!AWJan95/Goodies/DrawBasic/!DrawBasic/Resources/Paths

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This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.

Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.

Tape/disk:	Home » Archimedes archive » Archimedes World » AW-1995-01-Disc1.adf » Disk1Jan95
Filename:	!AWJan95/Goodies/DrawBasic/!DrawBasic/Resources/Paths
Read OK:	✔
File size:	19C6 bytes
Load address:	0000
Exec address:	0000

Duplicates

There is 1 duplicate copy of this file in the archive:

Archimedes archive » Archimedes World » AW-1994-12-Disc1.adf » Disk1Dec94 » !AWDec94/Goodies/DrawBasic/!DrawBasic/Resources/Paths
Archimedes archive » Archimedes World » AW-1995-01-Disc1.adf » Disk1Jan95 » !AWJan95/Goodies/DrawBasic/!DrawBasic/Resources/Paths

File contents

    1REM >DrawBasic:Resources.Paths
    2
    3REM =======================================================
    4REM
    5REM copyright Joe Taylor June 1994
    6REM
    7REM N.B. For ERROR THROWBACK to work The first line above
    8REM      MUST have the correct pathname of this file.
    9REM      If you move the location of the file remember to
   10REM      alter this pathname.
   11REM
   12REM =======================================================
   13
   14REM *****************************************************************
   15REM
   16REM 2. Paths
   17REM
   18REM *****************************************************************
   19
   20REM ==================
   21REM 2.1 Creating Paths
   22REM ==================
   23
   24DEF FNCurrentPath=!(HIMEM+64)
   25
   26DEF PROCCurrentPath(path%)
   27!(HIMEM+64)=path%
   28ENDPROC
   29
   30DEF FNCurrentSubpath=!(HIMEM+68)
   31
   32DEF PROCCurrentSubpath(path%)
   33!(HIMEM+68)=path%
   34ENDPROC
   35
   36DEF PROCPathBegin(RETURN path)
   37 REM -----------------------------
   38 REM
   39 REM Creates path header
   40 REM requires 40 bytes
   41 REM
   42 REM -----------------------------
   43 IF FNCurrentPath<>0 THEN ERROR 0,"Can't begin path until previous path ended"
   44 PROCCurrentPath(!HIMEM)
   45   IF FNCurrentPath>=!(HIMEM+4) THEN
   46    ERROR 0,"Out of memory. Increase the 'Free' slot."
   47   ELSE
   48     !(HIMEM+4)-=4
   49     path=!(HIMEM+4)
   50     !path=FNCurrentPath
   51     PROCDraw_PathHeader
   52     IF FNDash<>0 THEN PROCDash@(path,FNDash)
   53   ENDIF
   54 ENDPROC
   55
   56DEF PROCDraw_PathHeader
   57 PROCDraw_AddWord(0)
   58 PROCDraw_AddWord(44)            : REM Number of bytes in object
   59 PROCDraw_AddWord(-1<<30)        : REM bounding box - xmin
   60 PROCDraw_AddWord(-1<<30)        : REM bounding box - ymin
   61 PROCDraw_AddWord(1<<30)         : REM bounding box - xmax
   62 PROCDraw_AddWord(1<<30)         : REM bounding box - ymax
   63 PROCDraw_AddWord(FNFillColour)  : REM Fill colour.    Default=don't fill
   64 PROCDraw_AddWord(FNLineColour)  : REM Outline colour. Default=black
   65 PROCDraw_AddWord(FNLineWidth)   : REM Line width.     Default=thinnest
   66 PROCDraw_AddWord(FNStyle)       : REM Line style.     Default=mitre+butt
   67ENDPROC
   68
   69DEF PROCPathEnd
   70 REM -----------------------------
   71 REM
   72 REM Closes Draw_Path% Object
   73 REM
   74 REM 1 word
   75 REM -----------------------------
   76 IF FNCurrentPath=0 ERROR 0,"A path must begin with 'PathBegin()'"
   77 IF FNCurrentSubpath=0 OR !FNCurrentPath=0 THEN
   78   !HIMEM=FNCurrentPath
   79   PROCCurrentPath(0)                         : PROCCurrentSubpath(0)
   80   ELSE
   81    PROCDraw_AddWord(0)                        : REM Close path
   82    !(FNCurrentPath+4)=(!HIMEM)-FNCurrentPath  : REM Store path length in header
   83    !(FNCurrentPath)=2                         : REM Draw object is a Path
   84    PROCDraw_RenderPath(FNCurrentPath,FNDrawTrans)
   85    PROCCurrentPath(0)                         : PROCCurrentSubpath(0)
   86   ENDIF
   87 ENDPROC
   88
   89REM ============
   90REM 2.2 SubPaths
   91REM ============
   92
   93DEF FNDrawTrans=HIMEM+96
   94
   95DEF PROCMove(x,y)
   96 REM ----------------------------------
   97 REM Move to x,y starting new subpath
   98 REM This DOES affect winding numbers
   99 REM so Draw_Path% is filled normally
  100 REM
  101 REM 3 words ( x 4 bytes)
  102 REM ----------------------------------
  103 IF FNCurrentPath=0 THEN ERROR EXT 1,"Can't Move if No PathBegun"
  104 PROCDraw_AddWord(2)
  105 PROCCurrentSubpath(!HIMEM)
  106 PROCDraw_AddCoords(x,y)
  107 MOVE (!(HIMEM+112)+FNDraw_X(x))>>8,(!(HIMEM+116)+FNDraw_Y(y))>>8
  108 ENDPROC
  109
  110DEF PROCMOVE(x%,y%)
  111 REM ----------------------------------
  112 REM Move to x,y starting new subpath
  113 REM This DOES affect winding numbers
  114 REM so Draw_Path% is filled normally
  115 REM
  116 REM 3 words ( x 4 bytes)
  117 REM ----------------------------------
  118 IF FNCurrentPath=0 THEN ERROR EXT 1,"Can't Move if No PathBegun"
  119 PROCDraw_AddWord(2)
  120 PROCCurrentSubpath(!HIMEM)
  121 PROCDraw_AddWord(x%): : PROCDraw_AddWord(y%)
  122 MOVE (!(HIMEM+112)+x%)>>8,(!(HIMEM+116)+y%)>>8
  123 ENDPROC
  124
  125DEF PROCDraw(x,y)
  126 REM --------------------
  127 REM Line to (x,y)
  128 REM
  129 REM 3 words ( x 4 bytes)
  130 REM --------------------
  131 LOCAL _path% : _path%=!(HIMEM+4)
  132 IF FNCurrentPath=0    ERROR EXT 1,"Paths must begin with 'PathBegin()"
  133 IF FNCurrentSubpath=0 ERROR EXT 0,"Subpaths must begin with a Move before Draw"
  134 PROCDraw_AddWord(8)
  135 PROCDraw_AddCoords(x,y)
  136 DRAW (!(HIMEM+112)+FNDraw_X(x))>>8,(!(HIMEM+116)+FNDraw_Y(y))>>8
  137 !(FNCurrentPath)=TRUE
  138ENDPROC
  139
  140DEF PROCDRAW(x%,y%)
  141 REM --------------------
  142 REM Line to (x,y)
  143 REM
  144 REM 3 words ( x 4 bytes)
  145 REM --------------------
  146 LOCAL _path% : _path%=!(HIMEM+4)
  147 IF FNCurrentPath=0    ERROR EXT 1,"Paths must begin with 'PathBegin()"
  148 IF FNCurrentSubpath=0 ERROR EXT 0,"Subpaths must begin with a Move before Draw"
  149 PROCDraw_AddWord(8)
  150 PROCDraw_AddWord(x%) : PROCDraw_AddWord(y%)
  151 DRAW (!(HIMEM+112)+x%)>>8,(!(HIMEM+116)+y%)>>8
  152 !(FNCurrentPath)=TRUE
  153ENDPROC
  154
  155
  156DEF PROCBezier(a,b,c,d,x,y)
  157 REM ---------------------------------------------------
  158 REM Bezier curve passing through current point and (x,y)
  159 REM with control points (a,b) and (c,d)
  160 REM
  161 REM 7 words ( x 4 bytes)
  162 REM ---------------------------------------------------
  163 LOCAL _path%,_store% : _path%=!(HIMEM+4)
  164 IF FNCurrentPath=0    ERROR EXT 1,"Can't Draw Bezier if No PathBegun"
  165 IF FNCurrentSubpath=0 ERROR EXT 0,"Subpath must start with Move before Bezier"
  166 _path%=!HIMEM : _path%-=12 : _store%=!_path% : !_path%=2
  167   PROCDraw_AddWord(6)
  168   PROCDraw_AddCoords(a,b)
  169   PROCDraw_AddCoords(c,d)
  170   PROCDraw_AddCoords(x,y)
  171   PROCDraw_AddWord(0)
  172   !HIMEM-=4
  173   SYS "Draw_Stroke",_path%,,FNDrawTrans
  174   !_path%=_store%
  175   !(FNCurrentPath)=TRUE
  176   MOVE (!(HIMEM+112)+FNDraw_X(x))>>8,(!(HIMEM+116)+FNDraw_Y(y))>>8
  177 ENDPROC
  178
  179DEF PROCCloseWithLine
  180 REM ---------------------------------
  181 REM Close current subpath with a line
  182 REM
  183 REM 1 word
  184 REM ---------------------------------
  185 IF  FNCurrentPath=0 ERROR EXT 1,"Can't closewithline if No PathBegun"
  186 IF  FNCurrentSubpath=0 ERROR EXT 0,"Can't closewithline without a Move"
  187 LOCAL _x%,_y%
  188 _x%=!FNCurrentSubpath: _y%=!(FNCurrentSubpath+4)
  189 DRAW (!(HIMEM+112)+_x%)>>8,(!(HIMEM+116)+_y%)>>8
  190 PROCDraw_AddWord(5)
  191 ENDPROC
  192
  193REM =====================
  194REM 2.3 Polar Coordinates
  195REM =====================
  196
  197DEF PROCDrawPolar(r,theta)
  198 REM ----------------------------------
  199 REM Move to x,y starting new subDraw_Path%
  200 REM This DOES affect winding numbers
  201 REM so Draw_Path% is filled normally
  202 REM
  203 REM 3 words ( x 4 bytes)
  204 REM ----------------------------------
  205 PROCDraw(r*COStheta,r*SINtheta)
  206 ENDPROC
  207
  208DEF PROCMovePolar(r,theta)
  209 REM ----------------------------------
  210 REM Move to x,y starting new subDraw_Path%
  211 REM This DOES affect winding numbers
  212 REM so Draw_Path% is filled normally
  213 REM
  214 REM 3 words ( x 4 bytes)
  215 REM ----------------------------------
  216 PROCMove(r*COStheta,r*SINtheta)
  217 ENDPROC
  218
  219DEF FNModulus(x,y)=SQR(x*x+y*y)
  220
  221DEF FNArgument(y,x)
  222LOCAL _argument
  223CASE TRUE OF
  224 WHEN x=0 : _argument=(PI/2)*SGNy
  225 WHEN x>0 : _argument=ATN(y/x)
  226 WHEN x<0 : _argument=PI+ATN(y/x)
  227ENDCASE
  228=_argument
  229
  230

 � >DrawBasic:Resources.Paths

=� =======================================================
�
$� copyright Joe Taylor June 1994
�
;� N.B. For ERROR THROWBACK to work The first line above
7�      MUST have the correct pathname of this file.
	;�      If you move the location of the file remember to

�      alter this pathname.
�
=� =======================================================


G� *****************************************************************
�
� 2. Paths
�
G� *****************************************************************

� ==================
� 2.1 Creating Paths
� ==================

� �CurrentPath=!(�+64)

� �CurrentPath(path%)
!(�+64)=path%
�

� �CurrentSubpath=!(�+68)

 � �CurrentSubpath(path%)
!!(�+68)=path%
"�
#
$� �PathBegin(� path)
%$ � -----------------------------
& �
' � Creates path header
( � requires 40 bytes
) �
*$ � -----------------------------
+I � �CurrentPath<>0 � � 0,"Can't begin path until previous path ended"
, �CurrentPath(!�)
-   � �CurrentPath>=!(�+4) �
.6    � 0,"Out of memory. Increase the 'Free' slot."
/   �
0     !(�+4)-=4
1     path=!(�+4)
2     !path=�CurrentPath
3     �Draw_PathHeader
4(     � �Dash<>0 � �Dash@(path,�Dash)
5   �
6 �
7
8� �Draw_PathHeader
9 �Draw_AddWord(0)
:? �Draw_AddWord(44)            : � Number of bytes in object
;9 �Draw_AddWord(-1<<30)        : � bounding box - xmin
<9 �Draw_AddWord(-1<<30)        : � bounding box - ymin
=9 �Draw_AddWord(1<<30)         : � bounding box - xmax
>9 �Draw_AddWord(1<<30)         : � bounding box - ymax
?G �Draw_AddWord(�FillColour)  : � Fill colour.    Default=don't fill
@B �Draw_AddWord(�LineColour)  : � Outline colour. Default=black
AE �Draw_AddWord(�LineWidth)   : � Line width.     Default=thinnest
BG �Draw_AddWord(�Style)       : � Line style.     Default=mitre+butt
C�
D
E� �PathEnd
F$ � -----------------------------
G �
H � Closes Draw_Path% Object
I �
J
 � 1 word
K$ � -----------------------------
L@ � �CurrentPath=0 � 0,"A path must begin with 'PathBegin()'"
M, � �CurrentSubpath=0 � !�CurrentPath=0 �
N   !�=�CurrentPath
OC   �CurrentPath(0)                         : �CurrentSubpath(0)
P   �
Q>    �Draw_AddWord(0)                        : � Close path
RL    !(�CurrentPath+4)=(!�)-�CurrentPath  : � Store path length in header
SK    !(�CurrentPath)=2                         : � Draw object is a Path
T1    �Draw_RenderPath(�CurrentPath,�DrawTrans)
UD    �CurrentPath(0)                         : �CurrentSubpath(0)
V   �
W �
X
Y� ============
Z� 2.2 SubPaths
[� ============
\
]� �DrawTrans=�+96
^
_� �Move(x,y)
`) � ----------------------------------
a' � Move to x,y starting new subpath
b' � This DOES affect winding numbers
c' � so Draw_Path% is filled normally
d �
e � 3 words ( x 4 bytes)
f) � ----------------------------------
g: � �CurrentPath=0 � � � 1,"Can't Move if No PathBegun"
h �Draw_AddWord(2)
i �CurrentSubpath(!�)
j �Draw_AddCoords(x,y)
k8 � (!(�+112)+�Draw_X(x))>>8,(!(�+116)+�Draw_Y(y))>>8
l �
m
n� �MOVE(x%,y%)
o) � ----------------------------------
p' � Move to x,y starting new subpath
q' � This DOES affect winding numbers
r' � so Draw_Path% is filled normally
s �
t � 3 words ( x 4 bytes)
u) � ----------------------------------
v: � �CurrentPath=0 � � � 1,"Can't Move if No PathBegun"
w �Draw_AddWord(2)
x �CurrentSubpath(!�)
y+ �Draw_AddWord(x%): : �Draw_AddWord(y%)
z( � (!(�+112)+x%)>>8,(!(�+116)+y%)>>8
{ �
|
}� �Draw(x,y)
~ � --------------------
 � Line to (x,y)
� �
� � 3 words ( x 4 bytes)
� � --------------------
� � _path% : _path%=!(�+4)
�C � �CurrentPath=0    � � 1,"Paths must begin with 'PathBegin()"
�L � �CurrentSubpath=0 � � 0,"Subpaths must begin with a Move before Draw"
� �Draw_AddWord(8)
� �Draw_AddCoords(x,y)
�8 � (!(�+112)+�Draw_X(x))>>8,(!(�+116)+�Draw_Y(y))>>8
� !(�CurrentPath)=�
��
�
�� �DRAW(x%,y%)
� � --------------------
� � Line to (x,y)
� �
� � 3 words ( x 4 bytes)
� � --------------------
� � _path% : _path%=!(�+4)
�C � �CurrentPath=0    � � 1,"Paths must begin with 'PathBegin()"
�L � �CurrentSubpath=0 � � 0,"Subpaths must begin with a Move before Draw"
� �Draw_AddWord(8)
�* �Draw_AddWord(x%) : �Draw_AddWord(y%)
�( � (!(�+112)+x%)>>8,(!(�+116)+y%)>>8
� !(�CurrentPath)=�
��
�
�
�� �Bezier(a,b,c,d,x,y)
�: � ---------------------------------------------------
�; � Bezier curve passing through current point and (x,y)
�* � with control points (a,b) and (c,d)
� �
� � 7 words ( x 4 bytes)
�: � ---------------------------------------------------
�% � _path%,_store% : _path%=!(�+4)
�B � �CurrentPath=0    � � 1,"Can't Draw Bezier if No PathBegun"
�K � �CurrentSubpath=0 � � 0,"Subpath must start with Move before Bezier"
�9 _path%=!� : _path%-=12 : _store%=!_path% : !_path%=2
�   �Draw_AddWord(6)
�   �Draw_AddCoords(a,b)
�   �Draw_AddCoords(c,d)
�   �Draw_AddCoords(x,y)
�   �Draw_AddWord(0)
�   !�-=4
�*   ș "Draw_Stroke",_path%,,�DrawTrans
�   !_path%=_store%
�   !(�CurrentPath)=�
�:   � (!(�+112)+�Draw_X(x))>>8,(!(�+116)+�Draw_Y(y))>>8
� �
�
�� �CloseWithLine
�( � ---------------------------------
�( � Close current subpath with a line
� �
�
 � 1 word
�( � ---------------------------------
�B �  �CurrentPath=0 � � 1,"Can't closewithline if No PathBegun"
�D �  �CurrentSubpath=0 � � 0,"Can't closewithline without a Move"
� � _x%,_y%
�3 _x%=!�CurrentSubpath: _y%=!(�CurrentSubpath+4)
�* � (!(�+112)+_x%)>>8,(!(�+116)+_y%)>>8
� �Draw_AddWord(5)
� �
�
�� =====================
�� 2.3 Polar Coordinates
�� =====================
�
�� �DrawPolar(r,theta)
�) � ----------------------------------
�- � Move to x,y starting new subDraw_Path%
�' � This DOES affect winding numbers
�' � so Draw_Path% is filled normally
� �
� � 3 words ( x 4 bytes)
�) � ----------------------------------
� �Draw(r*�theta,r*�theta)
� �
�
�� �MovePolar(r,theta)
�) � ----------------------------------
�- � Move to x,y starting new subDraw_Path%
�' � This DOES affect winding numbers
�' � so Draw_Path% is filled normally
� �
� � 3 words ( x 4 bytes)
�) � ----------------------------------
� �Move(r*�theta,r*�theta)
� �
�
�� �Modulus(x,y)=�(x*x+y*y)
�
�� �Argument(y,x)
�� _argument
�
Ȏ � �
� � x=0 : _argument=(�/2)*�y
� � x>0 : _argument=�(y/x)
� � x<0 : _argument=�+�(y/x)
��
�=_argument
�
�
�

00000000  0d 00 01 20 f4 20 3e 44  72 61 77 42 61 73 69 63  |... . >DrawBasic|
00000010  3a 52 65 73 6f 75 72 63  65 73 2e 50 61 74 68 73  |:Resources.Paths|
00000020  0d 00 02 04 0d 00 03 3d  f4 20 3d 3d 3d 3d 3d 3d  |.......=. ======|
00000030  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  |================|
*
00000060  3d 0d 00 04 05 f4 0d 00  05 24 f4 20 63 6f 70 79  |=........$. copy|
00000070  72 69 67 68 74 20 4a 6f  65 20 54 61 79 6c 6f 72  |right Joe Taylor|
00000080  20 4a 75 6e 65 20 31 39  39 34 0d 00 06 05 f4 0d  | June 1994......|
00000090  00 07 3b f4 20 4e 2e 42  2e 20 46 6f 72 20 45 52  |..;. N.B. For ER|
000000a0  52 4f 52 20 54 48 52 4f  57 42 41 43 4b 20 74 6f  |ROR THROWBACK to|
000000b0  20 77 6f 72 6b 20 54 68  65 20 66 69 72 73 74 20  | work The first |
000000c0  6c 69 6e 65 20 61 62 6f  76 65 0d 00 08 37 f4 20  |line above...7. |
000000d0  20 20 20 20 20 4d 55 53  54 20 68 61 76 65 20 74  |     MUST have t|
000000e0  68 65 20 63 6f 72 72 65  63 74 20 70 61 74 68 6e  |he correct pathn|
000000f0  61 6d 65 20 6f 66 20 74  68 69 73 20 66 69 6c 65  |ame of this file|
00000100  2e 0d 00 09 3b f4 20 20  20 20 20 20 49 66 20 79  |....;.      If y|
00000110  6f 75 20 6d 6f 76 65 20  74 68 65 20 6c 6f 63 61  |ou move the loca|
00000120  74 69 6f 6e 20 6f 66 20  74 68 65 20 66 69 6c 65  |tion of the file|
00000130  20 72 65 6d 65 6d 62 65  72 20 74 6f 0d 00 0a 1f  | remember to....|
00000140  f4 20 20 20 20 20 20 61  6c 74 65 72 20 74 68 69  |.      alter thi|
00000150  73 20 70 61 74 68 6e 61  6d 65 2e 0d 00 0b 05 f4  |s pathname......|
00000160  0d 00 0c 3d f4 20 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  |...=. ==========|
00000170  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  |================|
*
00000190  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 0d 00 0d  |=============...|
000001a0  04 0d 00 0e 47 f4 20 2a  2a 2a 2a 2a 2a 2a 2a 2a  |....G. *********|
000001b0  2a 2a 2a 2a 2a 2a 2a 2a  2a 2a 2a 2a 2a 2a 2a 2a  |****************|
*
000001e0  2a 2a 2a 2a 2a 2a 2a 2a  0d 00 0f 05 f4 0d 00 10  |********........|
000001f0  0e f4 20 32 2e 20 50 61  74 68 73 0d 00 11 05 f4  |.. 2. Paths.....|
00000200  0d 00 12 47 f4 20 2a 2a  2a 2a 2a 2a 2a 2a 2a 2a  |...G. **********|
00000210  2a 2a 2a 2a 2a 2a 2a 2a  2a 2a 2a 2a 2a 2a 2a 2a  |****************|
*
00000240  2a 2a 2a 2a 2a 2a 2a 0d  00 13 04 0d 00 14 18 f4  |*******.........|
00000250  20 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  | ===============|
00000260  3d 3d 3d 0d 00 15 18 f4  20 32 2e 31 20 43 72 65  |===..... 2.1 Cre|
00000270  61 74 69 6e 67 20 50 61  74 68 73 0d 00 16 18 f4  |ating Paths.....|
00000280  20 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  | ===============|
00000290  3d 3d 3d 0d 00 17 04 0d  00 18 1a dd 20 a4 43 75  |===......... .Cu|
000002a0  72 72 65 6e 74 50 61 74  68 3d 21 28 93 2b 36 34  |rrentPath=!(.+64|
000002b0  29 0d 00 19 04 0d 00 1a  19 dd 20 f2 43 75 72 72  |)......... .Curr|
000002c0  65 6e 74 50 61 74 68 28  70 61 74 68 25 29 0d 00  |entPath(path%)..|
000002d0  1b 11 21 28 93 2b 36 34  29 3d 70 61 74 68 25 0d  |..!(.+64)=path%.|
000002e0  00 1c 05 e1 0d 00 1d 04  0d 00 1e 1d dd 20 a4 43  |............. .C|
000002f0  75 72 72 65 6e 74 53 75  62 70 61 74 68 3d 21 28  |urrentSubpath=!(|
00000300  93 2b 36 38 29 0d 00 1f  04 0d 00 20 1c dd 20 f2  |.+68)...... .. .|
00000310  43 75 72 72 65 6e 74 53  75 62 70 61 74 68 28 70  |CurrentSubpath(p|
00000320  61 74 68 25 29 0d 00 21  11 21 28 93 2b 36 38 29  |ath%)..!.!(.+68)|
00000330  3d 70 61 74 68 25 0d 00  22 05 e1 0d 00 23 04 0d  |=path%.."....#..|
00000340  00 24 18 dd 20 f2 50 61  74 68 42 65 67 69 6e 28  |.$.. .PathBegin(|
00000350  f8 20 70 61 74 68 29 0d  00 25 24 20 f4 20 2d 2d  |. path)..%$ . --|
00000360  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
00000370  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 0d 00 26 06 20  |-----------..&. |
00000380  f4 0d 00 27 1a 20 f4 20  43 72 65 61 74 65 73 20  |...'. . Creates |
00000390  70 61 74 68 20 68 65 61  64 65 72 0d 00 28 18 20  |path header..(. |
000003a0  f4 20 72 65 71 75 69 72  65 73 20 34 30 20 62 79  |. requires 40 by|
000003b0  74 65 73 0d 00 29 06 20  f4 0d 00 2a 24 20 f4 20  |tes..). ...*$ . |
000003c0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
000003d0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 0d 00 2b  |-------------..+|
000003e0  49 20 e7 20 a4 43 75 72  72 65 6e 74 50 61 74 68  |I . .CurrentPath|
000003f0  3c 3e 30 20 8c 20 85 20  30 2c 22 43 61 6e 27 74  |<>0 . . 0,"Can't|
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*
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00001490  29 29 3e 3e 38 0d 00 b1  06 20 e1 0d 00 b2 04 0d  |))>>8.... ......|
000014a0  00 b3 14 dd 20 f2 43 6c  6f 73 65 57 69 74 68 4c  |.... .CloseWithL|
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000014e0  f4 20 43 6c 6f 73 65 20  63 75 72 72 65 6e 74 20  |. Close current |
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00001620  28 93 2b 31 31 36 29 2b  5f 79 25 29 3e 3e 38 0d  |(.+116)+_y%)>>8.|
00001630  00 be 15 20 f2 44 72 61  77 5f 41 64 64 57 6f 72  |... .Draw_AddWor|
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00001650  c1 1b f4 20 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 3d  |... ============|
00001660  3d 3d 3d 3d 3d 3d 3d 3d  3d 0d 00 c2 1b f4 20 32  |=========..... 2|
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00001680  61 74 65 73 0d 00 c3 1b  f4 20 3d 3d 3d 3d 3d 3d  |ates..... ======|
00001690  3d 3d 3d 3d 3d 3d 3d 3d  3d 3d 3d 3d 3d 3d 3d 0d  |===============.|
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000016c0  20 f4 20 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  | . -------------|
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00001730  67 20 6e 75 6d 62 65 72  73 0d 00 c9 27 20 f4 20  |g numbers...' . |
00001740  73 6f 20 44 72 61 77 5f  50 61 74 68 25 20 69 73  |so Draw_Path% is|
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00001760  0d 00 ca 06 20 f4 0d 00  cb 1b 20 f4 20 33 20 77  |.... ..... . 3 w|
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000017a0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 0d 00 cd 1d 20 f2  |----------.... .|
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000017d0  04 0d 00 d0 19 dd 20 f2  4d 6f 76 65 50 6f 6c 61  |...... .MovePola|
000017e0  72 28 72 2c 74 68 65 74  61 29 0d 00 d1 29 20 f4  |r(r,theta)...) .|
000017f0  20 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  | ---------------|
00001800  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
00001810  2d 2d 2d 0d 00 d2 2d 20  f4 20 4d 6f 76 65 20 74  |---...- . Move t|
00001820  6f 20 78 2c 79 20 73 74  61 72 74 69 6e 67 20 6e  |o x,y starting n|
00001830  65 77 20 73 75 62 44 72  61 77 5f 50 61 74 68 25  |ew subDraw_Path%|
00001840  0d 00 d3 27 20 f4 20 54  68 69 73 20 44 4f 45 53  |...' . This DOES|
00001850  20 61 66 66 65 63 74 20  77 69 6e 64 69 6e 67 20  | affect winding |
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00001880  69 6c 6c 65 64 20 6e 6f  72 6d 61 6c 6c 79 0d 00  |illed normally..|
00001890  d5 06 20 f4 0d 00 d6 1b  20 f4 20 33 20 77 6f 72  |.. ..... . 3 wor|
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000018c0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
000018d0  2d 2d 2d 2d 2d 2d 2d 2d  0d 00 d8 1d 20 f2 4d 6f  |--------.... .Mo|
000018e0  76 65 28 72 2a 9b 74 68  65 74 61 2c 72 2a b5 74  |ve(r*.theta,r*.t|
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00001900  00 db 1e dd 20 a4 4d 6f  64 75 6c 75 73 28 78 2c  |.... .Modulus(x,|
00001910  79 29 3d b6 28 78 2a 78  2b 79 2a 79 29 0d 00 dc  |y)=.(x*x+y*y)...|
00001920  04 0d 00 dd 14 dd 20 a4  41 72 67 75 6d 65 6e 74  |...... .Argument|
00001930  28 79 2c 78 29 0d 00 de  0f ea 20 5f 61 72 67 75  |(y,x)..... _argu|
00001940  6d 65 6e 74 0d 00 df 0a  c8 8e 20 b9 20 ca 0d 00  |ment...... . ...|
00001950  e0 1f 20 c9 20 78 3d 30  20 3a 20 5f 61 72 67 75  |.. . x=0 : _argu|
00001960  6d 65 6e 74 3d 28 af 2f  32 29 2a b4 79 0d 00 e1  |ment=(./2)*.y...|
00001970  1d 20 c9 20 78 3e 30 20  3a 20 5f 61 72 67 75 6d  |. . x>0 : _argum|
00001980  65 6e 74 3d 99 28 79 2f  78 29 0d 00 e2 1f 20 c9  |ent=.(y/x).... .|
00001990  20 78 3c 30 20 3a 20 5f  61 72 67 75 6d 65 6e 74  | x<0 : _argument|
000019a0  3d af 2b 99 28 79 2f 78  29 0d 00 e3 05 cb 0d 00  |=.+.(y/x).......|
000019b0  e4 0e 3d 5f 61 72 67 75  6d 65 6e 74 0d 00 e5 04  |..=_argument....|
000019c0  0d 00 e6 04 0d ff                                 |......|
000019c6

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