forked from bartvdbraak/blender
41 lines
1.4 KiB
Plaintext
41 lines
1.4 KiB
Plaintext
/*
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* Copyright 2011-2013 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 "oslutil.h"
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#include "stdcycles.h"
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shader node_wireframe(string bump_offset = "center",
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int use_pixel_size = 0,
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float Size = 0.01,
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output float Fac = 0.0)
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{
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Fac = wireframe("triangles", Size, use_pixel_size);
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/* TODO(sergey): Since we can't use autodiff here we do algebraic
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* calculation of derivatives by definition. We could probably
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* optimize this a bit by doing some extra calculation in wireframe().
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*/
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if (bump_offset == "dx") {
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point dx = Dx(P);
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P -= dx;
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Fac += (Fac - wireframe("triangles", Size, use_pixel_size)) / length(dx);
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}
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else if (bump_offset == "dy") {
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point dy = Dy(P);
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P -= dy;
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Fac += (Fac - wireframe("triangles", Size, use_pixel_size)) / length(dy);
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}
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}
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