85 lines
2.4 KiB
Plaintext
85 lines
2.4 KiB
Plaintext
#include "common.slang"
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struct VertexShaderInput {
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// Per Vertex
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uint vertex_id : SV_VertexID;
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float3 pos;
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// Per Instance
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uint instance_id : SV_InstanceID;
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uint tile_info;
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};
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struct VertexShaderOutput {
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float4 pos : SV_POSITION;
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float2 uv;
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};
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struct PixelShaderOutput {
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float4 color : SV_TARGET;
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};
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[[vk::binding(0, 0)]]
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StructuredBuffer<float4> tile_infos;
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[shader("vertex")]
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VertexShaderOutput main_vertex(VertexShaderInput input) {
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VertexShaderOutput output;
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float2 tile_pos = float2(input.instance_id % map_width, float(input.instance_id / map_width));
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uint tile_type = input.tile_info & 0xffff;
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uint rotation = (input.tile_info >> 16) & 0x3;
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float4x4 view_matrix = view(float3(camera_x, camera_y, 0), radians(camera_tilt), camera_distance);
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float4x4 projection_matrix = projection(radians(fovy_degrees), aspect_ratio, NEAR_PLANE);
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float4x4 view_projection_matrix = mul(projection_matrix, view_matrix);
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output.pos = mul(view_projection_matrix, float4(tile_pos + input.pos.xy, 0, 1));
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float4 uv_min_max = tile_infos.Load(tile_type);
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switch (rotation) {
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case 0: switch (input.vertex_id) {
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case 0: output.uv = uv_min_max.xy; break;
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case 1: output.uv = uv_min_max.zy; break;
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case 2: output.uv = uv_min_max.zw; break;
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case 3: output.uv = uv_min_max.xw; break;
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} break;
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case 1: switch (input.vertex_id) {
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case 0: output.uv = uv_min_max.zy; break;
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case 1: output.uv = uv_min_max.zw; break;
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case 2: output.uv = uv_min_max.xw; break;
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case 3: output.uv = uv_min_max.xy; break;
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} break;
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case 2: switch (input.vertex_id) {
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case 0: output.uv = uv_min_max.zw; break;
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case 1: output.uv = uv_min_max.xw; break;
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case 2: output.uv = uv_min_max.xy; break;
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case 3: output.uv = uv_min_max.zy; break;
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} break;
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case 3: switch (input.vertex_id) {
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case 0: output.uv = uv_min_max.xw; break;
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case 1: output.uv = uv_min_max.xy; break;
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case 2: output.uv = uv_min_max.zy; break;
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case 3: output.uv = uv_min_max.zw; break;
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} break;
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}
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return output;
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}
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[[vk::binding(0, 2)]]
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Sampler2D<float4> tex1;
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[shader("fragment")]
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PixelShaderOutput main_fragment(VertexShaderOutput input) {
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PixelShaderOutput output;
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output.color = tex1.Sample(float2(input.uv));
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return output;
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}
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