forked from bartvdbraak/blender
da376e0237
Cycles uses code from some great open source projects, many thanks them: * BVH building and traversal code from NVidia's "Understanding the Efficiency of Ray Traversal on GPUs": http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/ * Open Shading Language for a large part of the shading system: http://code.google.com/p/openshadinglanguage/ * Blender for procedural textures and a few other nodes. * Approximate Catmull Clark subdivision from NVidia Mesh tools: http://code.google.com/p/nvidia-mesh-tools/ * Sobol direction vectors from: http://web.maths.unsw.edu.au/~fkuo/sobol/ * Film response functions from: http://www.cs.columbia.edu/CAVE/software/softlib/dorf.php
108 lines
2.4 KiB
C++
108 lines
2.4 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef __SUBD_PATCH_H__
|
|
#define __SUBD_PATCH_H__
|
|
|
|
#include "util_boundbox.h"
|
|
#include "util_types.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
class Mesh;
|
|
|
|
/* Base */
|
|
|
|
class Patch {
|
|
public:
|
|
virtual void eval(float3 *P, float3 *dPdu, float3 *dPdv, float u, float v) = 0;
|
|
virtual bool is_triangle() = 0;
|
|
virtual BoundBox bound() = 0;
|
|
};
|
|
|
|
/* Linear Quad Patch */
|
|
|
|
class LinearQuadPatch : public Patch {
|
|
public:
|
|
float3 hull[4];
|
|
|
|
void eval(float3 *P, float3 *dPdu, float3 *dPdv, float u, float v);
|
|
bool is_triangle() { return false; }
|
|
BoundBox bound();
|
|
};
|
|
|
|
/* Linear Triangle Patch */
|
|
|
|
class LinearTrianglePatch : public Patch {
|
|
public:
|
|
float3 hull[3];
|
|
|
|
void eval(float3 *P, float3 *dPdu, float3 *dPdv, float u, float v);
|
|
bool is_triangle() { return true; }
|
|
BoundBox bound();
|
|
};
|
|
|
|
/* Bicubic Patch */
|
|
|
|
class BicubicPatch : public Patch {
|
|
public:
|
|
float3 hull[16];
|
|
|
|
void eval(float3 *P, float3 *dPdu, float3 *dPdv, float u, float v);
|
|
bool is_triangle() { return false; }
|
|
BoundBox bound();
|
|
};
|
|
|
|
/* Bicubic Patch with Tangent Fields */
|
|
|
|
class BicubicTangentPatch : public Patch {
|
|
public:
|
|
float3 hull[16];
|
|
float3 utan[12];
|
|
float3 vtan[12];
|
|
|
|
void eval(float3 *P, float3 *dPdu, float3 *dPdv, float u, float v);
|
|
bool is_triangle() { return false; }
|
|
BoundBox bound();
|
|
};
|
|
|
|
/* Gregory Patches */
|
|
|
|
class GregoryQuadPatch : public Patch {
|
|
public:
|
|
float3 hull[20];
|
|
|
|
void eval(float3 *P, float3 *dPdu, float3 *dPdv, float u, float v);
|
|
bool is_triangle() { return false; }
|
|
BoundBox bound();
|
|
};
|
|
|
|
class GregoryTrianglePatch : public Patch {
|
|
public:
|
|
float3 hull[20];
|
|
|
|
void eval(float3 *P, float3 *dPdu, float3 *dPdv, float u, float v);
|
|
bool is_triangle() { return true; }
|
|
BoundBox bound();
|
|
};
|
|
|
|
CCL_NAMESPACE_END
|
|
|
|
#endif /* __SUBD_PATCH_H__ */
|
|
|