mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-11-23 20:20:09 +00:00
GregoryBasis optimization. Replace arithmetic operators which uses a temporary
object.
This commit is contained in:
Takahito Tejima
parent
0e91dcd177
commit
5e96a9ba31
@ -122,8 +122,9 @@ EndCapBSplineBasisPatchFactory::GetPatchPoints(
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for (int j = 0; j < 4; ++j) {
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H[i*4+j].Clear(stencilCapacity);
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for (int k = 0; k < 4; ++k) {
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if (isWeightNonZero(Q[i][k]))
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H[i*4+j] += (*bezierCP[j+k*4]) * Q[i][k];
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if (isWeightNonZero(Q[i][k])) {
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H[i*4+j].AddWithWeight(*bezierCP[j+k*4], Q[i][k]);
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}
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}
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}
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}
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@ -131,12 +132,14 @@ EndCapBSplineBasisPatchFactory::GetPatchPoints(
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for (int j = 0; j < 4; ++j) {
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GregoryBasis::Point p(stencilCapacity);
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for (int k = 0; k < 4; ++k) {
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if (isWeightNonZero(Q[j][k])) p += H[i*4+k] * Q[j][k];
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if (isWeightNonZero(Q[j][k])) {
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p.AddWithWeight(H[i*4+k], Q[j][k]);
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}
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}
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_vertexStencils.push_back(p);
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}
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}
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int varyingIndices[] = { 0, 0, 1, 1,
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0, 0, 1, 1,
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3, 3, 2, 2,
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@ -113,41 +113,36 @@ GregoryBasis::ProtoBasis::ProtoBasis(
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valences[4],
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zerothNeighbors[4];
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Point e0[4], e1[4], org[4];
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// XXX: a temporary hack for the performance issue
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// ensure Point has a capacity for the neighborhood of
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// 2 extraordinary verts + 2 regular verts
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// worse case: n-valence verts at a corner of n-gon.
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int stencilCapacity =
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4/*0-ring*/ + 2*(2*(maxvalence-2)/*1-ring around extraordinaries*/
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+ 2/*1-ring around regulars, excluding shared ones*/);
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+ 2/*1-ring around regulars, excluding shared ones*/);
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Point e0[4], e1[4];
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for (int i = 0; i < 4; ++i) {
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P[i].Clear(stencilCapacity);
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e0[i].Clear(stencilCapacity);
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e1[i].Clear(stencilCapacity);
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V[i].Clear(1);
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}
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Vtr::internal::StackBuffer<Index,40> manifoldRings[4];
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Vtr::internal::StackBuffer<Index, 40> manifoldRings[4];
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manifoldRings[0].SetSize(maxvalence*2);
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manifoldRings[1].SetSize(maxvalence*2);
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manifoldRings[2].SetSize(maxvalence*2);
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manifoldRings[3].SetSize(maxvalence*2);
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Vtr::internal::StackBuffer<Point,16> f(maxvalence);
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Vtr::internal::StackBuffer<Point,64> r(maxvalence*4);
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Vtr::internal::StackBuffer<Point, 10> f(maxvalence);
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Vtr::internal::StackBuffer<Point, 40> r(maxvalence*4);
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// the first phase
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for (int vid=0; vid<4; ++vid) {
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org[vid] = Point(facePoints[vid], 1.0f, stencilCapacity);
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Point const &pos = org[vid];
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// save for varying stencils
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V[vid] = Point(facePoints[vid], 1.0f, stencilCapacity);
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V[vid].AddWithWeight(facePoints[vid], 1.0f);
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int ringSize =
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level.gatherQuadRegularRingAroundVertex(
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@ -182,7 +177,7 @@ GregoryBasis::ProtoBasis::ProtoBasis(
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idx_diagonal_m = (manifoldRings[vid][2*im + 1]);
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bool boundaryNeighbor = (level.getVertexEdges(idx_neighbor).size() >
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level.getVertexFaces(idx_neighbor).size());
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level.getVertexFaces(idx_neighbor).size());
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if (fvarChannel>=0) {
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// XXXX manuelk need logic to check for boundary in fvar
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@ -210,11 +205,7 @@ GregoryBasis::ProtoBasis::ProtoBasis(
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f[i].AddWithWeight(idx_neighbor_p, 2.0f/d);
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f[i].AddWithWeight(idx_neighbor, 2.0f/d);
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f[i].AddWithWeight(idx_diagonal, 1.0f/d);
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if (i == 0)
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P[vid] = f[i];
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else
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P[vid] += f[i];
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P[vid].AddWithWeight(f[i], 1.0f/float(ivalence));
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int rid = vid * maxvalence + i;
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r[rid].Clear(4);
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@ -224,8 +215,6 @@ GregoryBasis::ProtoBasis::ProtoBasis(
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r[rid].AddWithWeight(idx_diagonal_m, -1.0f/6.0f);
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}
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P[vid] /= float(ivalence);
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zerothNeighbors[vid] = zerothNeighbor;
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if (currentNeighbor == 1) {
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boundaryEdgeNeighbors[1] = boundaryEdgeNeighbors[0];
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@ -233,24 +222,27 @@ GregoryBasis::ProtoBasis::ProtoBasis(
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for (int i=0; i<ivalence; ++i) {
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int im = (i+ivalence-1)%ivalence;
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Point e = (f[i]+f[im])*0.5f;
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e0[vid] += e * csf(ivalence-3, 2*i);
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e1[vid] += e * csf(ivalence-3, 2*i+1);
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float c0 = 0.5f * csf(ivalence-3, 2*i);
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float c1 = 0.5f * csf(ivalence-3, 2*i+1);
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e0[vid].AddWithWeight(f[i ], c0);
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e0[vid].AddWithWeight(f[im], c0);
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e1[vid].AddWithWeight(f[i ], c1);
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e1[vid].AddWithWeight(f[im], c1);
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}
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float ef = computeCoefficient(ivalence);
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e0[vid] *= ef;
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e1[vid] *= ef;
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if (valence<0) {
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Point b0(boundaryEdgeNeighbors[0], 1.0f, stencilCapacity),
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b1(boundaryEdgeNeighbors[1], 1.0f, stencilCapacity);
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// Boundary gregory case:
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if (valence < 0) {
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P[vid].Clear(stencilCapacity);
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if (ivalence>2) {
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P[vid] = (b0 + b1 + pos*4.0f)/6.0f;
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P[vid].AddWithWeight(boundaryEdgeNeighbors[0], 1.0f/6.0f);
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P[vid].AddWithWeight(boundaryEdgeNeighbors[1], 1.0f/6.0f);
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P[vid].AddWithWeight(facePoints[vid], 4.0f/6.0f);
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} else {
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P[vid] = pos;
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P[vid].AddWithWeight(facePoints[vid], 1.0f);
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}
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float k = float(float(ivalence) - 1.0f); //k is the number of faces
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float c = cosf(float(M_PI)/k);
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@ -259,10 +251,17 @@ GregoryBasis::ProtoBasis::ProtoBasis(
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float alpha_0k = -((1.0f+2.0f*c)*sqrtf(1.0f+c))/((3.0f*k+c)*sqrtf(1.0f-c));
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float beta_0 = s/(3.0f*k + c);
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Point diagonal(manifoldRings[vid][2*zerothNeighbor + 1], 1.0f, stencilCapacity);
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int idx_diagonal = manifoldRings[vid][2*zerothNeighbor + 1];
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e0[vid] = (b0 - b1)/6.0f;
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e1[vid] = pos*gamma + diagonal*beta_0 + (b0 + b1)*alpha_0k;
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e0[vid].Clear(stencilCapacity);
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e0[vid].AddWithWeight(boundaryEdgeNeighbors[0], 1.0f/6.0f);
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e0[vid].AddWithWeight(boundaryEdgeNeighbors[1], -1.0f/6.0f);
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e1[vid].Clear(stencilCapacity);
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e1[vid].AddWithWeight(facePoints[vid], gamma);
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e1[vid].AddWithWeight(idx_diagonal, beta_0);
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e1[vid].AddWithWeight(boundaryEdgeNeighbors[0], alpha_0k);
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e1[vid].AddWithWeight(boundaryEdgeNeighbors[1], alpha_0k);
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for (int x=1; x<ivalence-1; ++x) {
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@ -274,12 +273,10 @@ GregoryBasis::ProtoBasis::ProtoBasis(
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Index idx_neighbor = manifoldRings[vid][2*curri + 0],
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idx_diagonal = manifoldRings[vid][2*curri + 1];
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Point p_neighbor(idx_neighbor, 1.0f, stencilCapacity),
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p_diagonal(idx_diagonal, 1.0f, stencilCapacity);
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e1[vid] += p_neighbor*alpha + p_diagonal*beta;
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e1[vid].AddWithWeight(idx_neighbor, alpha);
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e1[vid].AddWithWeight(idx_diagonal, beta);
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}
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e1[vid] /= 3.0f;
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e1[vid] *= 1.0f/3.0f;
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}
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}
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@ -316,20 +313,25 @@ GregoryBasis::ProtoBasis::ProtoBasis(
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}
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assert(start != -1 && prev != -1 && start_m != -1 && prev_p != -1);
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Point Em_ip(stencilCapacity), Ep_im(stencilCapacity);
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Point Em_ip = P[ip];
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Point Ep_im = P[im];
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if (valences[ip]<-2) {
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Index j = (np + prev_p - zerothNeighbors[ip]) % np;
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Em_ip = P[ip] + e0[ip]*cosf((float(M_PI)*j)/float(np-1)) + e1[ip]*sinf((float(M_PI)*j)/float(np-1));
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Em_ip.AddWithWeight(e0[ip], cosf((float(M_PI)*j)/float(np-1)));
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Em_ip.AddWithWeight(e1[ip], sinf((float(M_PI)*j)/float(np-1)));
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} else {
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Em_ip = P[ip] + e0[ip]*csf(np-3,2*prev_p) + e1[ip]*csf(np-3,2*prev_p+1);
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Em_ip.AddWithWeight(e0[ip], csf(np-3, 2*prev_p));
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Em_ip.AddWithWeight(e1[ip], csf(np-3, 2*prev_p+1));
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}
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if (valences[im]<-2) {
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Index j = (nm + start_m - zerothNeighbors[im]) % nm;
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Ep_im = P[im] + e0[im]*cosf((float(M_PI)*j)/float(nm-1)) + e1[im]*sinf((float(M_PI)*j)/float(nm-1));
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Ep_im.AddWithWeight(e0[im], cosf((float(M_PI)*j)/float(nm-1)));
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Ep_im.AddWithWeight(e1[im], sinf((float(M_PI)*j)/float(nm-1)));
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} else {
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Ep_im = P[im] + e0[im]*csf(nm-3,2*start_m) + e1[im]*csf(nm-3,2*start_m+1);
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Ep_im.AddWithWeight(e0[im], csf(nm-3, 2*start_m));
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Ep_im.AddWithWeight(e1[im], csf(nm-3, 2*start_m+1));
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}
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if (valences[vid] < 0) {
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@ -349,11 +351,25 @@ GregoryBasis::ProtoBasis::ProtoBasis(
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float s1 = 3.0f - 2.0f*csf(n-3,2)-csf(np-3,2),
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s2 = 2.0f*csf(n-3,2),
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s3 = 3.0f -2.0f*cosf(2.0f*float(M_PI)/float(n)) - cosf(2.0f*float(M_PI)/float(nm));
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Ep[vid] = P[vid];
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Ep[vid].AddWithWeight(e0[vid], csf(n-3, 2*start));
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Ep[vid].AddWithWeight(e1[vid], csf(n-3, 2*start +1));
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Ep[vid] = P[vid] + e0[vid]*csf(n-3, 2*start) + e1[vid]*csf(n-3, 2*start +1);
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Em[vid] = P[vid] + e0[vid]*csf(n-3, 2*prev ) + e1[vid]*csf(n-3, 2*prev + 1);
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Fp[vid] = (P[vid]*csf(np-3,2) + Ep[vid]*s1 + Em_ip*s2 + rp[start])/3.0f;
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Fm[vid] = (P[vid]*csf(nm-3,2) + Em[vid]*s3 + Ep_im*s2 - rp[prev])/3.0f;
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Em[vid] = P[vid];
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Em[vid].AddWithWeight(e0[vid], csf(n-3, 2*prev ));
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Em[vid].AddWithWeight(e1[vid], csf(n-3, 2*prev + 1));
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Fp[vid].Clear(stencilCapacity);
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Fp[vid].AddWithWeight(P[vid], csf(np-3, 2)/3.0f);
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Fp[vid].AddWithWeight(Ep[vid], s1/3.0f);
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Fp[vid].AddWithWeight(Em_ip, s2/3.0f);
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Fp[vid].AddWithWeight(rp[start], 1.0f/3.0f);
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Fm[vid].Clear(stencilCapacity);
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Fm[vid].AddWithWeight(P[vid], csf(nm-3, 2)/3.0f);
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Fm[vid].AddWithWeight(Em[vid], s3/3.0f);
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Fm[vid].AddWithWeight(Ep_im, s2/3.0f);
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Fm[vid].AddWithWeight(rp[prev], -1.0f/3.0f);
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} else if (valences[vid] < -2) {
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Index jp = (ivalence + start - zerothNeighbors[vid]) % ivalence,
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@ -363,24 +379,59 @@ GregoryBasis::ProtoBasis::ProtoBasis(
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s2 = 2*csf(n-3,2),
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s3 = 3.0f-2.0f*cosf(2.0f*float(M_PI)/n)-cosf(2.0f*float(M_PI)/nm);
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Ep[vid] = P[vid] + e0[vid]*cosf((float(M_PI)*jp)/float(ivalence-1)) + e1[vid]*sinf((float(M_PI)*jp)/float(ivalence-1));
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Em[vid] = P[vid] + e0[vid]*cosf((float(M_PI)*jm)/float(ivalence-1)) + e1[vid]*sinf((float(M_PI)*jm)/float(ivalence-1));
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Fp[vid] = (P[vid]*csf(np-3,2) + Ep[vid]*s1 + Em_ip*s2 + rp[start])/3.0f;
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Fm[vid] = (P[vid]*csf(nm-3,2) + Em[vid]*s3 + Ep_im*s2 - rp[prev])/3.0f;
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Ep[vid] = P[vid];
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Ep[vid].AddWithWeight(e0[vid], cosf((float(M_PI)*jp)/float(ivalence-1)));
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Ep[vid].AddWithWeight(e1[vid], sinf((float(M_PI)*jp)/float(ivalence-1)));
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Em[vid] = P[vid];
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Em[vid].AddWithWeight(e0[vid], cosf((float(M_PI)*jm)/float(ivalence-1)));
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Em[vid].AddWithWeight(e1[vid], sinf((float(M_PI)*jm)/float(ivalence-1)));
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Fp[vid].Clear(stencilCapacity);
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Fp[vid].AddWithWeight(P[vid], csf(np-3,2)/3.0f);
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Fp[vid].AddWithWeight(Ep[vid], s1/3.0f);
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Fp[vid].AddWithWeight(Em_ip, s2/3.0f);
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Fp[vid].AddWithWeight(rp[start], 1.0f/3.0f);
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Fm[vid].Clear(stencilCapacity);
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Fm[vid].AddWithWeight(P[vid], csf(nm-3,2)/3.0f);
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Fm[vid].AddWithWeight(Em[vid], s3/3.0f);
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Fm[vid].AddWithWeight(Ep_im, s2/3.0f);
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Fm[vid].AddWithWeight(rp[prev], -1.0f/3.0f);
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if (valences[im]<0) {
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s1=3-2*csf(n-3,2)-csf(np-3,2);
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Fp[vid] = Fm[vid] = (P[vid]*csf(np-3,2) + Ep[vid]*s1 + Em_ip*s2 + rp[start])/3.0f;
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Fp[vid].Clear(stencilCapacity);
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Fp[vid].AddWithWeight(P[vid], csf(np-3,2)/3.0f);
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Fp[vid].AddWithWeight(Ep[vid], s1/3.0f);
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Fp[vid].AddWithWeight(Em_ip, s2/3.0f);
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Fp[vid].AddWithWeight(rp[start], 1.0f/3.0f);
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Fm[vid] = Fp[vid];
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} else if (valences[ip]<0) {
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s1 = 3.0f-2.0f*cosf(2.0f*float(M_PI)/n)-cosf(2.0f*float(M_PI)/nm);
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Fm[vid] = Fp[vid] = (P[vid]*csf(nm-3,2) + Em[vid]*s1 + Ep_im*s2 - rp[prev])/3.0f;
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Fm[vid].Clear(stencilCapacity);
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Fm[vid].AddWithWeight(P[vid], csf(nm-3,2)/3.0f);
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Fm[vid].AddWithWeight(Em[vid], s1/3.0f);
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Fm[vid].AddWithWeight(Ep_im, s2/3.0f);
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Fm[vid].AddWithWeight(rp[prev], -1.0f/3.0f);
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Fp[vid] = Fm[vid];
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}
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} else if (valences[vid]==-2) {
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Ep[vid].Clear(stencilCapacity);
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Ep[vid].AddWithWeight(facePoints[vid], 2.0f/3.0f);
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Ep[vid].AddWithWeight(facePoints[ip], 1.0f/3.0f);
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Ep[vid] = (org[vid]*2.0f + org[ip])/3.0f;
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Em[vid] = (org[vid]*2.0f + org[im])/3.0f;
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Fp[vid] = Fm[vid] = (org[vid]*4.0f + org[((vid+2)%n)] + org[ip]*2.0f + org[im]*2.0f)/9.0f;
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Em[vid].Clear(stencilCapacity);
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Em[vid].AddWithWeight(facePoints[vid], 2.0f/3.0f);
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Em[vid].AddWithWeight(facePoints[im], 1.0f/3.0f);
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Fp[vid].Clear(stencilCapacity);
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Fp[vid].AddWithWeight(facePoints[vid], 4.0f/9.0f);
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Fp[vid].AddWithWeight(facePoints[((vid+2)%n)], 1.0f/9.0f);
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Fp[vid].AddWithWeight(facePoints[ip], 2.0f/9.0f);
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Fp[vid].AddWithWeight(facePoints[im], 2.0f/9.0f);
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Fm[vid] = Fp[vid];
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}
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}
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@ -80,19 +80,13 @@ public:
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//
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class Point {
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public:
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static const int RESERVED_STENCIL_SIZE = 64;
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// 40 means up to valence=10 is on stack
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static const int RESERVED_STENCIL_SIZE = 40;
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Point(int stencilCapacity=RESERVED_STENCIL_SIZE) : _size(0) {
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_stencils.SetSize(stencilCapacity);
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}
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Point(Vtr::Index idx, float weight, int stencilCapacity) {
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_stencils.SetSize(stencilCapacity);
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_size = 1;
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_stencils[0].index = idx;
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_stencils[0].weight = weight;
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}
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Point(Point const & other) {
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_stencils.SetSize(other._stencils.GetSize());
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*this = other;
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@ -114,8 +108,23 @@ public:
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}
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void AddWithWeight(Vtr::Index idx, float weight) {
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int loc = findIndex(idx);
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_stencils[loc].weight += weight;
|
||||
for (int i = 0; i < _size; ++i) {
|
||||
if (_stencils[i].index == idx) {
|
||||
_stencils[i].weight += weight;
|
||||
return;
|
||||
}
|
||||
}
|
||||
assert(_size < (int)_stencils.GetSize());
|
||||
_stencils[_size].index = idx;
|
||||
_stencils[_size].weight = weight;
|
||||
++_size;
|
||||
}
|
||||
|
||||
void AddWithWeight(Point const &src, float weight) {
|
||||
for (int i = 0; i < src._size; ++i) {
|
||||
AddWithWeight(src._stencils[i].index,
|
||||
src._stencils[i].weight * weight);
|
||||
}
|
||||
}
|
||||
|
||||
Point & operator = (Point const & other) {
|
||||
@ -128,22 +137,6 @@ public:
|
||||
return *this;
|
||||
}
|
||||
|
||||
Point & operator += (Point const & other) {
|
||||
for (int i = 0; i < other._size; ++i) {
|
||||
AddWithWeight(other._stencils[i].index,
|
||||
other._stencils[i].weight);
|
||||
}
|
||||
return *this;
|
||||
}
|
||||
|
||||
Point & operator -= (Point const & other) {
|
||||
for (int i = 0; i < other._size; ++i) {
|
||||
AddWithWeight(other._stencils[i].index,
|
||||
-other._stencils[i].weight);
|
||||
}
|
||||
return *this;
|
||||
}
|
||||
|
||||
Point & operator *= (float f) {
|
||||
for (int i=0; i<_size; ++i) {
|
||||
_stencils[i].weight *= f;
|
||||
@ -151,26 +144,6 @@ public:
|
||||
return *this;
|
||||
}
|
||||
|
||||
Point & operator /= (float f) {
|
||||
return (*this)*=(1.0f/f);
|
||||
}
|
||||
|
||||
friend Point operator * (Point const & src, float f) {
|
||||
Point p( src ); return p*=f;
|
||||
}
|
||||
|
||||
friend Point operator / (Point const & src, float f) {
|
||||
Point p( src ); return p*= (1.0f/f);
|
||||
}
|
||||
|
||||
Point operator + (Point const & other) {
|
||||
Point p(*this); return p+=other;
|
||||
}
|
||||
|
||||
Point operator - (Point const & other) {
|
||||
Point p(*this); return p-=other;
|
||||
}
|
||||
|
||||
void OffsetIndices(Vtr::Index offset) {
|
||||
for (int i=0; i<_size; ++i) {
|
||||
_stencils[i].index += offset;
|
||||
@ -190,19 +163,6 @@ public:
|
||||
|
||||
private:
|
||||
|
||||
int findIndex(Vtr::Index idx) {
|
||||
for (int i = 0; i < _size; ++i) {
|
||||
if (_stencils[i].index == idx) {
|
||||
return i;
|
||||
}
|
||||
}
|
||||
assert(_size < (int)_stencils.GetSize());
|
||||
_stencils[_size].index = idx;
|
||||
_stencils[_size].weight = 0.0f;
|
||||
++_size;
|
||||
return _size-1;
|
||||
}
|
||||
|
||||
int _size;
|
||||
|
||||
struct Stencil {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user