Difference between revisions of "ParticleSystem:emit"
m (→Spawn a bunch of particles) |
m (Fix example for LÖVE 0.10.1) |
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Line 16: | Line 16: | ||
<source lang="lua"> | <source lang="lua"> | ||
function love.load() | function love.load() | ||
− | local img = love.graphics.newImage(' | + | local img = love.graphics.newImage('res/img/16x16_sm.png') |
− | psystem = love.graphics.newParticleSystem(img, 32) | + | psystem = love.graphics.newParticleSystem(img, 32) |
− | psystem:setParticleLifetime(2, 5) | + | psystem:setParticleLifetime(2, 5) -- Particles live at least 2s and at most 5s. |
− | psystem:setLinearAcceleration(-5, -5, 50, 100) | + | psystem:setLinearAcceleration(-5, -5, 50, 100) -- Randomized movement towards the bottom of the screen. |
− | psystem:setColors(255, 255, 255, 255, 255, 255, 255, 0) | + | psystem:setColors(255, 255, 255, 255, 255, 255, 255, 0) -- Fade to black. |
end | end | ||
function love.draw() | function love.draw() | ||
-- Draw the particle system at the center of the game window. | -- 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) | + | love.graphics.draw(psystem, love.graphics.getWidth() * 0.5, love.graphics.getHeight() * 0.5) |
end | end | ||
function love.update(dt) | function love.update(dt) | ||
− | psystem:update(dt) | + | psystem:update(dt) |
end | end | ||
function love.keypressed(key) | function love.keypressed(key) | ||
− | if key == ' ' then | + | if key == 'space' then |
psystem:emit(32) | psystem:emit(32) | ||
end | end |
Revision as of 12:40, 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.
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('res/img/16x16_sm.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
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