luboslenco
29 lines
1.4 KiB
TypeScript
29 lines
1.4 KiB
TypeScript
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function make_brush_run(kong: node_shader_t) {
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node_shader_write_frag(kong, "var dist: float = 0.0;");
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if (config_raw.brush_3d) {
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node_shader_write_frag(kong, "var depth: float = sample_lod(gbufferD, gbufferD_sampler, inp.xy, 0.0).r;");
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node_shader_add_constant(kong, "invVP: float4x4", "_inv_view_proj_matrix");
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node_shader_write_frag(kong, "var winp: float4 = float4(float2(inp.x, 1.0 - inp.y) * 2.0 - 1.0, depth * 2.0 - 1.0, 1.0);");
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node_shader_write_frag(kong, "winp = constants.invVP * winp;");
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node_shader_write_frag(kong, "winp.xyz /= winp.w;");
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node_shader_add_constant(kong, "W: float4x4", "_world_matrix");
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node_shader_write_attrib_frag(kong, "var wposition: float3 = (constants.W * texpaint_undo[int2(tex_coord.x * textureSize(texpaint_undo, 0).x, tex_coord.y * textureSize(texpaint_undo, 0).y)]).xyz;");
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node_shader_write_frag(kong, "var depthlast: float = sample_lod(gbufferD, gbufferD_sampler, constants.inplast.xy, 0.0).r;");
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node_shader_write_frag(kong, "var winplast: float4 = float4(float2(constants.inplast.x, 1.0 - constants.inplast.y) * 2.0 - 1.0, depthlast * 2.0 - 1.0, 1.0);");
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node_shader_write_frag(kong, "winplast = constants.invVP * winplast;");
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node_shader_write_frag(kong, "winplast.xyz /= winplast.w;");
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node_shader_write_frag(kong, "dist = distance(wposition, winp.xyz);");
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}
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node_shader_write_frag(kong, "if (dist > constants.brush_radius) { discard; }");
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}
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