tooll3--t3
wehub-resource-sync
96 行
5.0 KiB
HLSL
96 行
5.0 KiB
HLSL
#include "shared/pbr.hlsl"
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cbuffer Transforms : register(b0)
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{
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float4x4 CameraToClipSpace;
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float4x4 ClipSpaceToCamera;
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float4x4 WorldToCamera;
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float4x4 CameraToWorld;
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float4x4 WorldToClipSpace;
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float4x4 ClipSpaceToWorld;
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float4x4 ObjectToWorld;
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float4x4 WorldToObject;
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float4x4 ObjectToCamera;
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float4x4 ObjectToClipSpace;
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};
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struct PsInput
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{
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float4 posInClipSpace : SV_POSITION;
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float3 posInWorld : POS;
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};
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sampler texSampler : register(s0);
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StructuredBuffer<PbrVertex> Vertices : t0;
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StructuredBuffer<int3> FaceIndices : t1;
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RWTexture3D<float4> OutputVolume : u0;
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PsInput vsMain(uint id: SV_VertexID)
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{
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PsInput output;
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int faceIndex = id / 3;// (id % verticesPerInstance) / 3;
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int faceVertexIndex = id % 3;
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PbrVertex vertex = Vertices[FaceIndices[faceIndex][faceVertexIndex]];
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float4 posInObject = float4(vertex.Position, 1);
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output.posInClipSpace = mul(posInObject, ObjectToClipSpace);
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output.posInWorld = vertex.Position;
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float3 triNormal = normalize(vertex.Normal);
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float xAmount = abs(dot(triNormal, float3(1,0,0)));
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float yAmount = abs(dot(triNormal, float3(0,1,0)));
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float zAmount = abs(dot(triNormal, float3(0,0,1)));
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float3 zAxis = float3(0,0,1);
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float3 yAxis = float3(0,1,0);
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float3 xAxis = float3(1,0,0);
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float3 eye = float3(0, 0, -1);
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if (xAmount > yAmount && xAmount > zAmount)
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{
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zAxis = float3(1,0,0);
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yAxis = float3(0,1,0);
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xAxis = -float3(0,0,-1);
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eye = float3(-1,0,0);
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}
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else if (yAmount > xAmount && yAmount > zAmount)
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{
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zAxis = float3(0,1,0);
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yAxis = float3(1,0,0);
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xAxis = float3(0,0,1);
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eye = float3(-1,0,0);
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}
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float3x3 rotWorldToCam = transpose(float3x3(xAxis, yAxis, zAxis));
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float3 eyeInCam = -mul(rotWorldToCam, eye);
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float4x4 worldToCamera = float4x4(float4(rotWorldToCam[0], 0),
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float4(rotWorldToCam[1], 0),
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float4(rotWorldToCam[2], 0),
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float4(eyeInCam, 1));
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// setup orthographic projection with origin at left/bottom and width/height of target volume
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float left = -1, right = 1, bottom = -1, top = 1, zfarPlane = 10, znearPlane = -10;
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float4x4 camToProj = float4x4(2/(right - left), 0, 0, 0,
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0, 2/(top - bottom), 0, 0,
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0, 0, 1/(zfarPlane-znearPlane), 0,
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(left+right)/(left-right), (top+bottom)/(bottom-top), znearPlane/(znearPlane-zfarPlane), 1);
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float4x4 objectToProj = mul(worldToCamera, camToProj);
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output.posInClipSpace = mul(posInObject, objectToProj);
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return output;
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}
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float4 psMain(PsInput pin) : SV_TARGET
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{
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float3 pos= pin.posInClipSpace.xyz* float3(256, 256, 256) + float3(128, 128, 128);
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pos = pin.posInWorld * float3(100, 100, 100) + float3(128, 128, 128);
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OutputVolume[uint3(pos.x, pos.y, pos.z)] = float4(1, 1, 1, 1);
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return float4(1,1,0,1);
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}
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