revert to vanilla assets

public/assets/minecraft/shaders/post/rotscale.vsh

@@ -0,0 +1,31 @@
+#version 330
+
+layout(std140) uniform SamplerInfo {
+    vec2 OutSize;
+    vec2 InSize;
+};
+
+layout(std140) uniform RotScaleConfig {
+    vec2 InScale;
+    vec2 InOffset;
+    float InRotation;
+};
+
+out vec2 texCoord;
+out vec2 scaledCoord;
+
+void main(){
+    vec2 uv = vec2((gl_VertexID << 1) & 2, gl_VertexID & 2);
+    vec4 pos = vec4(uv * vec2(2, 2) + vec2(-1, -1), 0, 1);
+
+    gl_Position = pos;
+    texCoord = uv;
+
+    float Deg2Rad = 0.0174532925;
+    float InRadians = InRotation * Deg2Rad;
+    float Cosine = cos(InRadians);
+    float Sine = sin(InRadians);
+    float RotU = texCoord.x * Cosine - texCoord.y * Sine;
+    float RotV = texCoord.y * Cosine + texCoord.x * Sine;
+    scaledCoord = vec2(RotU, RotV) * InScale + InOffset;
+}