117 lines
No EOL
4.1 KiB
C
117 lines
No EOL
4.1 KiB
C
#ifndef TESS_H_INCLUDED
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# define TESS_H_INCLUDED
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// Output patch constant data.
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struct PNPatch
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{
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// Geometry cubic control points (excluding corners)
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float3 f3B210 : POSITION3;
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float3 f3B120 : POSITION4;
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float3 f3B021 : POSITION5;
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float3 f3B012 : POSITION6;
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float3 f3B102 : POSITION7;
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float3 f3B201 : POSITION8;
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float3 f3B111 : CENTER;
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// Normal quadratic control points (excluding corners)
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float3 f3N110 : NORMAL3;
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float3 f3N011 : NORMAL4;
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float3 f3N101 : NORMAL5;
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};
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struct HS_CONSTANT_DATA_OUTPUT
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{
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float Edges[3] : SV_TessFactor;
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float Inside : SV_InsideTessFactor;
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//float3 www : DUBBIES;
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#ifdef TESS_PN
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PNPatch patch;
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#endif
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};
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float triLOD;
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void ComputeTessFactor(out float Edges[3] : SV_TessFactor, out float Inside : SV_InsideTessFactor)
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{
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//float factor = clamp(triLOD, 1, 1);//factor = (Output.N.z>0)?-1:10;//max(factor*10, 1);
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Edges[0] = Edges[1] = Edges[2] = /*63;//*/triLOD;//factor;
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Inside = /*63;//*/triLOD;//factor;
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}
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void ComputePNPatch(float3 P[3], float3 N[3], out PNPatch patch)
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{
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// Compute the cubic geometry control points
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// Edge control points
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patch.f3B210 = (2.0f*P[0].xyz + P[1].xyz - dot(P[1].xyz-P[0].xyz, N[0])*N[0]) / 3.0f;
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patch.f3B120 = (2.0f*P[1].xyz + P[0].xyz - dot(P[0].xyz-P[1].xyz, N[1])*N[1]) / 3.0f;
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patch.f3B021 = (2.0f*P[1].xyz + P[2].xyz - dot(P[2].xyz-P[1].xyz, N[1])*N[1]) / 3.0f;
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patch.f3B012 = (2.0f*P[2].xyz + P[1].xyz - dot(P[1].xyz-P[2].xyz, N[2])*N[2]) / 3.0f;
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patch.f3B102 = (2.0f*P[2].xyz + P[0].xyz - dot(P[0].xyz-P[2].xyz, N[2])*N[2]) / 3.0f;
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patch.f3B201 = (2.0f*P[0].xyz + P[2].xyz - dot(P[2].xyz-P[0].xyz, N[0])*N[0]) / 3.0f;
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// Center control point
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float3 f3E = ( patch.f3B210 + patch.f3B120 + patch.f3B021 + patch.f3B012 + patch.f3B102 + patch.f3B201 ) / 6.0f;
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float3 f3V = ( P[0].xyz + P[1].xyz + P[2].xyz ) / 3.0f;
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patch.f3B111 = f3E + ( ( f3E - f3V ) / 2.0f );
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// Compute the quadratic normal control points, and rotate into world space
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float fV12 = 2.0f * dot( P[1].xyz - P[0].xyz, N[0] + N[1] ) / dot( P[1].xyz - P[0].xyz, P[1].xyz - P[0].xyz );
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patch.f3N110 = normalize( N[0] + N[1] - fV12 * ( P[1].xyz - P[0].xyz ));
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float fV23 = 2.0f * dot( P[2].xyz - P[1].xyz, N[1] + N[2] ) / dot( P[2].xyz - P[1].xyz, P[2].xyz - P[1].xyz );
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patch.f3N011 = normalize( N[1] + N[2] - fV23 * ( P[2].xyz - P[1].xyz ));
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float fV31 = 2.0f * dot( P[0].xyz - P[2].xyz, N[2] + N[0] ) / dot( P[0].xyz - P[2].xyz, P[0].xyz - P[2].xyz );
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patch.f3N101 = normalize( N[2] + N[0] - fV31 * ( P[0].xyz - P[2].xyz ));
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}
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void ComputePatchVertex(float3 P[3], float3 N[3], float3 uvw, in PNPatch patch, out float3 Pos, out float3 Norm)
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{
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float u = uvw.y;
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float v = uvw.x;
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float w = uvw.z;
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Pos = P[0] * w * w * w +
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P[1] * u * u * u +
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P[2] * v * v * v +
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patch.f3B210 * 3.0f * w * w * u +
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patch.f3B120 * 3.0f * w * u * u +
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patch.f3B201 * 3.0f * w * w * v +
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patch.f3B021 * 3.0f * u * u * v +
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patch.f3B102 * 3.0f * w * v * v +
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patch.f3B012 * 3.0f * u * v * v +
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patch.f3B111 * 6.0f * w * u * v;
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// Compute normal from quadratic control points and barycentric coords
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Norm = N[0] * w * w +
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N[1] * u * u +
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N[2] * v * v +
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patch.f3N110 * w * u +
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patch.f3N011 * u * v +
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patch.f3N101 * w * v;
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}
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sampler smp_bump_ds; // Use D3DTADDRESS_WRAP, D3DTEXF_ANISOTROPIC, D3DTEXF_LINEAR, D3DTEXF_ANISOTROPIC
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Texture2D s_tbump; //
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Texture2D s_tbumpX; //
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Texture2D s_tdetailBumpX; // Error for bump detail
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void ComputeDisplacedVertex(inout float3 P, float3 N, float2 tc, float2 tcd)
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{
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#ifdef USE_TDETAIL
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float4 Nu = s_tbump.SampleLevel (smp_bump_ds, tc, 0); // IN: normal.gloss
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float4 NuE = s_tbumpX.SampleLevel(smp_bump_ds, tc, 0); // IN: normal_error.height
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float3 Ne = Nu.wzy + (NuE.xyz - 1.0h); //(Nu.wzyx - .5h) + (E-.5)
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float height = NuE.w;
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# ifdef USE_TDETAIL_BUMP
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float4 NDetailX = s_tdetailBumpX.SampleLevel(smp_bump_ds, tcd, 0);
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height += (NDetailX.w-0.5)*0.2;
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# endif
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P += N*height*0.07;
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#endif
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}
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#endif |