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physxClothMeshDesc.cxx
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file physxClothMeshDesc.cxx
10 * @author enn0x
11 * @date 2010-03-28
12 */
13
14#include "physxClothMeshDesc.h"
15#include "physxManager.h"
16
17#include "nodePathCollection.h"
18#include "geomNode.h"
19#include "geomVertexReader.h"
20
21/**
22 * Sets the number of vertices to be stored within this triangle mesh. The
23 * function allocates memory for the vertices, but it does not set any
24 * vertices.
25 *
26 * This method must be called before any calls to set_vertex are done!
27 */
29set_num_vertices(unsigned int numVertices) {
30
31 // Vertices
32 if (_desc.points) {
33 delete [] _points;
34 }
35
36 _points = new NxVec3[numVertices];
37
38 _desc.numVertices = numVertices;
39 _desc.points = _points;
40
41 // Texture coordinates
42 if (_texcoords) {
43 delete [] _texcoords;
44 }
45
46 _texcoords = new LPoint2f[numVertices];
47}
48
49/**
50 * Sets a single vertex. You have to call the function set_num_vertices
51 * before you can call this function.
52 */
54set_vertex(unsigned int idx, const LPoint3f &vert, const LPoint2f &texcoord) {
55
56 nassertv(_desc.numVertices > idx);
57
58 _points[idx] = PhysxManager::point3_to_nxVec3(vert);
59 _texcoords[idx] = texcoord;
60}
61
62/**
63 * Sets the number of triangles to be stored in this triangle mesh.
64 *
65 * This method must be called before any calls to set_triangle are done!
66 */
68set_num_triangles(unsigned int numTriangles) {
69
70 if (_desc.triangles) {
71 delete [] _triangles;
72 }
73
74 _triangles = new NxU32[3 * numTriangles];
75
76 _desc.numTriangles = numTriangles;
77 _desc.triangles = _triangles;
78}
79
80/**
81 * Sets a single triangle, by providing the three indices i1, i2, i3.
82 */
84set_triangle(unsigned int idx,
85 unsigned int i1, unsigned int i2, unsigned int i3) {
86
87 nassertv(_desc.numTriangles > idx);
88
89 idx = 3 * idx;
90 _triangles[idx] = i1;
91 _triangles[idx + 1] = i2;
92 _triangles[idx + 2] = i3;
93}
94
95/**
96 * A convenience method to set the mesh data from a NodePath in a single call.
97 * The method iterates over the NodePath geoms and collects data for the
98 * triangle mesh.
99 *
100 * Do not use the following function when using this one: - set_num_vertices -
101 * set_vertex - set_num_triangles - set_triangle
102 */
104set_from_node_path(const NodePath &np) {
105
106 pvector<LPoint3f> dataVertices;
107 pvector<LPoint2f> dataTexcoords;
108 pvector<int> dataIndices;
109
110 // Collect data from NodePath
111 NodePathCollection npc = np.find_all_matches( "**/+GeomNode" );
112 for (int i=0; i<npc.get_num_paths(); i++) {
113 NodePath gnp = npc.get_path(i);
114 GeomNode *gnode = DCAST(GeomNode, gnp.node());
115
116 for (int j=0; j<gnode->get_num_geoms(); j++) {
117 CPT(Geom) geom = gnode->get_geom(j);
118 CPT(GeomVertexData) vdata = geom->get_vertex_data();
119 GeomVertexReader reader;
120
121 // Vertices
122 reader = GeomVertexReader(vdata, InternalName::get_vertex());
123 while (!reader.is_at_end()) {
124 dataVertices.push_back(reader.get_data3f());
125 }
126
127 // Texcoords
128 reader = GeomVertexReader(vdata, InternalName::get_texcoord());
129 while (!reader.is_at_end()) {
130 dataTexcoords.push_back(reader.get_data2f());
131 }
132
133 // Indices
134 for (int k=0; k<geom->get_num_primitives(); k++) {
135
136 CPT(GeomPrimitive) prim = geom->get_primitive(k);
137 prim = prim->decompose();
138
139 for (int l=0; l<prim->get_num_primitives(); l++) {
140
141 int s = prim->get_primitive_start(l);
142 int e = prim->get_primitive_end(l);
143
144 for (int l=s; l<e; l++) {
145 dataIndices.push_back(prim->get_vertex(l));
146 }
147 }
148 }
149 }
150 }
151
152 // Set descriptor members
153 int i;
154
155 NxU32 numVertices = dataVertices.size();
156 NxU32 numTriangles = dataIndices.size() / 3;
157
158 _points = new NxVec3[numVertices];
159 _triangles = new NxU32[3 * numTriangles];
160 _texcoords = new LPoint2f[numVertices];
161
162 i = 0;
164 for (vit=dataVertices.begin(); vit!=dataVertices.end(); vit++) {
165 LPoint3f v = *vit;
166
167 _points[i] = PhysxManager::point3_to_nxVec3(v);
168 i++;
169 }
170
171 i = 0;
173 for (tcit=dataTexcoords.begin(); tcit!=dataTexcoords.end(); tcit++) {
174 LPoint2f tc = *tcit;
175
176 _texcoords[i] = tc;
177 i++;
178 }
179
180 i = 0;
182 for(iit=dataIndices.begin(); iit!=dataIndices.end(); iit++) {
183 NxU32 idx = *iit;
184
185 _triangles[i] = idx;
186 i++;
187 }
188
189 _desc.numVertices = numVertices;
190 _desc.points = _points;
191 _desc.numTriangles = numTriangles;
192 _desc.triangles = _triangles;
193}
A node that holds Geom objects, renderable pieces of geometry.
Definition geomNode.h:34
get_num_geoms
Returns the number of geoms in the node.
Definition geomNode.h:71
This is an abstract base class for a family of classes that represent the fundamental geometry primit...
This defines the actual numeric vertex data stored in a Geom, in the structure defined by a particula...
This object provides a high-level interface for quickly reading a sequence of numeric values from a v...
bool is_at_end() const
Returns true if the reader is currently at the end of the list of vertices, false otherwise.
const LVecBase3f & get_data3f()
Returns the data associated with the read row, expressed as a 3-component value, and advances the rea...
const LVecBase2f & get_data2f()
Returns the data associated with the read row, expressed as a 2-component value, and advances the rea...
A container for geometry primitives.
Definition geom.h:54
This is a set of zero or more NodePaths.
get_num_paths
Returns the number of NodePaths in the collection.
get_path
Returns the nth NodePath in the collection.
NodePath is the fundamental system for disambiguating instances, and also provides a higher-level int...
Definition nodePath.h:159
NodePathCollection find_all_matches(const std::string &path) const
Returns the complete set of all NodePaths that begin with this NodePath and can be extended by path.
Definition nodePath.cxx:357
PandaNode * node() const
Returns the referenced node of the path.
Definition nodePath.I:227
void set_vertex(unsigned int idx, const LPoint3f &vert, const LPoint2f &texcoord)
Sets a single vertex.
void set_num_triangles(unsigned int n)
Sets the number of triangles to be stored in this triangle mesh.
void set_triangle(unsigned int idx, unsigned int i1, unsigned int i2, unsigned int i3)
Sets a single triangle, by providing the three indices i1, i2, i3.
void set_num_vertices(unsigned int n)
Sets the number of vertices to be stored within this triangle mesh.
void set_from_node_path(const NodePath &np)
A convenience method to set the mesh data from a NodePath in a single call.
static NxVec3 point3_to_nxVec3(const LPoint3f &p)
Converts from LPoint3f to NxVec3.
This is our own Panda specialization on the default STL vector.
Definition pvector.h:42
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.