forked from bartvdbraak/blender
Brecht Van Lommel
fadb6f3466
This adds our own OSL texture handle, that has info for OIIO textures or our own custom texture types. A filename to handle hash map is used for lookups. This is efficient because it happens at OSL compile time, because the optimizer can figure out constant strings and replace them with texture handles.
42 lines
1.2 KiB
Plaintext
42 lines
1.2 KiB
Plaintext
/*
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* Copyright 2011-2015 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "stdosl.h"
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#include "node_texture.h"
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/* IES Light */
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shader node_ies_light(int use_mapping = 0,
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matrix mapping = matrix(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
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string filename = "",
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float Strength = 1.0,
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point Vector = I,
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output float Fac = 0.0)
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{
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point p = Vector;
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if (use_mapping) {
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p = transform(mapping, p);
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}
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p = normalize(p);
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float v_angle = acos(-p[2]);
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float h_angle = atan2(p[0], p[1]) + M_PI;
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Fac = Strength * texture(filename, h_angle, v_angle);
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}
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