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debug=false
pause=debug
skip_speed=50
start_time=0
t_offset=-5000
x_offset=-5
y_offset=-3
z_offset=-600
pan=0.075
zoom=0.025
function _init()
t=(start_time or 0)
mult=8.0
star_plane=0
cam={x=0,y=0,z=z_offset}
if (not debug)music(0)
t=step(t)
end
function _update60()
if btn(5) then
if btn(2) then
cam.z-=cam.z*zoom
elseif btn(3) then
cam.z+=cam.z*zoom
end
if pause then
if btnp(0) then
t=step(-1)
elseif btnp(1) then
t=step()
end
else
if btnp(0) then
t=step(-skip_speed)
elseif btnp(1) then
t=step(skip_speed)
end
end
else
if btn(0) then
cam.x+=cam.z*pan
elseif btn(1) then
cam.x-=cam.z*pan
elseif btn(2) then
cam.y+=cam.z*pan
elseif btn(3) then
cam.y-=cam.z*pan
end
if not pause then
t=step()
end
end
if (btnp(4)) then
pause=not pause
end
if (btn(0))btnl="⬅️" else btnl=""
if (btn(1))btnr="➡️" else btnr=""
if (btn(2))btnu="⬆️" else btnu=""
if (btn(3))btnd="⬇️" else btnd=""
if (btn(4))btnz="🅾️" else btnz=""
if (btn(5))btnx="" else btnx=""
end
function _draw()
cls()
for s in all(stars) do
draw_point(s)
end
color(11)
rect(0, 0, 127, 127)
print('t: '..t+t_offset,4,4)
print('x: '..flr(cam.x),4, 12)
print('y: '..-flr(cam.y),4,20)
print('z: '..(flr(cam.z)),4,28)
print(btnz,48,116)
print(btnx,48,116)
print(btnl,56,116)
print(btnr,70.5,116)
print(btnu,63.5,112)
print(btnd,63.5,120)
end
function step(m)
for s in all(stars) do
s.x+=s.vx*(m or 1)
s.y+=s.vy*(m or 1)
end
return increment(t,m)
end
function increment(n, amount)
n+=(amount or 1)
return n
end
function draw_point(p)
local x,y=project(p)
if cam.z>=-1 then
spr(star_sprite_color(),x,y)
else
pset(x,y,star_color())
end
end
function project(p)
local x=(p.x-cam.x+x_offset)*mult/(star_plane-cam.z)+127/2
local y=(p.y-cam.y+y_offset)*mult/(star_plane-cam.z)+127/2
return x, y
end
function star_color()
return shuffle_colors({7,7,7,7,7,0,1})
end
function star_sprite_color()
return shuffle_colors({2,2,2,2,3,3,4})
end
function shuffle_colors(colors)
local i=ceil(rnd(#colors))
return colors[i]
end
stars={
{x=9,y=-9999,vx= 0,vy= 2},{x=5007,y=0,vx=-1,vy= 0},{x=5003,y=-5002,vx=-1,vy= 1},{x=10006,y=5010,vx=-2,vy=-1},{x=-9998,y=-10004,vx= 2,vy= 2},{x=-10006,y=10010,vx= 2,vy=-2},{x=-4999,y=5008,vx= 1,vy=-1},{x=-4999,y=7,vx= 1,vy= 0},{x=-5003,y=10011,vx= 1,vy=-2},{x=5007,y=5006,vx=-1,vy=-1},{x=-5002,y=3,vx= 1,vy= 0},{x=-10004,y=3,vx= 2,vy= 0},{x=5010,y=-5003,vx=-1,vy= 1},{x=-4995,y=10011,vx= 1,vy=-2},{x=4,y=5007,vx= 0,vy=-1},{x=8,y=-5002,vx= 0,vy= 1},{x=10015,y=0,vx=-2,vy= 0},{x=-4999,y=6,vx= 1,vy= 0},{x=8,y=5009,vx= 0,vy=-1},{x=5003,y=-4997,vx=-1,vy= 1},{x=0,y=5005,vx= 0,vy=-1},{x=-10002,y=2,vx= 2,vy= 0},{x=-4995,y=-10002,vx= 1,vy= 2},{x=-9999,y=-4996,vx= 2,vy= 1},{x=-10002,y=10007,vx= 2,vy=-2},{x=5003,y=5006,vx=-1,vy=-1},{x=-4995,y=0,vx= 1,vy= 0},{x=-10006,y=0,vx= 2,vy= 0},{x=-4995,y=10009,vx= 1,vy=-2},{x=10014,y=7,vx=-2,vy= 0},{x=-10003,y=5006,vx= 2,vy=-1}
}
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