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Diffstat (limited to 'intern/cycles/util/util_math_cdf.h')
-rw-r--r-- | intern/cycles/util/util_math_cdf.h | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/intern/cycles/util/util_math_cdf.h b/intern/cycles/util/util_math_cdf.h deleted file mode 100644 index 43995204263..00000000000 --- a/intern/cycles/util/util_math_cdf.h +++ /dev/null @@ -1,75 +0,0 @@ -/* - * Copyright 2011-2015 Blender Foundation - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#ifndef __UTIL_MATH_CDF_H__ -#define __UTIL_MATH_CDF_H__ - -#include "util/util_algorithm.h" -#include "util/util_math.h" -#include "util/util_vector.h" - -CCL_NAMESPACE_BEGIN - -/* Evaluate CDF of a given functor with given range and resolution. */ -template<typename Functor> -void util_cdf_evaluate( - const int resolution, const float from, const float to, Functor functor, vector<float> &cdf) -{ - const int cdf_count = resolution + 1; - const float range = to - from; - cdf.resize(cdf_count); - cdf[0] = 0.0f; - /* Actual CDF evaluation. */ - for (int i = 0; i < resolution; ++i) { - float x = from + range * (float)i / (resolution - 1); - float y = functor(x); - cdf[i + 1] = cdf[i] + fabsf(y); - } - /* Normalize the CDF. */ - for (int i = 0; i <= resolution; i++) { - cdf[i] /= cdf[resolution]; - } -} - -/* Invert pre-calculated CDF function. */ -void util_cdf_invert(const int resolution, - const float from, - const float to, - const vector<float> &cdf, - const bool make_symmetric, - vector<float> &inv_cdf); - -/* Evaluate inverted CDF of a given functor with given range and resolution. */ -template<typename Functor> -void util_cdf_inverted(const int resolution, - const float from, - const float to, - Functor functor, - const bool make_symmetric, - vector<float> &inv_cdf) -{ - vector<float> cdf; - /* There is no much smartness going around lower resolution for the CDF table, - * this just to match the old code from pixel filter so it all stays exactly - * the same and no regression tests are failed. - */ - util_cdf_evaluate(resolution - 1, from, to, functor, cdf); - util_cdf_invert(resolution, from, to, cdf, make_symmetric, inv_cdf); -} - -CCL_NAMESPACE_END - -#endif /* __UTIL_MATH_H_CDF__ */ |