remove rotation from world tiles and instead apply it on load into atlas

src/shaders/world.wgsl

@@ -8,7 +8,7 @@ struct VertexShaderInput {
     // Per Instance
     @builtin(instance_index) instance_index: u32,
 
-    @location(2) tile_info: u32,
+    @location(2) tile: u32,
 };
 
 struct VertexShaderOutput {
@@ -36,21 +36,11 @@ struct Per_Frame_Data {
 @vertex fn main_vertex(input: VertexShaderInput) -> VertexShaderOutput {
     var output: VertexShaderOutput;
 
-    let tile_type = extractBits(input.tile_info,  0, 16);
-    let rotation  = extractBits(input.tile_info, 16,  2);  
-
     let tile_pos = vec2<f32>(f32(input.instance_index % per_frame.map_width), f32(input.instance_index / per_frame.map_width)) - vec2<f32>(0.5, 0.5);
 
-    output.tile = tile_type;
+    output.tile = input.tile;
     output.pos  = vec4<f32>(tile_pos + input.pos.xy, 0, 1) * view_projection_matrix;
-
-    switch (rotation) {
-        case 0: { output.uv = vec2<f32>(      input.uv.x,       input.uv.y); }
-        case 1: { output.uv = vec2<f32>(1.0 - input.uv.y,       input.uv.x); }
-        case 2: { output.uv = vec2<f32>(1.0 - input.uv.x, 1.0 - input.uv.y); }
-        case 3: { output.uv = vec2<f32>(      input.uv.y, 1.0 - input.uv.x); }
-        default: {}
-    }
+    output.uv   = input.uv;
 
     return output;
 }