jMonkeyEngine/engine/src/core/com/jme3/renderer/RenderManager.java

/*
 * Copyright (c) 2009-2010 jMonkeyEngine
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.jme3.renderer;

import com.jme3.material.Material;
import com.jme3.material.RenderState;
import com.jme3.math.Matrix3f;
import com.jme3.math.Matrix4f;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector2f;
import com.jme3.math.Vector3f;
import com.jme3.post.SceneProcessor;
import com.jme3.renderer.queue.GeometryList;
import com.jme3.renderer.queue.RenderQueue;
import com.jme3.renderer.queue.RenderQueue.Bucket;
import com.jme3.scene.Geometry;
import com.jme3.scene.Mesh;
import com.jme3.scene.Node;
import com.jme3.scene.Spatial;
import com.jme3.scene.VertexBuffer;
import com.jme3.shader.Uniform;
import com.jme3.shader.VarType;
import com.jme3.system.NullRenderer;
import com.jme3.system.Timer;
import com.jme3.util.IntMap.Entry;
import com.jme3.util.TempVars;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.logging.Logger;

/**
 * <code>RenderManager</code> is a high-level rendering interface that is
 * above the Renderer implementation. RenderManager takes care
 * of rendering the scene graphs attached to each viewport and
 * handling SceneProcessors.
 *
 * @see SceneProcessor
 * @see ViewPort
 * @see Spatial
 */
public class RenderManager {

    private static final Logger logger = Logger.getLogger(RenderManager.class.getName());
    private Renderer renderer;
    private Timer timer;
    private ArrayList<ViewPort> preViewPorts = new ArrayList<ViewPort>();
    private ArrayList<ViewPort> viewPorts = new ArrayList<ViewPort>();
    private ArrayList<ViewPort> postViewPorts = new ArrayList<ViewPort>();
    private Camera prevCam = null;
    private Material forcedMaterial = null;
    private String forcedTechnique = null;
    private RenderState forcedRenderState = null;
    private boolean shader;
    private int viewX, viewY, viewWidth, viewHeight;
    private float near, far;
    private Matrix4f orthoMatrix = new Matrix4f();
    private Matrix4f viewMatrix = new Matrix4f();
    private Matrix4f projMatrix = new Matrix4f();
    private Matrix4f viewProjMatrix = new Matrix4f();
    private Matrix4f worldMatrix = new Matrix4f();
    private Vector3f camUp = new Vector3f(),
            camLeft = new Vector3f(),
            camDir = new Vector3f(),
            camLoc = new Vector3f();
    //temp technique
    private String tmpTech;

    /**
     * Create a high-level rendering interface over the
     * low-level rendering interface.
     * @param renderer
     */
    public RenderManager(Renderer renderer) {
        this.renderer = renderer;
        //this.shader = renderer.getCaps().contains(Caps.GLSL100);
    }

    public ViewPort getPreView(String viewName) {
        for (int i = 0; i < preViewPorts.size(); i++) {
            if (preViewPorts.get(i).getName().equals(viewName)) {
                return preViewPorts.get(i);
            }
        }
        return null;
    }

    public boolean removePreView(ViewPort view) {
        return preViewPorts.remove(view);
    }

    public ViewPort getMainView(String viewName) {
        for (int i = 0; i < viewPorts.size(); i++) {
            if (viewPorts.get(i).getName().equals(viewName)) {
                return viewPorts.get(i);
            }
        }
        return null;
    }

    public boolean removeMainView(String viewName) {
        for (int i = 0; i < viewPorts.size(); i++) {
            if (viewPorts.get(i).getName().equals(viewName)) {
                viewPorts.remove(i);
                return true;
            }
        }
        return false;
    }

    public boolean removeMainView(ViewPort view) {
        return viewPorts.remove(view);
    }

    public ViewPort getPostView(String viewName) {
        for (int i = 0; i < postViewPorts.size(); i++) {
            if (postViewPorts.get(i).getName().equals(viewName)) {
                return postViewPorts.get(i);
            }
        }
        return null;
    }

    public boolean removePostView(String viewName) {
        for (int i = 0; i < postViewPorts.size(); i++) {
            if (postViewPorts.get(i).getName().equals(viewName)) {
                postViewPorts.remove(i);

                return true;
            }
        }
        return false;
    }

    public boolean removePostView(ViewPort view) {
        return postViewPorts.remove(view);
    }

    public List<ViewPort> getPreViews() {
        return Collections.unmodifiableList(preViewPorts);
    }

    public List<ViewPort> getMainViews() {
        return Collections.unmodifiableList(viewPorts);
    }

    public List<ViewPort> getPostViews() {
        return Collections.unmodifiableList(postViewPorts);
    }

    /**
     * Creates a new viewport, to display the given camera's content.
     * The view will be processed before the primary viewport.
     * @param viewName
     * @param cam
     * @return
     */
    public ViewPort createPreView(String viewName, Camera cam) {
        ViewPort vp = new ViewPort(viewName, cam);
        preViewPorts.add(vp);
        return vp;
    }

    public ViewPort createMainView(String viewName, Camera cam) {
        ViewPort vp = new ViewPort(viewName, cam);
        viewPorts.add(vp);
        return vp;
    }

    public ViewPort createPostView(String viewName, Camera cam) {
        ViewPort vp = new ViewPort(viewName, cam);
        postViewPorts.add(vp);
        return vp;
    }

    private void notifyReshape(ViewPort vp, int w, int h) {
        List<SceneProcessor> processors = vp.getProcessors();
        for (SceneProcessor proc : processors) {
            if (!proc.isInitialized()) {
                proc.initialize(this, vp);
            } else {
                proc.reshape(vp, w, h);
            }
        }
    }

    /**
     * @param w
     * @param h
     */
    public void notifyReshape(int w, int h) {
        for (ViewPort vp : preViewPorts) {
            if (vp.getOutputFrameBuffer() == null) {
                Camera cam = vp.getCamera();
                cam.resize(w, h, true);
            }
            notifyReshape(vp, w, h);
        }
        for (ViewPort vp : viewPorts) {
            if (vp.getOutputFrameBuffer() == null) {
                Camera cam = vp.getCamera();
                cam.resize(w, h, true);
            }
            notifyReshape(vp, w, h);
        }
        for (ViewPort vp : postViewPorts) {
            if (vp.getOutputFrameBuffer() == null) {
                Camera cam = vp.getCamera();
                cam.resize(w, h, true);
            }
            notifyReshape(vp, w, h);
        }
    }

    public void updateUniformBindings(List<Uniform> params) {
        // assums worldMatrix is properly set.
        TempVars vars = TempVars.get();
        assert vars.lock();

        Matrix4f tempMat4 = vars.tempMat4;
        Matrix3f tempMat3 = vars.tempMat3;
        Vector2f tempVec2 = vars.vect2d;
        Quaternion tempVec4 = vars.quat1;

        for (int i = 0; i < params.size(); i++) {
            Uniform u = params.get(i);
            switch (u.getBinding()) {
                case WorldMatrix:
                    u.setValue(VarType.Matrix4, worldMatrix);
                    break;
                case ViewMatrix:
                    u.setValue(VarType.Matrix4, viewMatrix);
                    break;
                case ProjectionMatrix:
                    u.setValue(VarType.Matrix4, projMatrix);
                    break;
                case ViewProjectionMatrix:
                    u.setValue(VarType.Matrix4, viewProjMatrix);
                    break;
                case WorldViewMatrix:
                    tempMat4.set(viewMatrix);
                    tempMat4.multLocal(worldMatrix);
                    u.setValue(VarType.Matrix4, tempMat4);
                    break;
                case NormalMatrix:
                    tempMat4.set(viewMatrix);
                    tempMat4.multLocal(worldMatrix);
                    tempMat4.toRotationMatrix(tempMat3);
                    tempMat3.invertLocal();
                    tempMat3.transposeLocal();
                    u.setValue(VarType.Matrix3, tempMat3);
                    break;
                case WorldViewProjectionMatrix:
                    tempMat4.set(viewProjMatrix);
                    tempMat4.multLocal(worldMatrix);
                    u.setValue(VarType.Matrix4, tempMat4);
                    break;
                case WorldMatrixInverse:
                    tempMat4.multLocal(worldMatrix);
                    tempMat4.invertLocal();
                    u.setValue(VarType.Matrix4, tempMat4);
                    break;
                case ViewMatrixInverse:
                    tempMat4.set(viewMatrix);
                    tempMat4.invertLocal();
                    u.setValue(VarType.Matrix4, tempMat4);
                    break;
                case ProjectionMatrixInverse:
                    tempMat4.set(projMatrix);
                    tempMat4.invertLocal();
                    u.setValue(VarType.Matrix4, tempMat4);
                    break;
                case ViewProjectionMatrixInverse:
                    tempMat4.set(viewProjMatrix);
                    tempMat4.invertLocal();
                    u.setValue(VarType.Matrix4, tempMat4);
                    break;
                case WorldViewMatrixInverse:
                    tempMat4.set(viewMatrix);
                    tempMat4.multLocal(worldMatrix);
                    tempMat4.invertLocal();
                    u.setValue(VarType.Matrix4, tempMat4);
                    break;
                case NormalMatrixInverse:
                    tempMat4.set(viewMatrix);
                    tempMat4.multLocal(worldMatrix);
                    tempMat4.toRotationMatrix(tempMat3);
                    tempMat3.invertLocal();
                    tempMat3.transposeLocal();
                    tempMat3.invertLocal();
                    u.setValue(VarType.Matrix3, tempMat3);
                    break;
                case WorldViewProjectionMatrixInverse:
                    tempMat4.set(viewProjMatrix);
                    tempMat4.multLocal(worldMatrix);
                    tempMat4.invertLocal();
                    u.setValue(VarType.Matrix4, tempMat4);
                    break;
                case ViewPort:
                    tempVec4.set(viewX, viewY, viewWidth, viewHeight);
                    u.setValue(VarType.Vector4, tempVec4);
                    break;
                case Resolution:
                    tempVec2.set(viewWidth, viewHeight);
                    u.setValue(VarType.Vector2, tempVec2);
                    break;
                case Aspect:
                    float aspect = ((float) viewWidth) / viewHeight;
                    u.setValue(VarType.Float, aspect);
                    break;
                case FrustumNearFar:
                    tempVec2.set(near, far);
                    u.setValue(VarType.Vector2, tempVec2);
                    break;
                case CameraPosition:
                    u.setValue(VarType.Vector3, camLoc);
                    break;
                case CameraDirection:
                    u.setValue(VarType.Vector3, camDir);
                    break;
                case CameraLeft:
                    u.setValue(VarType.Vector3, camLeft);
                    break;
                case CameraUp:
                    u.setValue(VarType.Vector3, camUp);
                    break;
                case Time:
                    u.setValue(VarType.Float, timer.getTimeInSeconds());
                    break;
                case Tpf:
                    u.setValue(VarType.Float, timer.getTimePerFrame());
                    break;
                case FrameRate:
                    u.setValue(VarType.Float, timer.getFrameRate());
                    break;
            }
        }

        assert vars.unlock();
    }

    /**
     * Set the material to use to render all future objects.
     * This overrides the material set on the geometry and renders
     * with the provided material instead.
     * Use null to clear the material and return renderer to normal
     * functionality.
     * @param mat
     */
    public void setForcedMaterial(Material mat) {
        forcedMaterial = mat;
    }

    public RenderState getForcedRenderState() {
        return forcedRenderState;
    }

    public void setForcedRenderState(RenderState forcedRenderState) {
        this.forcedRenderState = forcedRenderState;
    }

    public void setWorldMatrix(Matrix4f mat) {
        if (shader) {
            worldMatrix.set(mat);
        } else {
            renderer.setWorldMatrix(mat);
        }
    }

    public void renderGeometry(Geometry g) {
        if (g.isIgnoreTransform()) {
            setWorldMatrix(Matrix4f.IDENTITY);
        } else {
            setWorldMatrix(g.getWorldMatrix());
        }

        //if forcedTechnique we try to force it for render,
        //if it does not exists in the mat def, we check for forcedMaterial and render the geom if not null
        //else the geom is not rendered
        if (forcedTechnique != null) {
            if (g.getMaterial().getMaterialDef().getTechniqueDef(forcedTechnique) != null) {
                tmpTech = g.getMaterial().getActiveTechnique() != null ? g.getMaterial().getActiveTechnique().getDef().getName() : "Default";
                g.getMaterial().selectTechnique(forcedTechnique, this);
                // use geometry's material
                g.getMaterial().render(g, this);
                g.getMaterial().selectTechnique(tmpTech, this);
                //Reverted this part from revision 6197
                //If forcedTechnique does not exists, and frocedMaterial is not set, the geom MUST NOT be rendered
            } else if (forcedMaterial != null) {
                // use forced material
                forcedMaterial.render(g, this);
            }
        } else if (forcedMaterial != null) {
            // use forced material
            forcedMaterial.render(g, this);
        } else {
            g.getMaterial().render(g, this);
        }
        //re applying default render state at the end of the render to avoid depth write issues, MUST BE A BETTER WAY
        renderer.applyRenderState(RenderState.DEFAULT);
    }

    public void renderGeometryList(GeometryList gl) {
        for (int i = 0; i < gl.size(); i++) {
            renderGeometry(gl.get(i));
        }
    }

    /**
     * If a spatial is not inside the eye frustum, it
     * is still rendered in the shadow frustum through this
     * recursive method.
     * @param s
     * @param r
     */
    private void renderShadow(Spatial s, RenderQueue rq) {
        if (s instanceof Node) {
            Node n = (Node) s;
            List<Spatial> children = n.getChildren();
            for (int i = 0; i < children.size(); i++) {
                renderShadow(children.get(i), rq);
            }
        } else if (s instanceof Geometry) {
            Geometry gm = (Geometry) s;

            RenderQueue.ShadowMode shadowMode = s.getShadowMode();
            if (shadowMode != RenderQueue.ShadowMode.Off && shadowMode != RenderQueue.ShadowMode.Receive) {
                //forcing adding to shadow cast mode, culled objects doesn't have to be in the receiver queue
                rq.addToShadowQueue(gm, RenderQueue.ShadowMode.Cast);
            }
        }
    }

    public void preloadScene(Spatial scene) {
        if (scene instanceof Node) {
            // recurse for all children
            Node n = (Node) scene;
            List<Spatial> children = n.getChildren();
            for (int i = 0; i < children.size(); i++) {
                preloadScene(children.get(i));
            }
        } else if (scene instanceof Geometry) {
            // add to the render queue
            Geometry gm = (Geometry) scene;
            if (gm.getMaterial() == null) {
                throw new IllegalStateException("No material is set for Geometry: " + gm.getName());
            }

            gm.getMaterial().preload(this);
            Mesh mesh = gm.getMesh();
            if (mesh != null) {
                for (Entry<VertexBuffer> entry : mesh.getBuffers()) {
                    VertexBuffer buf = entry.getValue();
                    if (buf.getData() != null) {
                        renderer.updateBufferData(buf);
                    }
                }
            }
        }
    }

    /**
     * Render scene graph
     * @param s
     * @param r
     * @param cam
     */
    public void renderScene(Spatial scene, ViewPort vp) {
        // check culling first.
        if (!scene.checkCulling(vp.getCamera())) {
            // move on to shadow-only render
            if (scene.getShadowMode() != RenderQueue.ShadowMode.Off || scene instanceof Node) {
                renderShadow(scene, vp.getQueue());
            }
            return;
        }

        scene.runControlRender(this, vp);
        if (scene instanceof Node) {
            // recurse for all children
            Node n = (Node) scene;
            List<Spatial> children = n.getChildren();
            for (int i = 0; i < children.size(); i++) {
                renderScene(children.get(i), vp);
            }
        } else if (scene instanceof Geometry) {

            // add to the render queue
            Geometry gm = (Geometry) scene;
            if (gm.getMaterial() == null) {
                throw new IllegalStateException("No material is set for Geometry: " + gm.getName());
            }

            vp.getQueue().addToQueue(gm, scene.getQueueBucket());

            // add to shadow queue if needed
            RenderQueue.ShadowMode shadowMode = scene.getShadowMode();
            if (shadowMode != RenderQueue.ShadowMode.Off) {
                vp.getQueue().addToShadowQueue(gm, shadowMode);
            }
        }
    }

    public Camera getCurrentCamera() {
        return prevCam;
    }

    public Renderer getRenderer() {
        return renderer;
    }

    /**
     * Render the given viewport queues, flushing the geometryList
     * @param vp the viewport
     */
    public void flushQueue(ViewPort vp) {
        renderViewPortQueues(vp, true);
    }

    public void clearQueue(ViewPort vp) {
        vp.getQueue().clear();
    }

    //Nehon 08/18/2010 changed flushQueue to renderViewPortQueues with a flush boolean param
    /**
     * Render the given viewport queues
     * @param vp the viewport
     * @param flush true to flush geometryList
     */
    public void renderViewPortQueues(ViewPort vp, boolean flush) {
        RenderQueue rq = vp.getQueue();
        Camera cam = vp.getCamera();
        boolean depthRangeChanged = false;

        // render opaque objects with default depth range
        // opaque objects are sorted front-to-back, reducing overdraw
        rq.renderQueue(Bucket.Opaque, this, cam, flush);

        // render the sky, with depth range set to the farthest
        if (!rq.isQueueEmpty(Bucket.Sky)) {
            renderer.setDepthRange(1, 1);
            rq.renderQueue(Bucket.Sky, this, cam, flush);
            depthRangeChanged = true;
        }


        // transparent objects are last because they require blending with the
        // rest of the scene's objects. Consequently, they are sorted
        // back-to-front.
        if (!rq.isQueueEmpty(Bucket.Transparent)) {
            if (depthRangeChanged) {
                renderer.setDepthRange(0, 1);
                depthRangeChanged = false;
            }

            rq.renderQueue(Bucket.Transparent, this, cam, flush);
        }

        if (!rq.isQueueEmpty(Bucket.Gui)) {
            renderer.setDepthRange(0, 0);
            setCamera(cam, true);
            rq.renderQueue(Bucket.Gui, this, cam, flush);
            setCamera(cam, false);
            depthRangeChanged = true;
        }

        // restore range to default
        if (depthRangeChanged) {
            renderer.setDepthRange(0, 1);
        }
    }

    private void setViewPort(Camera cam) {
        // this will make sure to update viewport only if needed
        if (cam != prevCam || cam.isViewportChanged()) {
            viewX = (int) (cam.getViewPortLeft() * cam.getWidth());
            viewY = (int) (cam.getViewPortBottom() * cam.getHeight());
            viewWidth = (int) ((cam.getViewPortRight() - cam.getViewPortLeft()) * cam.getWidth());
            viewHeight = (int) ((cam.getViewPortTop() - cam.getViewPortBottom()) * cam.getHeight());
            renderer.setViewPort(viewX, viewY, viewWidth, viewHeight);
            renderer.setClipRect(viewX, viewY, viewWidth, viewHeight);
            cam.clearViewportChanged();
            prevCam = cam;

//            float translateX = viewWidth == viewX ? 0 : -(viewWidth + viewX) / (viewWidth - viewX);
//            float translateY = viewHeight == viewY ? 0 : -(viewHeight + viewY) / (viewHeight - viewY);
//            float scaleX = viewWidth == viewX ? 1f : 2f / (viewWidth - viewX);
//            float scaleY = viewHeight == viewY ? 1f : 2f / (viewHeight - viewY);
//            
//            orthoMatrix.loadIdentity();
//            orthoMatrix.setTranslation(translateX, translateY, 0);
//            orthoMatrix.setScale(scaleX, scaleY, 0); 
            
            orthoMatrix.loadIdentity();
            orthoMatrix.setTranslation(-1f, -1f, 0f);
            orthoMatrix.setScale(2f / cam.getWidth(), 2f / cam.getHeight(), 0f);
        }
    }

    private void setViewProjection(Camera cam, boolean ortho) {
        if (shader) {
            if (ortho) {
                viewMatrix.set(Matrix4f.IDENTITY);
                projMatrix.set(orthoMatrix);
                viewProjMatrix.set(orthoMatrix);
            } else {
                viewMatrix.set(cam.getViewMatrix());
                projMatrix.set(cam.getProjectionMatrix());
                viewProjMatrix.set(cam.getViewProjectionMatrix());
            }

            camLoc.set(cam.getLocation());
            cam.getLeft(camLeft);
            cam.getUp(camUp);
            cam.getDirection(camDir);

            near = cam.getFrustumNear();
            far = cam.getFrustumFar();
        } else {
            if (ortho) {
                renderer.setViewProjectionMatrices(Matrix4f.IDENTITY, orthoMatrix);
            } else {
                renderer.setViewProjectionMatrices(cam.getViewMatrix(),
                        cam.getProjectionMatrix());
            }

        }
    }

    public void setCamera(Camera cam, boolean ortho) {
        setViewPort(cam);
        setViewProjection(cam, ortho);
    }

    /**
     * Draws the viewport but doesn't invoke processors.
     * @param vp
     */
    public void renderViewPortRaw(ViewPort vp) {
        setCamera(vp.getCamera(), false);
        List<Spatial> scenes = vp.getScenes();
        for (int i = scenes.size() - 1; i >= 0; i--) {
            renderScene(scenes.get(i), vp);
        }
        flushQueue(vp);
    }

    public void renderViewPort(ViewPort vp, float tpf) {
        if (!vp.isEnabled()) {
            return;
        }
        List<SceneProcessor> processors = vp.getProcessors();
        if (processors.size() == 0) {
            processors = null;
        }

        if (processors != null) {
            for (SceneProcessor proc : processors) {
                if (!proc.isInitialized()) {
                    proc.initialize(this, vp);
                }
                proc.preFrame(tpf);
            }
        }

        renderer.setFrameBuffer(vp.getOutputFrameBuffer());
        setCamera(vp.getCamera(), false);
        if (vp.isClearDepth() || vp.isClearColor() || vp.isClearStencil()) {
            if (vp.isClearColor()) {
                renderer.setBackgroundColor(vp.getBackgroundColor());
            }
            renderer.clearBuffers(vp.isClearColor(),
                    vp.isClearDepth(),
                    vp.isClearStencil());
        }

        List<Spatial> scenes = vp.getScenes();
        for (int i = scenes.size() - 1; i >= 0; i--) {
            renderScene(scenes.get(i), vp);
        }

        if (processors != null) {
            for (SceneProcessor proc : processors) {
                proc.postQueue(vp.getQueue());
            }
        }

        flushQueue(vp);

        if (processors != null) {
            for (SceneProcessor proc : processors) {
                proc.postFrame(vp.getOutputFrameBuffer());
            }
        }

        // clear any remaining spatials that were not rendered.
        clearQueue(vp);
    }

    public void render(float tpf) {
        if (renderer instanceof NullRenderer) {
            return;
        }

        this.shader = renderer.getCaps().contains(Caps.GLSL100);

        for (int i = 0; i < preViewPorts.size(); i++) {
            renderViewPort(preViewPorts.get(i), tpf);
        }
        for (int i = 0; i < viewPorts.size(); i++) {
            renderViewPort(viewPorts.get(i), tpf);
        }
        for (int i = 0; i < postViewPorts.size(); i++) {
            renderViewPort(postViewPorts.get(i), tpf);
        }
    }

    //Remy - 09/14/2010 - added a setter for the timer in order to correctly populate g_Time and g_Tpf in the shaders
    public void setTimer(Timer timer) {
        this.timer = timer;
    }

    public String getForcedTechnique() {
        return forcedTechnique;
    }

    public void setForcedTechnique(String forcedTechnique) {
        this.forcedTechnique = forcedTechnique;
    }

    public void setAlphaToCoverage(boolean value) {
        renderer.setAlphaToCoverage(value);
    }
}