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SaschaWillemsSaschaWillems
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Add slang shader for texturing samples
1 parent b6b4fcc commit 5484d51

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‎shaders/slang/texture/texture.slang‎

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/* Copyright (c) 2025, Sascha Willems
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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struct VSInput
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{
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float3 Pos;
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float2 UV;
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float3 Normal;
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};
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struct VSOutput
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{
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float4 Pos : SV_POSITION;
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float2 UV;
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float LodBias;
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float3 Normal;
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float3 ViewVec;
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float3 LightVec;
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};
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struct UBO
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{
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float4x4 projection;
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float4x4 model;
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float4 viewPos;
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float lodBias;
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};
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ConstantBuffer<UBO> ubo;
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Sampler2D samplerColor;
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[shader("vertex")]
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VSOutput vertexMain(VSInput input)
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{
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VSOutput output;
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output.UV = input.UV;
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output.LodBias = ubo.lodBias;
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float3 worldPos = mul(ubo.model, float4(input.Pos, 1.0)).xyz;
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output.Pos = mul(ubo.projection, mul(ubo.model, float4(input.Pos.xyz, 1.0)));
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float4 pos = mul(ubo.model, float4(input.Pos, 1.0));
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output.Normal = mul((float3x3)ubo.model, input.Normal);
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float3 lightPos = float3(0.0, 0.0, 0.0);
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float3 lPos = mul((float3x3)ubo.model, lightPos.xyz);
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output.LightVec = lPos - pos.xyz;
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output.ViewVec = ubo.viewPos.xyz - pos.xyz;
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return output;
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}
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[shader("fragment")]
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float4 fragmentMain(VSOutput input)
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{
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float4 color = samplerColor.SampleLevel(input.UV, input.LodBias);
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float3 N = normalize(input.Normal);
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float3 L = normalize(input.LightVec);
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float3 V = normalize(input.ViewVec);
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float3 R = reflect(-L, N);
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float3 diffuse = max(dot(N, L), 0.0) * float3(1.0, 1.0, 1.0);
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float specular = pow(max(dot(R, V), 0.0), 16.0) * color.a;
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return float4(diffuse * color.rgb + specular, 1.0);
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}

‎shaders/slang/texture3d/texture3d.slang‎

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/* Copyright (c) 2025, Sascha Willems
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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struct VSInput
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{
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float3 Pos;
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float2 UV;
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float3 Normal;
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};
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struct VSOutput
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{
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float4 Pos : SV_POSITION;
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float3 UV;
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float3 Normal;
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float3 ViewVec;
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float3 LightVec;
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};
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struct UBO
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{
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float4x4 projection;
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float4x4 model;
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float4 viewPos;
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float depth;
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};
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ConstantBuffer<UBO> ubo;
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Sampler3D samplerColor;
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[shader("vertex")]
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VSOutput vertexMain(VSInput input)
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{
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VSOutput output;
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output.UV = float3(input.UV, ubo.depth);
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float3 worldPos = mul(ubo.model, float4(input.Pos, 1.0)).xyz;
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output.Pos = mul(ubo.projection, mul(ubo.model, float4(input.Pos.xyz, 1.0)));
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float4 pos = mul(ubo.model, float4(input.Pos, 1.0));
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output.Normal = mul((float3x3)ubo.model, input.Normal);
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float3 lightPos = float3(0.0, 0.0, 0.0);
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float3 lPos = mul((float3x3)ubo.model, lightPos.xyz);
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output.LightVec = lPos - pos.xyz;
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output.ViewVec = ubo.viewPos.xyz - pos.xyz;
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return output;
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}
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[shader("fragment")]
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float4 fragmentMain(VSOutput input)
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{
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float4 color = samplerColor.Sample(input.UV);
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float3 N = normalize(input.Normal);
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float3 L = normalize(input.LightVec);
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float3 V = normalize(input.ViewVec);
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float3 R = reflect(-L, N);
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float3 diffuse = max(dot(N, L), 0.0) * float3(1.0, 1.0, 1.0);
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float specular = pow(max(dot(R, V), 0.0), 16.0) * color.r;
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return float4(diffuse * color.r + specular, 1.0);
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}

‎shaders/slang/texturearray/instancing.slang‎

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/* Copyright (c) 2025, Sascha Willems
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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struct VSInput
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{
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float3 Pos;
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float2 UV;
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};
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struct VSOutput
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{
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float4 Pos : SV_POSITION;
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float3 UV;
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};
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struct Instance
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{
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float4x4 model;
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float arrayIndex;
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};
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struct UBO
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{
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float4x4 projection;
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float4x4 view;
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Instance instance[8];
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};
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ConstantBuffer<UBO> ubo;
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Sampler2DArray samplerArray;
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[shader("vertex")]
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VSOutput vertexMain(VSInput input, uint InstanceIndex: SV_InstanceID)
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{
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VSOutput output;
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output.UV = float3(input.UV, ubo.instance[InstanceIndex].arrayIndex);
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float4x4 modelView = mul(ubo.view, ubo.instance[InstanceIndex].model);
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output.Pos = mul(ubo.projection, mul(modelView, float4(input.Pos, 1.0)));
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return output;
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}
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[shader("fragment")]
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float4 fragmentMain(VSOutput input)
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{
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return samplerArray.Sample(input.UV);
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}

‎shaders/slang/texturecubemap/reflect.slang‎

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/* Copyright (c) 2025, Sascha Willems
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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struct VSInput
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{
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float3 Pos;
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float3 Normal;
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};
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struct VSOutput
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{
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float4 Pos : SV_POSITION;
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float3 WorldPos;
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float3 Normal;
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float LodBias;
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float3 ViewVec;
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float3 LightVec;
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};
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struct UBO
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{
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float4x4 projection;
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float4x4 model;
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float4x4 invModel;
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float lodBias;
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};
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ConstantBuffer<UBO> ubo;
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SamplerCube samplerColor;
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[shader("vertex")]
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VSOutput vertexMain(VSInput input)
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{
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VSOutput output;
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output.Pos = mul(ubo.projection, mul(ubo.model, float4(input.Pos.xyz, 1.0)));
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output.WorldPos = mul(ubo.model, float4(input.Pos, 1.0)).xyz;
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output.Normal = mul((float3x3)ubo.model, input.Normal);
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output.LodBias = ubo.lodBias;
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float3 lightPos = float3(0.0f, -5.0f, 5.0f);
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output.LightVec = lightPos.xyz - output.WorldPos.xyz;
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output.ViewVec = -output.WorldPos;
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return output;
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}
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[shader("fragment")]
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float4 fragmentMain(VSOutput input) : SV_TARGET
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{
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float3 cI = normalize (input.ViewVec);
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float3 cR = reflect (cI, normalize(input.Normal));
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cR = mul(ubo.invModel, float4(cR, 0.0)).xyz;
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// Convert cubemap coordinates into Vulkan coordinate space
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cR.z *= -1.0;
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float4 color = samplerColor.SampleLevel(cR, input.LodBias);
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float3 N = normalize(input.Normal);
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float3 L = normalize(input.LightVec);
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float3 V = normalize(input.ViewVec);
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float3 R = reflect(-L, N);
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float3 ambient = float3(0.5, 0.5, 0.5) * color.rgb;
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float3 diffuse = max(dot(N, L), 0.0) * float3(1.0, 1.0, 1.0);
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float3 specular = pow(max(dot(R, V), 0.0), 16.0) * float3(0.5, 0.5, 0.5);
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return float4(ambient + diffuse * color.rgb + specular, 1.0);
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}

‎shaders/slang/texturecubemap/skybox.slang‎

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/* Copyright (c) 2025, Sascha Willems
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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struct VSInput
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{
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float3 Pos;
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};
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struct VSOutput
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{
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float4 Pos : SV_POSITION;
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float3 UVW;
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};
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struct UBO
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{
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float4x4 projection;
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float4x4 model;
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};
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ConstantBuffer<UBO> ubo;
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SamplerCube samplerCubeMap;
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[shader("vertex")]
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VSOutput vertexMain(VSInput input)
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{
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VSOutput output;
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output.UVW = input.Pos;
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// Convert cubemap coordinates into Vulkan coordinate space
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output.UVW.xy *= -1.0;
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// Remove translation from view matrix
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float4x4 viewMat = ubo.model;
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viewMat[0][3] = 0.0;
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viewMat[1][3] = 0.0;
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viewMat[2][3] = 0.0;
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output.Pos = mul(ubo.projection, mul(viewMat, float4(input.Pos.xyz, 1.0)));
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return output;
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}
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[shader("fragment")]
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float4 fragmentMain(VSOutput input)
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{
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return samplerCubeMap.Sample(input.UVW);
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}

‎shaders/slang/texturecubemaparray/reflect.slang‎

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/* Copyright (c) 2025, Sascha Willems
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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struct VSInput
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{
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float3 Pos;
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float3 Normal;
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};
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struct VSOutput
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{
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float4 Pos : SV_POSITION;
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float3 WorldPos;
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float3 Normal;
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float3 ViewVec;
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float3 LightVec;
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};
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struct UBO
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{
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float4x4 projection;
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float4x4 model;
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float4x4 invModel;
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float lodBias;
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int cubeMapIndex;
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};
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ConstantBuffer<UBO> ubo;
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SamplerCubeArray samplerCubeMapArray;
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[shader("vertex")]
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VSOutput vertexMain(VSInput input)
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{
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VSOutput output;
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output.Pos = mul(ubo.projection, mul(ubo.model, float4(input.Pos.xyz, 1.0)));
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output.WorldPos = mul(ubo.model, float4(input.Pos, 1.0)).xyz;
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output.Normal = mul((float3x3)ubo.model, input.Normal);
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float3 lightPos = float3(0.0f, -5.0f, 5.0f);
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output.LightVec = lightPos.xyz - output.WorldPos.xyz;
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output.ViewVec = -output.WorldPos;
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return output;
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}
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[shader("fragment")]
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float4 fragmentMain(VSOutput input)
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{
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float3 cI = normalize(input.WorldPos.xyz);
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float3 cR = reflect(cI, normalize(input.Normal));
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cR = mul(ubo.invModel, float4(cR, 0.0)).xyz;
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cR.yz *= -1.0;
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float4 color = samplerCubeMapArray.SampleLevel(float4(cR, ubo.cubeMapIndex), ubo.lodBias);
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float3 N = normalize(input.Normal);
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float3 L = normalize(input.LightVec);
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float3 V = normalize(input.ViewVec);
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float3 R = reflect(-L, N);
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float3 ambient = float3(0.5, 0.5, 0.5) * color.rgb;
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float3 diffuse = max(dot(N, L), 0.0) * float3(1.0, 1.0, 1.0);
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float3 specular = pow(max(dot(R, V), 0.0), 16.0) * float3(0.5, 0.5, 0.5);
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return float4(ambient + diffuse * color.rgb + specular, 1.0);
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}

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