blender/intern/cycles/kernel/shaders/node_displacement.osl
Brecht Van Lommel f9ea097a87 Cycles: add Vector Displacement node and extend Displacement node.
This adds midlevel and object/world space for displacement, and a
vector displacement node with tangent/object/world space, midlevel
and scale.

Note that tangent space vector displacement still is not exactly
compatible with maps created by other software, this will require
changes to the tangent computation.

Differential Revision: https://developer.blender.org/D1734
2018-02-03 12:20:26 +01:00

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/*
* Copyright 2011-2013 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_displacement(
string space = "object",
float Height = 0.0,
float Midlevel = 0.5,
float Scale = 1.0,
normal Normal = N,
output vector Displacement = vector(0.0, 0.0, 0.0))
{
Displacement = Normal;
if(space == "object") {
Displacement = transform("object", Displacement);
}
Displacement = normalize(Displacement) * (Height - Midlevel) * Scale;
if(space == "object") {
Displacement = transform("object", "world", Displacement);
}
}