Refactor rendering

frontend/src/scripts/drawing/shaders/passthrough-shading-vs.glsl

@@ -0,0 +1,39 @@
+#version 300 es
+
+precision mediump float;
+
+#define LIGHT_COUNT {lightCount}
+
+uniform mat3 modelTransform;
+uniform mat3 ndcToUv;
+uniform mat3 uvToWorld;
+
+in vec4 vertexPosition;
+
+out vec2 worldCoordinates;
+out vec2 uvCoordinates;
+
+#if LIGHT_COUNT > 0
+    uniform struct Light {
+        vec2 center;
+        float radius;
+        vec3 value;
+    }[LIGHT_COUNT] lights;
+
+    out vec2[LIGHT_COUNT] directions;
+#endif
+
+void main() {
+    vec3 vertexPosition2D = vec3(vertexPosition.xy, 1.0) * modelTransform;
+    vec3 uvCoordinates1 = vertexPosition2D * ndcToUv;
+    worldCoordinates = (uvCoordinates1 * uvToWorld).xy;
+    uvCoordinates = (uvCoordinates1).xy;
+
+    #if LIGHT_COUNT > 0
+        for (int i = 0; i < LIGHT_COUNT; i++) {
+            directions[i] = lights[i].center - worldCoordinates;
+        }
+    #endif
+
+    gl_Position = vec4(vertexPosition2D.xy, 0.0, 1.0);
+}