53 lines
1.3 KiB
Plaintext
53 lines
1.3 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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};
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struct VertexShaderOutput {
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float4 pos : SV_POSITION;
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uint selected;
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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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[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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if ((flags & 0x1) != 0)
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tile_pos -= float2(0.5, 0.5);
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output.pos = mul(view_projection_matrix, float4(tile_pos + input.pos.xy, 0, 1));
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int2 pos = int2(input.instance_id % map_width, int(input.instance_id / map_width));
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int2 selection_min = min(drag_start, mouse);
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int2 selection_max = max(drag_start, mouse);
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output.selected = select(all(pos >= selection_min) && all(pos <= selection_max), 1, 0);
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return output;
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}
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[[vk::binding(0, 3)]]
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cbuffer fragment_constants {
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float4 tint;
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float4 selected_tint;
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}
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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 = select(input.selected != 0, selected_tint, tint);
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return output;
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}
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