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* Copyright (c) 2009-2015 jMonkeyEngine
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package com.jme3.light;
import com.jme3.math.Vector3f;
import com.jme3.scene.Geometry;
import com.jme3.scene.Mesh;
import com.jme3.scene.Node;
import org.junit.Test;
/**
* Test light sorting (in the scene graph) for various light types.
*
* @author Kirill Vainer
*/
public class LightSortTest {
@Test
public void testSimpleSort() {
Geometry g = new Geometry("test", new Mesh());
LightList list = new LightList(g);
list.add(new SpotLight(Vector3f.ZERO, Vector3f.UNIT_X));
list.add(new PointLight(Vector3f.UNIT_X));
list.add(new DirectionalLight(Vector3f.UNIT_X));
list.add(new AmbientLight());
list.sort(true);
assert list.get(0) instanceof AmbientLight; // Ambients always first
assert list.get(1) instanceof DirectionalLight; // .. then directionals
assert list.get(2) instanceof SpotLight; // Spot is 0 units away from geom
assert list.get(3) instanceof PointLight; // .. and point is 1 unit away.
}
@Test
public void testSceneGraphSort() {
Node n = new Node("node");
Geometry g = new Geometry("geom", new Mesh());
SpotLight spot = new SpotLight(Vector3f.ZERO, Vector3f.UNIT_X);
PointLight point = new PointLight(Vector3f.UNIT_X);
DirectionalLight directional = new DirectionalLight(Vector3f.UNIT_X);
AmbientLight ambient = new AmbientLight();
// Some lights are on the node
n.addLight(spot);
n.addLight(point);
// .. and some on the geometry.
g.addLight(directional);
g.addLight(ambient);
n.attachChild(g);
n.updateGeometricState();
LightList list = g.getWorldLightList();
// check the sorting (when geom is at 0,0,0)
assert list.get(0) instanceof AmbientLight;
assert list.get(1) instanceof DirectionalLight;
assert list.get(2) instanceof SpotLight;
assert list.get(3) instanceof PointLight;
// move the geometry closer to the point light
g.setLocalTranslation(Vector3f.UNIT_X);
n.updateGeometricState();
assert list.get(0) instanceof AmbientLight;
assert list.get(1) instanceof DirectionalLight;
assert list.get(2) instanceof PointLight;
assert list.get(3) instanceof SpotLight;
// now move the point light away from the geometry
// and the spot light closer
// XXX: doesn't work! jME can't detect that the light moved!
// point.setPosition(Vector3f.ZERO);
// spot.setPosition(Vector3f.UNIT_X);
// n.updateGeometricState();
//
// assert list.get(0) instanceof AmbientLight;
// assert list.get(1) instanceof DirectionalLight;
// assert list.get(2) instanceof SpotLight;
// assert list.get(3) instanceof PointLight;
}
}