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package jme3test.bullet;

import com.jme3.app.SimpleApplication;
import com.jme3.bullet.BulletAppState;
import com.jme3.bullet.control.KinematicRagdollControl;
import com.jme3.scene.Geometry;
import com.jme3.scene.Mesh;
import com.jme3.scene.Node;
import com.jme3.scene.VertexBuffer;
import java.nio.ByteBuffer;

/**
 * Test case for JME issue #1004: RagdollUtils can't handle 16-bit bone indices.
 * <p>
 * If successful, no exception will be thrown.
 */
public class TestIssue1004 extends SimpleApplication {
    // *************************************************************************
    // new methods exposed

    public static void main(String[] args) {
        TestIssue1004 app = new TestIssue1004();
        app.start();
    }
    // *************************************************************************
    // SimpleApplication methods

    @Override
    public void simpleInitApp() {
        BulletAppState bulletAppState = new BulletAppState();
        stateManager.attach(bulletAppState);
        String sinbadPath = "Models/Sinbad/Sinbad.mesh.xml";
        Node sinbad = (Node) assetManager.loadModel(sinbadPath);

        Geometry geometry = (Geometry) sinbad.getChild(0);
        Mesh mesh = geometry.getMesh();
        VertexBuffer.Type bufferType = VertexBuffer.Type.BoneIndex;
        VertexBuffer vertexBuffer = mesh.getBuffer(bufferType);

        // Remove the existing bone-index buffer.
        mesh.getBufferList().remove(vertexBuffer);
        mesh.getBuffers().remove(bufferType.ordinal());

        // Copy the 8-bit bone indices to 16-bit indices.
        ByteBuffer oldBuffer = (ByteBuffer) vertexBuffer.getDataReadOnly();
        int numComponents = oldBuffer.limit();
        oldBuffer.rewind();
        short[] shortArray = new short[numComponents];
        for (int index = 0; oldBuffer.hasRemaining(); ++index) {
            shortArray[index] = oldBuffer.get();
        }

        // Add the 16-bit bone indices to the mesh.
        mesh.setBuffer(bufferType, 4, shortArray);

        KinematicRagdollControl ragdoll = new KinematicRagdollControl(0.5f);
        sinbad.addControl(ragdoll);

        stop();
    }
}