Difference between revisions of "ParticleSystem:emit"

(Created page)
 
m (Woops)
 
(4 intermediate revisions by 2 users not shown)
Line 7: Line 7:
 
</source>
 
</source>
 
=== Arguments ===
 
=== Arguments ===
{{param|number|numparticles|The amount of particles to emit. The number of emitted particles will be truncated if the particle system's max buffer size is reached.}}
+
{{param|number|numparticles|The amount of particles to emit. The number of emitted particles will be truncated if the particle system's max [[ParticleSystem:getBufferSize|buffer size]] is reached.}}
 
=== Returns ===
 
=== Returns ===
 
Nothing.
 
Nothing.
 +
 +
== Examples ==
 +
=== Spawn a bunch of particles ===
 +
This example will create a burst of particles when the spacebar is pressed. You can use the [[:File:Love-game-logo-256x256.png|löve logo]] as an example image.
 +
<source lang="lua">
 +
function love.load()
 +
local img = love.graphics.newImage('logo.png')
 +
 +
psystem = love.graphics.newParticleSystem(img, 32)
 +
psystem:setParticleLifetime(2, 5) -- Particles live at least 2s and at most 5s.
 +
psystem:setLinearAcceleration(-5, -5, 50, 100) -- Randomized movement towards the bottom of the screen.
 +
psystem:setColors(255, 255, 255, 255, 255, 255, 255, 0) -- Fade to black.
 +
end
 +
 +
function love.draw()
 +
-- Draw the particle system at the center of the game window.
 +
love.graphics.draw(psystem, love.graphics.getWidth() * 0.5, love.graphics.getHeight() * 0.5)
 +
end
 +
 +
function love.update(dt)
 +
psystem:update(dt)
 +
end
 +
 +
function love.keypressed(key)
 +
if key == 'space' then
 +
psystem:emit(32)
 +
end
 +
end
 +
</source>
 +
 
== See Also ==
 
== See Also ==
 
* [[parent::ParticleSystem]]
 
* [[parent::ParticleSystem]]
 
[[Category:Functions]]
 
[[Category:Functions]]
 
{{#set:Description=Emits a burst of particles from the particle emitter.}}
 
{{#set:Description=Emits a burst of particles from the particle emitter.}}
 +
 
== Other Languages ==
 
== Other Languages ==
 
{{i18n|ParticleSystem:emit}}
 
{{i18n|ParticleSystem:emit}}

Latest revision as of 12:41, 2 October 2016

Available since LÖVE 0.9.0
This function is not supported in earlier versions.

Emits a burst of particles from the particle emitter.

Function

Synopsis

ParticleSystem:emit( numparticles )

Arguments

number numparticles
The amount of particles to emit. The number of emitted particles will be truncated if the particle system's max buffer size is reached.

Returns

Nothing.

Examples

Spawn a bunch of particles

This example will create a burst of particles when the spacebar is pressed. You can use the löve logo as an example image.

function love.load()
	local img = love.graphics.newImage('logo.png')

	psystem = love.graphics.newParticleSystem(img, 32)
	psystem:setParticleLifetime(2, 5) -- Particles live at least 2s and at most 5s.
	psystem:setLinearAcceleration(-5, -5, 50, 100) -- Randomized movement towards the bottom of the screen.
	psystem:setColors(255, 255, 255, 255, 255, 255, 255, 0) -- Fade to black.
end

function love.draw()
	-- Draw the particle system at the center of the game window.
	love.graphics.draw(psystem, love.graphics.getWidth() * 0.5, love.graphics.getHeight() * 0.5)
end

function love.update(dt)
	psystem:update(dt)
end

function love.keypressed(key)
	if key == 'space' then
		psystem:emit(32)
	end
end

See Also


Other Languages