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1 | // Created: 2016-05-01 |
2 | // Author: Andrey Betenev |
3 | // Copyright: Open CASCADE 2016 |
4 | // |
5 | // This file is part of Open CASCADE Technology software library. |
6 | // |
7 | // This library is free software; you can redistribute it and/or modify it under |
8 | // the terms of the GNU Lesser General Public License version 2.1 as published |
9 | // by the Free Software Foundation, with special exception defined in the file |
10 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
11 | // distribution for complete text of the license and disclaimer of any warranty. |
12 | // |
13 | // Alternatively, this file may be used under the terms of Open CASCADE |
14 | // commercial license or contractual agreement. |
15 | |
16 | #ifndef _RWStl_Reader_HeaderFile |
17 | #define _RWStl_Reader_HeaderFile |
18 | |
19 | #include <Message_ProgressIndicator.hxx> |
20 | #include <gp_XYZ.hxx> |
21 | |
22 | //! An abstract class implementing procedure to read STL file. |
23 | //! |
24 | //! This class is not bound to particular data structure and can be used to read the file directly into arbitrary data model. |
25 | //! To use it, create descendant class and implement methods addNode() and addTriangle(). |
26 | //! |
27 | //! Call method Read() to read the file. In the process of reading, the tool will call methods addNode() and addTriangle() to fill the mesh data structure. |
28 | //! |
29 | //! The nodes with equal coordinates are merged automatically on the fly. |
30 | class RWStl_Reader : public Standard_Transient |
31 | { |
32 | DEFINE_STANDARD_RTTIEXT(RWStl_Reader, Standard_Transient) |
33 | public: |
34 | |
35 | //! Reads data from STL file (either binary or Ascii). |
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36 | //! This function supports reading multi-domain STL files formed by concatenation of several "plain" files. |
37 | //! The mesh nodes are not merged between domains. |
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38 | //! Unicode paths can be given in UTF-8 encoding. |
39 | //! Format is recognized automatically by analysis of the file header. |
40 | //! Returns true if success, false on error or user break. |
41 | Standard_EXPORT Standard_Boolean Read (const char* theFile, |
42 | const Handle(Message_ProgressIndicator)& theProgress); |
43 | |
44 | //! Guess whether the stream is an Ascii STL file, by analysis of the first bytes (~200). |
45 | //! The function attempts to put back the read symbols to the stream which thus must support ungetc(). |
46 | //! Returns true if the stream seems to contain Ascii STL. |
47 | Standard_EXPORT Standard_Boolean IsAscii (Standard_IStream& theStream); |
48 | |
49 | //! Reads STL data from binary stream. |
50 | //! The stream must be opened in binary mode. |
51 | //! Stops after reading the number of triangles recorded in the file header. |
52 | //! Returns true if success, false on error or user break. |
53 | Standard_EXPORT Standard_Boolean ReadBinary (Standard_IStream& theStream, |
54 | const Handle(Message_ProgressIndicator)& theProgress); |
55 | |
56 | //! Reads data from the stream assumed to contain Ascii STL data. |
57 | //! The stream can be opened either in binary or in Ascii mode. |
58 | //! Reading stops at the position specified by theUntilPos, |
59 | //! or end of file is reached, or when keyword "endsolid" is found. |
60 | //! Empty lines are not supported and will read to reading failure. |
61 | //! If theUntilPos is non-zero, reads not more than until that position. |
62 | //! Returns true if success, false on error or user break. |
63 | Standard_EXPORT Standard_Boolean ReadAscii (Standard_IStream& theStream, |
64 | const std::streampos theUntilPos, |
65 | const Handle(Message_ProgressIndicator)& theProgress); |
66 | |
67 | public: |
68 | |
69 | //! Callback function to be implemented in descendant. |
70 | //! Should create new node with specified coordinates in the target model, and return its ID as integer. |
71 | virtual Standard_Integer AddNode (const gp_XYZ& thePnt) = 0; |
72 | |
73 | //! Callback function to be implemented in descendant. |
74 | //! Should create new triangle built on specified nodes in the target model. |
75 | virtual void AddTriangle (Standard_Integer theN1, Standard_Integer theN2, Standard_Integer theN3) = 0; |
76 | |
77 | }; |
78 | |
79 | #endif |