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
110 lines
3.5 KiB
C++
110 lines
3.5 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_SERVICES_H__
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#define __OSL_SERVICES_H__
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/* OSL Render Services
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*
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* Implementation of OSL render services, to retriever matrices, attributes,
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* textures and point clouds. In principle this should only be accessing
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* kernel data, but currently we also reach back into the Scene to retrieve
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* attributes.
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*/
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#include <OSL/oslexec.h>
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#include <OSL/oslclosure.h>
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CCL_NAMESPACE_BEGIN
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class Object;
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class Scene;
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class Shader;
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struct ShaderData;
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struct float3;
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struct KernelGlobals;
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class OSLRenderServices : public OSL::RendererServices
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{
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public:
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OSLRenderServices();
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~OSLRenderServices();
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void thread_init(KernelGlobals *kernel_globals);
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bool get_matrix(OSL::Matrix44 &result, OSL::TransformationPtr xform, float time);
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bool get_inverse_matrix(OSL::Matrix44 &result, OSL::TransformationPtr xform, float time);
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bool get_matrix(OSL::Matrix44 &result, ustring from, float time);
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bool get_inverse_matrix(OSL::Matrix44 &result, ustring to, float time);
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bool get_matrix(OSL::Matrix44 &result, OSL::TransformationPtr xform);
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bool get_inverse_matrix(OSL::Matrix44 &result, OSL::TransformationPtr xform);
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bool get_matrix(OSL::Matrix44 &result, ustring from);
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bool get_inverse_matrix(OSL::Matrix44 &result, ustring from);
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bool get_array_attribute(void *renderstate, bool derivatives,
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ustring object, TypeDesc type, ustring name,
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int index, void *val);
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bool get_attribute(void *renderstate, bool derivatives, ustring object,
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TypeDesc type, ustring name, void *val);
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bool get_userdata(bool derivatives, ustring name, TypeDesc type,
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void *renderstate, void *val);
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bool has_userdata(ustring name, TypeDesc type, void *renderstate);
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int pointcloud_search(OSL::ShaderGlobals *sg, ustring filename, const OSL::Vec3 ¢er,
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float radius, int max_points, bool sort, size_t *out_indices,
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float *out_distances, int derivs_offset);
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int pointcloud_get(ustring filename, size_t *indices, int count, ustring attr_name,
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TypeDesc attr_type, void *out_data);
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bool trace(TraceOpt &options, OSL::ShaderGlobals *sg,
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const OSL::Vec3 &P, const OSL::Vec3 &dPdx,
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const OSL::Vec3 &dPdy, const OSL::Vec3 &R,
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const OSL::Vec3 &dRdx, const OSL::Vec3 &dRdy);
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bool getmessage(OSL::ShaderGlobals *sg, ustring source, ustring name,
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TypeDesc type, void *val, bool derivatives);
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struct TraceData {
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Ray ray;
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Intersection isect;
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ShaderData sd;
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bool setup;
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};
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static ustring u_distance;
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static ustring u_index;
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static ustring u_camera;
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static ustring u_screen;
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static ustring u_raster;
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static ustring u_ndc;
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static ustring u_empty;
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private:
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KernelGlobals *kernel_globals;
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};
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CCL_NAMESPACE_END
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#endif /* __OSL_SERVICES_H__ */
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