Init

assets/shaders/circleFragment.glsl

@@ -0,0 +1,19 @@
+#version 330 core
+out vec4 FragColor;
+
+varying vec2 val;
+
+void main() {
+    float radius  = 1.0f;
+    float radius2 = 0.5f;
+    float smoothing = 0.005f;
+    float dist = sqrt(dot(val,val));
+
+    if (dist > radius || dist < radius2) {
+        discard;
+    }
+    float sm  = smoothstep(radius,  radius  - smoothing, dist);
+    float sm2 = smoothstep(radius2, radius2 + smoothing, dist);
+    float alpha = sm * sm2;
+    FragColor = vec4(1.0, 0.0, 0.0, alpha);
+}