blender/intern/cycles/kernel/osl/nodes/node_camera.osl
Dalai Felinto 78495ddf32 CameraData Input Cycles Node
----------------------------
reviewed and approved by Brecht 

Important note:
the camera Z is reverted compared to Blender render.
Now it goes from zero (camera) to positive (in front of the camera)
2011-12-02 20:36:13 +00:00

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/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "stdosl.h"
shader node_camera(
output vector ViewVector = vector(0.0, 0.0, 0.0),
output float ViewZDepth = 0.0,
output float ViewDistance = 0.0)
{
ViewVector = (vector)transform("world", "camera", P);
ViewZDepth = fabs(ViewVector[2]);
ViewDistance = lenght(ViewVector);
ViewVector = normalize(ViewVector);
}