forked from bartvdbraak/blender
227a94077f
This attribute means how "pointy" the geometry surface is, which allows to do effects like dirt maps and wear-off effects on render geometry. This means the attribute is calculated for the final mesh which means no baking (which implies UV unwrap) is needed. Apart from this the behavior is quite close to how vertex dirty colors works. The new attribute is available as an output socket of Geometry node. There's no penalty for the render time, only some delay on scene preparation (the delay is linear of the mesh complexity). Reviewers: brecht, juicyfruit Subscribers: eyecandy, venomgfx Differential Revision: https://developer.blender.org/D1086
65 lines
1.8 KiB
Plaintext
65 lines
1.8 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 "stdosl.h"
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shader node_geometry(
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normal NormalIn = N,
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string bump_offset = "center",
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output point Position = point(0.0, 0.0, 0.0),
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output normal Normal = normal(0.0, 0.0, 0.0),
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output normal Tangent = normal(0.0, 0.0, 0.0),
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output normal TrueNormal = normal(0.0, 0.0, 0.0),
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output vector Incoming = vector(0.0, 0.0, 0.0),
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output point Parametric = point(0.0, 0.0, 0.0),
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output float Backfacing = 0.0,
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output float Pointiness = 0.0)
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{
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Position = P;
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Normal = NormalIn;
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TrueNormal = Ng;
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Incoming = I;
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Parametric = point(u, v, 0.0);
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Backfacing = backfacing();
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if (bump_offset == "dx") {
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Position += Dx(Position);
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Parametric += Dx(Parametric);
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}
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else if (bump_offset == "dy") {
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Position += Dy(Position);
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Parametric += Dy(Parametric);
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}
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/* first try to get tangent attribute */
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point generated;
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/* try to create spherical tangent from generated coordinates */
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if (getattribute("geom:generated", generated)) {
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normal data = normal(-(generated[1] - 0.5), (generated[0] - 0.5), 0.0);
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vector T = transform("object", "world", data);
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Tangent = cross(Normal, normalize(cross(T, Normal)));
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}
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else {
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/* otherwise use surface derivatives */
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Tangent = normalize(dPdu);
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}
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getattribute("geom:pointiness", Pointiness);
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}
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