1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*
* 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 Mesh;
/* Base */
class Patch {
public:
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__ */
|
