55 lines
1.4 KiB
HLSL
55 lines
1.4 KiB
HLSL
struct vs_input {
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float4 pos : POSITION;
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float4 col : COLOR;
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float line_thickness : THICKNESS;
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float line_spacing : SPACING;
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float2 offset : OFFSET;
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};
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struct ps_input {
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float4 screen_pos : SV_POSITION;
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float4 col : COLOR;
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float line_thickness : THICKNESS;
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float line_spacing : SPACING;
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float2 offset : OFFSET;
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};
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cbuffer vs_constants : register(b0)
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{
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float4x4 projection;
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};
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ps_input vs_main(vs_input input)
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{
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ps_input output;
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output.screen_pos = mul(projection, float4(input.pos.xy, 0.f, 1.f));
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output.col = input.col;
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output.line_thickness = input.line_thickness;
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output.line_spacing = input.line_spacing;
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output.offset = input.offset;
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return output;
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}
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float4 ps_main(ps_input input) : SV_TARGET
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{
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float2 screen_pos = input.screen_pos.xy + input.offset;
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float half_thickness = input.line_thickness / 2;
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float spacing = input.line_spacing;
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float4 color = 0;
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float2 v = abs(round(screen_pos / spacing) * spacing - screen_pos);
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float dist = min(v.x, v.y);
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color = input.col * step(dist, half_thickness);
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if (screen_pos.y <= half_thickness && screen_pos.y >= -half_thickness) {
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color.r = 1;
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}
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if (screen_pos.x <= half_thickness && screen_pos.x >= -half_thickness) {
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color.g = 1;
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}
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return color;
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}
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