moonbus: particles

This commit is contained in:
Dejvino 2024-08-11 21:45:40 +02:00
parent 937bee80c8
commit 1f54a2f8f3

View File

@ -62,6 +62,8 @@ function load_level()
plr_pos=find_random_point_by_flag(1)
telem_spd={}
particles={}
next_target()
end
@ -128,6 +130,7 @@ function _update()
if plr_engine != -1 then
sfx(2,2)
plr_fuel=max(0,min(1,plr_fuel-fuel_cons))
generate_particle(plr_pos)
else
sfx(-1,2)
end
@ -157,6 +160,14 @@ function _update()
plr_speed.y-=gravity
end
-- particles
for i,part in pairs(particles) do
part.spd.y-=gravity/5
move(part.p,part.spd,0.1)
part.age=max(0,part.age)+1
if (part.age >= part.limit) then del(particles,part) end
end
-- crash detection
local pc=plus(plr_pos,{x=0.5,y=-0.5})
local crashed=false
@ -196,8 +207,10 @@ function _update()
plr_speed.x*=0.5
plr_alive=false
if (dist(plr_speed) > 1) then
for i=1,10 do generate_particle() end
sfx(0)
else
for i=1,20 do generate_particle() end
plr_speed.x=0
plr_speed.y=0
plr_static=true
@ -258,6 +271,14 @@ function _draw()
pset(px,py,8)
end
for part in all(particles) do
local p=part.p
local px,py=to_scrn(p)
--pset(px,py,ttl > 10 and 8 or 5)
circ(px,py,cos(part.age/20)*0.6+1.5,part.age < 10 and 8 or (part.age < part.limit/2 and 5 or 1))
end
print(#particles, 32,50,11)
-- target
if plr_alive then
local tg={x=plr_target.x,y=plr_target.y}
@ -384,6 +405,15 @@ function next_target()
plr_target={x=mp.x,y=maph-mp.y+1}
end
function generate_particle()
add(particles,{
p=plus(plus(plr_pos,{x=0.25,y=-0.85}),{x=rnd(),y=rnd()},0.5),
spd=plus(mul({x=rnd(2)-1,y=rnd(2)-1},0.1),mul(plr_speed,rnd(0.5))),
age=rnd(20),
limit=80+flr(rnd(40))
})
end
function to_scrn(p)
local x=p.x*8
local y=128-p.y*8
@ -415,6 +445,7 @@ function cleary(p)
}
end
function mul(p,a)
a=a or 1
return {
x=p.x*a,
y=p.y*a
@ -446,38 +477,38 @@ function limit(val,lim)
return val
end
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