Working on a simple desktop-based PICO-8 IDE for Windows/Linux/MacOS. Features: syntax highlighting, code overview, reads/writes the P8 file format, copy/paste sprites directly to system clipboard for easy interop, large map editor.
What other features would you enjoy in a desktop IDE?
3 comments
This is a short snippet showing how the water reflection effect is implemented in Pilot8.
Here is the code:
local g_rnd=nil
local g_clk=0
function _init()
init_rnd()
end
function init_rnd()
g_rnd={}
for i=1,64 do
add(g_rnd,flr(rnd(32)))
end
end
function _update()
g_clk+=1
end
function render_water(water_y)
local addr_w=0x6000+64*water_y
local addr_r=addr_w
local rip_c=0x11
memset(addr_w,rip_c,64)
for y=water_y+1,127 do
addr_w+=64
addr_r-=(y%2)*64
local offset=1+(flr(g_clk/4)+y)%#g_rnd
local prand=g_rnd[offset]
if 0~=band(prand,30) then
memcpy(addr_w,addr_r+prand%2*64,64)
else
memset(addr_w,rip_c,64)
end
end
end
function _draw()
cls(0)
map(0,0)
print("pilot8 water effect",
band(g_clk,127),88,7)
render_water(96)
end
|
Quick summary: I pre-generate some pseudo-random numbers on _init() because I want to use the same sequence every frame, shifted by the clock (to give continuity to the water animation, rather than make it random at every frame). Then, in render_water(), it's just a matter of starting at the water horizon line (water_y) and copying rows from above water to the area below the water line, one by one. Except that I move the "read" position only once every 2 frames to make the reflection "stretched", and use the pseudo-random number to vary the read position to get the "wavy" effect. Also, once in while, instead of drawing the reflection I draw a solid blue ripple line.
Feel free to reuse this code in any way you like!
UPDATE: Version 1.1:
- faster ship
- constant enemy spawns (no delays)
- muzzle flash effect and better explosions
- other gameplay tweaks
STORY: Welcome, Pilot 8. You are our top choice for this mission. I mean, 8th choice. Nothing suspicious at all happened to the other 7 pilots that came before you. They... uh... retired. Anyway, here is your comprehensive battle training: use the arrows to move, press [Z] to shoot. End of comprehensive training. Off to war you go. Good luck, Pilot 8.... Ok, that pilot is hopeless, let's start training Pilot 9. Oh, what? It's still on? How do I turn this off <click>
This is a simple space shooter.
- 18 levels across 6 worlds (Flood City, Oasis, Marshes, Coast, Canals, Fortress)
- Different weapons and powerups (shield, weapons, etc).
- Collect chips dropped by enemies to upgrade your ship. 14 upgrades available:
- extra speed
- rapid fire (3 levels)
- ammo capacity (3 levels)
- shield (3 levels)
- starting laser
- powerup frequency
- World map
Tech aspects:
- Dynamic lighting (via framebuffer post-processing).
- Screen-space reflection (water effect, lightning, etc).
- Particle effects, rain, etc.
