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/*
* Copyright 2011, Blender Foundation.
*
* 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.
*/
#include "subd_stencil.h"
#include "util_debug.h"
#include "util_math.h"
CCL_NAMESPACE_BEGIN
StencilMask::StencilMask()
{
}
StencilMask::StencilMask(int size)
{
/* initialize weights to zero. */
weights.resize(size, 0.0f);
}
void StencilMask::resize(int size)
{
weights.resize(size, 0.0f);
}
StencilMask& StencilMask::operator=(float value)
{
const int size = weights.size();
for(int i = 0; i < size; i++)
weights[i] = value;
return *this;
}
void StencilMask::operator+=(const StencilMask& mask)
{
assert(mask.size() == size());
const int size = weights.size();
for(int i = 0; i < size; i++)
weights[i] += mask.weights[i];
}
void StencilMask::operator-=(const StencilMask& mask)
{
assert(mask.size() == size());
const int size = weights.size();
for(int i = 0; i < size; i++)
weights[i] -= mask.weights[i];
}
void StencilMask::operator*=(float scale)
{
const int size = weights.size();
for(int i = 0; i < size; i++)
weights[i] *= scale;
}
void StencilMask::operator/=(float scale)
{
*this *= 1.0f/scale;
}
float StencilMask::sum() const
{
float total = 0.0f;
const int size = weights.size();
for(int i = 0; i < size; i++)
total += weights[i];
return total;
}
bool StencilMask::is_normalized() const
{
return fabsf(sum() - 1.0f) < 0.0001f;
}
void StencilMask::normalize()
{
*this /= sum();
}
CCL_NAMESPACE_END
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