forked from bartvdbraak/blender
da376e0237
Cycles uses code from some great open source projects, many thanks them: * BVH building and traversal code from NVidia's "Understanding the Efficiency of Ray Traversal on GPUs": http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/ * Open Shading Language for a large part of the shading system: http://code.google.com/p/openshadinglanguage/ * Blender for procedural textures and a few other nodes. * Approximate Catmull Clark subdivision from NVidia Mesh tools: http://code.google.com/p/nvidia-mesh-tools/ * Sobol direction vectors from: http://web.maths.unsw.edu.au/~fkuo/sobol/ * Film response functions from: http://www.cs.columbia.edu/CAVE/software/softlib/dorf.php
104 lines
2.1 KiB
C++
104 lines
2.1 KiB
C++
/*
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* Copyright 2011, Blender Foundation.
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*
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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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#include "subd_stencil.h"
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#include "util_debug.h"
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#include "util_math.h"
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CCL_NAMESPACE_BEGIN
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StencilMask::StencilMask()
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{
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}
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StencilMask::StencilMask(int size)
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{
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/* initialize weights to zero. */
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weights.resize(size, 0.0f);
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}
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void StencilMask::resize(int size)
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{
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weights.resize(size, 0.0f);
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}
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StencilMask& StencilMask::operator=(float value)
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{
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const int size = weights.size();
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for(int i = 0; i < size; i++)
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weights[i] = value;
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return *this;
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}
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void StencilMask::operator+=(const StencilMask& mask)
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{
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assert(mask.size() == size());
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const int size = weights.size();
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for(int i = 0; i < size; i++)
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weights[i] += mask.weights[i];
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}
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void StencilMask::operator-=(const StencilMask& mask)
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{
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assert(mask.size() == size());
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const int size = weights.size();
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for(int i = 0; i < size; i++)
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weights[i] -= mask.weights[i];
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}
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void StencilMask::operator*=(float scale)
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{
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const int size = weights.size();
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for(int i = 0; i < size; i++)
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weights[i] *= scale;
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}
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void StencilMask::operator/=(float scale)
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{
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*this *= 1.0f/scale;
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}
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float StencilMask::sum() const
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{
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float total = 0.0f;
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const int size = weights.size();
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for(int i = 0; i < size; i++)
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total += weights[i];
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return total;
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}
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bool StencilMask::is_normalized() const
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{
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return fabsf(sum() - 1.0f) < 0.0001f;
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}
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void StencilMask::normalize()
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{
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*this /= sum();
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}
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CCL_NAMESPACE_END
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