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dxfToEggConverter.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 dxfToEggConverter.cxx
10 * @author drose
11 * @date 2004-05-04
12 */
13
14#include "dxfToEggConverter.h"
15#include "dxfToEggLayer.h"
16#include "eggData.h"
17
18/**
19 *
20 */
21DXFToEggConverter::
22DXFToEggConverter() {
23}
24
25/**
26 *
27 */
28DXFToEggConverter::
29DXFToEggConverter(const DXFToEggConverter &copy) :
30 SomethingToEggConverter(copy)
31{
32}
33
34/**
35 *
36 */
37DXFToEggConverter::
38~DXFToEggConverter() {
39}
40
41/**
42 * Allocates and returns a new copy of the converter.
43 */
44SomethingToEggConverter *DXFToEggConverter::
45 make_copy() {
46 return new DXFToEggConverter(*this);
47}
48
49
50/**
51 * Returns the English name of the file type this converter supports.
52 */
53std::string DXFToEggConverter::
54 get_name() const {
55 return "DXF";
56}
57
58/**
59 * Returns the common extension of the file type this converter supports.
60 */
61std::string DXFToEggConverter::
62 get_extension() const {
63 return "dxf";
64}
65
66/**
67 * Returns true if this file type can transparently load compressed files
68 * (with a .pz extension), false otherwise.
69 */
70 bool DXFToEggConverter::
71 supports_compressed() const {
72 return true;
73}
74
75/**
76 * Handles the reading of the input file and converting it to egg. Returns
77 * true if successful, false otherwise.
78 */
79 bool DXFToEggConverter::
80 convert_file(const Filename &filename) {
81 clear_error();
82
83 if (_egg_data->get_coordinate_system() == CS_default) {
84 _egg_data->set_coordinate_system(CS_zup_right);
85 }
86
87 process(filename);
88 return !had_error();
89}
90
91/**
92 *
93 */
94 DXFLayer *DXFToEggConverter::
95new_layer(const std::string &name) {
96 return new DXFToEggLayer(name, get_egg_data());
97}
98
99/**
100 * If the entity is a polygon, creates the corresponding egg polygon.
101 */
102 void DXFToEggConverter::
103done_entity() {
104 if (_entity == EN_polyline) {
105 // A Polyline is either an unclosed series of connected line segments, or
106 // a closed polygon of arbitrary complexity.
107
108 if ((_flags & PF_3d) == 0) {
109 // it's a 2-d polygon; convert it to 3-d coordinates.
110 ocs_2_wcs();
111 }
112
113 if (_flags & PF_closed) {
114 // it's closed; create a polygon.
115 nassertv(_layer!=nullptr);
116 ((DXFToEggLayer *)_layer)->add_polygon(this);
117 } else {
118 // It's open; create a series of line segments.
119 nassertv(_layer!=nullptr);
120 ((DXFToEggLayer *)_layer)->add_line(this);
121 }
122
123 } else if (_entity == EN_3dface) {
124 // DXF can also represent a polygon as a 3DFace. This might be either a
125 // quad or a triangle (if two of the vertices are the same). We'll add
126 // the vertices to our list of vertices and then define the polygon.
127 _verts.clear();
128 _verts.push_back(DXFVertex(_s));
129 _verts.push_back(DXFVertex(_r));
130 _verts.push_back(DXFVertex(_q));
131 _verts.push_back(DXFVertex(_p));
132
133 nassertv(_layer!=nullptr);
134 ((DXFToEggLayer *)_layer)->add_polygon(this);
135 }
136}
137
138/**
139 * A hook for user code, if desired. This function is called when some
140 * unexpected error occurs while reading the DXF file.
141 */
142 void DXFToEggConverter::
143error() {
144 _error = true;
145}
DXFFile::process
void process(Filename filename)
Opens the indicated filename and reads it as a DXF file.
Definition dxfFile.cxx:310
DXFFile::ocs_2_wcs
void ocs_2_wcs()
Assuming the current entity is a planar-based entity, for instance, a 2-d polygon (as opposed to a 3-...
Definition dxfFile.cxx:482
DXFLayer
This represents a "layer" as read from the DXF file.
Definition dxfLayer.h:28
DXFToEggConverter
This class supervises the construction of an EggData structure from a DXF file.
Definition dxfToEggConverter.h:26
DXFToEggConverter::get_name
virtual std::string get_name() const
Returns the English name of the file type this converter supports.
Definition dxfToEggConverter.cxx:54
DXFToEggConverter::supports_compressed
virtual bool supports_compressed() const
Returns true if this file type can transparently load compressed files (with a .pz extension),...
Definition dxfToEggConverter.cxx:71
DXFToEggConverter::get_extension
virtual std::string get_extension() const
Returns the common extension of the file type this converter supports.
Definition dxfToEggConverter.cxx:62
DXFToEggConverter::make_copy
virtual SomethingToEggConverter * make_copy()
Allocates and returns a new copy of the converter.
Definition dxfToEggConverter.cxx:45
DXFToEggConverter::convert_file
virtual bool convert_file(const Filename &filename)
Handles the reading of the input file and converting it to egg.
Definition dxfToEggConverter.cxx:80
DXFToEggLayer
The specialization of DXFLayer used by DXFToEggConverter.
Definition dxfToEggLayer.h:35
Filename
The name of a file, such as a texture file or an Egg file.
Definition filename.h:44
SomethingToEggConverter
This is a base class for a family of converter classes that manage a conversion from some file type t...
Definition somethingToEggConverter.h:38
SomethingToEggConverter::had_error
bool had_error() const
Returns true if an error was detected during the conversion process (unless _allow_errors is true),...
Definition somethingToEggConverter.I:28
SomethingToEggConverter::get_egg_data
EggData * get_egg_data()
Returns the EggData structure.
Definition somethingToEggConverter.I:380
SomethingToEggConverter::clear_error
void clear_error()
Resets the error flag to the no-error state.
Definition somethingToEggConverter.I:19
dxfToEggConverter.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
dxfToEggLayer.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
eggData.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.