1 files changed, 123 insertions, 0 deletions
diff --git a/source/blender/freestyle/intern/view_map/Pow23GridDensityProvider.cpp b/source/blender/freestyle/intern/view_map/Pow23GridDensityProvider.cpp
new file mode 100644
index 00000000000..10c6265ebb4
--- /dev/null
+++ b/source/blender/freestyle/intern/view_map/Pow23GridDensityProvider.cpp
@@ -0,0 +1,123 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2010 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/freestyle/intern/view_map/Pow23GridDensityProvider.cpp
+ *  \ingroup freestyle
+ *  \brief Class to define a cell grid surrounding the projected image of a scene
+ *  \author Alexander Beels
+ *  \date 2011-2-8
+ */
+
+#include "Pow23GridDensityProvider.h"
+
+#include "BKE_global.h"
+
+Pow23GridDensityProvider::Pow23GridDensityProvider(OccluderSource& source, const real proscenium[4], unsigned numFaces)
+: GridDensityProvider(source), numFaces(numFaces)
+{
+	initialize (proscenium);
+}
+
+Pow23GridDensityProvider::Pow23GridDensityProvider(OccluderSource& source, const BBox<Vec3r>& bbox,
+                                                   const GridHelpers::Transform& transform, unsigned numFaces)
+: GridDensityProvider(source), numFaces(numFaces)
+{
+	real proscenium[4];
+	calculateQuickProscenium(transform, bbox, proscenium);
+
+	initialize (proscenium);
+}
+
+Pow23GridDensityProvider::Pow23GridDensityProvider(OccluderSource& source, unsigned numFaces)
+: GridDensityProvider(source), numFaces(numFaces)
+{
+	real proscenium[4];
+	calculateOptimalProscenium(source, proscenium);
+
+	initialize (proscenium);
+}
+
+Pow23GridDensityProvider::~Pow23GridDensityProvider () {}
+
+void Pow23GridDensityProvider::initialize(const real proscenium[4])
+{
+	float prosceniumWidth = (proscenium[1] - proscenium[0]);
+	float prosceniumHeight = (proscenium[3] - proscenium[2]);
+	real cellArea = prosceniumWidth * prosceniumHeight / pow(numFaces, 2.0f / 3.0f);
+	if (G.debug & G_DEBUG_FREESTYLE) {
+		cout << prosceniumWidth << " x " << prosceniumHeight << " grid with cells of area " << cellArea << "." << endl;
+	}
+
+	_cellSize = sqrt(cellArea);
+	// Now we know how many cells make each side of our grid
+	_cellsX = ceil(prosceniumWidth / _cellSize);
+	_cellsY = ceil(prosceniumHeight / _cellSize);
+	if (G.debug & G_DEBUG_FREESTYLE) {
+		cout << _cellsX << "x" << _cellsY << " cells of size " << _cellSize << " square." << endl;
+	}
+
+	// Make sure the grid exceeds the proscenium by a small amount
+	float safetyZone = 0.1;
+	if (_cellsX * _cellSize < prosceniumWidth * (1.0 + safetyZone)) {
+		_cellsX = prosceniumWidth * (1.0 + safetyZone) / _cellSize;
+	}
+	if (_cellsY * _cellSize < prosceniumHeight * (1.0 + safetyZone)) {
+		_cellsY = prosceniumHeight * (1.0 + safetyZone) / _cellSize;
+	}
+	if (G.debug & G_DEBUG_FREESTYLE) {
+		cout << _cellsX << "x" << _cellsY << " cells of size " << _cellSize << " square." << endl;
+	}
+
+	// Find grid origin
+	_cellOrigin[0] = ((proscenium[0] + proscenium[1]) / 2.0) - (_cellsX / 2.0) * _cellSize;
+	_cellOrigin[1] = ((proscenium[2] + proscenium[3]) / 2.0) - (_cellsY / 2.0) * _cellSize;
+}
+
+Pow23GridDensityProviderFactory::Pow23GridDensityProviderFactory(unsigned numFaces)
+: numFaces(numFaces)
+{
+}
+
+Pow23GridDensityProviderFactory::~Pow23GridDensityProviderFactory () {}
+
+auto_ptr<GridDensityProvider>
+Pow23GridDensityProviderFactory::newGridDensityProvider(OccluderSource& source, const real proscenium[4])
+{
+	return auto_ptr<GridDensityProvider>(new Pow23GridDensityProvider(source, proscenium, numFaces));
+}
+
+auto_ptr<GridDensityProvider>
+Pow23GridDensityProviderFactory::newGridDensityProvider(OccluderSource& source, const BBox<Vec3r>& bbox,
+                                                        const GridHelpers::Transform& transform)
+{
+	return auto_ptr<GridDensityProvider>(new Pow23GridDensityProvider(source, bbox, transform, numFaces));
+}
+
+auto_ptr<GridDensityProvider> Pow23GridDensityProviderFactory::newGridDensityProvider(OccluderSource& source)
+{
+	return auto_ptr<GridDensityProvider>(new Pow23GridDensityProvider(source, numFaces));
+}