93 lines
No EOL
2.6 KiB
Text
93 lines
No EOL
2.6 KiB
Text
#include "common.h"
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#include "DX11\tess.h"
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//if you use ccw then corresponding coefs are w, v, u
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//if you use cw then corresponding coefs are u, v, w
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[domain("tri")]
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v2p_bumped main( HS_CONSTANT_DATA_OUTPUT input,
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float3 uvw : SV_DomainLocation,
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const OutputPatch<p_bumped, 3> bp )
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{
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v2p_bumped output;
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//interpolate in screen space
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//uvw = uvw*input.www/dot(uvw,input.www);
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float minc = min( uvw.x, min( uvw.y, uvw.z ) );
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// if the vertex is not on an edge of the original triangle
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[flatten]if (minc!=0.0f)
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{
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// if we are at not the centre of the triangle
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[flatten]if( ((1.0f/3.0f)-minc)> 0.01f )
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{
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// solving for making the smallest uvw component 0.0f as this means the bigger ones sum to 1.0f and
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// are on the edge of the triangle
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// if vertex gets too close to the edge move it on to the edge to replace to old edge vertex
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// otherwise keep fK at 1.0f to restore the old uvw position
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float fK = (1.0f/3.0f)/((1.0f/3.0f)-minc);
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fK = minc < 0.1 ? fK : 1.0f;
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// update uvw
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uvw = lerp((1.0f/3.0f).xxx, uvw, fK);
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}
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}
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float u = uvw.x;
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float v = uvw.y;
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float w = uvw.z;
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output.tcdh = bp[0].tcdh*w + bp[1].tcdh*v + bp[2].tcdh*u;
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output.position = bp[0].position*w + bp[1].position*v + bp[2].position*u;
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float3 M1 = bp[0].M1*w + bp[1].M1*v + bp[2].M1*u; output.M1 = M1;
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float3 M2 = bp[0].M2*w + bp[1].M2*v + bp[2].M2*u; output.M2 = M2;
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float3 M3 = bp[0].M3*w + bp[1].M3*v + bp[2].M3*u; output.M3 = M3;
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float3 Normal = normalize(float3(M1.z, M2.z, M3.z));
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float3 triPos = output.position.xyz;
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#ifdef USE_TDETAIL
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output.tcdbump = bp[0].tcdbump*w + bp[1].tcdbump*v + bp[2].tcdbump*u;
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#endif
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#ifdef USE_LM_HEMI
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output.lmh = bp[0].lmh*w + bp[1].lmh*v + bp[2].lmh*u;
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#endif
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#if TESS_PN
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float3 N[3] =
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{
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float3(bp[0].M1.z, bp[0].M2.z, bp[0].M3.z),
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float3(bp[1].M1.z, bp[1].M2.z, bp[1].M3.z),
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float3(bp[2].M1.z, bp[2].M2.z, bp[2].M3.z)
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};
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float3 P[3] =
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{
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bp[0].position.xyz,
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bp[1].position.xyz,
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bp[2].position.xyz
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};
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ComputePatchVertex(P, N, uvw, input.patch, output.position.xyz, Normal);
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#endif
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#if TESS_HM
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# ifdef USE_TDETAIL
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ComputeDisplacedVertex(output.position.xyz, Normal, output.tcdh, output.tcdbump);
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# else
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ComputeDisplacedVertex(output.position.xyz, Normal, output.tcdh, 0);
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# endif
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#endif
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[flatten]if( minc==0 )
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output.position.xyz = triPos;
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//output.M1.z = Normal.x;
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//output.M2.z = Normal.y;
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//output.M3.z = Normal.z;
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output.hpos = mul(m_P, float4(output.position.xyz,1));
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return output;
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} |