Small tweaks, spelling, unnecessary checks, etc.

1 files changed, 1 insertions, 1 deletions

diff --git a/ardor3d-examples/src/main/java/com/ardor3d/example/effect/ParallelSplitShadowMapExample.java b/ardor3d-examples/src/main/java/com/ardor3d/example/effect/ParallelSplitShadowMapExample.java
index 6c7f15e..5020f5c 100644
--- a/ardor3d-examples/src/main/java/com/ardor3d/example/effect/ParallelSplitShadowMapExample.java
+++ b/ardor3d-examples/src/main/java/com/ardor3d/example/effect/ParallelSplitShadowMapExample.java
@@ -1 +1 @@
-/**
 * Copyright (c) 2008-2012 Ardor Labs, Inc.
 *
 * This file is part of Ardor3D.
 *
 * Ardor3D is free software: you can redistribute it and/or modify it 
 * under the terms of its license which may be found in the accompanying
 * LICENSE file or at <http://www.ardor3d.com/LICENSE>.
 */

package com.ardor3d.example.effect;

import com.ardor3d.bounding.BoundingBox;
import com.ardor3d.example.ExampleBase;
import com.ardor3d.example.Purpose;
import com.ardor3d.extension.shadow.map.ParallelSplitShadowMapPass;
import com.ardor3d.framework.Canvas;
import com.ardor3d.image.Texture;
import com.ardor3d.image.Texture2D;
import com.ardor3d.input.Key;
import com.ardor3d.input.logical.InputTrigger;
import com.ardor3d.input.logical.KeyPressedCondition;
import com.ardor3d.input.logical.TriggerAction;
import com.ardor3d.input.logical.TwoInputStates;
import com.ardor3d.light.DirectionalLight;
import com.ardor3d.light.Light;
import com.ardor3d.light.PointLight;
import com.ardor3d.math.Matrix3;
import com.ardor3d.math.Vector3;
import com.ardor3d.renderer.Renderer;
import com.ardor3d.renderer.pass.BasicPassManager;
import com.ardor3d.renderer.pass.RenderPass;
import com.ardor3d.renderer.queue.RenderBucketType;
import com.ardor3d.renderer.state.BlendState;
import com.ardor3d.renderer.state.BlendState.TestFunction;
import com.ardor3d.renderer.state.CullState;
import com.ardor3d.renderer.state.MaterialState;
import com.ardor3d.renderer.state.MaterialState.ColorMaterial;
import com.ardor3d.renderer.state.TextureState;
import com.ardor3d.scenegraph.Node;
import com.ardor3d.scenegraph.Spatial;
import com.ardor3d.scenegraph.controller.SpatialController;
import com.ardor3d.scenegraph.hint.CullHint;
import com.ardor3d.scenegraph.hint.LightCombineMode;
import com.ardor3d.scenegraph.hint.TextureCombineMode;
import com.ardor3d.scenegraph.shape.Box;
import com.ardor3d.scenegraph.shape.Quad;
import com.ardor3d.scenegraph.shape.Torus;
import com.ardor3d.scenegraph.visitor.UpdateModelBoundVisitor;
import com.ardor3d.ui.text.BasicText;
import com.ardor3d.util.ReadOnlyTimer;
import com.ardor3d.util.TextureManager;

/**
 * Example showing the parallel split shadow mapping technique. Requires GLSL support.
 */
@Purpose(htmlDescriptionKey = "com.ardor3d.example.effect.ParallelSplitShadowMapExample", //
thumbnailPath = "com/ardor3d/example/media/thumbnails/effect_ParallelSplitShadowMapExample.jpg", //
maxHeapMemory = 64)
public class ParallelSplitShadowMapExample extends ExampleBase {

    /** Pssm shadow map pass. */
    private ParallelSplitShadowMapPass _pssmPass;

    /** Pass manager. */
    private BasicPassManager _passManager;

    /** Quads used for debug showing shadowmaps. */
    private Quad _orthoQuad[];

    /** Flag for turning on/off light movement. */
    private boolean _updateLight = false;

    /** Temp vec for updating light pos. */
    private final Vector3 lightPosition = new Vector3(10000, 5000, 10000);

    /** Text fields used to present info about the example. */
    private final BasicText _exampleInfo[] = new BasicText[12];

    /** Flag to make sure quads are updated on reinitialization of shadow renderer */
    private boolean _quadsDirty = true;

    /** Console fps output */
    private double counter = 0;
    private int frames = 0;

    /**
     * The main method.
     * 
     * @param args
     *            the arguments
     */
    public static void main(final String[] args) {
        start(ParallelSplitShadowMapExample.class);
    }

    /**
     * Update the PassManager and light.
     * 
     * @param timer
     *            the application timer
     */
    @Override
    protected void updateExample(final ReadOnlyTimer timer) {
        _passManager.updatePasses(timer.getTimePerFrame());

        if (_updateLight) {
            final double time = timer.getTimeInSeconds() * 0.2;
            lightPosition.set(Math.sin(time) * 10000.0, 5000.0, Math.cos(time) * 10000.0);
        }

        counter += timer.getTimePerFrame();
        frames++;
        if (counter > 1) {
            final double fps = (frames / counter);
            counter = 0;
            frames = 0;
            System.out.printf("%7.1f FPS\n", fps);
        }
    }

    /**
     * Initialize pssm if needed. Update light position. Render scene.
     * 
     * @param renderer
     *            the renderer
     */
    @Override
    protected void renderExample(final Renderer renderer) {
        if (!_pssmPass.isInitialised()) {
            _pssmPass.init(renderer);
        }
        updateQuadTextures(renderer);

        // Update the shadowpass "light" position. Iow it's camera.
        final Light light = _lightState.get(0);
        if (light instanceof PointLight) {
            ((PointLight) light).setLocation(lightPosition);
        } else if (light instanceof DirectionalLight) {
            ((DirectionalLight) light).setDirection(lightPosition.normalize(null).negateLocal());
        }

        _passManager.renderPasses(renderer);
    }

    /**
     * Initialize pssm pass and scene.
     */
    @Override
    protected void initExample() {
        // Setup main camera.
        _canvas.setTitle("Parallel Split Shadow Maps - Example");
        _canvas.getCanvasRenderer().getCamera().setLocation(new Vector3(250, 200, -250));
        _canvas.getCanvasRenderer()
                .getCamera()
                .setFrustumPerspective(
                        45.0,
                        (float) _canvas.getCanvasRenderer().getCamera().getWidth()
                                / (float) _canvas.getCanvasRenderer().getCamera().getHeight(), 1.0, 10000);
        _canvas.getCanvasRenderer().getCamera().lookAt(new Vector3(0, 0, 0), Vector3.UNIT_Y);

        _controlHandle.setMoveSpeed(200);

        // Setup some standard states for the scene.
        final CullState cullFrontFace = new CullState();
        cullFrontFace.setEnabled(true);
        cullFrontFace.setCullFace(CullState.Face.Back);
        _root.setRenderState(cullFrontFace);

        final TextureState ts = new TextureState();
        ts.setEnabled(true);
        ts.setTexture(TextureManager.load("images/ardor3d_white_256.jpg", Texture.MinificationFilter.Trilinear, true));
        _root.setRenderState(ts);

        final MaterialState ms = new MaterialState();
        ms.setColorMaterial(ColorMaterial.Diffuse);
        _root.setRenderState(ms);

        _passManager = new BasicPassManager();

        // setup some quads for debug viewing.
        final RenderPass renderPass = new RenderPass();
        final int quadSize = _canvas.getCanvasRenderer().getCamera().getWidth() / 10;
        _orthoQuad = new Quad[ParallelSplitShadowMapPass._MAX_SPLITS];
        for (int i = 0; i < ParallelSplitShadowMapPass._MAX_SPLITS; i++) {
            _orthoQuad[i] = new Quad("OrthoQuad", quadSize, quadSize);
            _orthoQuad[i].setTranslation(new Vector3((quadSize / 2 + 5) + (quadSize + 5) * i, (quadSize / 2 + 5), 1));
            _orthoQuad[i].getSceneHints().setRenderBucketType(RenderBucketType.Ortho);
            _orthoQuad[i].getSceneHints().setLightCombineMode(LightCombineMode.Off);
            _orthoQuad[i].getSceneHints().setTextureCombineMode(TextureCombineMode.Replace);
            _orthoQuad[i].getSceneHints().setCullHint(CullHint.Never);
            renderPass.add(_orthoQuad[i]);
        }

        // Create scene objects.
        setupTerrain();

        final RenderPass rootPass = new RenderPass();
        rootPass.add(_root);

        _lightState.detachAll();
        final DirectionalLight light = new DirectionalLight();
        // final PointLight light = new PointLight();
        light.setEnabled(true);
        _lightState.attach(light);

        // Create pssm pass
        _pssmPass = new ParallelSplitShadowMapPass(light, 1024, 3);
        _pssmPass.add(_root);
        _pssmPass.setUseSceneTexturing(true);
        _pssmPass.setUseObjectCullFace(true);

        final Node occluders = setupOccluders();
        _pssmPass.addOccluder(occluders);

        // Populate passmanager with passes.
        _passManager.add(rootPass);
        _passManager.add(_pssmPass);
        _passManager.add(renderPass);

        // Setyp textfields for presenting example info.
        final Node textNodes = new Node("Text");
        renderPass.add(textNodes);
        textNodes.getSceneHints().setRenderBucketType(RenderBucketType.Ortho);
        textNodes.getSceneHints().setLightCombineMode(LightCombineMode.Off);

        final double infoStartY = _canvas.getCanvasRenderer().getCamera().getHeight();
        for (int i = 0; i < _exampleInfo.length; i++) {
            _exampleInfo[i] = BasicText.createDefaultTextLabel("Text", "", 16);
            _exampleInfo[i].setTranslation(new Vector3(10, infoStartY - (i + 1) * 20, 0));
            textNodes.attachChild(_exampleInfo[i]);
        }

        textNodes.updateGeometricState(0.0);
        updateText();

        // Register keyboard triggers for manipulating example
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.ZERO), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setDrawShaderDebug(!_pssmPass.isDrawShaderDebug());
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.ONE), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _updateLight = !_updateLight;
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.TWO), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setUpdateMainCamera(!_pssmPass.isUpdateMainCamera());
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.THREE), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setDrawDebug(!_pssmPass.isDrawDebug());
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.FOUR), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                if (_pssmPass.getNumOfSplits() > ParallelSplitShadowMapPass._MIN_SPLITS) {
                    _pssmPass.setNumOfSplits(_pssmPass.getNumOfSplits() - 1);
                    updateText();
                    _quadsDirty = true;
                }
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.FIVE), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                if (_pssmPass.getNumOfSplits() < ParallelSplitShadowMapPass._MAX_SPLITS) {
                    _pssmPass.setNumOfSplits(_pssmPass.getNumOfSplits() + 1);
                    updateText();
                    _quadsDirty = true;
                }
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.SIX), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                if (_pssmPass.getShadowMapSize() > 1) {
                    _pssmPass.setShadowMapSize(_pssmPass.getShadowMapSize() / 2);
                    updateText();
                    _quadsDirty = true;
                }
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.SEVEN), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                if (_pssmPass.getShadowMapSize() < 2048) {
                    _pssmPass.setShadowMapSize(_pssmPass.getShadowMapSize() * 2);
                    updateText();
                    _quadsDirty = true;
                }
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.EIGHT), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                final double maxShadowDistance = _pssmPass.getMaxShadowDistance();
                if (maxShadowDistance > 200.0) {
                    _pssmPass.setMaxShadowDistance(maxShadowDistance - 100.0);
                    updateText();
                }
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.NINE), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                final double maxShadowDistance = _pssmPass.getMaxShadowDistance();
                _pssmPass.setMaxShadowDistance(maxShadowDistance + 100.0);
                updateText();
            }
        }));

        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.U), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setNumOfSplits(1);
                _pssmPass.setShadowMapSize(1024);
                updateText();
                _quadsDirty = true;
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.I), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setNumOfSplits(3);
                _pssmPass.setShadowMapSize(512);
                updateText();
                _quadsDirty = true;
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.J), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setUseSceneTexturing(!_pssmPass.isUseSceneTexturing());
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.K), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setUseObjectCullFace(!_pssmPass.isUseObjectCullFace());
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.SPACE), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setEnabled(!_pssmPass.isEnabled());
                updateText();
                _quadsDirty = true;
            }
        }));

        // Make sure all boundings are updated.
        _root.acceptVisitor(new UpdateModelBoundVisitor(), false);
    }

    /**
     * Setup debug quads to render pssm shadowmaps.
     */
    private void updateQuadTextures(final Renderer r) {
        if (!_quadsDirty) {
            return;
        }
        _quadsDirty = false;

        _pssmPass.reinit(r);
        for (int i = 0; i < _pssmPass.getNumOfSplits(); i++) {
            final TextureState screen = new TextureState();
            final Texture2D copy = new Texture2D();
            copy.setTextureKey(_pssmPass.getShadowMapTexture(i).getTextureKey());
            screen.setTexture(copy);
            _orthoQuad[i].setRenderState(screen);
            _orthoQuad[i].getSceneHints().setCullHint(CullHint.Never);
            _orthoQuad[i].updateGeometricState(0.0);
        }
        for (int i = _pssmPass.getNumOfSplits(); i < ParallelSplitShadowMapPass._MAX_SPLITS; i++) {
            _orthoQuad[i].getSceneHints().setCullHint(CullHint.Always);
        }
    }

    /**
     * Update text information.
     */
    private void updateText() {
        _exampleInfo[0].setText("[0] Debug shader draw: " + _pssmPass.isDrawShaderDebug());
        _exampleInfo[1].setText("[1] Update light: " + _updateLight);
        _exampleInfo[2].setText("[2] Update main camera: " + _pssmPass.isUpdateMainCamera());
        _exampleInfo[3].setText("[3] Debug draw: " + _pssmPass.isDrawDebug());
        _exampleInfo[4].setText("[4/5] Number of splits: " + _pssmPass.getNumOfSplits());
        _exampleInfo[5].setText("[6/7] Shadow map size: " + _pssmPass.getShadowMapSize());
        _exampleInfo[6].setText("[8/9] Max shadow distance: " + _pssmPass.getMaxShadowDistance());
        _exampleInfo[7].setText("[U] Setup 1 split of size 1024");
        _exampleInfo[8].setText("[I] Setup 3 splits of size 512");
        _exampleInfo[9].setText("[J] Use scene texturing: " + _pssmPass.isUseSceneTexturing());
        _exampleInfo[10].setText("[K] Use object cull face: " + _pssmPass.isUseObjectCullFace());
        _exampleInfo[11].setText("[SPACE] toggle PSSM pass: " + (_pssmPass.isEnabled() ? "enabled" : "disabled"));
    }

    /**
     * Setup terrain.
     */
    private void setupTerrain() {
        final Box box = new Box("box", new Vector3(), 10000, 10, 10000);
        box.setModelBound(new BoundingBox());

        box.addController(new SpatialController<Box>() {
            double timer = 0;

            public void update(final double time, final Box caller) {
                timer += time;
                caller.setTranslation(Math.sin(timer) * 20.0, 0, Math.cos(timer) * 20.0);
            }
        });
        _root.attachChild(box);
    }

    /**
     * Setup occluders.
     */
    private Node setupOccluders() {
        final Node occluders = new Node("occs");
        _root.attachChild(occluders);
        for (int i = 0; i < 30; i++) {
            final double w = Math.random() * 40 + 10;
            final double y = Math.random() * 20 + 10;
            final Box b = new Box("box", new Vector3(), w, y, w);
            b.setModelBound(new BoundingBox());
            final double x = Math.random() * 1000 - 500;
            final double z = Math.random() * 1000 - 500;
            b.setTranslation(new Vector3(x, y, z));

            occluders.attachChild(b);
        }

        final Torus torusWithoutShadows = new Torus("torus", 32, 10, 15.0f, 20.0f);
        torusWithoutShadows.setModelBound(new BoundingBox());
        torusWithoutShadows.getSceneHints().setCastsShadows(false);
        torusWithoutShadows.setTranslation(0, 50, -100);
        occluders.attachChild(torusWithoutShadows);

        final Torus torus = new Torus("torus", 64, 12, 10.0f, 15.0f);
        torus.setModelBound(new BoundingBox());
        occluders.attachChild(torus);
        torus.addController(new SpatialController<Torus>() {
            double timer = 0;
            Matrix3 rotation = new Matrix3();

            public void update(final double time, final Torus caller) {
                timer += time;
                caller.setTranslation(Math.sin(timer) * 40.0, Math.sin(timer) * 50.0 + 20.0, Math.cos(timer) * 40.0);
                rotation.fromAngles(timer * 0.4, timer * 0.4, timer * 0.4);
                caller.setRotation(rotation);
            }
        });

        // Attach "billboard" with an alpha test.
        occluders.attachChild(makeBillBoard());

        return occluders;
    }

    private Spatial makeBillBoard() {
        final Node billboard = new Node("bb");
        billboard.getSceneHints().setRenderBucketType(RenderBucketType.Transparent);

        final Quad q1 = new Quad("font block", 150, 200);
        q1.setTranslation(0, 80, 0);
        q1.setModelBound(new BoundingBox());
        final CullState cs = new CullState();
        cs.setCullFace(CullState.Face.None);
        q1.setRenderState(cs);
        billboard.attachChild(q1);

        final TextureState ts = new TextureState();
        ts.setEnabled(true);
        ts.setTexture(TextureManager.load("fonts/OkasaSansSerif-35-medium-regular_00.png",
                Texture.MinificationFilter.Trilinear, true));
        billboard.setRenderState(ts);

        final BlendState bs = new BlendState();
        bs.setEnabled(true);
        bs.setBlendEnabled(false);
        bs.setTestEnabled(true);
        bs.setTestFunction(TestFunction.GreaterThan);
        bs.setReference(0.7f);
        billboard.setRenderState(bs);

        return billboard;
    }

}
\ No newline at end of file
+/**
 * Copyright (c) 2008-2012 Ardor Labs, Inc.
 *
 * This file is part of Ardor3D.
 *
 * Ardor3D is free software: you can redistribute it and/or modify it 
 * under the terms of its license which may be found in the accompanying
 * LICENSE file or at <http://www.ardor3d.com/LICENSE>.
 */

package com.ardor3d.example.effect;

import com.ardor3d.bounding.BoundingBox;
import com.ardor3d.example.ExampleBase;
import com.ardor3d.example.Purpose;
import com.ardor3d.extension.shadow.map.ParallelSplitShadowMapPass;
import com.ardor3d.framework.Canvas;
import com.ardor3d.image.Texture;
import com.ardor3d.image.Texture2D;
import com.ardor3d.input.Key;
import com.ardor3d.input.logical.InputTrigger;
import com.ardor3d.input.logical.KeyPressedCondition;
import com.ardor3d.input.logical.TriggerAction;
import com.ardor3d.input.logical.TwoInputStates;
import com.ardor3d.light.DirectionalLight;
import com.ardor3d.light.Light;
import com.ardor3d.light.PointLight;
import com.ardor3d.math.Matrix3;
import com.ardor3d.math.Vector3;
import com.ardor3d.renderer.Renderer;
import com.ardor3d.renderer.pass.BasicPassManager;
import com.ardor3d.renderer.pass.RenderPass;
import com.ardor3d.renderer.queue.RenderBucketType;
import com.ardor3d.renderer.state.BlendState;
import com.ardor3d.renderer.state.BlendState.TestFunction;
import com.ardor3d.renderer.state.CullState;
import com.ardor3d.renderer.state.MaterialState;
import com.ardor3d.renderer.state.MaterialState.ColorMaterial;
import com.ardor3d.renderer.state.TextureState;
import com.ardor3d.scenegraph.Node;
import com.ardor3d.scenegraph.Spatial;
import com.ardor3d.scenegraph.controller.SpatialController;
import com.ardor3d.scenegraph.hint.CullHint;
import com.ardor3d.scenegraph.hint.LightCombineMode;
import com.ardor3d.scenegraph.hint.TextureCombineMode;
import com.ardor3d.scenegraph.shape.Box;
import com.ardor3d.scenegraph.shape.Quad;
import com.ardor3d.scenegraph.shape.Torus;
import com.ardor3d.scenegraph.visitor.UpdateModelBoundVisitor;
import com.ardor3d.ui.text.BasicText;
import com.ardor3d.util.ReadOnlyTimer;
import com.ardor3d.util.TextureManager;

/**
 * Example showing the parallel split shadow mapping technique. Requires GLSL support.
 */
@Purpose(htmlDescriptionKey = "com.ardor3d.example.effect.ParallelSplitShadowMapExample", //
thumbnailPath = "com/ardor3d/example/media/thumbnails/effect_ParallelSplitShadowMapExample.jpg", //
maxHeapMemory = 64)
public class ParallelSplitShadowMapExample extends ExampleBase {

    /** Pssm shadow map pass. */
    private ParallelSplitShadowMapPass _pssmPass;

    /** Pass manager. */
    private BasicPassManager _passManager;

    /** Quads used for debug showing shadowmaps. */
    private Quad _orthoQuad[];

    /** Flag for turning on/off light movement. */
    private boolean _updateLight = false;

    /** Temp vec for updating light pos. */
    private final Vector3 lightPosition = new Vector3(10000, 5000, 10000);

    /** Text fields used to present info about the example. */
    private final BasicText _exampleInfo[] = new BasicText[12];

    /** Flag to make sure quads are updated on reinitialization of shadow renderer */
    private boolean _quadsDirty = true;

    /** Console fps output */
    private double counter = 0;
    private int frames = 0;

    /**
     * The main method.
     * 
     * @param args
     *            the arguments
     */
    public static void main(final String[] args) {
        start(ParallelSplitShadowMapExample.class);
    }

    /**
     * Update the PassManager and light.
     * 
     * @param timer
     *            the application timer
     */
    @Override
    protected void updateExample(final ReadOnlyTimer timer) {
        _passManager.updatePasses(timer.getTimePerFrame());

        if (_updateLight) {
            final double time = timer.getTimeInSeconds() * 0.2;
            lightPosition.set(Math.sin(time) * 10000.0, 5000.0, Math.cos(time) * 10000.0);
        }

        counter += timer.getTimePerFrame();
        frames++;
        if (counter > 1) {
            final double fps = (frames / counter);
            counter = 0;
            frames = 0;
            System.out.printf("%7.1f FPS\n", fps);
        }
    }

    /**
     * Initialize pssm if needed. Update light position. Render scene.
     * 
     * @param renderer
     *            the renderer
     */
    @Override
    protected void renderExample(final Renderer renderer) {
        if (!_pssmPass.isInitialised()) {
            _pssmPass.init(renderer);
        }
        updateQuadTextures(renderer);

        // Update the shadowpass "light" position. Iow it's camera.
        final Light light = _lightState.get(0);
        if (light instanceof PointLight) {
            ((PointLight) light).setLocation(lightPosition);
        } else if (light instanceof DirectionalLight) {
            ((DirectionalLight) light).setDirection(lightPosition.normalize(null).negateLocal());
        }

        _passManager.renderPasses(renderer);
    }

    /**
     * Initialize pssm pass and scene.
     */
    @Override
    protected void initExample() {
        // Setup main camera.
        _canvas.setTitle("Parallel Split Shadow Maps - Example");
        _canvas.getCanvasRenderer().getCamera().setLocation(new Vector3(250, 200, -250));
        _canvas.getCanvasRenderer()
                .getCamera()
                .setFrustumPerspective(
                        45.0,
                        (float) _canvas.getCanvasRenderer().getCamera().getWidth()
                                / (float) _canvas.getCanvasRenderer().getCamera().getHeight(), 1.0, 10000);
        _canvas.getCanvasRenderer().getCamera().lookAt(new Vector3(0, 0, 0), Vector3.UNIT_Y);

        _controlHandle.setMoveSpeed(200);

        // Setup some standard states for the scene.
        final CullState cullFrontFace = new CullState();
        cullFrontFace.setEnabled(true);
        cullFrontFace.setCullFace(CullState.Face.Back);
        _root.setRenderState(cullFrontFace);

        final TextureState ts = new TextureState();
        ts.setEnabled(true);
        ts.setTexture(TextureManager.load("images/ardor3d_white_256.jpg", Texture.MinificationFilter.Trilinear, true));
        _root.setRenderState(ts);

        final MaterialState ms = new MaterialState();
        ms.setColorMaterial(ColorMaterial.Diffuse);
        _root.setRenderState(ms);

        _passManager = new BasicPassManager();

        // setup some quads for debug viewing.
        final RenderPass renderPass = new RenderPass();
        final int quadSize = _canvas.getCanvasRenderer().getCamera().getWidth() / 10;
        _orthoQuad = new Quad[ParallelSplitShadowMapPass._MAX_SPLITS];
        for (int i = 0; i < ParallelSplitShadowMapPass._MAX_SPLITS; i++) {
            _orthoQuad[i] = new Quad("OrthoQuad", quadSize, quadSize);
            _orthoQuad[i].setTranslation(new Vector3((quadSize / 2 + 5) + (quadSize + 5) * i, (quadSize / 2 + 5), 1));
            _orthoQuad[i].getSceneHints().setRenderBucketType(RenderBucketType.Ortho);
            _orthoQuad[i].getSceneHints().setLightCombineMode(LightCombineMode.Off);
            _orthoQuad[i].getSceneHints().setTextureCombineMode(TextureCombineMode.Replace);
            _orthoQuad[i].getSceneHints().setCullHint(CullHint.Never);
            renderPass.add(_orthoQuad[i]);
        }

        // Create scene objects.
        setupTerrain();

        final RenderPass rootPass = new RenderPass();
        rootPass.add(_root);

        _lightState.detachAll();
        final DirectionalLight light = new DirectionalLight();
        // final PointLight light = new PointLight();
        light.setEnabled(true);
        _lightState.attach(light);

        // Create pssm pass
        _pssmPass = new ParallelSplitShadowMapPass(light, 1024, 3);
        _pssmPass.add(_root);
        _pssmPass.setUseSceneTexturing(true);
        _pssmPass.setUseObjectCullFace(true);

        final Node occluders = setupOccluders();
        _pssmPass.addOccluder(occluders);

        // Populate passmanager with passes.
        _passManager.add(rootPass);
        _passManager.add(_pssmPass);
        _passManager.add(renderPass);

        // Setup textfields for presenting example info.
        final Node textNodes = new Node("Text");
        renderPass.add(textNodes);
        textNodes.getSceneHints().setRenderBucketType(RenderBucketType.Ortho);
        textNodes.getSceneHints().setLightCombineMode(LightCombineMode.Off);

        final double infoStartY = _canvas.getCanvasRenderer().getCamera().getHeight();
        for (int i = 0; i < _exampleInfo.length; i++) {
            _exampleInfo[i] = BasicText.createDefaultTextLabel("Text", "", 16);
            _exampleInfo[i].setTranslation(new Vector3(10, infoStartY - (i + 1) * 20, 0));
            textNodes.attachChild(_exampleInfo[i]);
        }

        textNodes.updateGeometricState(0.0);
        updateText();

        // Register keyboard triggers for manipulating example
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.ZERO), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setDrawShaderDebug(!_pssmPass.isDrawShaderDebug());
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.ONE), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _updateLight = !_updateLight;
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.TWO), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setUpdateMainCamera(!_pssmPass.isUpdateMainCamera());
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.THREE), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setDrawDebug(!_pssmPass.isDrawDebug());
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.FOUR), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                if (_pssmPass.getNumOfSplits() > ParallelSplitShadowMapPass._MIN_SPLITS) {
                    _pssmPass.setNumOfSplits(_pssmPass.getNumOfSplits() - 1);
                    updateText();
                    _quadsDirty = true;
                }
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.FIVE), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                if (_pssmPass.getNumOfSplits() < ParallelSplitShadowMapPass._MAX_SPLITS) {
                    _pssmPass.setNumOfSplits(_pssmPass.getNumOfSplits() + 1);
                    updateText();
                    _quadsDirty = true;
                }
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.SIX), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                if (_pssmPass.getShadowMapSize() > 1) {
                    _pssmPass.setShadowMapSize(_pssmPass.getShadowMapSize() / 2);
                    updateText();
                    _quadsDirty = true;
                }
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.SEVEN), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                if (_pssmPass.getShadowMapSize() < 2048) {
                    _pssmPass.setShadowMapSize(_pssmPass.getShadowMapSize() * 2);
                    updateText();
                    _quadsDirty = true;
                }
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.EIGHT), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                final double maxShadowDistance = _pssmPass.getMaxShadowDistance();
                if (maxShadowDistance > 200.0) {
                    _pssmPass.setMaxShadowDistance(maxShadowDistance - 100.0);
                    updateText();
                }
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.NINE), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                final double maxShadowDistance = _pssmPass.getMaxShadowDistance();
                _pssmPass.setMaxShadowDistance(maxShadowDistance + 100.0);
                updateText();
            }
        }));

        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.U), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setNumOfSplits(1);
                _pssmPass.setShadowMapSize(1024);
                updateText();
                _quadsDirty = true;
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.I), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setNumOfSplits(3);
                _pssmPass.setShadowMapSize(512);
                updateText();
                _quadsDirty = true;
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.J), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setUseSceneTexturing(!_pssmPass.isUseSceneTexturing());
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.K), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setUseObjectCullFace(!_pssmPass.isUseObjectCullFace());
                updateText();
            }
        }));
        _logicalLayer.registerTrigger(new InputTrigger(new KeyPressedCondition(Key.SPACE), new TriggerAction() {
            public void perform(final Canvas source, final TwoInputStates inputStates, final double tpf) {
                _pssmPass.setEnabled(!_pssmPass.isEnabled());
                updateText();
                _quadsDirty = true;
            }
        }));

        // Make sure all boundings are updated.
        _root.acceptVisitor(new UpdateModelBoundVisitor(), false);
    }

    /**
     * Setup debug quads to render pssm shadowmaps.
     */
    private void updateQuadTextures(final Renderer r) {
        if (!_quadsDirty) {
            return;
        }
        _quadsDirty = false;

        _pssmPass.reinit(r);
        for (int i = 0; i < _pssmPass.getNumOfSplits(); i++) {
            final TextureState screen = new TextureState();
            final Texture2D copy = new Texture2D();
            copy.setTextureKey(_pssmPass.getShadowMapTexture(i).getTextureKey());
            screen.setTexture(copy);
            _orthoQuad[i].setRenderState(screen);
            _orthoQuad[i].getSceneHints().setCullHint(CullHint.Never);
            _orthoQuad[i].updateGeometricState(0.0);
        }
        for (int i = _pssmPass.getNumOfSplits(); i < ParallelSplitShadowMapPass._MAX_SPLITS; i++) {
            _orthoQuad[i].getSceneHints().setCullHint(CullHint.Always);
        }
    }

    /**
     * Update text information.
     */
    private void updateText() {
        _exampleInfo[0].setText("[0] Debug shader draw: " + _pssmPass.isDrawShaderDebug());
        _exampleInfo[1].setText("[1] Update light: " + _updateLight);
        _exampleInfo[2].setText("[2] Update main camera: " + _pssmPass.isUpdateMainCamera());
        _exampleInfo[3].setText("[3] Debug draw: " + _pssmPass.isDrawDebug());
        _exampleInfo[4].setText("[4/5] Number of splits: " + _pssmPass.getNumOfSplits());
        _exampleInfo[5].setText("[6/7] Shadow map size: " + _pssmPass.getShadowMapSize());
        _exampleInfo[6].setText("[8/9] Max shadow distance: " + _pssmPass.getMaxShadowDistance());
        _exampleInfo[7].setText("[U] Setup 1 split of size 1024");
        _exampleInfo[8].setText("[I] Setup 3 splits of size 512");
        _exampleInfo[9].setText("[J] Use scene texturing: " + _pssmPass.isUseSceneTexturing());
        _exampleInfo[10].setText("[K] Use object cull face: " + _pssmPass.isUseObjectCullFace());
        _exampleInfo[11].setText("[SPACE] toggle PSSM pass: " + (_pssmPass.isEnabled() ? "enabled" : "disabled"));
    }

    /**
     * Setup terrain.
     */
    private void setupTerrain() {
        final Box box = new Box("box", new Vector3(), 10000, 10, 10000);
        box.setModelBound(new BoundingBox());

        box.addController(new SpatialController<Box>() {
            double timer = 0;

            public void update(final double time, final Box caller) {
                timer += time;
                caller.setTranslation(Math.sin(timer) * 20.0, 0, Math.cos(timer) * 20.0);
            }
        });
        _root.attachChild(box);
    }

    /**
     * Setup occluders.
     */
    private Node setupOccluders() {
        final Node occluders = new Node("occs");
        _root.attachChild(occluders);
        for (int i = 0; i < 30; i++) {
            final double w = Math.random() * 40 + 10;
            final double y = Math.random() * 20 + 10;
            final Box b = new Box("box", new Vector3(), w, y, w);
            b.setModelBound(new BoundingBox());
            final double x = Math.random() * 1000 - 500;
            final double z = Math.random() * 1000 - 500;
            b.setTranslation(new Vector3(x, y, z));

            occluders.attachChild(b);
        }

        final Torus torusWithoutShadows = new Torus("torus", 32, 10, 15.0f, 20.0f);
        torusWithoutShadows.setModelBound(new BoundingBox());
        torusWithoutShadows.getSceneHints().setCastsShadows(false);
        torusWithoutShadows.setTranslation(0, 50, -100);
        occluders.attachChild(torusWithoutShadows);

        final Torus torus = new Torus("torus", 64, 12, 10.0f, 15.0f);
        torus.setModelBound(new BoundingBox());
        occluders.attachChild(torus);
        torus.addController(new SpatialController<Torus>() {
            double timer = 0;
            Matrix3 rotation = new Matrix3();

            public void update(final double time, final Torus caller) {
                timer += time;
                caller.setTranslation(Math.sin(timer) * 40.0, Math.sin(timer) * 50.0 + 20.0, Math.cos(timer) * 40.0);
                rotation.fromAngles(timer * 0.4, timer * 0.4, timer * 0.4);
                caller.setRotation(rotation);
            }
        });

        // Attach "billboard" with an alpha test.
        occluders.attachChild(makeBillBoard());

        return occluders;
    }

    private Spatial makeBillBoard() {
        final Node billboard = new Node("bb");
        billboard.getSceneHints().setRenderBucketType(RenderBucketType.Transparent);

        final Quad q1 = new Quad("font block", 150, 200);
        q1.setTranslation(0, 80, 0);
        q1.setModelBound(new BoundingBox());
        final CullState cs = new CullState();
        cs.setCullFace(CullState.Face.None);
        q1.setRenderState(cs);
        billboard.attachChild(q1);

        final TextureState ts = new TextureState();
        ts.setEnabled(true);
        ts.setTexture(TextureManager.load("fonts/OkasaSansSerif-35-medium-regular_00.png",
                Texture.MinificationFilter.Trilinear, true));
        billboard.setRenderState(ts);

        final BlendState bs = new BlendState();
        bs.setEnabled(true);
        bs.setBlendEnabled(false);
        bs.setTestEnabled(true);
        bs.setTestFunction(TestFunction.GreaterThan);
        bs.setReference(0.7f);
        billboard.setRenderState(bs);

        return billboard;
    }

}
\ No newline at end of file