Parsing is working now, Added PNG encoded PEX to use for now; Started…

… coding emitter logic and Particle Logic

dust-sample/src/main/java/com/billylindeman/dust/sample/DustActivity.java

@@ -4,6 +4,7 @@
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
+import android.widget.ImageView;
 
 import com.billylindeman.dust.particle.Emitter;
 import com.billylindeman.dust.particle.EmitterConfig;
@@ -16,8 +17,11 @@ protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_dust);
 
-        EmitterConfig config = EmitterConfig.fromStream(getResources().openRawResource(R.raw.plasma_glow));
+        EmitterConfig config = EmitterConfig.fromStream(getResources().openRawResource(R.raw.confetti));
         Emitter e = new Emitter(config);
+
+        ImageView imageView = (ImageView)findViewById(R.id.imageview);
+        imageView.setImageBitmap(config.texture);
     }
 
 

dust-sample/src/main/res/layout/activity_dust.xml

@@ -6,10 +6,11 @@
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     android:paddingBottom="@dimen/activity_vertical_margin"
+    android:background="@android:color/black"
     tools:context=".DustActivity">
 
-    <TextView
-        android:text="@string/hello_world"
+    <ImageView
+        android:id="@+id/imageview"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" />
 

dust-sample/src/main/res/raw/confetti.pex

@@ -0,0 +1,42 @@
+
+<particleEmitterConfig>
+    <absolutePosition value="0"></absolutePosition>
+    <yCoordFlipped value="1"></yCoordFlipped>
+    <sourcePosition x="150.00" y="50.00"></sourcePosition>
+    <sourcePositionVariance x="180.00" y="7.00"></sourcePositionVariance>
+    <speed value="0.00"></speed>
+    <speedVariance value="30.00"></speedVariance>
+    <particleLifeSpan value="7.2894"></particleLifeSpan>
+    <particleLifespanVariance value="0.0000"></particleLifespanVariance>
+    <angle value="90.00"></angle>
+    <angleVariance value="178.95"></angleVariance>
+    <gravity x="0.00" y="-120.00"></gravity>
+    <radialAcceleration value="0.00"></radialAcceleration>
+    <tangentialAcceleration value="0.00"></tangentialAcceleration>
+    <radialAccelVariance value="0.00"></radialAccelVariance>
+    <tangentialAccelVariance value="0.00"></tangentialAccelVariance>
+    <startColor red="0.85" green="0.30" blue="0.00" alpha="0.50"></startColor>
+    <startColorVariance red="1.00" green="1.00" blue="1.00" alpha="1.00"></startColorVariance>
+    <finishColor red="1.00" green="1.00" blue="1.00" alpha="1.00"></finishColor>
+    <finishColorVariance red="1.00" green="1.00" blue="1.00" alpha="1.00"></finishColorVariance>
+    <maxParticles value="2000"></maxParticles>
+    <startParticleSize value="12.00"></startParticleSize>
+    <startParticleSizeVariance value="0.00"></startParticleSizeVariance>
+    <finishParticleSize value="12.00"></finishParticleSize>
+    <finishParticleSizeVariance value="0.00"></finishParticleSizeVariance>
+    <duration value="-1.00"></duration>
+    <emitterType value="0"></emitterType>
+    <maxRadius value="0.00"></maxRadius>
+    <maxRadiusVariance value="0.00"></maxRadiusVariance>
+    <minRadius value="300.00"></minRadius>
+    <minRadiusVariance value="0.00"></minRadiusVariance>
+    <rotatePerSecond value="360.00"></rotatePerSecond>
+    <rotatePerSecondVariance value="0.00"></rotatePerSecondVariance>
+    <blendFuncSource value="1"></blendFuncSource>
+    <blendFuncDestination value="771"></blendFuncDestination>
+    <rotationStart value="50.11"></rotationStart>
+    <rotationStartVariance value="78.57"></rotationStartVariance>
+    <rotationEnd value="2302.98"></rotationEnd>
+    <rotationEndVariance value="0.00"></rotationEndVariance>
+    <texture name="confetti.png" data="H4sIAFyWPVQAA+sM8HPn5ZLiYmBg4PX0cAkC0vwgzMEGJK2vTfUCUpwFHpHFDAysnSDMmJsx9xdQULLENaIkOD+tpDyxKJXBMSU/KVXBMzcxPTUoNTGlsvBkqg1Q0TRPF8eQiltJf/7/t2fe2dDp8pXPQYbheWOOWoNsQ8XBepYfDJMPL/dk6FD/c5xP5kMmW+aeD/LmMxq8jRV7FT4wTH/G/L+TmeuFFDdHBgNrGNOVUp4X5/42uD9mnaGWs/AukMGYw9h9prJBvYDlQ2bZgeTVzOu2NMyxkU/y7ONu/MFw7kiXqqaS+1SmfUu6vQ8xSOVWXLZ1aGBkOCefExXk9zAJ6EIGT1c/l3VOCU0ANExRkAkBAAA="></texture>
+</particleEmitterConfig>

dust/src/main/java/com/billylindeman/dust/particle/Emitter.java

@@ -5,12 +5,57 @@
  */
 public class Emitter {
     EmitterConfig config;
+
+
     boolean active;
     Particle[] particles;
 
+    float emissionRate;
+    float emitCounter;
+    float elapsedTime;
+    int particleCount;
+    int particleIndex;
 
     public Emitter(EmitterConfig c){
         config = c;
+
+        emissionRate = config.maxParticles / config.particleLifespan;
+        emitCounter = 0;
+    }
+
+    public void updateWithDelta(float delta) {
+        if(active && emissionRate > 0) {
+            float rate = 1.0f / emissionRate;
+
+            if(particleCount < config.maxParticles) {
+                emitCounter += delta;
+            }
+
+            while(particleCount < config.maxParticles && emitCounter > rate) {
+                addParticle();
+                emitCounter -= rate;
+            }
+            elapsedTime += delta;
+
+            if(config.duration != -1 && config.duration < elapsedTime) {
+                stopEmission();
+            }
+        }
+
+        particleIndex = 0;
+
+        while(particleIndex < particleCount) {
+
+        }
+
+    }
+
+    private void addParticle() {
+
+    }
+
+    public void stopEmission() {
+
     }
 
 }

dust/src/main/java/com/billylindeman/dust/particle/EmitterConfig.java

@@ -4,6 +4,7 @@
 import android.graphics.BitmapFactory;
 import android.graphics.PointF;
 import android.util.Base64;
+import android.util.Log;
 
 import com.billylindeman.dust.util.Color;
 
@@ -41,11 +42,8 @@ public class EmitterConfig {
     float finishParticleSize, finishParticleSizeVariance;
 
     int maxParticles;
-    int particleCount;
 
-    float emissionRate;
-    float emitCounter;
-    float elapsedTime;
+
     float duration;
     float rotationStart, rotationStartVariance;
     float rotationEnd, rotationEndVariance;
@@ -115,12 +113,11 @@ private void extractConfigOptions(Document doc) throws Exception {
         rotationEnd                 = parseFloatValueForElement(doc, "rotationEnd");
         rotationEndVariance         = parseFloatValueForElement(doc, "rotationEndVariance");
 
-        emissionRate = maxParticles / particleLifespan;
-        emitCounter = 0;
-
 
         texture = parseBase64GzippedTextureFromDocument(doc);
-
+        if(texture == null) {
+            Log.d("EmitterConfig", "Texture format in PEX file unsupported!");
+        }
     }
 
 

dust/src/main/java/com/billylindeman/dust/particle/Particle.java

@@ -2,23 +2,57 @@
 
 import android.graphics.PointF;
 
+import java.util.Random;
+
 /**
  *
  */
 public class Particle {
-    PointF position;
-    PointF direction;
-    int color;
-    int deltaColor;
-    float rotation;
-    float rotationDelta;
-    float radialAcceleration;
-    float tangentialAcceleration;
-    float radius;
-    float radiusDelta;
-    float angle;
-    float degreesPerSecond;
-    float particleSize;
-    float particleSizeDelta;
-    float timeToLive;
+    static Random r = new Random();
+
+
+    private EmitterConfig config;
+
+    public PointF position;
+    public PointF direction;
+    public PointF startPos;
+    public int color;
+    public int deltaColor;
+    public float rotation;
+    public float rotationDelta;
+    public float radialAcceleration;
+    public float tangentialAcceleration;
+    public float radius;
+    public float radiusDelta;
+    public float angle;
+    public float degreesPerSecond;
+    public float particleSize;
+    public float particleSizeDelta;
+    public float timeToLive;
+
+    public Particle(EmitterConfig c) {
+        config = c;
+        init();
+    }
+
+    public void init() {
+        //init the position of the particle
+        position.x = config.sourcePosition.x + config.sourcePositionVariance.x * randomMinusOneToOne();
+        position.y = config.sourcePosition.y + config.sourcePositionVariance.y * randomMinusOneToOne();
+        startPos.x = config.sourcePosition.x;
+        startPos.y = config.sourcePosition.y;
+
+
+        //Init the direction of particle
+        angle = config.angle + config.angleVariance * randomMinusOneToOne();
+
+        PointF vector = new PointF()
+
+    }
+
+
+    private static float randomMinusOneToOne() {
+        return (r.nextFloat() * 2 ) - 1;
+    }
+
 }