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Topic: Bluey (Read 181 times) |
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David Williams
Developer
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meh
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Posts: 452
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Bluey
« Thread started on: Dec 28th, 2017, 3:57pm » |
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Code:
REM Bluey
REM Works with BB4W & BBCSDL
REM Relatively low CPU usage
ON ERROR PROCerror
WinW% = 360
WinH% = 640
VDU 23, 22, WinW%; WinH%; 8, 16, 16, 0 : OFF
PRINT "Please wait..."
REM Create a 256-colour (8 bits-per-pixel) bitmap to render graphics on:
bmpSz% = 54 + 4*256 + WinW%*WinH% + 2
DIM bmp% bmpSz%+6
bmp% = ((bmp% + 3) AND -4) + 2
bmp%?0 = ASC"B"
bmp%?1 = ASC"M"
bmp%!2 = bmpSz%
bmp%!10 = 1078
bmp%!14 = 40
bmp%!18 = WinW%
bmp%!22 = WinH%
bmp%?26 = 1
bmp%?28 = 8
bmp%!34 = WinW%*WinH%
bmp$ = STR$~bmp%
REM Set up colour palette:
FOR I% = 0 TO 255
r& = 0.125 * I%
g& = 0.25 * I%
b% = 1.5 * I%
IF b% > 255 b% = 255
bmp%!(54 + 4*I%) = b% + (g&<<8) + (r&<<16)
NEXT I%
REM Generate pattern:
A% = bmp% + 1078
W% = WinW% - 1
H% = WinH% - 1
FOR Y% = 0 TO WinH%-1
a = Y%/H%
FOR X% = 0 TO WinW%-1
b = X%/W%
A%?(Y%*360+X%) = 255*(SIN(2*PI*a-5*PI*SQRb+3*PI*a^2) + COS(3*PI*b+9*PI*SQRa-2*PI*b^2))
NEXT
NEXT
A% = bmp% + 54
B% = A% + 1024
REPEAT
OSCLI "MDISPLAY " + bmp$
T% = !A%
FOR I% = A% TO B%-5 STEP 4
!I% = !(I%+4)
NEXT
!(B%-4) = T%
WAIT 1
UNTIL FALSE
END
DEF PROCerror
IF ERR=17 AND INKEY$(-256)<>"W" THEN CHAIN @lib$+"../examples/tools/touchide"
OSCLI "REFRESH ON" : CLS : ON : SOUND 1, -15, 200, 3
COLOUR 15, 255, 255, 255 : COLOUR 15
PRINT '" " + REPORT$ + " at line " + STR$ERL
COLOUR 15, 200, 200, 200
PRINT ''" Closing in 3 seconds...";
WAIT 300
QUIT
ENDPROC
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michael
Senior Member
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Posts: 335
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Re: Bluey
« Reply #1 on: Dec 31st, 2017, 06:58am » |
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That is cool.
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I like making program generators and like reinventing the wheel
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David Williams
Developer
member is offline
meh
Gender:
Posts: 452
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Re: Bluey
« Reply #2 on: Dec 31st, 2017, 4:24pm » |
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on Dec 31st, 2017, 06:58am, michael wrote:
Here's a more sickly variation:
Code:
REM Tutti Fruity
REM Works with BB4W & BBCSDL
REM Relatively low CPU usage
ON ERROR PROCerror
WinW% = 360
WinH% = 640
VDU 23, 22, WinW%; WinH%; 8, 16, 16, 0 : OFF
PRINT "Please wait..."
REM Create a 256-colour (8 bits-per-pixel) bitmap to render graphics on:
bmpSz% = 54 + 4*256 + WinW%*WinH% + 2
DIM bmp% bmpSz%+6
bmp% = ((bmp% + 3) AND -4) + 2
bmp%?0 = ASC"B"
bmp%?1 = ASC"M"
bmp%!2 = bmpSz%
bmp%!10 = 1078
bmp%!14 = 40
bmp%!18 = WinW%
bmp%!22 = WinH%
bmp%?26 = 1
bmp%?28 = 8
bmp%!34 = WinW%*WinH%
bmp$ = STR$~bmp%
REM Set up colour palette:
FOR I% = 0 TO 255
k = PI*I%/255
r& = 128 + 127*SIN(k)
g& = 128 + 127*COS(2*k)
b% = 128 + 127*SIN(4*k)
IF b% > 255 b% = 255
bmp%!(54 + 4*I%) = b% + (g&<<8) + (r&<<16)
NEXT I%
REM Generate pattern:
A% = bmp% + 1078
W% = WinW% - 1
H% = WinH% - 1
FOR Y% = 0 TO WinH%-1
a = Y%/H%
FOR X% = 0 TO WinW%-1
b = X%/W%
A%?(Y%*360+X%) = 255*(SIN(PI*a-3*PI*b+5*PI*a^3) + COS(2*PI*b+3*PI*a-4*PI*b^4))
NEXT
NEXT
A% = bmp% + 54
B% = A% + 1024
REPEAT
OSCLI "MDISPLAY " + bmp$
T% = !A%
FOR I% = A% TO B%-5 STEP 4
!I% = !(I%+4)
NEXT
!(B%-4) = T%
WAIT 1
UNTIL FALSE
END
DEF PROCerror
IF ERR=17 AND INKEY$(-256)<>"W" THEN CHAIN @lib$+"../examples/tools/touchide"
OSCLI "REFRESH ON" : CLS : ON : SOUND 1, -15, 200, 3
COLOUR 15, 255, 255, 255 : COLOUR 15
PRINT '" " + REPORT$ + " at line " + STR$ERL
COLOUR 15, 200, 200, 200
PRINT ''" Closing in 3 seconds...";
WAIT 300
QUIT
ENDPROC
I can't see an obvious way of making the colour-cycling 'frame-rate independent' so that it runs at the same speed across a wide range of devices.
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