forked from bartvdbraak/blender
7d10798af2
The idea of this node is to sampling of 3D voxels at a given coordinate supporting different mapping strategies (world space mapping, object local space etc). Currently not in use, it's a preparation step for supporting point density textures.
48 lines
1.3 KiB
Plaintext
48 lines
1.3 KiB
Plaintext
/*
|
|
* 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 "stdosl.h"
|
|
|
|
shader node_voxel_texture(
|
|
string filename = "",
|
|
string interpolation = "linear",
|
|
int use_mapping = 0,
|
|
matrix mapping = matrix(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
|
|
point Vector = P,
|
|
output float Density = 0,
|
|
output color Color = 0)
|
|
{
|
|
point p = Vector;
|
|
if (use_mapping) {
|
|
p = transform(mapping, p);
|
|
}
|
|
else {
|
|
p = transform("object", Vector);
|
|
matrix tfm;
|
|
if (getattribute("geom:generated_transform", tfm))
|
|
p = transform(tfm, p);
|
|
}
|
|
if(p[0] < 0.0 || p[1] < 0.0 || p[2] < 0.0 ||
|
|
p[0] > 1.0 || p[1] > 1.0 || p[2] > 1.0)
|
|
{
|
|
Density = 0;
|
|
Color = color(0, 0, 0);
|
|
}
|
|
else {
|
|
Color = (color)texture3d(filename, p, "wrap", "periodic", "interp", interpolation, "alpha", Density);
|
|
}
|
|
}
|