blender/intern/cycles/subd/subd_patch.h

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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.
*/
#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:
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virtual ~Patch() {}
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__ */