mirror of
https://github.com/forth-ev/VolksForth.git
synced 2024-09-07 04:54:30 +00:00
137 lines
8.7 KiB
Plaintext
137 lines
8.7 KiB
Plaintext
Screen 0 not modified
|
|
0 \\ documentation for dargon demo tcas20130106
|
|
1 start the dragon with : <pos int> DRAG
|
|
2 or with : <1 or -1> <pos int> DRAGON
|
|
3
|
|
4 DRAG clears the screen, defines the starting point and executes
|
|
5 DRAGON.
|
|
6 The variable STEPSIZE defines the size of steps between 1 and 3
|
|
7 (larger values will produce grabage)
|
|
8
|
|
9 odd numbers as input values do not work
|
|
10
|
|
11 DDEMO is a loop executing the DRAGON demo which can be stopped
|
|
12 with a keypress once the 2nd dragon is fully painted (it is
|
|
13 recommended to press a key a little in advance)
|
|
14
|
|
15
|
|
Screen 1 not modified
|
|
0 \ dragon-loadscreen cas20130106
|
|
1
|
|
2 Onlyforth
|
|
3
|
|
4 \needs Graphics include line_a.fb
|
|
5
|
|
6 Onlyforth GEM also Graphics also
|
|
7
|
|
8 decimal
|
|
9
|
|
10 1 5 +thru
|
|
11
|
|
12
|
|
13
|
|
14
|
|
15
|
|
Screen 2 not modified
|
|
0 \ dragon s.2 03oct86we
|
|
1
|
|
2 Variable angle
|
|
3 Variable stepsize 1 stepsize !
|
|
4 Variable color 1 color !
|
|
5 Variable xcood Variable ycood
|
|
6
|
|
7
|
|
8
|
|
9
|
|
10
|
|
11
|
|
12
|
|
13
|
|
14
|
|
15
|
|
Screen 3 not modified
|
|
0 \ set_pixel 03oct86we
|
|
1
|
|
2 Label ?step
|
|
3 stepsize pcrel) D2 move D1 tst 0<> IF D2 neg THEN rts
|
|
4
|
|
5 Code set_pixel
|
|
6 xcood pcrel) D3 move ycood pcrel) D4 move
|
|
7 angle pcrel) D0 move 1 # D0 asr D0 D1 move 1 D0 andi
|
|
8 1 # D1 asr 1 D1 andi
|
|
9 D0 tst 0= IF ?step bsr D2 D3 add D3 xcood R#) move THEN
|
|
10 D0 tst 0<> IF ?step bsr D2 D4 add D4 ycood R#) move THEN
|
|
11 D3 SP -) move D4 SP -) move color pcrel) SP -) move
|
|
12 ;c: put_pixel ;
|
|
13
|
|
14
|
|
15
|
|
Screen 4 not modified
|
|
0 \ dragon s.3 03oct86we
|
|
1
|
|
2 Code turn ( n -- )
|
|
3 angle pcrel) D0 move SP )+ D0 add D0 angle R#) move
|
|
4 Next end-code
|
|
5
|
|
6 : dragon recursive ( stepw rec_tiefe -- )
|
|
7 dup 0= IF 2drop set_pixel
|
|
8 ELSE
|
|
9 over turn
|
|
10 1 over 1- dragon
|
|
11 over 2* negate turn
|
|
12 -1 over 1- dragon
|
|
13 drop turn
|
|
14 THEN ;
|
|
15
|
|
Screen 5 not modified
|
|
0 \ dragon s.4 03oct86we
|
|
1
|
|
2 : drachen
|
|
3 2 stepsize !
|
|
4 100 xcood ! 200 ycood ! 1 14 dragon
|
|
5 101 xcood ! 200 ycood ! 1 14 dragon
|
|
6 100 xcood ! 201 ycood ! 1 14 dragon
|
|
7 101 xcood ! 201 ycood ! 1 14 dragon
|
|
8 1 stepsize ! ;
|
|
9
|
|
10 : schubs
|
|
11 100 0 DO I 112 over - 400 272 2over >r 1+ r> 1-
|
|
12 scr>scr LOOP ;
|
|
13
|
|
14
|
|
15
|
|
Screen 6 not modified
|
|
0 \ dragon s.5 03oct86we
|
|
1
|
|
2 : drag ( n -- ) page
|
|
3 angle off 100 xcood ! 200 ycood !
|
|
4 1 swap dragon ;
|
|
5
|
|
6 : ddemo
|
|
7 16 drag schubs
|
|
8 0 color ! 199 xcood ! 100 ycood ! 1 16 dragon
|
|
9 1 color ! drachen ;
|
|
10
|
|
11
|
|
12
|
|
13
|
|
14
|
|
15
|
|
Screen 7 not modified
|
|
0 \ 03oct86we
|
|
1
|
|
2
|
|
3
|
|
4
|
|
5
|
|
6
|
|
7
|
|
8
|
|
9
|
|
10
|
|
11
|
|
12
|
|
13
|
|
14
|
|
15
|