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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::Scene& b_scene, BL::SceneLayer& b_scene_layer,
BL::ShaderNodeTexPointDensity& b_point_density_node,
int settings,
float3& loc,
float3& size)
{
BL::Object b_ob(b_point_density_node.object());
if(!b_ob) {
loc = make_float3(0.0f, 0.0f, 0.0f);
size = make_float3(0.0f, 0.0f, 0.0f);
return;
}
float3 min, max;
b_point_density_node.calc_point_density_minmax(b_scene,
b_scene_layer,
settings,
&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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