Blender  V3.3
btContactProcessingStructs.h
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1 #ifndef BT_CONTACT_H_STRUCTS_INCLUDED
2 #define BT_CONTACT_H_STRUCTS_INCLUDED
3 
7 /*
8 This source file is part of GIMPACT Library.
9 
10 For the latest info, see http://gimpact.sourceforge.net/
11 
12 Copyright (c) 2007 Francisco Leon Najera. C.C. 80087371.
13 email: projectileman@yahoo.com
14 
15 
16 This software is provided 'as-is', without any express or implied warranty.
17 In no event will the authors be held liable for any damages arising from the use of this software.
18 Permission is granted to anyone to use this software for any purpose,
19 including commercial applications, and to alter it and redistribute it freely,
20 subject to the following restrictions:
21 
22 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
23 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
24 3. This notice may not be removed or altered from any source distribution.
25 */
26 
27 #include "LinearMath/btTransform.h"
29 #include "btTriangleShapeEx.h"
30 
34 #define NORMAL_CONTACT_AVERAGE 1
35 
36 #define CONTACT_DIFF_EPSILON 0.00001f
37 
41 {
42 public:
45  btScalar m_depth; //Positive value indicates interpenetration
46  btScalar m_distance; //Padding not for use
47  int m_feature1; //Face number
48  int m_feature2; //Face number
49 public:
51  {
52  }
53 
54  GIM_CONTACT(const GIM_CONTACT &contact) : m_point(contact.m_point),
55  m_normal(contact.m_normal),
56  m_depth(contact.m_depth),
57  m_feature1(contact.m_feature1),
58  m_feature2(contact.m_feature2)
59  {
60  }
61 
63  btScalar depth, int feature1, int feature2) : m_point(point),
65  m_depth(depth),
66  m_feature1(feature1),
67  m_feature2(feature2)
68  {
69  }
70 
72  SIMD_FORCE_INLINE unsigned int calc_key_contact() const
73  {
74  int _coords[] = {
75  (int)(m_point[0] * 1000.0f + 1.0f),
76  (int)(m_point[1] * 1333.0f),
77  (int)(m_point[2] * 2133.0f + 3.0f)};
78  unsigned int _hash = 0;
79  unsigned int *_uitmp = (unsigned int *)(&_coords[0]);
80  _hash = *_uitmp;
81  _uitmp++;
82  _hash += (*_uitmp) << 4;
83  _uitmp++;
84  _hash += (*_uitmp) << 8;
85  return _hash;
86  }
87 
89  {
90  btVector3 vec_sum(m_normal);
91  for (int i = 0; i < normal_count; i++)
92  {
93  vec_sum += normals[i];
94  }
95 
96  btScalar vec_sum_len = vec_sum.length2();
97  if (vec_sum_len < CONTACT_DIFF_EPSILON) return;
98 
99  //GIM_INV_SQRT(vec_sum_len,vec_sum_len); // 1/sqrt(vec_sum_len)
100 
101  m_normal = vec_sum / btSqrt(vec_sum_len);
102  }
103 };
104 
105 #endif // BT_CONTACT_H_STRUCTS_INCLUDED
in reality light always falls off quadratically Particle Retrieve the data of the particle that spawned the object for example to give variation to multiple instances of an object Point Retrieve information about points in a point cloud Retrieve the edges of an object as it appears to Cycles topology will always appear triangulated Convert a blackbody temperature to an RGB value Normal Generate a perturbed normal from an RGB normal map image Typically used for faking highly detailed surfaces Generate an OSL shader from a file or text data block Image Sample an image file as a texture Sky Generate a procedural sky texture Noise Generate fractal Perlin noise Wave Generate procedural bands or rings with noise Voronoi Generate Worley noise based on the distance to random points Typically used to generate textures such as or biological cells Brick Generate a procedural texture producing bricks Texture Retrieve multiple types of texture coordinates nTypically used as inputs for texture nodes Vector Convert a point
#define CONTACT_DIFF_EPSILON
float btScalar
The btScalar type abstracts floating point numbers, to easily switch between double and single floati...
Definition: btScalar.h:314
SIMD_FORCE_INLINE btScalar btSqrt(btScalar y)
Definition: btScalar.h:466
#define SIMD_FORCE_INLINE
Definition: btScalar.h:280
btVector3
btVector3 can be used to represent 3D points and vectors. It has an un-used w component to suit 16-by...
Definition: btVector3.h:82
SIMD_FORCE_INLINE void interpolate_normals(btVector3 *normals, int normal_count)
SIMD_FORCE_INLINE unsigned int calc_key_contact() const
Calcs key for coord classification.
GIM_CONTACT(const btVector3 &point, const btVector3 &normal, btScalar depth, int feature1, int feature2)
GIM_CONTACT(const GIM_CONTACT &contact)
IconTextureDrawCall normal
MutableSpan< float3 > normals