87 lines
2.0 KiB
HLSL
87 lines
2.0 KiB
HLSL
struct VSInput
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{
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float3 Position : POSITION0;
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float3 Normal : NORMAL0;
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float3 Texture : TEXCOORD0;
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};
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struct VSOutput
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{
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float4 Position : SV_POSITION;
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float3 Normal : NORMAL0;
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float2 Texture : TEXCOORD0;
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float3 LightDirection : NORMAL1;
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float3 ViewDirection : NORMAL2;
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nointerpolation int MaterialIndex : materialindex;
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};
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struct Node
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{
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column_major float4x4 ModelView;
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};
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struct Scene
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{
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column_major float4x4 Projection;
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float4 LightPosition; // view space
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};
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struct MaterialColor
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{
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float4 Emission;
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float4 Ambient;
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float4 Diffuse;
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float4 Specular;
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};
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// set 0: per-frame
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[[vk::binding(0, 0)]] ConstantBuffer<Scene> Scene;
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[[vk::binding(1, 0)]] StructuredBuffer<Node> Nodes;
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// set 1: constant
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[[vk::binding(0, 1)]] StructuredBuffer<MaterialColor> MaterialColors;
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struct PushConstant {
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int NodeIndex;
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int MaterialIndex;
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};
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[[vk::push_constant]]
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struct PushConstant constants;
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[shader("vertex")]
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VSOutput VSMain(VSInput input)
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{
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float4x4 modelView = Nodes[constants.NodeIndex].ModelView;
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VSOutput output = (VSOutput)0;
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output.Position = mul(Scene.Projection, mul(modelView, float4(input.Position.xyz, 1.0))) * float4(-1, -1, 1, 1);
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output.Normal = mul((float3x3)modelView, input.Normal);
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output.Texture = input.Texture.xy * 1.0;
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float4 viewPosition = mul(modelView, float4(input.Position.xyz, 1.0));
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output.LightDirection = (Scene.LightPosition - viewPosition).xyz;
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output.ViewDirection = -viewPosition.xyz;
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return output;
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}
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[shader("pixel")]
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float4 PSMain(VSOutput input) : SV_TARGET
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{
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//float3 color = texture.Sample(samplers[0], input.Texture).bgr;
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float4 diffuseColor = MaterialColors[constants.MaterialIndex].Diffuse;
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float3 N = normalize(input.Normal);
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float3 L = normalize(input.LightDirection);
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float3 V = normalize(input.ViewDirection);
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float3 R = reflect(-L, N);
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const float a = 16.0;
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const float specularIntensity = 0.8;
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float3 specular = pow(max(dot(R, V), 0), a) * specularIntensity;
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float3 diffuse = max(dot(N, L), 0.001);
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return float4(diffuse * diffuseColor.xyz + specular, 1.0);
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}
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