a debug bounding-sphere geometry
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*
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* @param assetManager the assetManager
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* @return the bounding sphere debug geometry.
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*/
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public static Geometry createDebugSphere(AssetManager assetManager) {
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BoundingSphereDebug mesh = new BoundingSphereDebug();
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Geometry geom = new Geometry("BoundingDebug", mesh);
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Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
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mat.setBoolean("VertexColor", true);
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mat.getAdditionalRenderState().setWireframe(true);
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geom.setMaterial(mat);
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return geom;
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}
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}
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* Copyright (c) 2009-2025 jMonkeyEngine
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.jme3.environment.util;
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import com.jme3.asset.AssetManager;
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import com.jme3.material.Material;
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import com.jme3.math.ColorRGBA;
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import com.jme3.math.FastMath;
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import com.jme3.scene.Geometry;
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import com.jme3.scene.Mesh;
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import com.jme3.scene.VertexBuffer.Type;
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import com.jme3.util.BufferUtils;
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import java.nio.FloatBuffer;
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import java.nio.ShortBuffer;
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/**
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* A debugging shape for a BoundingSphere.
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* This mesh consists of three axis-aligned circles (XY, XZ, YZ planes),
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* providing a visual representation of a bounding sphere.
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*
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* @author nehon
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*/
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public class BoundingSphereDebug extends Mesh {
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protected int radialSamples = 32;
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/**
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* Constructs a new BoundingSphereDebug mesh.
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*/
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public BoundingSphereDebug() {
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setGeometryData();
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setIndexData();
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}
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/**
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* Generates and sets the position and color data for the three circles.
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* The circles are drawn in the XY (blue), XZ (green), and YZ (yellow) planes.
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*/
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private void setGeometryData() {
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setMode(Mode.Lines);
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// Each circle has radialSamples + 1 vertices (to close the loop)
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// We have 3 circles, so (radialSamples + 1) * 3 vertices in total.
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FloatBuffer posBuf = BufferUtils.createVector3Buffer((radialSamples + 1) * 3);
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FloatBuffer colBuf = BufferUtils.createVector3Buffer((radialSamples + 1) * 4);
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setBuffer(Type.Position, 3, posBuf);
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setBuffer(Type.Color, 4, colBuf);
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// generate geometry
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float fInvRS = 1.0f / radialSamples;
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// Generate points for a unit circle
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float[] sin = new float[(radialSamples + 1)];
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float[] cos = new float[(radialSamples + 1)];
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for (int i = 0; i < radialSamples; i++) {
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float fAngle = FastMath.TWO_PI * fInvRS * i;
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cos[i] = FastMath.cos(fAngle);
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sin[i] = FastMath.sin(fAngle);
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}
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// Close the loop by repeating the first point
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sin[radialSamples] = sin[0];
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cos[radialSamples] = cos[0];
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// XY Plane Circle (Blue)
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for (int i = 0; i <= radialSamples; i++) {
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addCircleData(posBuf, colBuf, cos[i], sin[i], 0, ColorRGBA.Blue);
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}
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// XZ Plane Circle (Green)
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for (int i = 0; i <= radialSamples; i++) {
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addCircleData(posBuf, colBuf, cos[i], 0, sin[i], ColorRGBA.Green);
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}
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// YZ Plane Circle (Yellow)
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for (int i = 0; i <= radialSamples; i++) {
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addCircleData(posBuf, colBuf, 0, cos[i], sin[i], ColorRGBA.Yellow);
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}
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updateBound();
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setStatic();
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}
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private void addCircleData(FloatBuffer posBuf, FloatBuffer colBuf,
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float x, float y, float z, ColorRGBA c) {
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posBuf.put(x).put(y).put(z);
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colBuf.put(c.r).put(c.g).put(c.b).put(c.a);
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}
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/**
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* Sets the index data for rendering the circles as lines.
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* Each circle is made of `radialSamples` line segments.
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*/
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private void setIndexData() {
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// allocate connectivity
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int nbSegments = (radialSamples) * 3; // 3 circles
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ShortBuffer idxBuf = BufferUtils.createShortBuffer(2 * nbSegments);
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setBuffer(Type.Index, 2, idxBuf);
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for (int c = 0; c < 3; c++) { // For each of the 3 circles
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int baseIndex = c * (radialSamples + 1);
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for (int i = 0; i < radialSamples; i++) {
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idxBuf.put((short) (baseIndex + i));
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idxBuf.put((short) (baseIndex + i + 1));
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}
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}
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}
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/**
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* Convenience factory method that creates a debug bounding-sphere geometry
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*
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* @param assetManager the assetManager
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* @return the bounding sphere debug geometry.
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*/
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public static Geometry createDebugSphere(AssetManager assetManager) {
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BoundingSphereDebug mesh = new BoundingSphereDebug();
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Geometry geom = new Geometry("BoundingDebug", mesh);
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Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
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mat.setBoolean("VertexColor", true);
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mat.getAdditionalRenderState().setWireframe(true);
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geom.setMaterial(mat);
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return geom;
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}
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}

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