23 lines
842 B
HLSL
23 lines
842 B
HLSL
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// PS_INPUT is defined in the default shader in gfx_impl_d3d11.c at the bottom of the file
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// BEWARE std140 packing:
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// https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-packing-rules
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cbuffer some_cbuffer : register(b0) {
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float2 mouse_pos_screen; // In pixels
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float2 window_size;
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}
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float4 pixel_shader_extension(PS_INPUT input, float4 color) {
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const float light_distance = 500;
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float2 vertex_pos = input.position_screen.xy; // In pixels
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vertex_pos.y = window_size.y-vertex_pos.y; // For some reason d3d11 inverts the Y here so we need to revert it
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// Simple linear attenuation based on distance
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float attenuation = 1.0 - (length(mouse_pos_screen - vertex_pos) / light_distance);
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float4 light = float4(attenuation, attenuation, attenuation, 1.0);
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return color * light;
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}
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