Achie72 · July 15, 2024 17:02
diff --git a/pico8-particles.p8 b/pico8-particles.p8
 -- inside init have a collection called particles
 particles = {}

 -- adder function, you call this anytime you want to add a new particle
 -- to the system
 function add_particle(_x, _y, _sx, _sy, _lifetime, _color, _type)
    -- create particle
    local part = {
        x = _x,
        y = _y,
        sx = _sx, --speed for the particle if they move around
        sy = _sy, -- same but y direction
        lifetime = _lifetime, -- how long it should live
        color = _color, -- color to draw
        type = _type -- type of it
    }
    add(particles, part)
 end

 -- in update
 -- update all particles
 for particle in all(particles) do
    particle.x += particle.sx -- move the x direction by the speed
    particle.y += particle.sy -- move the y direction by the speed
    particle.lifetime -= 1 -- decrement by 1 each frame
    -- if lifetime is over delete particle
    if particle.lifetime <= 0 then
        del(particles, particle)
    end
    --particle.color = flr(rnd(15))+1 -- this gonna generate a color between 1 and 15
    -- if particle.type == 1 then
        -- particle type 1 do something else
    -- end
  
    -- here for example you can have a type 1 that is just explosion clouds
    -- filled in circles
    -- and type 2, which is a shockwave, which is growing faster
 end

 -- in draw:
 -- draw the particles
 for part in all(particles) do
    --pset(part.x, part.y, part.color)
    -- part.type = 1 would be a circfill like this
    circfill(part.x, part.y, part.type, part.color)
    -- type 2 would be a a white circfill that expands
  
    -- how can you draw different things over time?
    -- calculating with lifetime is the easiest,
    -- for expanding stuff you want to increase the size
    -- so for example let's have a 10/lifetime for example, where
    -- tweaking 10 is where you can dial in the maximum size.
    -- here you divide 10 with a smaller and smaller number due to how
    -- lifetime is decreasing over time
    -- circfill(part.x, part.y, 10/part.lifetime, part.colo)
 end
	-- inside init have a collection called particles
	particles = {}

	-- adder function, you call this anytime you want to add a new particle
	-- to the system
	function add_particle(_x, _y, _sx, _sy, _lifetime, _color, _type)
	-- create particle
	local part = {
	x = _x,
	y = _y,
	sx = _sx, --speed for the particle if they move around
	sy = _sy, -- same but y direction
	lifetime = _lifetime, -- how long it should live
	color = _color, -- color to draw
	type = _type -- type of it
	}
	add(particles, part)
	end

	-- in update
	-- update all particles
	for particle in all(particles) do
	particle.x += particle.sx -- move the x direction by the speed
	particle.y += particle.sy -- move the y direction by the speed
	particle.lifetime -= 1 -- decrement by 1 each frame
	-- if lifetime is over delete particle
	if particle.lifetime <= 0 then
	del(particles, particle)
	end
	--particle.color = flr(rnd(15))+1 -- this gonna generate a color between 1 and 15
	-- if particle.type == 1 then
	-- particle type 1 do something else
	-- end

	-- here for example you can have a type 1 that is just explosion clouds
	-- filled in circles
	-- and type 2, which is a shockwave, which is growing faster
	end

	-- in draw:
	-- draw the particles
	for part in all(particles) do
	--pset(part.x, part.y, part.color)
	-- part.type = 1 would be a circfill like this
	circfill(part.x, part.y, part.type, part.color)
	-- type 2 would be a a white circfill that expands

	-- how can you draw different things over time?
	-- calculating with lifetime is the easiest,
	-- for expanding stuff you want to increase the size
	-- so for example let's have a 10/lifetime for example, where
	-- tweaking 10 is where you can dial in the maximum size.
	-- here you divide 10 with a smaller and smaller number due to how
	-- lifetime is decreasing over time
	-- circfill(part.x, part.y, 10/part.lifetime, part.colo)
	end