feat: added multithreading

source/shader/fragment.glsl

@@ -4,7 +4,10 @@ in vec4 vColor;
 out vec4 FragColor;
 
 void main() {
+    // Soft circular point — discard corners to make round dots
+    vec2 coord = gl_PointCoord - vec2(0.5);
+    if (dot(coord, coord) > 0.25)
+        discard;
+
     FragColor = vColor;
 }
-
-

source/shader/vertex.glsl

@@ -1,18 +1,26 @@
 #version 330 core
-layout(location = 0) in vec3 aPos; // Position
-layout(location = 1) in vec4 aColor; // Color (RGBA)
-layout(location = 2) in float aLife; // Life
+layout(location = 0) in vec3 aPos;
+layout(location = 1) in vec4 aColor;
+layout(location = 2) in float aLife;
+layout(location = 4) in float size;
 
 out vec4 vColor;
 
+uniform mat4 uMVP;
+uniform float uScreenHeight;
+
 void main() {
-    float alpha = aLife;
-    if (aLife > 0.0) {
-        alpha = aLife / 10.0; // Fade mortal particles
-    } else if (aLife < 0.0) {
-        alpha = 1.0; // Eternal particles are fully opaque
+    float alpha;
+    if (aLife < 0.0) {
+        alpha = 1.0;               // immortal — fully opaque
+    } else {
+        alpha = clamp(aLife / 2.0, 0.0, 1.0); // fade over last 2 seconds of life
     }
+
     vColor = vec4(aColor.rgb, aColor.a * alpha);
-    gl_Position = vec4(aPos, 1.0);
-    gl_PointSize = 10.0; // Make them big enough to see!
+    vec4 clip_pos = uMVP * vec4(aPos, 1.0);
+    gl_Position = clip_pos;
+
+    float base_size = 0.2 + size;
+    gl_PointSize = max(1.0, base_size / clip_pos.w);
 }