OakPDT Drawing

File Format
Name	OakPDT Drawing
Ontology	Electronic File Formats 3D and CAD/CAM Models OakPDT Drawing ; ; ;

Revision as of 09:07, 11 October 2022

OakPDT is a 2D parametric CAD system for RISC OS. On RISC OS systems, files in this format typically have a filetype of CAD ("PDT Dwg").

File Header
0	Byte	Major version number of the file format (always 1)
1	Byte	Minor version number of the format 2 corresponds to OakPDT v2.50 (17 November 1990)
2	Null-terminated string	`The_Design_System` or `Oak_P_D_T_Drawing`
20	Integer	Number of symbols (`s`)
24	Array	`s` symbol table entries
	Integer	Size of drawing definition (`v`)
	Array	`v` bytes
	Byte	Paper size
	Struct	Window definition
	Struct	Grid information
	Struct	Text information
	Struct	Dimension information
	Struct	Line style information
	Integer	Number of scalars (`n`)
	Array	`n` scalar table entries
	Struct	Error information
Symbol table entry
0	Byte
1	Byte
2	Byte
3	Byte
4	Integer
8	Integer
Window definition
0	Double
8	Double
16	Double
24	Double
Grid information
0	Double
8	Double
16	Double
24	Double
32	Integer
36	Integer
Text information
0	Double
8	Double
16	Double
24	Integer
Dimension information
0	Double
8	Double
16	Double
24	Double
32	Integer
36	Integer
40	Integer
44	Integer
Line style information
0	Integer
4	Integer
8	Integer
12	Integer
Scalar table entry
0	Integer
4	Null-terminated string
Error information
0	Integer
4	Null-terminated string

@@ Line 39: / Line 39: @@
 |-
 | || Struct || Line style information
+|-
+| || Integer || Number of scalars (<code>n</code>)
+|-
+| || Array || <code>n</code> scalar table entries
+|-
+| || Struct || Error information
 |-
 ! colspan="3" | Symbol table entry
@@ Line 115: / Line 121: @@
 |-
 | 12 || Integer ||
+|-
+! colspan="3" | Scalar table entry
+|-
+| 0 || Integer ||
+|-
+| 4 || Null-terminated string ||
+|-
+! colspan="3" | Error information
+|-
+| 0 || Integer ||
+|-
+| 4 || Null-terminated string ||
 |-
 |}