Added proper size distribtion on explosion

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

projects/fire_works/shaders/generation.comp

@@ -73,6 +73,7 @@ void main() {
     }
 
     vec3 velocity = normalize(direction) * events[event_id].velocity;
+    float size = events[event_id].size;
 
     if (events[event_id].parent < events.length()) {
         const uint spawnId = events[events[event_id].parent].pad0;
@@ -80,12 +81,15 @@ void main() {
         if (spawnId < particles.length()) {
             particles[id].position = particles[spawnId].position;
             velocity += particles[spawnId].velocity;
+            size = particles[spawnId].size;
         }
     }
 
+    const float split = pow(1.0f / events[event_id].count, 1.0f / 3.0f);
+
     particles[id].lifetime = events[event_id].lifetime;
     particles[id].velocity = velocity;
-    particles[id].size = events[event_id].size;
+    particles[id].size = size * split;
     particles[id].color = events[event_id].color;
     particles[id].mass = events[event_id].mass / events[event_id].count;
 

projects/fire_works/shaders/motion.comp

@@ -16,6 +16,7 @@ layout( push_constant ) uniform constants{
 };
 
 const float g = 9.81;
+const float friction = 0.001f;
 
 void main() {
     uint id = gl_GlobalInvocationID.x;
@@ -34,8 +35,10 @@ void main() {
         lifetime = 0.0f;
     }
 
+    const float fading = 1.0f / (1.0f + friction);
+
     position = position + velocity * dt;
-    velocity = velocity + vec3(0.0f, -g, 0.0f) * dt;
+    velocity = velocity * fading + vec3(0.0f, -g, 0.0f) * dt;
 
     particles[id].position = position;
     particles[id].lifetime = lifetime;

projects/fire_works/src/main.cpp

@@ -174,7 +174,7 @@ int main(int argc, const char **argv) {
 		
 		1.0f,
 		1.0f,
-		0.1f,
+		0.5f,
 		0.0f
 	);
 	
@@ -191,7 +191,7 @@ int main(int argc, const char **argv) {
 		
 		10.0f,
 		1.0f,
-		0.05f,
+		0.0f,
 		0.0f
 	);