Initial commit

src/com/persesgames/jogl/explosion/explosionCleanUp.comp

@@ -0,0 +1,36 @@
+#version 430 core
+#define pi 3.141592653589793238462643383279
+
+precision mediump float;
+precision mediump int;
+
+struct explosion {
+        vec4        positionVelocity;
+        vec4        color;
+};
+
+layout (std430, binding = 0) buffer entities {
+    explosion   e[];
+};
+
+layout(binding = 1, offset = 0) uniform atomic_uint lastCounter;
+
+layout (local_size_x = 512) in;
+
+void main() {
+    uint gid = gl_GlobalInvocationID.x;
+    uint last = atomicCounter(lastCounter);
+
+    if (gid < last && last > 0) {
+        vec4 color = e[gid].color;
+
+        if (color.a == 0.0) {
+            uint old = atomicCounterDecrement(lastCounter);
+
+            e[gid].positionVelocity = e[old].positionVelocity;
+            e[gid].color = e[old].color;
+
+            e[old].color.a = 0;
+        }
+    }
+}