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/*
* 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.
*/
#include "blender/blender_texture.h"
CCL_NAMESPACE_BEGIN
namespace {
/* Point density helpers. */
void density_texture_space_invert(float3 &loc, float3 &size)
{
if (size.x != 0.0f)
size.x = 0.5f / size.x;
if (size.y != 0.0f)
size.y = 0.5f / size.y;
if (size.z != 0.0f)
size.z = 0.5f / size.z;
loc = loc * size - make_float3(0.5f, 0.5f, 0.5f);
}
} /* namespace */
void point_density_texture_space(BL::Depsgraph &b_depsgraph,
BL::ShaderNodeTexPointDensity &b_point_density_node,
float3 &loc,
float3 &size)
{
BL::Object b_ob(b_point_density_node.object());
if (!b_ob) {
loc = zero_float3();
size = zero_float3();
return;
}
float3 min, max;
b_point_density_node.calc_point_density_minmax(b_depsgraph, &min[0], &max[0]);
loc = (min + max) * 0.5f;
size = (max - min) * 0.5f;
density_texture_space_invert(loc, size);
}
CCL_NAMESPACE_END
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