mirror of
https://github.com/PixarAnimationStudios/OpenSubdiv
synced 2024-11-25 13:00:07 +00:00
132 lines
4.1 KiB
C++
132 lines
4.1 KiB
C++
//
|
|
// Copyright 2013 Pixar
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "Apache License")
|
|
// with the following modification; you may not use this file except in
|
|
// compliance with the Apache License and the following modification to it:
|
|
// Section 6. Trademarks. is deleted and replaced with:
|
|
//
|
|
// 6. Trademarks. This License does not grant permission to use the trade
|
|
// names, trademarks, service marks, or product names of the Licensor
|
|
// and its affiliates, except as required to comply with Section 4(c) of
|
|
// the License and to reproduce the content of the NOTICE file.
|
|
//
|
|
// You may obtain a copy of the Apache License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the Apache License with the above modification is
|
|
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
// KIND, either express or implied. See the Apache License for the specific
|
|
// language governing permissions and limitations under the Apache License.
|
|
//
|
|
|
|
#include "../osd/ompSmoothNormalController.h"
|
|
|
|
#ifdef OPENSUBDIV_HAS_OPENMP
|
|
#include <omp.h>
|
|
#endif
|
|
|
|
#include <math.h>
|
|
#include <string.h>
|
|
|
|
namespace OpenSubdiv {
|
|
namespace OPENSUBDIV_VERSION {
|
|
|
|
inline void
|
|
cross(float *n, const float *p0, const float *p1, const float *p2) {
|
|
|
|
float a[3] = { p1[0]-p0[0], p1[1]-p0[1], p1[2]-p0[2] };
|
|
float b[3] = { p2[0]-p0[0], p2[1]-p0[1], p2[2]-p0[2] };
|
|
n[0] = a[1]*b[2]-a[2]*b[1];
|
|
n[1] = a[2]*b[0]-a[0]*b[2];
|
|
n[2] = a[0]*b[1]-a[1]*b[0];
|
|
|
|
float rn = 1.0f/sqrtf(n[0]*n[0] + n[1]*n[1] + n[2]*n[2]);
|
|
n[0] *= rn;
|
|
n[1] *= rn;
|
|
n[2] *= rn;
|
|
}
|
|
|
|
void OsdOmpSmoothNormalController::_smootheNormals(
|
|
OsdCpuSmoothNormalContext * context) {
|
|
|
|
OsdVertexBufferDescriptor const & iDesc = context->GetInputVertexDescriptor(),
|
|
& oDesc = context->GetOutputVertexDescriptor();
|
|
|
|
assert(iDesc.length==3 and oDesc.length==3);
|
|
|
|
float const * iBuffer = context->GetCurrentInputVertexBuffer() + iDesc.offset;
|
|
float * oBuffer = context->GetCurrentOutputVertexBuffer() + oDesc.offset;
|
|
|
|
std::vector<unsigned int> const & verts = context->GetControlVertices();
|
|
|
|
FarPatchTables::PatchArrayVector const & parrays = context->GetPatchArrayVector();
|
|
|
|
if (verts.empty() or parrays.empty() or (not iBuffer) or (not oBuffer)) {
|
|
return;
|
|
}
|
|
|
|
for (int i=0; i<(int)parrays.size(); ++i) {
|
|
|
|
FarPatchTables::PatchArray const & pa = parrays[i];
|
|
|
|
FarPatchTables::Type type = pa.GetDescriptor().GetType();
|
|
|
|
|
|
if (type==FarPatchTables::QUADS or type==FarPatchTables::TRIANGLES) {
|
|
|
|
int nv = FarPatchTables::Descriptor::GetNumControlVertices(type);
|
|
|
|
// if necessary, reset all normal values to 0
|
|
if (context->GetResetMemory()) {
|
|
#pragma omp parallel for
|
|
for (int j=0; j<context->GetNumVertices(); ++j) {
|
|
float * ptr = oBuffer + j * oDesc.stride;
|
|
memset(ptr, 0, oDesc.length*sizeof(float));
|
|
}
|
|
}
|
|
|
|
|
|
#pragma omp parallel for
|
|
for (int j=0; j<(int)pa.GetNumPatches(); ++j) {
|
|
|
|
int idx = pa.GetVertIndex() + j*nv;
|
|
|
|
float const * p0 = iBuffer + verts[idx+0]*iDesc.stride,
|
|
* p1 = iBuffer + verts[idx+1]*iDesc.stride,
|
|
* p2 = iBuffer + verts[idx+2]*iDesc.stride;
|
|
|
|
// compute face normal
|
|
float n[3];
|
|
cross( n, p0, p1, p2 );
|
|
|
|
// add normal to all vertices of the face
|
|
for (int k=0; k<nv; ++k) {
|
|
|
|
float * dst = oBuffer + verts[idx+k]*oDesc.stride;
|
|
|
|
dst[0] += n[0];
|
|
dst[1] += n[1];
|
|
dst[2] += n[2];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
OsdOmpSmoothNormalController::OsdOmpSmoothNormalController() {
|
|
}
|
|
|
|
OsdOmpSmoothNormalController::~OsdOmpSmoothNormalController() {
|
|
}
|
|
|
|
void
|
|
OsdOmpSmoothNormalController::Synchronize() {
|
|
}
|
|
|
|
} // end namespace OPENSUBDIV_VERSION
|
|
} // end namespace OpenSubdiv
|