Soft particles implementation.

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9223 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core-data/Common/MatDefs/Misc/Particle.j3md

@@ -4,6 +4,10 @@ MaterialDef Point Sprite {
         Texture2D Texture
         Float Quadratic
         Boolean PointSprite
+        
+        //only used for soft particles
+        Texture2D DepthTexture
+        Float Softness
 
         // Texture of the glowing parts of the material
         Texture2D GlowMap
@@ -58,6 +62,28 @@ MaterialDef Point Sprite {
         }
     }
 
+    Technique SoftParticles{
+
+        VertexShader   GLSL100 : Common/MatDefs/Misc/SoftParticle.vert
+        FragmentShader GLSL100 : Common/MatDefs/Misc/SoftParticle.frag
+
+        WorldParameters {
+            WorldViewProjectionMatrix
+            WorldViewMatrix
+            WorldMatrix
+            CameraPosition
+        }
+
+        RenderState {
+            Blend AlphaAdditive
+            DepthWrite Off
+        }
+
+        Defines {
+            USE_TEXTURE : Texture
+        }
+    }
+
     Technique FixedFunc {
         RenderState {
             Blend AlphaAdditive

engine/src/core-data/Common/MatDefs/Misc/SoftParticle.frag

@@ -0,0 +1,50 @@
+uniform sampler2D m_DepthTexture;
+uniform float m_Softness; // Power used in the contrast function
+varying vec2 vPos; // Position of the pixel
+varying vec2 projPos;// z and w valus in projection space
+
+#ifdef USE_TEXTURE
+uniform sampler2D m_Texture;
+varying vec4 texCoord;
+#endif
+
+varying vec4 color;
+
+float Contrast(float d){
+    float val = clamp( 2.0*( (d > 0.5) ? 1.0-d : d ), 0.0, 1.0);
+    float a = 0.5 * pow(val, m_Softness);
+    return (d > 0.5) ? 1.0 - a : a;
+}
+
+float stdDiff(float d){   
+    return clamp((d)*m_Softness,0.0,1.0);
+}
+
+
+void main(){
+    if (color.a <= 0.01)
+        discard;
+
+    vec4 c = vec4(1.0,1.0,1.0,1.0);//color;
+    #ifdef USE_TEXTURE
+        #ifdef POINT_SPRITE
+            vec2 uv = mix(texCoord.xy, texCoord.zw, gl_PointCoord.xy);
+        #else
+            vec2 uv = texCoord.xy;
+        #endif
+        c = texture2D(m_Texture, uv) * color;
+    #endif
+
+
+    float depthv = texture2D(m_DepthTexture, vPos).x*2.0-1.0; // Scene depth
+    depthv*=projPos.y;   
+    float particleDepth = projPos.x;
+	
+    float zdiff =depthv-particleDepth;
+    if(zdiff<=0.0){
+        discard;
+    }
+    // Computes alpha based on the particles distance to the rest of the scene
+    c.a = c.a * stdDiff(zdiff);// Contrast(zdiff);
+    gl_FragColor =c;
+}

engine/src/core-data/Common/MatDefs/Misc/SoftParticle.vert

@@ -0,0 +1,53 @@
+uniform mat4 g_WorldViewProjectionMatrix;
+
+attribute vec3 inPosition;
+attribute vec4 inColor;
+attribute vec4 inTexCoord;
+
+varying vec4 color;
+// z and w values in projection space
+varying vec2 projPos;
+varying vec2 vPos; // Position of the pixel in clip space
+
+
+
+#ifdef USE_TEXTURE
+varying vec4 texCoord;
+#endif
+
+#ifdef POINT_SPRITE
+uniform mat4 g_WorldViewMatrix;
+uniform mat4 g_WorldMatrix;
+uniform vec3 g_CameraPosition;
+uniform float m_Quadratic;
+const float SIZE_MULTIPLIER = 4.0;
+attribute float inSize;
+#endif
+
+void main(){
+    vec4 pos = vec4(inPosition, 1.0);
+
+    gl_Position = g_WorldViewProjectionMatrix * pos;
+    color = inColor;
+
+    projPos = gl_Position.zw;
+   // projPos.x = 0.5 * (projPos.x) + 0.5;
+
+    // Transforms the vPosition data to the range [0,1]
+    vPos = (gl_Position.xy / gl_Position.w + 1.0) / 2.0;
+
+    #ifdef USE_TEXTURE
+        texCoord = inTexCoord;
+    #endif
+
+    #ifdef POINT_SPRITE
+        vec4 worldPos = g_WorldMatrix * pos;
+        float d = distance(g_CameraPosition.xyz, worldPos.xyz);
+        gl_PointSize = max(1.0, (inSize * SIZE_MULTIPLIER * m_Quadratic) / d);
+
+        //vec4 worldViewPos = g_WorldViewMatrix * pos;
+        //gl_PointSize = (inSize * SIZE_MULTIPLIER * m_Quadratic)*100.0 / worldViewPos.z;
+
+        color.a *= min(gl_PointSize, 1.0);
+    #endif
+}

engine/src/core-effects/com/jme3/post/filters/TranslucentBucketFilter.java

@@ -5,6 +5,7 @@
 package com.jme3.post.filters;
 
 import com.jme3.asset.AssetManager;
+import com.jme3.effect.ParticleEmitter;
 import com.jme3.material.Material;
 import com.jme3.math.ColorRGBA;
 import com.jme3.post.Filter;
@@ -12,8 +13,14 @@ import com.jme3.renderer.RenderManager;
 import com.jme3.renderer.Renderer;
 import com.jme3.renderer.ViewPort;
 import com.jme3.renderer.queue.RenderQueue;
+import com.jme3.scene.Node;
+
+import com.jme3.scene.Spatial;
 import com.jme3.texture.FrameBuffer;
+import com.jme3.texture.Texture;
 import com.jme3.texture.Texture2D;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 /**
  * A filter to handle translucent objects when rendering a scene with filters that uses depth like WaterFilter and SSAOFilter
@@ -22,11 +29,25 @@ import com.jme3.texture.Texture2D;
  */
 public final class TranslucentBucketFilter extends Filter {
 
+    private final static Logger logger = Logger.getLogger(TranslucentBucketFilter.class.getName());
     private RenderManager renderManager;
+    private boolean enabledSoftParticles = false;
+    private Texture depthTexture;
+    private ViewPort viewPort;
+
+    public TranslucentBucketFilter() {
+        super("TranslucentBucketFilter");
+    }
+
+    public TranslucentBucketFilter(boolean enabledSoftParticles) {
+        this();
+        this.enabledSoftParticles = enabledSoftParticles;
+    }
 
     @Override
     protected void initFilter(AssetManager manager, RenderManager rm, ViewPort vp, int w, int h) {
         this.renderManager = rm;
+        this.viewPort = vp;
         material = new Material(manager, "Common/MatDefs/Post/Overlay.j3md");
         material.setColor("Color", ColorRGBA.White);
         Texture2D tex = processor.getFilterTexture();
@@ -37,6 +58,26 @@ public final class TranslucentBucketFilter extends Filter {
             material.clearParam("NumSamples");
         }
         renderManager.setHandleTranslucentBucket(false);
+        if (enabledSoftParticles && depthTexture != null) {
+            initSoftParticles(vp, true);
+        }
+    }
+
+    private void initSoftParticles(ViewPort vp, boolean enabledSP) {
+        if (depthTexture != null) {
+            for (Spatial scene : vp.getScenes()) {
+                makeSoftParticleEmitter(scene, enabledSP && enabled);
+            }
+        }
+
+    }
+
+    @Override
+    protected void setDepthTexture(Texture depthTexture) {
+        this.depthTexture = depthTexture;
+        if (enabledSoftParticles && depthTexture != null) {
+            initSoftParticles(viewPort, true);
+        }
     }
 
     /**
@@ -48,6 +89,11 @@ public final class TranslucentBucketFilter extends Filter {
         return false;
     }
 
+    @Override
+    protected boolean isRequiresDepthTexture() {
+        return enabledSoftParticles;
+    }
+
     @Override
     protected void postFrame(RenderManager renderManager, ViewPort viewPort, FrameBuffer prevFilterBuffer, FrameBuffer sceneBuffer) {
         renderManager.setCamera(viewPort.getCamera(), false);
@@ -63,6 +109,8 @@ public final class TranslucentBucketFilter extends Filter {
         if (renderManager != null) {
             renderManager.setHandleTranslucentBucket(true);
         }
+
+        initSoftParticles(viewPort, false);
     }
 
     @Override
@@ -76,5 +124,32 @@ public final class TranslucentBucketFilter extends Filter {
         if (renderManager != null) {
             renderManager.setHandleTranslucentBucket(!enabled);
         }
+        initSoftParticles(viewPort, enabledSoftParticles);
+    }
+
+    private void makeSoftParticleEmitter(Spatial scene, boolean enabled) {
+        if (scene instanceof Node) {
+            Node n = (Node) scene;
+            for (Spatial child : n.getChildren()) {
+                makeSoftParticleEmitter(child, enabled);
+            }
+        }
+        if (scene instanceof ParticleEmitter) {
+            ParticleEmitter emitter = (ParticleEmitter) scene;
+            if (enabled) {
+                enabledSoftParticles = enabled;
+
+                emitter.getMaterial().selectTechnique("SoftParticles", renderManager);
+                emitter.getMaterial().setTexture("DepthTexture", processor.getDepthTexture());
+                emitter.setQueueBucket(RenderQueue.Bucket.Translucent);
+
+                logger.log(Level.INFO, "Made particle Emitter {0} soft.", emitter.getName());
+            } else {
+                emitter.getMaterial().clearParam("DepthTexture");
+                emitter.getMaterial().selectTechnique("Default", renderManager);
+               // emitter.setQueueBucket(RenderQueue.Bucket.Transparent);
+                logger.log(Level.INFO, "Particle Emitter {0} is not soft anymore.", emitter.getName());
+            }
+        }
     }
 }

engine/src/core/com/jme3/post/Filter.java

@@ -40,6 +40,7 @@ import com.jme3.renderer.Renderer;
 import com.jme3.renderer.ViewPort;
 import com.jme3.texture.FrameBuffer;
 import com.jme3.texture.Image.Format;
+import com.jme3.texture.Texture;
 import com.jme3.texture.Texture2D;
 import java.io.IOException;
 import java.util.Collection;
@@ -236,7 +237,7 @@ public abstract class Filter implements Savable {
      * cleanup this filter
      * @param r
      */
-    protected final void cleanup(Renderer r) {
+    protected final void cleanup(Renderer r) {   
         processor = null;
         if (defaultPass != null) {
             defaultPass.cleanup(r);
@@ -269,8 +270,6 @@ public abstract class Filter implements Savable {
     protected void cleanUpFilter(Renderer r) {
     }
 
-    ;
-
     /**
      * Must return the material used for this filter.
      * this method is called every frame.
@@ -278,6 +277,14 @@ public abstract class Filter implements Savable {
      * @return the material used for this filter.
      */
     protected abstract Material getMaterial();
+    
+    /**
+     * Override if you want to do something special with the depth texture;
+     * @param depthTexture 
+     */
+    protected void setDepthTexture(Texture depthTexture){
+        getMaterial().setTexture("DepthTexture", depthTexture);
+    }
 
     /**
      * Override this method if you want to make a pre pass, before the actual rendering of the frame

engine/src/core/com/jme3/post/FilterPostProcessor.java

@@ -77,7 +77,7 @@ public class FilterPostProcessor implements SceneProcessor, Savable {
     private int originalHeight;
     private int lastFilterIndex = -1;
     private boolean cameraInit = false;
-
+    
     /**
      * Create a FilterProcessor 
      * @param assetManager the assetManager
@@ -98,8 +98,7 @@ public class FilterPostProcessor implements SceneProcessor, Savable {
      * @param filter the filter to add
      */
     public void addFilter(Filter filter) {
-        filters.add(filter);
-        filter.setProcessor(this);
+        filters.add(filter);        
 
         if (isInitialized()) {
             initFilter(filter, viewPort);
@@ -148,14 +147,17 @@ public class FilterPostProcessor implements SceneProcessor, Savable {
      * @param vp 
      */
     private void initFilter(Filter filter, ViewPort vp) {
-        filter.init(assetManager, renderManager, vp, width, height);
+        filter.setProcessor(this);
         if (filter.isRequiresDepthTexture()) {
-            if (!computeDepth && renderFrameBuffer != null) {
+            if (!computeDepth && renderFrameBuffer != null) {                
                 depthTexture = new Texture2D(width, height, Format.Depth24);
                 renderFrameBuffer.setDepthTexture(depthTexture);
             }
             computeDepth = true;
-            filter.getMaterial().setTexture("DepthTexture", depthTexture);
+            filter.init(assetManager, renderManager, vp, width, height);
+            filter.setDepthTexture(depthTexture);
+        } else {
+            filter.init(assetManager, renderManager, vp, width, height);
         }
     }
 
@@ -281,9 +283,9 @@ public class FilterPostProcessor implements SceneProcessor, Savable {
         } else if (renderFrameBufferMS != null) {
             sceneBuffer = renderFrameBufferMS;
         }
-        renderFilterChain(renderer, sceneBuffer);        
+        renderFilterChain(renderer, sceneBuffer);
         renderer.setFrameBuffer(outputBuffer);
-        
+
         //viewport can be null if no filters are enabled
         if (viewPort != null) {
             renderManager.setCamera(viewPort.getCamera(), false);
@@ -356,8 +358,11 @@ public class FilterPostProcessor implements SceneProcessor, Savable {
             //reseting the viewport camera viewport to its initial value
             viewPort.getCamera().resize(originalWidth, originalHeight, true);
             viewPort.getCamera().setViewPort(left, right, bottom, top);
-            viewPort.setOutputFrameBuffer(outputBuffer);          
+            viewPort.setOutputFrameBuffer(outputBuffer);            
             viewPort = null;
+            for (Filter filter : filters) {
+                filter.cleanup(renderer);
+            }
         }
 
     }
@@ -484,7 +489,7 @@ public class FilterPostProcessor implements SceneProcessor, Savable {
      * For internal use only<br>
      * returns the depth texture of the scene
      * @return 
-     */
+     */    
     public Texture2D getDepthTexture() {
         return depthTexture;
     }

engine/src/test/jme3test/effect/TestSoftParticles.java

@@ -0,0 +1,130 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package jme3test.effect;
+
+import com.jme3.app.SimpleApplication;
+import com.jme3.effect.ParticleEmitter;
+import com.jme3.effect.ParticleMesh;
+import com.jme3.effect.shapes.EmitterSphereShape;
+import com.jme3.input.KeyInput;
+import com.jme3.input.controls.ActionListener;
+import com.jme3.input.controls.KeyTrigger;
+import com.jme3.material.Material;
+import com.jme3.math.ColorRGBA;
+import com.jme3.math.Quaternion;
+import com.jme3.math.Vector3f;
+import com.jme3.post.FilterPostProcessor;
+import com.jme3.post.filters.TranslucentBucketFilter;
+import com.jme3.scene.Geometry;
+import com.jme3.scene.shape.Box;
+
+/**
+ *
+ * @author Nehon
+ */
+public class TestSoftParticles extends SimpleApplication {
+
+    private boolean softParticles = true;
+    private FilterPostProcessor fpp;
+    private TranslucentBucketFilter tbf;
+
+    public static void main(String[] args) {
+        TestSoftParticles app = new TestSoftParticles();
+        app.start();
+    }
+
+    @Override
+    public void simpleInitApp() {
+
+        cam.setLocation(new Vector3f(-7.2221026f, 4.1183004f, 7.759811f));
+        cam.setRotation(new Quaternion(0.06152846f, 0.91236454f, -0.1492115f, 0.37621948f));
+
+        flyCam.setMoveSpeed(10);
+
+
+        // -------- floor
+        Box b = new Box(Vector3f.ZERO, 10, 0.1f, 10);
+        Geometry geom = new Geometry("Box", b);
+        Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
+        mat.setColor("Color", ColorRGBA.Gray);
+        mat.setTexture("ColorMap", assetManager.loadTexture("Interface/Logo/Monkey.jpg"));
+        geom.setMaterial(mat);
+        rootNode.attachChild(geom);
+
+        Box b2 = new Box(Vector3f.ZERO, 1, 1, 1);
+        Geometry geom2 = new Geometry("Box", b2);
+        Material mat2 = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
+        mat2.setColor("Color", ColorRGBA.DarkGray);
+        geom2.setMaterial(mat2);
+        rootNode.attachChild(geom2);
+        geom2.setLocalScale(0.1f, 0.2f, 1);
+
+        fpp = new FilterPostProcessor(assetManager);        
+        tbf = new TranslucentBucketFilter(true);
+        fpp.addFilter(tbf);
+        viewPort.addProcessor(fpp);
+
+
+        Material material = new Material(assetManager, "Common/MatDefs/Misc/Particle.j3md");
+        material.setTexture("Texture", assetManager.loadTexture("Effects/Explosion/flame.png"));
+        
+        material.setFloat("Softness", 3f); // 
+
+
+        //Fire
+        ParticleEmitter fire = new ParticleEmitter("Fire", ParticleMesh.Type.Triangle, 30);
+        fire.setMaterial(material);
+        fire.setShape(new EmitterSphereShape(Vector3f.ZERO, 0.1f));
+        fire.setImagesX(2);
+        fire.setImagesY(2); // 2x2 texture animation
+        fire.setEndColor(new ColorRGBA(1f, 0f, 0f, 1f)); // red
+        fire.setStartColor(new ColorRGBA(1f, 1f, 0f, 0.5f)); // yellow
+        fire.setStartSize(0.6f);
+        fire.setEndSize(0.01f);
+        fire.setGravity(0, -0.3f, 0);
+        fire.setLowLife(0.5f);
+        fire.setHighLife(3f);
+        fire.setLocalTranslation(0, 0.2f, 0);
+
+        rootNode.attachChild(fire);
+        
+        
+        ParticleEmitter smoke = new ParticleEmitter("Smoke", ParticleMesh.Type.Triangle, 30);
+        smoke.setMaterial(material);
+        smoke.setShape(new EmitterSphereShape(Vector3f.ZERO, 5));
+        smoke.setImagesX(1);
+        smoke.setImagesY(1); // 2x2 texture animation
+        smoke.setStartColor(new ColorRGBA(0.1f, 0.1f, 0.1f,1f)); // dark gray
+        smoke.setEndColor(new ColorRGBA(0.5f, 0.5f, 0.5f, 0.3f)); // gray      
+        smoke.setStartSize(3f);
+        smoke.setEndSize(5f);
+        smoke.setGravity(0, -0.001f, 0);
+        smoke.setLowLife(100f);
+        smoke.setHighLife(100f);
+        smoke.setLocalTranslation(0, 0.1f, 0);        
+        smoke.emitAllParticles();
+        
+        rootNode.attachChild(smoke);
+
+        
+        inputManager.addListener(new ActionListener() {
+
+            public void onAction(String name, boolean isPressed, float tpf) {
+                if(isPressed && name.equals("toggle")){
+               //     tbf.setEnabled(!tbf.isEnabled());     
+                    softParticles = !softParticles;
+                    if(softParticles){
+                        viewPort.addProcessor(fpp);
+                    }else{
+                        viewPort.removeProcessor(fpp);
+                    }
+                }
+            }
+        }, "toggle");
+        inputManager.addMapping("toggle", new KeyTrigger(KeyInput.KEY_SPACE));
+    }
+    
+    
+}