prog8/examples/balls.p8

98 lines
2.6 KiB
Lua

%import textio
%zeropage basicsafe
; Note: this program is compatible with C64 and CX16.
main {
sub start() {
str input = ".........."
ubyte ballCount
ubyte[255] BX
ubyte[255] BY
ubyte[255] BC
ubyte[255] DX
ubyte[255] DY
txt.print("number of balls (1-255)? ")
void txt.input_chars(input)
ballCount = conv.str2ubyte(input)
txt.fill_screen(81, 0)
; Setup Starting Ball Positions
ubyte lp
for lp in 0 to ballCount-1 {
BX[lp] = rnd() % txt.DEFAULT_WIDTH
BY[lp] = rnd() % txt.DEFAULT_HEIGHT
BC[lp] = rnd() & 15
DX[lp] = rnd() & 1
DY[lp] = rnd() & 1
void rnd()
}
; start clock
c64.SETTIM(0,0,0)
; display balls
uword frame
for frame in 0 to 999 {
; Loop though all balls clearing current spot and setting new spot
for lp in 0 to ballCount-1 {
; Clear existing Location the ball is at
txt.setclr(BX[lp], BY[lp], 0)
if DX[lp] == 0 {
if (BX[lp] == 0)
{
DX[lp] = 1
} else {
BX[lp]=BX[lp]-1
}
} else if DX[lp] == 1 {
if (BX[lp] == txt.DEFAULT_WIDTH-1)
{
BX[lp] = txt.DEFAULT_WIDTH-2
DX[lp] = 0
} else {
BX[lp]=BX[lp]+1
}
}
if DY[lp] == 0 {
if (BY[lp] == 0)
{
DY[lp] = 1
} else {
BY[lp]=BY[lp]-1
}
} else if DY[lp] == 1 {
if (BY[lp] == txt.DEFAULT_HEIGHT-1)
{
BY[lp] = txt.DEFAULT_HEIGHT-2
DY[lp] = 0
} else {
BY[lp]=BY[lp]+1
}
}
; Put the new ball possition
txt.setclr(BX[lp], BY[lp], BC[lp])
}
;txt.plot(0,0)
;txt.print_uw(frame)
}
; read clock
uword jiffies
%asm {{
jsr c64.RDTIM
sta jiffies
stx jiffies+1
}}
txt.print("\nbenchmark: ")
txt.print_uw(jiffies)
txt.print(" jiffies for 1000 frames.\n")
}
}