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Diffstat (limited to 'source/blender/freestyle/intern/view_map/SilhouetteGeomEngine.cpp')
| -rwxr-xr-x | source/blender/freestyle/intern/view_map/SilhouetteGeomEngine.cpp | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/source/blender/freestyle/intern/view_map/SilhouetteGeomEngine.cpp b/source/blender/freestyle/intern/view_map/SilhouetteGeomEngine.cpp new file mode 100755 index 00000000000..c0817189bc2 --- /dev/null +++ b/source/blender/freestyle/intern/view_map/SilhouetteGeomEngine.cpp @@ -0,0 +1,266 @@ + +// +// Copyright (C) : Please refer to the COPYRIGHT file distributed +// with this source distribution. +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; either version 2 +// of the License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +// +/////////////////////////////////////////////////////////////////////////////// + +#include "Silhouette.h" +#include "SilhouetteGeomEngine.h" +#include "../geometry/GeomUtils.h" + +using namespace std; + +Vec3r SilhouetteGeomEngine::_Viewpoint = Vec3r(0,0,0); +real SilhouetteGeomEngine::_translation[3] = {0,0,0}; +real SilhouetteGeomEngine::_modelViewMatrix[4][4] = {{1,0,0,0}, + {0,1,0,0}, + {0,0,1,0}, + {0,0,0,1}}; +real SilhouetteGeomEngine::_projectionMatrix[4][4] = {{1,0,0,0}, + {0,1,0,0}, + {0,0,1,0}, + {0,0,0,1}}; +real SilhouetteGeomEngine::_transform[4][4] = {{1,0,0,0}, + {0,1,0,0}, + {0,0,1,0}, + {0,0,0,1}}; +int SilhouetteGeomEngine::_viewport[4] = {1,1,1,1}; // the viewport +real SilhouetteGeomEngine::_Focal = 0.0; + +real SilhouetteGeomEngine::_glProjectionMatrix[4][4] = {{1,0,0,0}, + {0,1,0,0}, + {0,0,1,0}, + {0,0,0,1}}; +real SilhouetteGeomEngine::_glModelViewMatrix[4][4] = {{1,0,0,0}, + {0,1,0,0}, + {0,0,1,0}, + {0,0,0,1}}; +real SilhouetteGeomEngine::_znear = 0.0; +real SilhouetteGeomEngine::_zfar = 100.0; +bool SilhouetteGeomEngine::_isOrthographicProjection = false; + +SilhouetteGeomEngine * SilhouetteGeomEngine::_pInstance = 0; + +void SilhouetteGeomEngine::setTransform(const real iModelViewMatrix[4][4], const real iProjectionMatrix[4][4], const int iViewport[4], real iFocal) +{ + unsigned int i,j; + _translation[0] = iModelViewMatrix[3][0]; + _translation[1] = iModelViewMatrix[3][1]; + _translation[2] = iModelViewMatrix[3][2]; + + for(i=0; i<4; i++){ + for(j=0; j<4; j++) + { + _modelViewMatrix[i][j] = iModelViewMatrix[j][i]; + _glModelViewMatrix[i][j] = iModelViewMatrix[i][j]; + } + } + + for(i=0; i<4; i++){ + for(j=0; j<4; j++) + { + _projectionMatrix[i][j] = iProjectionMatrix[j][i]; + _glProjectionMatrix[i][j] = iProjectionMatrix[i][j]; + } + } + + for(i=0; i<4; i++){ + for(j=0; j<4; j++) + { + _transform[i][j] = 0; + for(unsigned int k=0; k<4; k++) + _transform[i][j] += _projectionMatrix[i][k] * _modelViewMatrix[k][j]; + } + } + + for(i=0; i<4; i++){ + _viewport[i] = iViewport[i]; + } + _Focal = iFocal; + + _isOrthographicProjection = (iProjectionMatrix[3][3] != 0.0); +} + +void SilhouetteGeomEngine::setFrustum(real iZNear, real iZFar) +{ + _znear = iZNear; + _zfar = iZFar; +} + +void SilhouetteGeomEngine::retrieveViewport(int viewport[4]){ + memcpy(viewport, _viewport, 4*sizeof(int)); +} +//#define HUGE 1e9 + +void SilhouetteGeomEngine::ProjectSilhouette(vector<SVertex*>& ioVertices) +{ + Vec3r newPoint; + // real min=HUGE; + // real max=-HUGE; + vector<SVertex*>::iterator sv, svend; + + for(sv=ioVertices.begin(), svend=ioVertices.end(); + sv!=svend; + sv++) + { + GeomUtils::fromWorldToImage((*sv)->point3D(), newPoint, _modelViewMatrix, _projectionMatrix, _viewport); + newPoint[2] = (-newPoint[2]-_znear)/(_zfar-_znear); // normalize Z between 0 and 1 + (*sv)->setPoint2D(newPoint); + //cerr << (*sv)->point2d().z() << " "; + // real d=(*sv)->point2d()[2]; + // if (d>max) max =d; + // if (d<min) min =d; + } + // for(sv=ioVertices.begin(), svend=ioVertices.end(); + // sv!=svend; + // sv++) + // { + // Vec3r P((*sv)->point2d()); + // (*sv)->setPoint2D(Vec3r(P[0], P[1], 1.0-(P[2]-min)/(max-min))); + // //cerr<<(*sv)->point2d()[2]<<" "; + // } +} + +void SilhouetteGeomEngine::ProjectSilhouette(SVertex* ioVertex) +{ + Vec3r newPoint; + // real min=HUGE; + // real max=-HUGE; + vector<SVertex*>::iterator sv, svend; + GeomUtils::fromWorldToImage(ioVertex->point3D(), newPoint, _modelViewMatrix, _projectionMatrix, _viewport); + newPoint[2] = (-newPoint[2]-_znear)/(_zfar-_znear); // normalize Z between 0 and 1 + ioVertex->setPoint2D(newPoint); +} + +real SilhouetteGeomEngine::ImageToWorldParameter(FEdge *fe, real t) +{ + if( _isOrthographicProjection ) + return t; + + // we need to compute for each parameter t the corresponding + // parameter T which gives the intersection in 3D. + real T; + + // suffix w for world, c for camera, r for retina, i for image + Vec3r Aw = (fe)->vertexA()->point3D(); + Vec3r Bw = (fe)->vertexB()->point3D(); + Vec3r Ac, Bc; + GeomUtils::fromWorldToCamera(Aw, Ac, _modelViewMatrix); + GeomUtils::fromWorldToCamera(Bw, Bc, _modelViewMatrix); + Vec3r ABc = Bc - Ac; +#if 0 + cout << "Ac " << Ac << endl; + cout << "Bc " << Bc << endl; + cout << "ABc " << ABc << endl; +#endif + Vec3r Ai = (fe)->vertexA()->point2D(); + Vec3r Bi = (fe)->vertexB()->point2D(); + Vec3r Ii = Ai + t * (Bi - Ai); // the intersection point in the 2D image space + Vec3r Ir, Ic; + GeomUtils::fromImageToRetina(Ii, Ir, _viewport); + + real alpha, beta, denom; + real m11 = _projectionMatrix[0][0]; + real m13 = _projectionMatrix[0][2]; + real m22 = _projectionMatrix[1][1]; + real m23 = _projectionMatrix[1][2]; + + if (fabs(ABc[0]) > 1e-6) { + + alpha = ABc[2] / ABc[0]; + beta = Ac[2] - alpha * Ac[0]; + denom = alpha * (Ir[0] + m13) + m11; + if (fabs(denom) < 1e-6) + goto iter; + Ic[0] = -beta * (Ir[0] + m13) / denom; +// Ic[1] = -(Ir[1] + m23) * (alpha * Ic[0] + beta) / m22; +// Ic[2] = alpha * (Ic[0] - Ac[0]) + Ac[2]; + T = (Ic[0] - Ac[0]) / ABc[0]; + + } else if (fabs(ABc[1]) > 1e-6) { + + alpha = ABc[2] / ABc[1]; + beta = Ac[2] - alpha * Ac[1]; + denom = alpha * (Ir[1] + m23) + m22; + if (fabs(denom) < 1e-6) + goto iter; + Ic[1] = -beta * (Ir[1] + m23) / denom; +// Ic[0] = -(Ir[0] + m13) * (alpha * Ic[1] + beta) / m11; +// Ic[2] = alpha * (Ic[1] - Ac[1]) + Ac[2]; + T = (Ic[1] - Ac[1]) / ABc[1]; + + } else { + +iter: bool x_coords, less_than; + if (fabs(Bi[0] - Ai[0]) > 1e-6) { + x_coords = true; + less_than = Ai[0] < Bi[0]; + } else { + x_coords = false; + less_than = Ai[1] < Bi[1]; + } + Vec3r Pc, Pr, Pi; + real T_sta = 0.0; + real T_end = 1.0; + real delta_x, delta_y, dist, dist_threshold = 1e-6; + int i, max_iters = 100; + for (i = 0; i < max_iters; i++) { + T = T_sta + 0.5 * (T_end - T_sta); + Pc = Ac + T * ABc; + GeomUtils::fromCameraToRetina(Pc, Pr, _projectionMatrix); + GeomUtils::fromRetinaToImage(Pr, Pi, _viewport); + delta_x = Ii[0] - Pi[0]; + delta_y = Ii[1] - Pi[1]; + dist = sqrt(delta_x * delta_x + delta_y * delta_y); + if (dist < dist_threshold) + break; + if (x_coords) { + if (less_than) { + if (Pi[0] < Ii[0]) { T_sta = T; } else { T_end = T; } + } else { + if (Pi[0] > Ii[0]) { T_sta = T; } else { T_end = T; } + } + } else { + if (less_than) { + if (Pi[1] < Ii[1]) { T_sta = T; } else { T_end = T; } + } else { + if (Pi[1] > Ii[1]) { T_sta = T; } else { T_end = T; } + } + } + } +#if 0 + printf("SilhouetteGeomEngine::ImageToWorldParameter(): #iters = %d, dist = %e\n", i, dist); +#endif + if (i == max_iters) + printf("SilhouetteGeomEngine::ImageToWorldParameter(): reached to max_iters (dist = %e)\n", dist); + } + + return T; +} + +Vec3r SilhouetteGeomEngine::WorldToImage(const Vec3r& M) + +{ + + Vec3r newPoint; + GeomUtils::fromWorldToImage(M, newPoint, _transform, _viewport); + newPoint[2] = (-newPoint[2]-_znear)/(_zfar-_znear); // normalize Z between 0 and 1 + return newPoint; + +} + |