Refactor rendering

frontend/src/shaders/cave-distance-fs.glsl

@@ -1,48 +0,0 @@
-#version 300 es
-
-precision mediump float;
-
-#define LINES_ENABLED {linesEnabled}
-#define LINE_COUNT {lineCount}
-#define CAVE_COLOR vec3(0.36, 0.38, 0.76)
-#define AIR_COLOR vec3(0.7)
-#define DISTANCE_SCALE {distanceScale}
-#define EDGE_SMOOTHING {edgeSmoothing}
- 
-uniform float maxMinDistance; 
-
-#if LINES_ENABLED
-    // start, end - start
-    uniform vec2[LINE_COUNT * 2] lines;
-    // startRadius, endRadius
-    uniform float[LINE_COUNT * 2] radii;
-#endif
-
-in vec2 worldCoordinates;
-out vec4 fragmentColor;
-
-void main() {
-    #if LINES_ENABLED
-        float minDistance = maxMinDistance;
-
-        for (int i = 0; i < LINE_COUNT; i++) {
-            vec2 pa = worldCoordinates - lines[2 * i];
-            vec2 ba = lines[2 * i + 1];
-            float baLength = length(ba);
-            // todo: do we really want this dot(pa / baLength, ba / baLength)
-            float h = clamp(dot(pa / baLength, ba / baLength), 0.0, 1.0);
-            float lineDistance = distance(pa, ba * h) - mix(radii[2 * i], radii[2 * i + 1], h);
-
-            minDistance = min(minDistance, lineDistance);
-        }
-
-        float distance = -minDistance;
-        fragmentColor = vec4(
-            mix(CAVE_COLOR, AIR_COLOR, clamp(distance, -EDGE_SMOOTHING, 0.0) / EDGE_SMOOTHING + 1.0),
-            distance / DISTANCE_SCALE
-        );
-    #else
-
-        fragmentColor = vec4(AIR_COLOR, maxMinDistance / DISTANCE_SCALE);
-    #endif
-}