e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
133 lines
3.1 KiB
C++
133 lines
3.1 KiB
C++
/* SPDX-FileCopyrightText: 2011-2022 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup freestyle
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* \brief Class to define a cell grid surrounding the projected image of a scene
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*/
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#include <algorithm>
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#include "OccluderSource.h"
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#include "BLI_sys_types.h"
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#include "BKE_global.h"
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namespace Freestyle {
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OccluderSource::OccluderSource(const GridHelpers::Transform &t, WingedEdge &we)
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: wingedEdge(we), valid(false), transform(t)
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{
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begin();
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}
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OccluderSource::~OccluderSource() = default;
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void OccluderSource::buildCachedPolygon()
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{
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vector<Vec3r> vertices(GridHelpers::enumerateVertices((*currentFace)->getEdgeList()));
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// This doesn't work, because our functor's polymorphism won't survive the copy:
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// std::transform(vertices.begin(), vertices.end(), vertices.begin(), transform);
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// so we have to do:
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for (vector<Vec3r>::iterator i = vertices.begin(); i != vertices.end(); ++i) {
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(*i) = transform(*i);
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}
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cachedPolygon = Polygon3r(vertices, transform((*currentFace)->GetNormal()));
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}
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void OccluderSource::begin()
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{
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vector<WShape *> &wshapes = wingedEdge.getWShapes();
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currentShape = wshapes.begin();
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shapesEnd = wshapes.end();
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valid = false;
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if (currentShape != shapesEnd) {
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vector<WFace *> &wFaces = (*currentShape)->GetFaceList();
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currentFace = wFaces.begin();
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facesEnd = wFaces.end();
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if (currentFace != facesEnd) {
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buildCachedPolygon();
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valid = true;
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}
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}
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}
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bool OccluderSource::next()
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{
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if (valid) {
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++currentFace;
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while (currentFace == facesEnd) {
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++currentShape;
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if (currentShape == shapesEnd) {
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valid = false;
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return false;
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}
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vector<WFace *> &wFaces = (*currentShape)->GetFaceList();
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currentFace = wFaces.begin();
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facesEnd = wFaces.end();
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}
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buildCachedPolygon();
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return true;
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}
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return false;
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}
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bool OccluderSource::isValid()
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{
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// Or:
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// return currentShapes != shapesEnd && currentFace != facesEnd;
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return valid;
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}
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WFace *OccluderSource::getWFace()
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{
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return valid ? *currentFace : nullptr;
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}
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Polygon3r OccluderSource::getCameraSpacePolygon()
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{
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return Polygon3r(GridHelpers::enumerateVertices((*currentFace)->getEdgeList()),
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(*currentFace)->GetNormal());
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}
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Polygon3r &OccluderSource::getGridSpacePolygon()
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{
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return cachedPolygon;
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}
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void OccluderSource::getOccluderProscenium(real proscenium[4])
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{
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begin();
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const Vec3r &initialPoint = cachedPolygon.getVertices()[0];
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proscenium[0] = proscenium[1] = initialPoint[0];
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proscenium[2] = proscenium[3] = initialPoint[1];
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while (isValid()) {
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GridHelpers::expandProscenium(proscenium, cachedPolygon);
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next();
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}
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if (G.debug & G_DEBUG_FREESTYLE) {
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cout << "Proscenium: (" << proscenium[0] << ", " << proscenium[1] << ", " << proscenium[2]
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<< ", " << proscenium[3] << ")" << endl;
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}
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}
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real OccluderSource::averageOccluderArea()
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{
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real area = 0.0;
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uint numFaces = 0;
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for (begin(); isValid(); next()) {
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Vec3r min, max;
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cachedPolygon.getBBox(min, max);
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area += (max[0] - min[0]) * (max[1] - min[1]);
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++numFaces;
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}
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area /= numFaces;
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return area;
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}
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} /* namespace Freestyle */
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