au3Irr2 Function Reference
_IrrAddGravityParticleAffectorAdds a gravity affector to a particle system gradually pulling the particles in the direction of the effect.
#Include <au3Irrlicht2.au3>
_IrrAddGravityParticleAffector($h_ParticleSystem, $f_X, $f_Y, $f_Z, $i_TimeForceLost = 1000)
Parameters
| $h_ParticleSystem | Handle of the particle system the created affector is attached to. |
| $f_X, $f_Y, $f_Z | Set the direction and force of gravity in all 3 dimensions. |
| $i_TimeForceLost | [optional] Set the time in milliseconds when the gravity force is totally lost. At that point the particle does not move any more. |
Return Value
success: Handle of the created affector.failure: false
Remarks
The gravity affector is adding a small amount of velocity to the particles each frame. Although its called a gravity affector it can be used to push the particles in any direction so you can have drifting smoke bubbling fountains, to make a wind effect and have the particles drift off to the side, etc.
Related
_IrrAddParticleSystemToScene, _IrrSetParticleAffectorEnable, _IrrRemoveAffectors
Example
#include "au3Irrlicht2.au3"
_IrrStart()
; add particle system with default emitter to the irrlicht scene manager
local $particleSystem = _IrrAddParticleSystemToScene($IRR_DEFAULT_EMITTER)
local $ParticleTexture = _IrrGetTexture( "./media/ParticleGrey.bmp" )
; setup this affector to let the particles drift off
_IrrAddGravityParticleAffector( $particleSystem, -0.4, 0, 0.8, 3000)
_IrrSetNodeMaterialTexture( $particleSystem, $ParticleTexture, 0 )
_IrrSetNodeMaterialFlag( $particleSystem, $IRR_EMF_LIGHTING, $IRR_OFF )
_IrrSetNodeMaterialType ( $particleSystem, $IRR_EMT_TRANSPARENT_ADD_COLOR )
local $nodeCamera = _IrrAddCamera( 80,0,0, 0,40,40 )
WHILE _IrrRunning()
_IrrBeginScene( 0,0,50 )
_IrrDrawScene()
_IrrEndScene()
WEND
_IrrStop()