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Task/Draw-a-sphere/PureBasic/draw-a-sphere-1.basic
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Task/Draw-a-sphere/PureBasic/draw-a-sphere-1.basic
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; Original by Comtois @ 28/03/06
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;
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; Updated/Formated by Fluid Byte @ March.24,2009
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;
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; http://www.purebasic.fr/english/viewtopic.php?p=281258#p281258
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Declare CreateSphere(M,P)
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Declare UpdateMesh()
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#_SIZEVERT = 36
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#_SIZETRIS = 6
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#FULLSCREEN = 0
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Structure VECTOR
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X.f
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Y.f
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Z.f
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EndStructure
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Structure VERTEX
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X.f
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Y.f
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Z.f
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NX.f
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NY.f
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NZ.f
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Color.l
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U.f
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V.f
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EndStructure
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Structure TRIANGLE
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V1.w
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V2.w
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V3.w
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EndStructure
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Macro CALC_NORMALS
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*PtrV\NX = *PtrV\X
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*PtrV\NY = *PtrV\Y
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*PtrV\NZ = *PtrV\Z
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EndMacro
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Global *VBuffer, *IBuffer
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Global Meridian = 50, Parallele = 50, PasLength = 4, Length
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Define EventID, i, NbSommet, CameraMode, Angle.f, Pas.f = 0.5
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InitEngine3D() : InitSprite() : InitKeyboard()
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Add3DArchive(GetTemporaryDirectory(),#PB_3DArchive_FileSystem)
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Add3DArchive(#PB_Compiler_Home + "Examples\Sources\Data\",#PB_3DArchive_FileSystem)
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If #FULLSCREEN
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OpenScreen(800,600,32,"Sphere 3D")
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Else
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OpenWindow(0,0,0,800,600,"Sphere 3D",#PB_Window_SystemMenu | 1)
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OpenWindowedScreen(WindowID(0),0,0,800,600,0,0,0)
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EndIf
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;-Texture
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CreateImage(0,128,128)
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StartDrawing(ImageOutput(0))
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For i = 0 To 127 Step 4
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Box(0,i,ImageWidth(0),2,RGB(255,255,255))
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Box(0,i + 2,ImageWidth(0),2,RGB(0,0,155))
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Next i
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StopDrawing()
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SaveImage(0,GetTemporaryDirectory() + "temp.bmp") : FreeImage(0)
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;-Material
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CreateMaterial(0,LoadTexture(0,"temp.bmp"))
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RotateMaterial(0,0.1,#PB_Material_Animated)
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;-Mesh
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CreateSphere(Meridian,Parallele)
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;-Entity
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CreateEntity(0,MeshID(0),MaterialID(0))
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ScaleEntity(0,60,60,60)
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;-Camera
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CreateCamera(0,0,0,100,100)
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MoveCamera(0,0,0,-200)
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CameraLookAt(0,EntityX(0),EntityY(0),EntityZ(0))
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;-Light
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AmbientColor(RGB(105, 105, 105))
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CreateLight(0, RGB(255, 255, 55), EntityX(0) + 150, EntityY(0) , EntityZ(0))
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CreateLight(1, RGB( 55, 255, 255), EntityX(0) - 150, EntityY(0) , EntityZ(0))
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CreateLight(2, RGB( 55, 55, 255), EntityX(0) , EntityY(0) + 150, EntityZ(0))
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CreateLight(3, RGB(255, 55, 255), EntityX(0) , EntityY(0) - 150, EntityZ(0))
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; ----------------------------------------------------------------------------------------------------
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; MAINLOOP
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; ----------------------------------------------------------------------------------------------------
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Repeat
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If #FULLSCREEN = 0
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Repeat
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EventID = WindowEvent()
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Select EventID
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Case #PB_Event_CloseWindow : End
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EndSelect
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Until EventID = 0
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EndIf
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Angle + Pas
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RotateEntity(0, Angle, Angle,Angle)
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If PasLength > 0 : UpdateMesh() : EndIf
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If ExamineKeyboard()
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If KeyboardReleased(#PB_Key_F1)
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CameraMode = 1 - CameraMode
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CameraRenderMode(0, CameraMode)
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EndIf
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EndIf
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RenderWorld()
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FlipBuffers()
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Until KeyboardPushed(#PB_Key_Escape)
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; ----------------------------------------------------------------------------------------------------
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; FUNCTIONS
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; ----------------------------------------------------------------------------------------------------
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Procedure CreateSphere(M,P)
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; M = Meridian
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; P = Parallele
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; The radius is 1. Front to remove it later, it's just for the demo.
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If M < 3 Or P < 2 : ProcedureReturn 0 : EndIf
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Protected Normale.VECTOR, NbSommet, i, j, Theta.f, cTheta.f, sTheta.f
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Protected Alpha.f, cAlpha.f, sAlpha.f, *PtrV.VERTEX, *PtrF.TRIANGLE, NbTriangle
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NbSommet = 2 + ((M + 1) * P)
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*VBuffer = AllocateMemory(#_SIZEVERT * Nbsommet)
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For i = 0 To M
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Theta = i * #PI * 2.0 / M
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cTheta = Cos(theta)
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sTheta = Sin(theta)
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For j = 1 To P
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Alpha = j * #PI / (P + 1)
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cAlpha = Cos(Alpha)
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sAlpha = Sin(Alpha)
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*PtrV = *VBuffer + #_SIZEVERT * ((i * P) + (j - 1))
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*PtrV\X = sAlpha * cTheta
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*PtrV\Y = sAlpha * sTheta
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*PtrV\Z = cAlpha
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*PtrV\U = Theta / (2.0 * #PI)
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*PtrV\V = Alpha / #PI
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CALC_NORMALS
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Next j
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Next i
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; Southpole
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*PtrV = *VBuffer + #_SIZEVERT * ((M + 1) * P)
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*PtrV\X = 0
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*PtrV\Y = 0
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*PtrV\Z = -1
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*PtrV\U = 0
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*PtrV\V = 0
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CALC_NORMALS
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; Northpole
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*PtrV + #_SIZEVERT
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*PtrV\X = 0
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*PtrV\Y = 0
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*PtrV\Z = 1
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*PtrV\U = 0
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*PtrV\V = 0
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CALC_NORMALS
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; Les facettes
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NbTriangle = 4 * M * P
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*IBuffer = AllocateMemory(#_SIZETRIS * NbTriangle)
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*PtrF = *IBuffer
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For i = 0 To M - 1
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For j = 1 To P - 1
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*PtrF\V1 = ((i + 1) * P) + j
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*PtrF\V2 = ((i + 1) * P) + (j - 1)
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*PtrF\V3 = (i * P) + (j - 1)
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*PtrF + #_SIZETRIS
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*PtrF\V3 = ((i + 1) * P) + j ;Recto
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*PtrF\V2 = ((i + 1) * P) + (j - 1) ;Recto
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*PtrF\V1 = (i * P) + (j - 1) ;Recto
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*PtrF + #_SIZETRIS
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*PtrF\V1 = i * P + j
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*PtrF\V2 = ((i + 1) * P) + j
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*PtrF\V3 = (i * P) + (j - 1)
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*PtrF + #_SIZETRIS
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*PtrF\V3 = i * P + j ;Recto
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*PtrF\V2 = ((i + 1) * P) + j ;Recto
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*PtrF\V1 = (i * P) + (j - 1) ;Recto
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*PtrF + #_SIZETRIS
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Next j
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Next i
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; The Poles
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For i = 0 To M - 1
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*PtrF\V3 = (M + 1) * P + 1
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*PtrF\V2 = (i + 1) * P
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*PtrF\V1 = i * P
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*PtrF + #_SIZETRIS
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*PtrF\V1 = (M + 1) * P + 1 ;Recto
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*PtrF\V2 = (i + 1) * P ;Recto
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*PtrF\V3 = i * P ;Recto
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*PtrF + #_SIZETRIS
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Next i
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For i = 0 To M - 1
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*PtrF\V3 = (M + 1) * P
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*PtrF\V2 = i * P + (P - 1)
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*PtrF\V1 = (i + 1) * P + (P - 1)
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*PtrF + #_SIZETRIS
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*PtrF\V1 = (M + 1) * P ;Recto
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*PtrF\V2 = i * P + (P - 1) ;Recto
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*PtrF\V3 = (i + 1) * P + (P - 1) ;Recto
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*PtrF + #_SIZETRIS
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Next i
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If CreateMesh(0,100)
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Protected Flag = #PB_Mesh_Vertex | #PB_Mesh_Normal | #PB_Mesh_UVCoordinate | #PB_Mesh_Color
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SetMeshData(0,Flag,*VBuffer,NbSommet)
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SetMeshData(0,#PB_Mesh_Face,*IBuffer,NbTriangle)
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ProcedureReturn 1
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EndIf
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ProcedureReturn 0
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EndProcedure
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; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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Procedure UpdateMesh()
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Protected NbTriangle = 4 * Meridian * Parallele
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Length + PasLength
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If Length >= NbTriangle
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PasLength = 0
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Length = Nbtriangle
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EndIf
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SetMeshData(0,#PB_Mesh_Face,*IBuffer,Length)
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EndProcedure
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19
Task/Draw-a-sphere/PureBasic/draw-a-sphere-2.basic
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19
Task/Draw-a-sphere/PureBasic/draw-a-sphere-2.basic
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@ -0,0 +1,19 @@
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SCREEN 13 ' enter high-color graphic mode
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' sets palette colors B/N
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FOR i = 0 TO 255
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PALETTE 255 - i, INT(i / 4) + INT(i / 4) * 256 + INT(i / 4) * 65536
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NEXT i
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PALETTE 0, 0
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' draw the sphere
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FOR i = 255 TO 0 STEP -1
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x = 50 + i / 3
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y = 99
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CIRCLE (x, y), i / 3, i
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PAINT (x, y), i
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NEXT i
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' wait until keypress
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DO: LOOP WHILE INKEY$ = ""
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END
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