;Babylon.sbi - Tube

EnableExplicit

IncludeFile "babylon/babylon.sbi"
UseModule BJS

Enumeration
  #mf
  #mfRender
EndEnumeration

Global Scene, Camera, Tube, TubeMat, Light, 

;A tube consists of an array of 3D vectors. Example with 5 vectors
Dim TubeVectors.NewVector(4)

Declare   LoadGame()
Declare.f Radius(Position, Distance.f)
Declare   RenderGame()

;Window & Render
OpenWindow(#mf, 0, 0, 900, 600, "CreateTube()", #PB_Window_ScreenCentered)
CanvasGadget(#mfRender, 0, 0, 900, 600, #PB_Canvas_Transparent)

;Init Babylon with a render on a canvas and load game
InitEngine(@LoadGame(), #mfRender)

Procedure LoadGame()    
  Scene = CreateScene()
  
  If Scene
    
    ;Camera & Light
    Camera = CreateCamera("camera", 0, 10, 20, #BJS_ArcRotate)  
    Light = CreateLight("light", 0, 10, 0, 1)
    
    ;Create Tube 
    TubeVectors(0)\x = 0    
    TubeVectors(0)\y = 0
    TubeVectors(0)\z = 0

    TubeVectors(1)\x = 0    
    TubeVectors(1)\y = 1
    TubeVectors(1)\z = 0
    
    TubeVectors(2)\x = 0    
    TubeVectors(2)\y = 2
    TubeVectors(2)\z = 0
    
    TubeVectors(3)\x = 0    
    TubeVectors(3)\y = 3
    TubeVectors(3)\z = 0
    
    TubeVectors(4)\x = 0    
    TubeVectors(4)\y = 4
    TubeVectors(4)\z = 0
    
    ;The creation of this tube uses a procedure to calculate the rasius of each vector 
    Tube = CreateTube("My tube", TubeVectors(), 0, 32, @Radius())
    
    ;Material
    TubeMat = CreateMaterial("tube material", "data/textures/misc.jpg")
    SetMaterial(Tube, TubeMat)
    
    RenderLoop(@RenderGame())
  EndIf
EndProcedure

;This procedure will be called at each point of the path while constructing the tube.
;It will then be passed two arguments : 
;   -The position of the current point (1, 2, 3, 4, etc ...)
;   -The distance of this point from the beginnig of the tube.
;   -Your procedure must just return a radius value.
Procedure.f Radius(Position, Distance.f)
  Protected Radius.f
  Radius = 3 * Cos(Distance / 5);
  
  Debug "Position " + Str(Position)  + " Radius " + StrF(Radius)
  ProcedureReturn Radius
EndProcedure


Procedure RenderGame()
  RotateMesh(Tube, 0, 0.01, 0, #PB_Relative)
  RenderWorld() 
EndProcedure