pico8-moonbus/moonbus.p8

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pico-8 cartridge // http://www.pico-8.com
version 42
__lua__
-- MoonBus
-- by Dejvino
plr_alive=true
plr_win=false
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plr_docked=false
plr_pos={x=5,y=8}
plr_speed={x=0.5,y=0}
plr_static=false
plr_engine=-1
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telem_spd={}
gravity=0.02
engine_power=0.2
land_speed_limit=1
maph=8
cam={}
function _update()
debug_points={}
-- controlls
plr_engine=-1
if plr_alive then
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if not plr_docked then
if btn(⬆️) then plr_engine=⬆️ end
if btn(⬇️) then plr_engine=⬇️ end
if btn(⬅️) then plr_engine=⬅️ end
if btn(➡️) then plr_engine=➡️ end
end
if plr_docked and btn(❎) then
plr_docked=false
plr_static=false
plr_engine=⬆️
plr_speed={x=0,y=0.5}
end
end
-- engine
if plr_engine==⬆️ then
plr_speed.y+=engine_power
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elseif plr_engine==⬇️ then
plr_speed.y-=engine_power
elseif plr_engine==⬅️ then
plr_speed.x-=engine_power
elseif plr_engine==➡️ then
plr_speed.x+=engine_power
end
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if plr_engine != -1 then
sfx(2,2)
else
sfx(-1,2)
end
-- move objects
move(plr_pos,plr_speed,0.1)
-- gravity pull
if not plr_static then
plr_speed.y-=gravity
end
-- crash detection
local pc=plus(plr_pos,{x=0.5,y=-0.5})
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if pc.y <= maph and not plr_static then
for p in all({plus(pc,clearx(unit(plr_speed,0.4))), plus(pc,cleary(unit(plr_speed,0.4)))}) do
local pmaps=mget(p.x,maph-p.y)
local target=fget(pmaps,7)
local solid=fget(pmaps,0)
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if plr_win != true and target and dist(plr_speed) < land_speed_limit and p.y < pc.y then
plr_win=true
plr_speed={x=0,y=0}
plr_pos={x=flr(plr_pos.x+0.5),y=flr(plr_pos.y+0.5)}
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plr_docked=true
plr_static=true
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sfx(1)
break
elseif solid or plr_pos.y<=0 then
plr_speed.y*=-0.75
plr_alive=false
if (dist(plr_speed) > 1) then
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sfx(0)
else
plr_speed.x=0
plr_speed.y=0
plr_static=true
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sfx(3)
end
break
end
end
end
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if plr_alive then
telem_spd=mul(plr_speed,1)
end
cam={x=plr_pos.x*8-60, y=0}
end
function _draw()
cls()
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camera(cam.x,cam.y)
map(0, 0, 0, 128-maph*8)
local px,py=to_scrn(plr_pos)
local img=0
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if plr_docked then
img=5
elseif not plr_alive then
img=4
elseif plr_engine==⬆️ then
img=2
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elseif plr_engine==⬇️ then
img=2
elseif plr_engine==⬅️ then
img=3
elseif plr_engine==➡️ then
img=1
end
spr(img,px,py)
for p in all(debug_points) do
local px,py=to_scrn(p)
pset(px,py,8)
end
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-- HUD
camera(0,0)
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-- telemetry
local cr=10
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local cp={x=127-cr,y=cr}
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local spd={x=limit(telem_spd.x,1),y=limit(telem_spd.y,1)}
circ(cp.x,cp.y,cr,3)
line(cp.x,cp.y,cp.x+spd.x*cr,cp.y,11)
line(cp.x,cp.y,cp.x,cp.y-spd.y*cr,11)
circ(cp.x+spd.x*cr,cp.y-spd.y*cr,1,dist(telem_spd)<land_speed_limit and 3 or 8)
if not plr_alive then
line(cp.x+(-0.3*cr),cp.y+(-0.6*cr),cp.x,cp.y,5)
line(cp.x+(-0.7*cr),cp.y+(-0.3*cr),cp.x,cp.y,5)
line(cp.x,cp.y,cp.x+0.6*cr,cp.y+0.3*cr,5)
line(cp.x+0.6*cr,cp.y+0.3*cr,cp.x+0.2*cr,cp.y+0.8*cr,5)
end
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if plr_alive then
if plr_docked then
print("press ❎ to undock.", 36,60,11)
else
print("land gently to dock.", 0,0,3)
end
else
print("oops! you crashed.", 0,0,8)
end
end
function to_scrn(p)
local x=p.x*8
local y=128-p.y*8
return x,y
end
function move(p,d,a)
a=a or 1
p.x+=d.x*a
p.y+=d.y*a
end
function plus(p,d,a)
a=a or 1
return {
x=p.x+d.x*a,
y=p.y+d.y*a
}
end
function clearx(p)
return {
x=0,
y=p.y
}
end
function cleary(p)
return {
x=p.x,
y=0
}
end
function mul(p,a)
return {
x=p.x*a,
y=p.y*a
}
end
function neg(p)
return mul(p,-1)
end
function dist(p)
return abs(p.x) + abs(p.y)
end
function unit(p,u)
u=u or 1
local x = 0
local y = 0
if p.x>0 then x=u end
if p.x<0 then x=-u end
if p.y>0 then y=u end
if p.y<0 then y=-u end
return {x=x,y=y}
end
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function limit(val,lim)
if (abs(val) > lim) then
return val*lim/abs(val)
end
return val
end
__gfx__
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__gff__
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__map__
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__sfx__
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