; ParticleMax Example
; -------------------
; Requires Extended mode.

Graphics3D 640,480,0,2
SetBuffer BackBuffer()

camera=CreateCamera()
PositionEntity camera,0,2,-6
CameraClsColor camera,8,12,24

floor=CreatePlane()
EntityColor floor,30,34,44

; A dense bonfire that constantly wants more particles than allowed
emitter=CreateParticleEmitter(400)
PositionEntity emitter,0,0.5,0
ParticleEmissionRate emitter,400
ParticleLifetime emitter,1.5,2.5
ParticleVelocity emitter,0,2.5,0,0.6,0.4,0.6
ParticleColor emitter,255,220,120,1,255,80,0,0
ParticleSize emitter,0.12,0.03,0.2
EntityBlend emitter,3

maximum=400

While Not KeyDown(1)

    ; [ / ] resize the emitter's live-particle cap
    changed=False
    If KeyHit(26) And maximum>100
        maximum=maximum-100
        changed=True
    EndIf
    If KeyHit(27) And maximum<2000
        maximum=maximum+100
        changed=True
    EndIf
    If changed Then ParticleMax emitter,maximum

    ; Arrow keys move the camera
    If KeyDown(200) Then MoveEntity camera,0,0,0.1
    If KeyDown(208) Then MoveEntity camera,0,0,-0.1
    If KeyDown(203) Then TurnEntity camera,0,1,0
    If KeyDown(205) Then TurnEntity camera,0,-1,0

    ; UpdateWorld also advances the particle simulation
    UpdateWorld
    RenderWorld

    Text 0,0,"Arrow keys: move camera   [ / ] : maximum particles   Esc: exit"
    Text 0,20,"ParticleMax emitter,"+maximum
    Text 0,40,"Live particles: "+CountParticles(emitter)+" (count saturates at the maximum)"

    Flip

Wend

End