forked from bartvdbraak/blender
3e9f2938f0
rays from the OSL shader. The "shade" parameter is not supported currently, but
attributes can be retrieved from the object that was hit using the
getmessage("trace", ..) function.
As mentioned in the OSL specification, this function can't be used instead of
lighting, the main purpose is to allow shaders to "probe" nearby geometry, for
example to apply a projected texture that can be blocked by geometry, apply
more “wear” to exposed geometry, or make other ambient occlusion-like effects.
http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/OSL#Trace
Example .blend and render:
http://www.pasteall.org/blend/17347
http://www.pasteall.org/pic/show.php?id=40066
79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __OSL_GLOBALS_H__
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#define __OSL_GLOBALS_H__
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#ifdef WITH_OSL
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#include <OSL/oslexec.h>
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#include "util_map.h"
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#include "util_param.h"
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#include "util_thread.h"
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#include "util_vector.h"
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CCL_NAMESPACE_BEGIN
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class OSLRenderServices;
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struct OSLGlobals {
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/* use */
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bool use;
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/* shading system */
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OSL::ShadingSystem *ss;
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OSLRenderServices *services;
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/* shader states */
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vector<OSL::ShadingAttribStateRef> surface_state;
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vector<OSL::ShadingAttribStateRef> volume_state;
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vector<OSL::ShadingAttribStateRef> displacement_state;
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OSL::ShadingAttribStateRef background_state;
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/* attributes */
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struct Attribute {
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TypeDesc type;
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AttributeElement elem;
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int offset;
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ParamValue value;
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};
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typedef unordered_map<ustring, Attribute, ustringHash> AttributeMap;
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typedef unordered_map<ustring, int, ustringHash> ObjectNameMap;
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vector<AttributeMap> attribute_map;
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ObjectNameMap object_name_map;
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vector<ustring> object_names;
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/* thread key for thread specific data lookup */
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struct ThreadData {
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OSL::ShaderGlobals globals;
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OSL::PerThreadInfo *thread_info;
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};
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static tls_ptr(ThreadData, thread_data);
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};
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CCL_NAMESPACE_END
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#endif
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#endif /* __OSL_GLOBALS_H__ */
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