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package com.jme3.scene.plugins.blender.constraints;
import java.nio.FloatBuffer;
import java.util.ArrayList;
import java.util.List;
import com.jme3.animation.Animation;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector3f;
import com.jme3.scene.Geometry;
import com.jme3.scene.Mesh;
import com.jme3.scene.Node;
import com.jme3.scene.Spatial;
import com.jme3.scene.VertexBuffer.Type;
import com.jme3.scene.plugins.blender.BlenderContext;
import com.jme3.scene.plugins.blender.animations.Ipo;
import com.jme3.scene.plugins.blender.exceptions.BlenderFileException;
import com.jme3.scene.plugins.blender.file.Structure;
import com.jme3.scene.plugins.ogre.AnimData;
/**
* This class represents 'Shrink wrap' constraint type in blender.
* @author Marcin Roguski (Kaelthas)
*/
/*package*/ class ConstraintShrinkWrap extends Constraint {
/**
* This constructor creates the constraint instance.
*
* @param constraintStructure
* the constraint's structure (bConstraint clss in blender 2.49).
* @param ownerOMA
* the old memory address of the constraint owner
* @param influenceIpo
* the ipo curve of the influence factor
* @param blenderContext
* the blender context
* @throws BlenderFileException
* this exception is thrown when the blender file is somehow
* corrupted
*/
public ConstraintShrinkWrap(Structure constraintStructure, Long ownerOMA,
Ipo influenceIpo, BlenderContext blenderContext) throws BlenderFileException {
super(constraintStructure, ownerOMA, influenceIpo, blenderContext);
}
@Override
protected void bakeConstraint() {
//loading mesh points (blender ensures that the target is a mesh-object)
List<Vector3f> pts = new ArrayList<Vector3f>();
Node target = (Node) this.target.getObject();
for(Spatial spatial : target.getChildren()) {
if(spatial instanceof Geometry) {
Mesh mesh = ((Geometry) spatial).getMesh();
FloatBuffer floatBuffer = mesh.getFloatBuffer(Type.Position);
for(int i=0;i<floatBuffer.limit();i+=3) {
pts.add(new Vector3f(floatBuffer.get(i), floatBuffer.get(i + 1), floatBuffer.get(i + 2)));
}
}
}
AnimData animData = blenderContext.getAnimData(this.owner.getOma());
if(animData != null) {
Object owner = this.owner.getObject();
for(Animation animation : animData.anims) {
BlenderTrack track = this.getTrack(owner, animData.skeleton, animation);
Vector3f[] translations = track.getTranslations();
Quaternion[] rotations = track.getRotations();
int maxFrames = translations.length;
for (int frame = 0; frame < maxFrames; ++frame) {
Vector3f currentTranslation = translations[frame];
//looking for minimum distanced point
Vector3f minDistancePoint = null;
float distance = Float.MAX_VALUE;
for(Vector3f p : pts) {
float temp = currentTranslation.distance(p);
if(temp < distance) {
distance = temp;
minDistancePoint = p;
}
}
translations[frame] = minDistancePoint.clone();
}
track.setKeyframes(track.getTimes(), translations, rotations, track.getScales());
}
}
//TODO: static constraint for spatials
}
}
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