particles colors

modules/particle.otpa

@@ -1,15 +1,15 @@
 ParticleSystem
   AttractionAffector
     delay: 0
-    duration: 12
-    destination: 200 200
+    duration: 999
+    position: 200 200
     acceleration: 64
     velocity-reduction-percent: 0
 
   Emitter
     position: 200 264
     duration: 2
-    burstRate: 0.2
+    burstRate: 3
     burstCount: 1
     delay: 0
     
@@ -21,22 +21,6 @@ ParticleSystem
     particle-velocity-angle: 0
     particle-acceleration: 0
     particle-size: 32 32
-    particle-color: #33ff33ff
-    particle-texture: circle2.png
-
-  Emitter
-    position: 200 200
-    burstRate: 13
-    burstCount: 1
-    duration: 12
-
-    particle-duration: 12
-
-    particle-position-radius: 0
-    particle-velocity: 0
-    particle-velocity-angle: 0
-    particle-acceleration: 0
-    particle-size: 32 32
-    particle-color: #33ff33ff
+    particle-colors: #00ff00ff #ff0000ff #0000ffff #00ff00ff #00ff0000
+    particle-colors-stops: 3 6 9 12
     particle-texture: circle2.png
-

src/framework/graphics/particle.cpp

@@ -24,14 +24,17 @@
 #include "graphics.h"
 #include <framework/core/clock.h>
 
-Particle::Particle(const Point& pos, const Size& size, const PointF& velocity, const PointF& acceleration, float duration, float ignorePhysicsAfter, const Color& color, TexturePtr texture)
+Particle::Particle(const Point& pos, const Size& size, const PointF& velocity, const PointF& acceleration, float duration, float ignorePhysicsAfter, const std::vector<Color>& colors, const std::vector<float>& colorsStops, TexturePtr texture)
 {
+    m_colors = colors;
+    m_colorsStops = colorsStops;
+
     m_rect = Rect(pos, size);
     m_position = PointF(pos.x, pos.y);
     m_size = size;
     m_velocity = velocity;
     m_acceleration = acceleration;
-    m_color = color;
+
     m_texture = texture;
     m_duration = duration;
     m_ignorePhysicsAfter = ignorePhysicsAfter;
@@ -55,13 +58,14 @@ void Particle::render()
 void Particle::update(double elapsedTime)
 {
     // check if finished
-    if(m_duration > 0 && m_elapsedTime >= m_duration) {
+    if(m_duration >= 0 && m_elapsedTime >= m_duration) {
         m_finished = true;
         return;
     }
 
-    m_elapsedTime += elapsedTime;
+    updateColor();
 
+    // update position
     if(m_ignorePhysicsAfter < 0 || m_elapsedTime < m_ignorePhysicsAfter ) {
         // update position
         PointF delta = m_velocity * elapsedTime;
@@ -73,4 +77,25 @@ void Particle::update(double elapsedTime)
 
         m_rect.moveTo((int)m_position.x - m_size.width() / 2, (int)m_position.y - m_size.height() / 2);
     }
+
+    m_elapsedTime += elapsedTime;
+}
+
+void Particle::updateColor()
+{
+    if(m_elapsedTime < m_colorsStops[1]) {
+        m_color.setRGBA(m_colors[0].r() + (m_colors[1].r() - m_colors[0].r()) / (m_colorsStops[1] - m_colorsStops[0]) * (m_elapsedTime - m_colorsStops[0]),
+                        m_colors[0].g() + (m_colors[1].g() - m_colors[0].g()) / (m_colorsStops[1] - m_colorsStops[0]) * (m_elapsedTime - m_colorsStops[0]),
+                        m_colors[0].b() + (m_colors[1].b() - m_colors[0].b()) / (m_colorsStops[1] - m_colorsStops[0]) * (m_elapsedTime - m_colorsStops[0]),
+                        m_colors[0].a() + (m_colors[1].a() - m_colors[0].a()) / (m_colorsStops[1] - m_colorsStops[0]) * (m_elapsedTime - m_colorsStops[0]));
+    }
+    else {
+        if(m_colors.size() > 1) {
+            m_colors.erase(m_colors.begin());
+            m_colorsStops.erase(m_colorsStops.begin());
+        }
+        else {
+            m_color = m_colors[0];
+        }
+    }
 }

src/framework/graphics/particle.h

@@ -28,7 +28,7 @@
 
 class Particle {
 public:
-    Particle(const Point& pos, const Size& size, const PointF& velocity, const PointF& acceleration, float duration, float ignorePhysicsAfter, const Color& color = Fw::white, TexturePtr texture = nullptr);
+    Particle(const Point& pos, const Size& size, const PointF& velocity, const PointF& acceleration, float duration, float ignorePhysicsAfter, const std::vector<Color>& colors, const std::vector<float>& colorsStops, TexturePtr texture = nullptr);
 
     void render();
     void update(double elapsedTime);
@@ -42,7 +42,11 @@ public:
     void setVelocity(const PointF& velocity) { m_velocity = velocity; }
 
 private:
+    void updateColor();
+
     Color m_color;
+    std::vector<Color> m_colors;
+    std::vector<float> m_colorsStops;
     TexturePtr m_texture;
     PointF m_position;
     PointF m_velocity;

src/framework/graphics/particleaffector.cpp

@@ -37,7 +37,7 @@ ParticleAffector::ParticleAffector()
 
 void ParticleAffector::update(double elapsedTime)
 {
-    if(m_duration > 0 && m_elapsedTime >= m_duration + m_delay) {
+    if(m_duration >= 0 && m_elapsedTime >= m_duration + m_delay) {
         m_finished = true;
         return;
     }
@@ -114,8 +114,8 @@ bool AttractionAffector::load(const OTMLNodePtr& node)
     m_acceleration = 32;
 
     for(const OTMLNodePtr& childNode : node->children()) {
-        if(childNode->tag() == "destination")
-            m_destination = childNode->value<Point>();
+        if(childNode->tag() == "position")
+            m_position = childNode->value<Point>();
         else if(childNode->tag() == "acceleration")
             m_acceleration = childNode->value<float>();
         else if(childNode->tag() == "velocity-reduction-percent")
@@ -130,7 +130,7 @@ void AttractionAffector::updateParticle(const ParticlePtr& particle, double elap
         return;
 
     PointF pPosition = particle->getPosition();
-    PointF d = PointF(m_destination.x - pPosition.x, pPosition.y - m_destination.y);
+    PointF d = PointF(m_position.x - pPosition.x, pPosition.y - m_position.y);
     if(d.length() == 0)
         return;
 

src/framework/graphics/particleaffector.h

@@ -58,7 +58,7 @@ public:
     void updateParticle(const ParticlePtr& particle, double elapsedTime);
 
 private:
-    Point m_destination;
+    Point m_position;
     float m_acceleration, m_reduction;
 };
 

src/framework/graphics/particleemitter.cpp

@@ -40,6 +40,7 @@ ParticleEmitter::ParticleEmitter(const ParticleSystemPtr& parent)
     m_currentBurst = 0;
     m_elapsedTime = 0;
     m_finished = false;
+    m_active = false;
 
     // particles default configuration. (make them reasonable for user detect missing properties on scripts)
     m_pMinPositionRadius = 0;
@@ -59,7 +60,6 @@ ParticleEmitter::ParticleEmitter(const ParticleSystemPtr& parent)
     m_pMaxAcceleration = 64;
     m_pMinAccelerationAngle = 0;
     m_pMaxAccelerationAngle = 360;
-    m_pColor = Color(255, 255, 255, 128);
 }
 
 bool ParticleEmitter::load(const OTMLNodePtr& node)
@@ -152,55 +152,70 @@ bool ParticleEmitter::load(const OTMLNodePtr& node)
             m_pMinSize = childNode->value<Size>();
         else if(childNode->tag() == "particle-max-size")
             m_pMaxSize = childNode->value<Size>();
-        else if(childNode->tag() == "particle-color")
-            m_pColor = childNode->value<Color>();
+
+        else if(childNode->tag() == "particle-colors")
+            m_pColors = Fw::split<Color>(childNode->value());
+        else if(childNode->tag() == "particle-colors-stops")
+            m_pColorsStops = Fw::split<float>(childNode->value());
         else if(childNode->tag() == "particle-texture")
             m_pTexture = g_textures.getTexture(childNode->value());
     }
+
+    if(m_pColors.empty())
+        m_pColors.push_back(Color(255, 255, 255, 128));
+    m_pColorsStops.insert(m_pColorsStops.begin(), 0);
+
+    if(m_pColors.size() != m_pColorsStops.size()) {
+        logError("particle colors must be equal to colorstops-1");
+        return false;
+    }
+
     return true;
 }
 
 void ParticleEmitter::update(double elapsedTime)
 {
     // check if finished
-    if(m_duration > 0 && m_elapsedTime >= m_duration + m_delay) {
+    if(m_duration >= 0 && m_elapsedTime >= m_duration + m_delay) {
         m_finished = true;
         return;
     }
 
-    m_elapsedTime += elapsedTime;
-
-    if(m_elapsedTime - elapsedTime < m_delay)
-        return;
+    if(!m_active && m_elapsedTime > m_delay)
+        m_active = true;
 
-    int currentBurst = std::floor((m_elapsedTime - m_delay) / m_burstRate) + 1;
-    for(int b = m_currentBurst; b < currentBurst; ++b) {
+    if(m_active) {
+        int currentBurst = std::floor((m_elapsedTime - m_delay) / m_burstRate) + 1;
+        for(int b = m_currentBurst; b < currentBurst; ++b) {
 
-        // every burst created at same position.
-        float pRadius = Fw::randomRange(m_pMinPositionRadius, m_pMaxPositionRadius);
-        float pAngle = Fw::randomRange(m_pMinPositionAngle, m_pMaxPositionAngle);
+            // every burst created at same position.
+            float pRadius = Fw::randomRange(m_pMinPositionRadius, m_pMaxPositionRadius);
+            float pAngle = Fw::randomRange(m_pMinPositionAngle, m_pMaxPositionAngle);
 
-        Point pPosition = m_position + Point(pRadius * cos(pAngle), pRadius * sin(pAngle));
+            Point pPosition = m_position + Point(pRadius * cos(pAngle), pRadius * sin(pAngle));
 
-        for(int p = 0; p < m_burstCount; ++p) {
+            for(int p = 0; p < m_burstCount; ++p) {
 
-            Size pSize = Size(Fw::randomRange(m_pMinSize.width(), m_pMaxSize.width()), Fw::randomRange(m_pMinSize.height(), m_pMaxSize.height()));
-            float pDuration = Fw::randomRange(m_pMinDuration, m_pMaxDuration);
+                Size pSize = Size(Fw::randomRange(m_pMinSize.width(), m_pMaxSize.width()), Fw::randomRange(m_pMinSize.height(), m_pMaxSize.height()));
+                float pDuration = Fw::randomRange(m_pMinDuration, m_pMaxDuration);
 
-            // particles initial velocity
-            float pVelocityAbs = Fw::randomRange(m_pMinVelocity, m_pMaxVelocity);
-            float pVelocityAngle = Fw::randomRange(m_pMinVelocityAngle, m_pMaxVelocityAngle);
-            PointF pVelocity(pVelocityAbs * cos(pVelocityAngle), pVelocityAbs * sin(pVelocityAngle));
+                // particles initial velocity
+                float pVelocityAbs = Fw::randomRange(m_pMinVelocity, m_pMaxVelocity);
+                float pVelocityAngle = Fw::randomRange(m_pMinVelocityAngle, m_pMaxVelocityAngle);
+                PointF pVelocity(pVelocityAbs * cos(pVelocityAngle), pVelocityAbs * sin(pVelocityAngle));
 
-            // particles initial acceleration
-            float pAccelerationAbs = Fw::randomRange(m_pMinAcceleration, m_pMaxAcceleration);
-            float pAccelerationAngle = Fw::randomRange(m_pMinAccelerationAngle, m_pMaxAccelerationAngle);
-            PointF pAcceleration(pAccelerationAbs * cos(pAccelerationAngle), pAccelerationAbs * sin(pAccelerationAngle));
+                // particles initial acceleration
+                float pAccelerationAbs = Fw::randomRange(m_pMinAcceleration, m_pMaxAcceleration);
+                float pAccelerationAngle = Fw::randomRange(m_pMinAccelerationAngle, m_pMaxAccelerationAngle);
+                PointF pAcceleration(pAccelerationAbs * cos(pAccelerationAngle), pAccelerationAbs * sin(pAccelerationAngle));
 
-            ParticleSystemPtr particleSystem = m_parent.lock();
-            particleSystem->addParticle(ParticlePtr(new Particle(pPosition, pSize, pVelocity, pAcceleration, pDuration, m_pIgnorePhysicsAfter, m_pColor, m_pTexture)));
+                ParticleSystemPtr particleSystem = m_parent.lock();
+                particleSystem->addParticle(ParticlePtr(new Particle(pPosition, pSize, pVelocity, pAcceleration, pDuration, m_pIgnorePhysicsAfter, m_pColors, m_pColorsStops, m_pTexture)));
+            }
         }
+
+        m_currentBurst = currentBurst;
     }
 
-    m_currentBurst = currentBurst;
+    m_elapsedTime += elapsedTime;
 }

src/framework/graphics/particleemitter.h

@@ -47,7 +47,7 @@ private:
     Point m_position;
     float m_duration, m_delay;
     double m_elapsedTime;
-    bool m_finished;
+    bool m_finished, m_active;
     float m_burstRate;
     int m_currentBurst, m_burstCount;
 
@@ -70,7 +70,8 @@ private:
     float m_pMinDuration, m_pMaxDuration, m_pIgnorePhysicsAfter;
 
     // visual ralated
-    Color m_pColor;
+    std::vector<Color> m_pColors;
+    std::vector<float> m_pColorsStops;
     TexturePtr m_pTexture;
 };
 

src/framework/graphics/particlesystem.cpp

@@ -35,7 +35,8 @@ bool ParticleSystem::load(const OTMLNodePtr& node)
     for(const OTMLNodePtr& childNode : node->children()) {
         if(childNode->tag() == "Emitter") {
             ParticleEmitterPtr emitter = ParticleEmitterPtr(new ParticleEmitter(shared_from_this()));
-            emitter->load(childNode);
+            if(!emitter->load(childNode))
+                return false;
             m_emitters.push_back(emitter);
         }
         else if(childNode->tag().find("Affector") != std::string::npos) {
@@ -47,7 +48,8 @@ bool ParticleSystem::load(const OTMLNodePtr& node)
                 affector = ParticleAffectorPtr(new AttractionAffector);
 
             if(affector) {
-                affector->load(childNode);
+                if(!affector->load(childNode))
+                    return false;
                 m_affectors.push_back(affector);
             }
         }