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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __SUBD_PATCH_H__
#define __SUBD_PATCH_H__
#include "util_boundbox.h"
#include "util_types.h"
CCL_NAMESPACE_BEGIN
class Patch {
public:
virtual ~Patch() {}
virtual void eval(float3 *P, float3 *dPdu, float3 *dPdv, float3 *N, float u, float v) = 0;
virtual bool is_triangle() { return false; }
virtual BoundBox bound() = 0;
virtual int ptex_face_id() { return -1; }
};
/* Linear Quad Patch */
class LinearQuadPatch : public Patch {
public:
float3 hull[4];
float3 normals[4];
void eval(float3 *P, float3 *dPdu, float3 *dPdv, float3 *N, float u, float v);
bool is_triangle() { return false; }
BoundBox bound();
};
/* Linear Triangle Patch */
class LinearTrianglePatch : public Patch {
public:
float3 hull[3];
float3 normals[3];
void eval(float3 *P, float3 *dPdu, float3 *dPdv, float3 *N, 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, float3 *N, float u, float v);
bool is_triangle() { return false; }
BoundBox bound();
};
CCL_NAMESPACE_END
#endif /* __SUBD_PATCH_H__ */
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