package com.jme3.scene.plugins.blender.constraints.definitions;
import com.jme3.animation.Bone;
import com.jme3.math.Transform;
import com.jme3.math.Vector3f;
import com.jme3.scene.plugins.blender.BlenderContext;
import com.jme3.scene.plugins.blender.animations.BoneContext;
import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
import com.jme3.scene.plugins.blender.file.Structure;
/**
* This class represents 'Dist limit' constraint type in blender.
*
* @author Marcin Roguski (Kaelthas)
*/
/* package */class ConstraintDefinitionDistLimit extends ConstraintDefinition {
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;
public ConstraintDefinitionDistLimit(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
super(constraintData, ownerOMA, blenderContext);
mode = ((Number) constraintData.getFieldValue("mode")).intValue();
dist = ((Number) constraintData.getFieldValue("dist")).floatValue();
}
@Override
public void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence) {
if (this.getOwner() instanceof Bone && ((Bone) this.getOwner()).getParent() != null && blenderContext.getBoneContext(ownerOMA).is(BoneContext.CONNECTED_TO_PARENT)) {
// distance limit does not work on bones who are connected to their parent
return;
}
if (influence == 0 || targetTransform == null) {
return;// no need to do anything
}
Transform ownerTransform = this.getOwnerTransform(ownerSpace);
Vector3f v = ownerTransform.getTranslation().subtract(targetTransform.getTranslation());
float currentDistance = v.length();
switch (mode) {
case LIMITDIST_INSIDE:
if (currentDistance >= dist) {
v.normalizeLocal();
v.multLocal(dist + (currentDistance - dist) * (1.0f - influence));
ownerTransform.getTranslation().set(v.addLocal(targetTransform.getTranslation()));
}
break;
case LIMITDIST_ONSURFACE:
if (currentDistance > dist) {
v.normalizeLocal();
v.multLocal(dist + (currentDistance - dist) * (1.0f - influence));
ownerTransform.getTranslation().set(v.addLocal(targetTransform.getTranslation()));
} else if (currentDistance < dist) {
v.normalizeLocal().multLocal(dist * influence);
ownerTransform.getTranslation().set(targetTransform.getTranslation().add(v));
}
break;
case LIMITDIST_OUTSIDE:
if (currentDistance <= dist) {
v = targetTransform.getTranslation().subtract(ownerTransform.getTranslation()).normalizeLocal().multLocal(dist * influence);
ownerTransform.getTranslation().set(targetTransform.getTranslation().add(v));
}
break;
default:
throw new IllegalStateException("Unknown distance limit constraint mode: " + mode);
}
this.applyOwnerTransform(ownerTransform, ownerSpace);
}
@Override
public boolean isTargetRequired() {
return true;
}
@Override
public String getConstraintTypeName() {
return "Limit distance";
}
}