Campbell Barton
e12c08e8d1
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125 lines
4.4 KiB
C++
125 lines
4.4 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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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 "Pow23GridDensityProvider.h"
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#include "BKE_global.h"
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namespace Freestyle {
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Pow23GridDensityProvider::Pow23GridDensityProvider(OccluderSource &source,
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const real proscenium[4],
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unsigned numFaces)
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: GridDensityProvider(source), numFaces(numFaces)
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{
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initialize(proscenium);
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}
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Pow23GridDensityProvider::Pow23GridDensityProvider(OccluderSource &source,
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const BBox<Vec3r> &bbox,
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const GridHelpers::Transform &transform,
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unsigned numFaces)
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: GridDensityProvider(source), numFaces(numFaces)
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{
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real proscenium[4];
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calculateQuickProscenium(transform, bbox, proscenium);
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initialize(proscenium);
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}
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Pow23GridDensityProvider::Pow23GridDensityProvider(OccluderSource &source, unsigned numFaces)
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: GridDensityProvider(source), numFaces(numFaces)
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{
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real proscenium[4];
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calculateOptimalProscenium(source, proscenium);
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initialize(proscenium);
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}
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Pow23GridDensityProvider::~Pow23GridDensityProvider()
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{
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}
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void Pow23GridDensityProvider::initialize(const real proscenium[4])
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{
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float prosceniumWidth = (proscenium[1] - proscenium[0]);
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float prosceniumHeight = (proscenium[3] - proscenium[2]);
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real cellArea = prosceniumWidth * prosceniumHeight / pow(numFaces, 2.0f / 3.0f);
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if (G.debug & G_DEBUG_FREESTYLE) {
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cout << prosceniumWidth << " x " << prosceniumHeight << " grid with cells of area " << cellArea
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<< "." << endl;
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}
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_cellSize = sqrt(cellArea);
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// Now we know how many cells make each side of our grid
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_cellsX = ceil(prosceniumWidth / _cellSize);
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_cellsY = ceil(prosceniumHeight / _cellSize);
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if (G.debug & G_DEBUG_FREESTYLE) {
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cout << _cellsX << "x" << _cellsY << " cells of size " << _cellSize << " square." << endl;
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}
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// Make sure the grid exceeds the proscenium by a small amount
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float safetyZone = 0.1;
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if (_cellsX * _cellSize < prosceniumWidth * (1.0 + safetyZone)) {
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_cellsX = ceil(prosceniumWidth * (1.0 + safetyZone) / _cellSize);
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}
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if (_cellsY * _cellSize < prosceniumHeight * (1.0 + safetyZone)) {
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_cellsY = ceil(prosceniumHeight * (1.0 + safetyZone) / _cellSize);
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}
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if (G.debug & G_DEBUG_FREESTYLE) {
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cout << _cellsX << "x" << _cellsY << " cells of size " << _cellSize << " square." << endl;
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}
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// Find grid origin
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_cellOrigin[0] = ((proscenium[0] + proscenium[1]) / 2.0) - (_cellsX / 2.0) * _cellSize;
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_cellOrigin[1] = ((proscenium[2] + proscenium[3]) / 2.0) - (_cellsY / 2.0) * _cellSize;
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}
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Pow23GridDensityProviderFactory::Pow23GridDensityProviderFactory(unsigned numFaces)
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: numFaces(numFaces)
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{
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}
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Pow23GridDensityProviderFactory::~Pow23GridDensityProviderFactory()
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{
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}
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AutoPtr<GridDensityProvider> Pow23GridDensityProviderFactory::newGridDensityProvider(
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OccluderSource &source, const real proscenium[4])
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{
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return AutoPtr<GridDensityProvider>(new Pow23GridDensityProvider(source, proscenium, numFaces));
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}
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AutoPtr<GridDensityProvider> Pow23GridDensityProviderFactory::newGridDensityProvider(
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OccluderSource &source, const BBox<Vec3r> &bbox, const GridHelpers::Transform &transform)
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{
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return AutoPtr<GridDensityProvider>(
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new Pow23GridDensityProvider(source, bbox, transform, numFaces));
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}
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AutoPtr<GridDensityProvider> Pow23GridDensityProviderFactory::newGridDensityProvider(
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OccluderSource &source)
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{
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return AutoPtr<GridDensityProvider>(new Pow23GridDensityProvider(source, numFaces));
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}
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} /* namespace Freestyle */
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