/* | |
* Copyright (c) 2009-2010 jMonkeyEngine | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions are | |
* met: | |
* | |
* * Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* | |
* * Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* | |
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors | |
* may be used to endorse or promote products derived from this software | |
* without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
package com.jme3.util; | |
import com.jme3.collision.bih.BIHNode.BIHStackData; | |
import com.jme3.math.*; | |
import com.jme3.scene.Spatial; | |
import java.nio.FloatBuffer; | |
import java.nio.IntBuffer; | |
import java.util.ArrayList; | |
/** | |
* Temporary variables assigned to each thread. Engine classes may access | |
* these temp variables with TempVars.get(), all retrieved TempVars | |
* instances must be returned via TempVars.release(). | |
* This returns an available instance of the TempVar class ensuring this | |
* particular instance is never used elsewhere in the mean time. | |
*/ | |
public class TempVars { | |
/** | |
* Allow X instances of TempVars in a single thread. | |
*/ | |
private static final int STACK_SIZE = 5; | |
/** | |
* <code>TempVarsStack</code> contains a stack of TempVars. | |
* Every time TempVars.get() is called, a new entry is added to the stack, | |
* and the index incremented. | |
* When TempVars.release() is called, the entry is checked against | |
* the current instance and then the index is decremented. | |
*/ | |
private static class TempVarsStack { | |
int index = 0; | |
TempVars[] tempVars = new TempVars[STACK_SIZE]; | |
} | |
/** | |
* ThreadLocal to store a TempVarsStack for each thread. | |
* This ensures each thread has a single TempVarsStack that is | |
* used only in method calls in that thread. | |
*/ | |
private static final ThreadLocal<TempVarsStack> varsLocal = new ThreadLocal<TempVarsStack>() { | |
@Override | |
public TempVarsStack initialValue() { | |
return new TempVarsStack(); | |
} | |
}; | |
/** | |
* This instance of TempVars has been retrieved but not released yet. | |
*/ | |
private boolean isUsed = false; | |
private TempVars() { | |
} | |
/** | |
* Acquire an instance of the TempVar class. | |
* You have to release the instance after use by calling the | |
* release() method. | |
* If more than STACK_SIZE (currently 5) instances are requested | |
* in a single thread then an ArrayIndexOutOfBoundsException will be thrown. | |
* | |
* @return A TempVar instance | |
*/ | |
public static TempVars get() { | |
TempVarsStack stack = varsLocal.get(); | |
TempVars instance = stack.tempVars[stack.index]; | |
if (instance == null) { | |
// Create new | |
instance = new TempVars(); | |
// Put it in there | |
stack.tempVars[stack.index] = instance; | |
} | |
stack.index++; | |
instance.isUsed = true; | |
return instance; | |
} | |
/** | |
* Releases this instance of TempVars. | |
* Once released, the contents of the TempVars are undefined. | |
* The TempVars must be released in the opposite order that they are retrieved, | |
* e.g. Acquiring vars1, then acquiring vars2, vars2 MUST be released | |
* first otherwise an exception will be thrown. | |
*/ | |
public void release() { | |
if (!isUsed) { | |
throw new IllegalStateException("This instance of TempVars was already released!"); | |
} | |
isUsed = false; | |
TempVarsStack stack = varsLocal.get(); | |
// Return it to the stack | |
stack.index--; | |
// Check if it is actually there | |
if (stack.tempVars[stack.index] != this) { | |
throw new IllegalStateException("An instance of TempVars has not been released in a called method!"); | |
} | |
} | |
/** | |
* For interfacing with OpenGL in Renderer. | |
*/ | |
public final IntBuffer intBuffer1 = BufferUtils.createIntBuffer(1); | |
public final IntBuffer intBuffer16 = BufferUtils.createIntBuffer(16); | |
public final FloatBuffer floatBuffer16 = BufferUtils.createFloatBuffer(16); | |
/** | |
* Skinning buffers | |
*/ | |
public final float[] skinPositions = new float[512 * 3]; | |
public final float[] skinNormals = new float[512 * 3]; | |
//tangent buffer as 4 components by elements | |
public final float[] skinTangents = new float[512 * 4]; | |
/** | |
* Fetching triangle from mesh | |
*/ | |
public final Triangle triangle = new Triangle(); | |
/** | |
* Color | |
*/ | |
public final ColorRGBA color = new ColorRGBA(); | |
/** | |
* General vectors. | |
*/ | |
public final Vector3f vect1 = new Vector3f(); | |
public final Vector3f vect2 = new Vector3f(); | |
public final Vector3f vect3 = new Vector3f(); | |
public final Vector3f vect4 = new Vector3f(); | |
public final Vector3f vect5 = new Vector3f(); | |
public final Vector3f vect6 = new Vector3f(); | |
public final Vector3f vect7 = new Vector3f(); | |
//seems the maximum number of vector used is 7 in com.jme3.bounding.java | |
public final Vector3f vect8 = new Vector3f(); | |
public final Vector3f vect9 = new Vector3f(); | |
public final Vector3f vect10 = new Vector3f(); | |
public final Vector4f vect4f = new Vector4f(); | |
public final Vector3f[] tri = {new Vector3f(), | |
new Vector3f(), | |
new Vector3f()}; | |
/** | |
* 2D vector | |
*/ | |
public final Vector2f vect2d = new Vector2f(); | |
public final Vector2f vect2d2 = new Vector2f(); | |
/** | |
* General matrices. | |
*/ | |
public final Matrix3f tempMat3 = new Matrix3f(); | |
public final Matrix4f tempMat4 = new Matrix4f(); | |
public final Matrix4f tempMat42 = new Matrix4f(); | |
/** | |
* General quaternions. | |
*/ | |
public final Quaternion quat1 = new Quaternion(); | |
public final Quaternion quat2 = new Quaternion(); | |
/** | |
* Eigen | |
*/ | |
public final Eigen3f eigen = new Eigen3f(); | |
/** | |
* Plane | |
*/ | |
public final Plane plane = new Plane(); | |
/** | |
* BoundingBox ray collision | |
*/ | |
public final float[] fWdU = new float[3]; | |
public final float[] fAWdU = new float[3]; | |
public final float[] fDdU = new float[3]; | |
public final float[] fADdU = new float[3]; | |
public final float[] fAWxDdU = new float[3]; | |
/** | |
* Maximum tree depth .. 32 levels?? | |
*/ | |
public final Spatial[] spatialStack = new Spatial[32]; | |
public final float[] matrixWrite = new float[16]; | |
/** | |
* BIHTree | |
*/ | |
public final float[] bihSwapTmp = new float[9]; | |
public final ArrayList<BIHStackData> bihStack = new ArrayList<BIHStackData>(); | |
} |