OakPDT Drawing

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

Revision as of 11:18, 10 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
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

@@ Line 24: / Line 24: @@
 | 24 || Array || <code>s</code> symbol table entries
 |-
-| (s * 12) + 0 ||
+| || Integer || Size of drawing definition (<code>v</code>)
+|-
+| || Array || <code>v</code> bytes
+|-
+| || Byte || Paper size
+|-
+| || Struct || Window definition
+|-
+| || Struct || Grid information
+|-
+| || Struct || Text information
+|-
+| || Struct || Dimension information
+|-
+| || Struct || Line style information
 |-
 ! colspan="3" | Symbol table entry
@@ Line 39: / Line 53: @@
 |-
 | 8 || Integer ||
+|-
+! colspan="3" | Window definition
+|-
+| 0 || Double ||
+|-
+| 8 || Double ||
+|-
+| 16 || Double ||
+|-
+| 24 || Double ||
+|-
+! colspan="3" | Grid information
+|-
+| 0 || Double ||
+|-
+| 8 || Double ||
+|-
+| 16 || Double ||
+|-
+| 24 || Double ||
+|-
+| 32 || Integer ||
+|-
+| 36 || Integer ||
+|-
+! colspan="3" | Text information
+|-
+| 0 || Double ||
+|-
+| 8 || Double ||
+|-
+| 16 || Double ||
+|-
+| 24 || Integer ||
+|-
+! colspan="3" | Dimension information
+|-
+| 0 || Double ||
+|-
+| 8 || Double ||
+|-
+| 16 || Double ||
+|-
+| 24 || Double ||
+|-
+| 32 || Integer ||
+|-
+| 36 || Integer ||
+|-
+| 40 || Integer ||
+|-
+| 44 || Integer ||
+|-
+! colspan="3" | Line style information
+|-
+| 0 || Integer ||
+|-
+| 4 || Integer ||
+|-
+| 8 || Integer ||
+|-
+| 12 || Integer ||
 |-
 |}