com.badlogic.gdx.physics.box2d.Manifold Maven / Gradle / Ivy
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/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.badlogic.gdx.physics.box2d;
import com.badlogic.gdx.math.Vector2;
public class Manifold {
/*JNI
#include
*/
long addr;
final ManifoldPoint[] points = new ManifoldPoint[] {new ManifoldPoint(), new ManifoldPoint()};
final Vector2 localNormal = new Vector2();
final Vector2 localPoint = new Vector2();
final int[] tmpInt = new int[2];
final float[] tmpFloat = new float[4];
protected Manifold (long addr) {
this.addr = addr;
}
public ManifoldType getType () {
int type = jniGetType(addr);
if (type == 0) return ManifoldType.Circle;
if (type == 1) return ManifoldType.FaceA;
if (type == 2) return ManifoldType.FaceB;
return ManifoldType.Circle;
}
private native int jniGetType (long addr); /*
b2Manifold* manifold = (b2Manifold*)addr;
return manifold->type;
*/
public int getPointCount () {
return jniGetPointCount(addr);
}
private native int jniGetPointCount (long addr); /*
b2Manifold* manifold = (b2Manifold*)addr;
return manifold->pointCount;
*/
public Vector2 getLocalNormal () {
jniGetLocalNormal(addr, tmpFloat);
localNormal.set(tmpFloat[0], tmpFloat[1]);
return localNormal;
}
private native void jniGetLocalNormal (long addr, float[] values); /*
b2Manifold* manifold = (b2Manifold*)addr;
values[0] = manifold->localNormal.x;
values[1] = manifold->localNormal.y;
*/
public Vector2 getLocalPoint () {
jniGetLocalPoint(addr, tmpFloat);
localPoint.set(tmpFloat[0], tmpFloat[1]);
return localPoint;
}
private native void jniGetLocalPoint (long addr, float[] values); /*
b2Manifold* manifold = (b2Manifold*)addr;
values[0] = manifold->localPoint.x;
values[1] = manifold->localPoint.y;
*/
public ManifoldPoint[] getPoints () {
int count = jniGetPointCount(addr);
for (int i = 0; i < count; i++) {
int contactID = jniGetPoint(addr, tmpFloat, i);
ManifoldPoint point = points[i];
point.contactID = contactID;
point.localPoint.set(tmpFloat[0], tmpFloat[1]);
point.normalImpulse = tmpFloat[2];
point.tangentImpulse = tmpFloat[3];
}
return points;
}
private native int jniGetPoint (long addr, float[] values, int idx); /*
b2Manifold* manifold = (b2Manifold*)addr;
values[0] = manifold->points[idx].localPoint.x;
values[1] = manifold->points[idx].localPoint.y;
values[2] = manifold->points[idx].normalImpulse;
values[3] = manifold->points[idx].tangentImpulse;
return (jint)manifold->points[idx].id.key;
*/
public class ManifoldPoint {
public final Vector2 localPoint = new Vector2();
public float normalImpulse;
public float tangentImpulse;
public int contactID = 0;
public String toString () {
return "id: " + contactID + ", " + localPoint + ", " + normalImpulse + ", " + tangentImpulse;
}
}
public enum ManifoldType {
Circle, FaceA, FaceB
}
}
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