Difference between revisions of "ParticleSystem:emit"
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=== 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 [https://www.love2d.org/w/images/9/9b/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 == ' ' 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}} |
Revision as of 20:40, 6 January 2015
Available since LÖVE 0.9.0 |
This function is not supported in earlier versions. |
Emits a burst of particles from the particle emitter.
Contents
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 == ' ' then
psystem:emit(32)
end
end
See Also
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