particles duration

src/framework/graphics/particlessystem.cpp

@@ -2,7 +2,7 @@
 #include "graphics.h"
 #include <framework/core/clock.h>
 
-Particle::Particle(const Rect& rect, float vx, float vy, float ax, float ay, const Color& color, TexturePtr texture)
+Particle::Particle(const Rect& rect, float vx, float vy, float ax, float ay, float duration, const Color& color, TexturePtr texture)
 {
     m_rect = rect;
     m_ix = rect.x(); m_iy = rect.y();
@@ -10,6 +10,7 @@ Particle::Particle(const Rect& rect, float vx, float vy, float ax, float ay, con
     m_ax = ax; m_ay = ay;
     m_color = color;
     m_texture = texture;
+    m_duration = duration;
     m_startTicks = g_clock.ticks();
     m_finished = false;
 }
@@ -33,11 +34,18 @@ void Particle::update()
 {
     ticks_t t = g_clock.ticks() - m_startTicks;
 
+    // check if finished
+    if(m_duration > 0 && t > m_duration * 1000) {
+        m_finished = true;
+        return;
+    }
+
+    //update position
     m_rect.moveTo(m_ix + (m_vx * t / 1000.0) + (m_ax * t*t / 2000.0),
                   m_iy + (m_vy * t / 1000.0) + (m_ay * t*t / 2000.0));
 }
 
-Emitter::Emitter(const Point& position, int duration, int particlesPerSecond)
+Emitter::Emitter(const Point& position, float duration, int particlesPerSecond)
 {
     m_position = position;
     m_duration = duration;
@@ -74,10 +82,10 @@ void Emitter::update()
     }
 
     // create some particles
-    int currentParticles = elapsedTicks / 1000.0 * m_particlesPerSecond;
+    int currentParticles = 1 + elapsedTicks / 1000.0 * m_particlesPerSecond;
     for(int i = m_createdParticles; i < currentParticles; ++i) {
         // todo: add random data generation
-        m_particles.push_back(Particle(Rect(100, 100, 16, 16), 16, 8, 0, 0));
+        m_particles.push_back(Particle(Rect(100, 100, 16, 16), 16, 8, 0, 0, 1.5));
     }
     m_createdParticles = currentParticles;
 }
@@ -100,7 +108,6 @@ void ParticlesSystem::update()
             it = m_emitters.erase(it);
             continue;
         }
-
         (*it).update();
         ++it;
     }

src/framework/graphics/particlessystem.h

@@ -4,7 +4,7 @@
 struct Particle {
 public:
 
-    Particle(const Rect& rect, float vx, float vy, float ax, float ay, const Color& color = Color(255, 255, 255), TexturePtr texture = nullptr);
+    Particle(const Rect& rect, float vx, float vy, float ax, float ay, float duration, const Color& color = Color(255, 255, 255), TexturePtr texture = nullptr);
     ~Particle();
 
     void render();
@@ -22,6 +22,7 @@ private:
     Color m_color;
     TexturePtr m_texture;
 
+    float m_duration;
     ticks_t m_startTicks;
     bool m_finished;
 };
@@ -29,7 +30,7 @@ private:
 class Emitter {
 public:
 
-    Emitter(const Point& position, int duration, int particlesPerSecond);
+    Emitter(const Point& position, float duration, int particlesPerSecond);
 
     void render();
     void update();