Add more improvements

src/graphics/shaders/distance-fs.glsl

@@ -1,103 +0,0 @@
-#version 300 es
-
-precision lowp float;
-
-#define SURFACE_OFFSET 0.001
- 
-uniform float maxMinDistance;
-uniform float distanceNdcPixelSize;
-in vec2 position;
-
-{macroDefinitions}
-
-{declarations}
-
-/*
-#if LINE_COUNT > 0
-    uniform struct {
-        vec2 from;
-        vec2 toFromDelta;
-        float fromRadius;
-        float toRadius;
-    }[LINE_COUNT] lines;
-
-    void lineMinDistance(inout float minDistance, inout float color) {
-        float myMinDistance = maxMinDistance;
-        for (int i = 0; i < LINE_COUNT; i++) {
-            vec2 targetFromDelta = position - lines[i].from;
-            vec2 toFromDelta = lines[i].toFromDelta;
-            
-            float h = clamp(
-                dot(targetFromDelta, toFromDelta) / dot(toFromDelta, toFromDelta),
-                0.0, 1.0
-            );
-
-            float lineDistance = -mix(
-                lines[i].fromRadius, lines[i].toRadius, h
-            ) + distance(
-                targetFromDelta, toFromDelta * h
-            );
-
-            myMinDistance = min(myMinDistance, lineDistance);
-        }
-
-        color = mix(0.0, color, step(distanceNdcPixelSize + SURFACE_OFFSET, -myMinDistance));
-        minDistance = -myMinDistance;
-    }
-#endif
-#if BLOB_COUNT > 0
-    uniform struct {
-        vec2 headCenter;
-        vec2 leftFootCenter;
-        vec2 rightFootCenter;
-        float headRadius;
-        float footRadius;
-        float k;
-    }[BLOB_COUNT] blobs;
-
-    float smoothMin(float a, float b)
-    {
-        const float k = 2.0;
-        
-        a = pow(a, k);
-        b = pow(b, k);
-        return pow((a * b) / (a + b), 1.0 / k);
-    }
-
-    float circleMinDistance(vec2 circleCenter, float radius) {
-        return distance(position, circleCenter) - radius;
-    }
-
-    void blobMinDistance(inout float minDistance, inout float color) {
-        for (int i = 0; i < BLOB_COUNT; i++) {
-            float headDistance = circleMinDistance(blobs[i].headCenter, blobs[i].headRadius);
-            float leftFootDistance = circleMinDistance(blobs[i].leftFootCenter, blobs[i].footRadius);
-            float rightFootDistance = circleMinDistance(blobs[i].rightFootCenter, blobs[i].footRadius);
-
-            float res = min(
-                smoothMin(headDistance, leftFootDistance),
-                smoothMin(headDistance, rightFootDistance)
-            );
-
-            res = min(100.0, headDistance);
-            res = min(res, leftFootDistance);
-            res = min(res, rightFootDistance);
-            //color = mix(2.0, color, step(distanceUvPixelSize + SURFACE_OFFSET, res));
-            minDistance = min(minDistance, res);
-            color = mix(2.0, color, step(distanceNdcPixelSize + SURFACE_OFFSET, res));
-        }
-    }
-#endif
-*/
-
-out vec2 fragmentColor;
-
-void main() {
-    float minDistance = 10.0; //-maxMinDistance;
-    float color = 1.0;
-
-    {functionCalls}
-
-    // minDistance / 2.0: NDC to UV scale
-    fragmentColor = vec2(minDistance / 2.0, color);
-}