; ParticleEmitterShape 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

; Shape names for the overlay
Dim shape_name$(3)
shape_name$(0)="0 point"
shape_name$(1)="1 box 3x0.5x3"
shape_name$(2)="2 sphere radius 1.5"
shape_name$(3)="3 cone 1.5x1.5x1.5"

; Slow glowing motes so the emission volume is easy to see
emitter=CreateParticleEmitter(1000)
PositionEntity emitter,0,1.5,0
ParticleEmissionRate emitter,250
ParticleLifetime emitter,1,1.5
ParticleVelocity emitter,0,0.3,0,0.1,0.1,0.1
ParticleColor emitter,150,220,255,1,80,120,255,0
ParticleSize emitter,0.06,0.03,0.2
EntityBlend emitter,3

shape=2
ParticleEmitterShape emitter,2,1.5,1.5,1.5

While Not KeyDown(1)

    ; Keys 1-4 select point, box, sphere or cone emission
    If KeyHit(2)
        shape=0
        ParticleEmitterShape emitter,0
    EndIf
    If KeyHit(3)
        shape=1
        ParticleEmitterShape emitter,1,3,0.5,3
    EndIf
    If KeyHit(4)
        shape=2
        ParticleEmitterShape emitter,2,1.5,1.5,1.5
    EndIf
    If KeyHit(5)
        shape=3
        ParticleEmitterShape emitter,3,1.5,1.5,1.5
    EndIf

    ; 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   1/2/3/4: emitter shape   Esc: exit"
    Text 0,20,"ParticleEmitterShape: "+shape_name$(shape)

    Flip

Wend

End