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package com.jme3.scene.plugins.blender.constraints;
import com.jme3.animation.Animation;
import com.jme3.math.Matrix4f;
import com.jme3.math.Vector3f;
import com.jme3.scene.Spatial;
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 'Dist limit' constraint type in blender.
* @author Marcin Roguski (Kaelthas)
*/
/*package*/ class ConstraintDistLimit extends Constraint {
private static final int LIMITDIST_INSIDE = 0;
private static final int LIMITDIST_OUTSIDE = 1;
private static final int LIMITDIST_ONSURFACE = 2;
protected int mode;
protected float dist;
/**
* 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 ConstraintDistLimit(Structure constraintStructure, Long ownerOMA,
Ipo influenceIpo, BlenderContext blenderContext) throws BlenderFileException {
super(constraintStructure, ownerOMA, influenceIpo, blenderContext);
mode = ((Number) data.getFieldValue("mode")).intValue();
dist = ((Number) data.getFieldValue("dist")).floatValue();
}
@Override
protected void bakeConstraint() {
Object owner = this.owner.getObject();
AnimData animData = blenderContext.getAnimData(this.owner.getOma());
if(animData != null) {
if(owner instanceof Spatial) {
Vector3f targetLocation = ((Spatial) owner).getWorldTranslation();
for(Animation animation : animData.anims) {
BlenderTrack blenderTrack = this.getTrack(owner, animData.skeleton, animation);
int maxFrames = blenderTrack.getTimes().length;
Vector3f[] translations = blenderTrack.getTranslations();
for (int frame = 0; frame < maxFrames; ++frame) {
Vector3f v = translations[frame].subtract(targetLocation);
this.distLimit(v, targetLocation, ipo.calculateValue(frame));
translations[frame].addLocal(v);
}
blenderTrack.setKeyframes(blenderTrack.getTimes(), translations, blenderTrack.getRotations(), blenderTrack.getScales());
}
}
}
// apply static constraint only to spatials
if(owner instanceof Spatial) {
Matrix4f targetWorldMatrix = target.getWorldTransformMatrix();
Vector3f targetLocation = targetWorldMatrix.toTranslationVector();
Matrix4f m = this.owner.getParentWorldTransformMatrix();
m.invertLocal();
Matrix4f ownerWorldMatrix = this.owner.getWorldTransformMatrix();
Vector3f ownerLocation = ownerWorldMatrix.toTranslationVector();
this.distLimit(ownerLocation, targetLocation, ipo.calculateValue(0));
((Spatial) owner).setLocalTranslation(m.mult(ownerLocation));
}
}
/**
*
* @param currentLocation
* @param targetLocation
* @param influence
*/
private void distLimit(Vector3f currentLocation, Vector3f targetLocation, float influence) {
Vector3f v = currentLocation.subtract(targetLocation);
float currentDistance = v.length();
switch (mode) {
case LIMITDIST_INSIDE:
if (currentDistance >= dist) {
v.normalizeLocal();
v.multLocal(dist + (currentDistance - dist) * (1.0f - influence));
currentLocation.set(v.addLocal(targetLocation));
}
break;
case LIMITDIST_ONSURFACE:
if (currentDistance > dist) {
v.normalizeLocal();
v.multLocal(dist + (currentDistance - dist) * (1.0f - influence));
currentLocation.set(v.addLocal(targetLocation));
} else if(currentDistance < dist) {
v.normalizeLocal().multLocal(dist * influence);
currentLocation.set(targetLocation.add(v));
}
break;
case LIMITDIST_OUTSIDE:
if (currentDistance <= dist) {
v = targetLocation.subtract(currentLocation).normalizeLocal().multLocal(dist * influence);
currentLocation.set(targetLocation.add(v));
}
break;
default:
throw new IllegalStateException("Unknown distance limit constraint mode: " + mode);
}
}
}
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