Difference between revisions of "Particles"
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=== Description === | === Description === | ||
A particle system which allows to draw several identical dots or bitmaps, with varying colour and orientation. | A particle system which allows to draw several identical dots or bitmaps, with varying colour and orientation. | ||
| + | |||
| + | '''Note''': Gideros 2022.5 adds Particles 3D | ||
=== Example === | === Example === | ||
| + | '''Particles 2D''' | ||
<source lang="lua"> | <source lang="lua"> | ||
-- gideros particles | -- gideros particles | ||
| Line 41: | Line 44: | ||
stage:addEventListener(Event.ENTER_FRAME, onEnterFrame) | stage:addEventListener(Event.ENTER_FRAME, onEnterFrame) | ||
| + | </source> | ||
| + | |||
| + | '''Particles 3D''' | ||
| + | <source lang="lua"> | ||
| + | -- Set up a fullscreen 3D viewport | ||
| + | local sw,sh=application:getContentWidth(),application:getContentHeight() | ||
| + | local view=D3.View.new(sw,sh,45,0.1,1000) | ||
| + | stage:addChild(view) | ||
| + | local scene=view:getScene() | ||
| + | |||
| + | -- We will embed our particles in a 3D mesh, to enable depth testing | ||
| + | local sc=Mesh.new(true) | ||
| + | scene:addChild(sc) | ||
| + | -- A particle set showing a bubble, for a fountain | ||
| + | local fountain=Particles.new(true,true) | ||
| + | fountain:setTexture(Texture.new("Bubble.png",true)) | ||
| + | sc:addChild(fountain) | ||
| + | fountain:setX(0) | ||
| + | fountain:setY(0) | ||
| + | fountain:setZ(0) | ||
| + | |||
| + | -- Our emitter for fountain | ||
| + | function Particles:fountain() | ||
| + | local da=math.random()*6.28 | ||
| + | local dh=math.cos(os:clock()/2) | ||
| + | local dr=math.random()*.001+.008*math.sin(os:clock()/2) | ||
| + | self:addParticles({ | ||
| + | { | ||
| + | x=0,y=0,z=0, | ||
| + | size=.05,ttl=200, | ||
| + | speedY=.025+.025*math.abs(dh),speedX=dr*math.sin(da),speedZ=dr*math.cos(da), | ||
| + | decay=vector(1,1,1),acceleration=vector(0,-.0005,0), | ||
| + | color=math.random(0x0, 0xffffff), | ||
| + | } | ||
| + | }) | ||
| + | end | ||
| + | |||
| + | -- Look at it | ||
| + | view:lookAt(0,4,3, 0,0,0) | ||
| + | |||
| + | -- Game loop | ||
| + | stage:addEventListener(Event.ENTER_FRAME,function(e) | ||
| + | for i=1,16 do fountain:fountain() end | ||
| + | end) | ||
</source> | </source> | ||
Revision as of 03:17, 26 April 2022
Supported platforms: 
Available since: Gideros 2016.06
Inherits from: Sprite
Description
A particle system which allows to draw several identical dots or bitmaps, with varying colour and orientation.
Note: Gideros 2022.5 adds Particles 3D
Example
Particles 2D
-- gideros particles
local particleGFX = Texture.new("gfx/yourgfx.png")
local stars = Particles.new()
stars:setTexture(particleGFX)
stage:addChild(stars)
-- GAME LOOP
function onEnterFrame(e)
if (e.time // 1) % 4 == 0 then
stars:addParticles({
{
x=math.random(480),y=math.random(320),
size=32,angle=math.random(360),
color=0xff00ff,alpha=0.8,
ttl=16*2,
speedX=0.01,speedY=0.01,speedAngular=0.15,
speedGrowth=0.9,
},
{
x=math.random(480),y=math.random(320),
size=16,angle=math.random(360),
color=0x00ffff,alpha=0.8,
ttl=16*16,
speedX=0.02,speedY=0.02,speedAngular=0.2,
speedGrowth=-0.1,
},
})
end
end
stage:addEventListener(Event.ENTER_FRAME, onEnterFrame)
Particles 3D
-- Set up a fullscreen 3D viewport
local sw,sh=application:getContentWidth(),application:getContentHeight()
local view=D3.View.new(sw,sh,45,0.1,1000)
stage:addChild(view)
local scene=view:getScene()
-- We will embed our particles in a 3D mesh, to enable depth testing
local sc=Mesh.new(true)
scene:addChild(sc)
-- A particle set showing a bubble, for a fountain
local fountain=Particles.new(true,true)
fountain:setTexture(Texture.new("Bubble.png",true))
sc:addChild(fountain)
fountain:setX(0)
fountain:setY(0)
fountain:setZ(0)
-- Our emitter for fountain
function Particles:fountain()
local da=math.random()*6.28
local dh=math.cos(os:clock()/2)
local dr=math.random()*.001+.008*math.sin(os:clock()/2)
self:addParticles({
{
x=0,y=0,z=0,
size=.05,ttl=200,
speedY=.025+.025*math.abs(dh),speedX=dr*math.sin(da),speedZ=dr*math.cos(da),
decay=vector(1,1,1),acceleration=vector(0,-.0005,0),
color=math.random(0x0, 0xffffff),
}
})
end
-- Look at it
view:lookAt(0,4,3, 0,0,0)
-- Game loop
stage:addEventListener(Event.ENTER_FRAME,function(e)
for i=1,16 do fountain:fountain() end
end)
MethodsParticles.new creates new particles group |
EventsConstants |
