mirror of
https://github.com/irmen/prog8.git
synced 2024-12-29 04:29:19 +00:00
128 lines
2.7 KiB
Lua
128 lines
2.7 KiB
Lua
%import gfx2
|
|
%import palette
|
|
%import textio
|
|
|
|
|
|
; TODO WORK IN PROGRESS...
|
|
; want to make Amiga 'copper' bars color cycling effects
|
|
|
|
|
|
main {
|
|
sub start() {
|
|
palette.set_all_black()
|
|
gfx2.screen_mode(4)
|
|
|
|
ubyte yy
|
|
for yy in 0 to 239
|
|
gfx2.horizontal_line(0, yy, 320, yy & 63)
|
|
|
|
repeat {
|
|
colors.random_bar()
|
|
colors.set_palette()
|
|
repeat 20
|
|
sys.waitvsync()
|
|
}
|
|
|
|
repeat {
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
colors {
|
|
ubyte cr
|
|
ubyte cg
|
|
ubyte cb
|
|
ubyte[48+16] reds
|
|
ubyte[48+16] greens
|
|
ubyte[48+16] blues
|
|
ubyte bar_size
|
|
|
|
sub random_rgb12() {
|
|
do {
|
|
uword rr = rndw()
|
|
cr = msb(rr) & 15
|
|
cg = lsb(rr)
|
|
cb = cg & 15
|
|
cg >>= 4
|
|
} until cr+cg+cb >= 12
|
|
}
|
|
|
|
sub random_bar() {
|
|
; fade black -> color then fade color -> white
|
|
random_rgb12()
|
|
ubyte r=0
|
|
ubyte g=0
|
|
ubyte b=0
|
|
ubyte different
|
|
bar_size = 0
|
|
|
|
repeat {
|
|
different = false
|
|
if r != cr {
|
|
different = true
|
|
r++
|
|
}
|
|
if g != cg {
|
|
different = true
|
|
g++
|
|
}
|
|
if b != cb {
|
|
different = true
|
|
b++
|
|
}
|
|
if not different
|
|
break
|
|
reds[bar_size] = r
|
|
greens[bar_size] = g
|
|
blues[bar_size] = b
|
|
bar_size++
|
|
}
|
|
repeat {
|
|
different = false
|
|
if r != 15 {
|
|
different = true
|
|
r++
|
|
}
|
|
if g != 15 {
|
|
different = true
|
|
g++
|
|
}
|
|
if b != 15 {
|
|
different = true
|
|
b++
|
|
}
|
|
if not different
|
|
break
|
|
reds[bar_size] = r
|
|
greens[bar_size] = g
|
|
blues[bar_size] = b
|
|
bar_size++
|
|
}
|
|
; mirror bottom half from top half
|
|
ubyte mi = bar_size-1
|
|
repeat mi {
|
|
reds[bar_size] = reds[mi]
|
|
greens[bar_size] = greens[mi]
|
|
blues[bar_size] = blues[mi]
|
|
bar_size++
|
|
mi--
|
|
}
|
|
; make rest of bar black (bars are not always the same length using the simplistic algorithm above...)
|
|
while bar_size != 48+16 {
|
|
reds[bar_size] = $0
|
|
greens[bar_size] = $0
|
|
blues[bar_size] = $0
|
|
bar_size++
|
|
}
|
|
}
|
|
|
|
sub set_palette() {
|
|
ubyte ix
|
|
for ix in 0 to 48+15 {
|
|
uword color = mkword(reds[ix], (greens[ix] << 4) | blues[ix] )
|
|
palette.set_color(ix, color)
|
|
}
|
|
}
|
|
}
|