WORKING FIXED POINT

src/client/render/tile/compute.wgsl

@@ -0,0 +1,35 @@
+
+@fragment
+fn fs_main(
+    in: VertexOutput,
+) -> @location(0) vec4<f32> {
+    let dec = i32(1) << 13;
+    let c = vec2<i32>(in.world_pos * f32(dec));
+    let cx = c.x;
+    let cy = c.y;
+    var x = 0;
+    var y = 0;
+    var i = 0u;
+    let thresh = 2 * dec;
+    let thresh2 = thresh * thresh;
+    let max = 50u;
+    loop {
+        let x2 = x * x;
+        let y2 = y * y;
+        if x2 + y2 > thresh2 || i >= max {
+            break;
+        }
+        y = (2 * x * y) / dec + c.y;
+        x = (x2 - y2) / dec + c.x;
+        i += 1u;
+    }
+    var color = vec3<f32>(0.0, 0.0, 0.0);
+    if i != max {
+        let pi = 3.1415;
+        let hue = f32(i) / 30.0;
+        color.r = cos(hue);
+        color.g = cos(hue - 2.0 * pi / 3.0);
+        color.b = cos(hue - 4.0 * pi / 3.0);
+    }
+    return vec4(color, 1.0);
+}