Code archives/3D Graphics - Effects/Smoke Particle Engine
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| The Functions and Types allow you to attach a particle emitter to any existing entity (Meshes, Sprites, Pivots, Lights etc) The emitters, once placed, will continuously emit particles each loop. |
;************************ ;GALACTIC ALLEGIANCE v3.2 ;************************ ;******* FUNCTIONS ***** ;Coded By PJ Chowdhury 2006 ;For the Galactic Allegiance Open-Source Project ;These Functions Released as Full Public Domain ;The functions are used to create a particle emitter which will ;Then continue To emit smoke-like particles of the chosen specifications ;************************************************************************************************ ; EXAMPLE ;************************************************************************************************ Graphics3D 800,600,32,2 SetBuffer BackBuffer() cam=CreateCamera() CameraViewport cam,0,0,800,600 CameraRange cam,1,100 MoveEntity cam,0,0,-10 tex=CreateTexture(128,128,3) SetBuffer TextureBuffer(tex) ClsColor 0,0,0 Cls Color 255,255,255 Oval 64,64,64,64,1 SetBuffer BackBuffer() Global SmokeSprite=CreateSprite() ;*YOU WILL NEED A GLOBAL SPRITE WITH THE HANDLE SmokeSprite FOR THE FUNCTIONS TO WORK EntityFX SmokeSprite,1 EntityTexture SmokeSprite,tex EntityAlpha SmokeSprite,0 AmbientLight 180,180,180 sun=CreateLight(1) PositionEntity sun,40,20,60 PointEntity sun,cam cube=CreateCube() EntityColor cube,180,0,0 MoveEntity cube,-5,0,2 EntityPickMode cube,2 sphere=CreateSphere(20) EntityColor sphere,0,180,0 MoveEntity sphere,5,0,2 EntityPickMode sphere,2 cylinder=CreateCylinder(20,1) MoveEntity cylinder,0,4,10 RotateMesh cylinder,90,0,45 EntityColor cylinder,0,0,180 EntityPickMode cylinder,2 piv=CreatePivot() pyra=CreateCone(4,1) EntityColor pyra,180,180,0 MoveEntity pyra,0,-2,5 EntityPickMode pyra,2 EntityParent pyra,piv While Not KeyDown(1) TurnEntity piv,0,0.5,0 TurnEntity cylinder,1,5,0 If MouseHit(1) msh=CameraPick(cam,MouseX(),MouseY()) If msh>0 p=msh s#=Rnd#(0.001,0.5) d=Rand(1,5) c=Rand(64,192) f#=Rnd#(0.01,0.1) Emit_Smoke(p,s#,d,c,c,c,f#,Rand(0,20)) EndIf EndIf Update_Smoke() UpdateWorld RenderWorld Text 0,0,"CLICK ON A PRIMITIVE MESH TO APPLY A RANDOMISED SMOKE EMITTER" Text 0,100,"LAST EMITTER: "+msh Flip Wend ;************************************************************************************************* ; FUNCTIONS AND TYPES ;************************************************************************************************* Type Smoke_Particles Field Sprite Field Alpha# Field Fade# End Type Type Smoke_Emitter Field Pivot Field SP_Red Field SP_Green Field SP_Blue Field SP_Dens Field SP_Scale# Field SP_Fade# Field SP_Var End Type ;The main user-defining function is Emit_Smoke, ;Call this Function Whenever you wish To Add an emitter To your world ;Parent_Entity is the entity to which you wish to attach the emitter ;Sm_Scale# is the size of both the particles and the spread of the smoke effect ;Sm_Density changes the number of particles created per frame. Integers only ;Smoke_Red, Green and Blue determine the colour of smoke emitted by that emitter. ;Sm_fade# is the rate at which the particles fade out (Floats between 0.005 and 0.1 are best) ;Sm_Colour_Var is an amount (0 to 50 is a good range) to vary the colour of the smoke by Function Emit_Smoke(Parent_Entity,Sm_Scale#,Sm_Density,Smoke_Red,Smoke_Green,Smoke_Blue,Sm_Fade#,Sm_Colour_Var) Sm_emit.Smoke_Emitter= New Smoke_Emitter Sm_emit\pivot=CreatePivot() ;This pivot is in effect The particle emitter PositionEntity Sm_emit\pivot,EntityX#(Parent_Entity,1),EntityY#(Parent_Entity,1),EntityZ#(Parent_Entity,1),1 EntityParent Sm_emit\pivot,Parent_Entity ;Attach pivot to Parent Entity Sm_emit\SP_Dens=Sm_Density ;These lines feed Sm_emit\SP_Red=Smoke_Red ;the relevant data Sm_emit\SP_Green=Smoke_Green ;to the emitter Sm_emit\SP_Blue=Smoke_Blue ; Sm_emit\SP_Scale#=Sm_Scale# ;ensuring a record Sm_emit\SP_Fade#=Sm_Fade# ;is kept of the Sm_emit\SP_Var=Sm_Colour_Var ;particle criteria End Function Function Update_smoke() ;This function should be called each loop. For upd_Smoke.Smoke_Emitter=Each Smoke_Emitter For f=1 To upd_Smoke\SP_Dens ;sets a small loop to generate more particles for higher densities SmPart.Smoke_Particles = New Smoke_Particles ;Generates New Smoke Particles SmPart\Sprite=CopyEntity (SmokeSprite) ;Copies the generic Smoke Sprite SmPart\Alpha#=1 ;Sets the particles to be initially visible SmPart\Fade#=upd_Smoke\SP_Fade# ;Gives this Particle a fade index part_ScaleSmall#=((upd_smoke\SP_Scale#)/10) ; scl#=Rnd#(part_Scale#,upd_smoke\SP_Scale#) ; ; ScaleSprite SmPart\Sprite,scl#,scl# ;Scales the particle EntityColor SmPart\Sprite,upd_smoke\SP_Red+(Rand(0-upd_smoke\SP_var,upd_smoke\SP_var)),upd_smoke\SP_Blue+(Rand(0-upd_smoke\SP_var,upd_smoke\SP_var)),upd_smoke\SP_Green+(Rand(0-upd_smoke\SP_var,upd_smoke\SP_var)) ;Colours the particle PositionEntity SmPart\Sprite,EntityX#(upd_Smoke\Pivot,1),EntityY#(upd_Smoke\Pivot,1),EntityZ#(upd_Smoke\Pivot,1),1 part_ScaleSmall#=Part_ScaleSmall#*5 MoveEntity SmPart\Sprite,Rnd#(0-Part_ScaleSmall#,Part_ScaleSmall#),Rnd#(0-Part_ScaleSmall#,Part_ScaleSmall#),Rnd#(0-Part_ScaleSmall#,Part_ScaleSmall#) ;positions the particle Next Next For Upd_Parts.Smoke_Particles = Each Smoke_Particles ;This should also be called each loop EntityAlpha Upd_Parts\Sprite,Upd_Parts\Alpha# ; Upd_Parts\Alpha#=Upd_Parts\Alpha# - Upd_Parts\Fade# ; Fades the particle TranslateEntity Upd_Parts\Sprite,0,0.1,0 ;Makes the particles rise If Upd_Parts\Alpha#<=0 Then Delete Upd_Parts ;Destroy fully-faded articles Next End Function |