December 10, 2019, 02:27:22 PM

Author Topic: merge 1 mesh with UVs for diffuse and 1 mesh with UVs for lightmap, in 1 mesh  (Read 317 times)

Offline RemiD

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merge 1 mesh with UVs for diffuse and 1 mesh with UVs for lightmap, in 1 mesh with 2 UVs coordsets, one for diffuse, one for lightmap
useful to build maps with premade parts...
Code: [Select]
;CopyMergeMeshesWithUVCoordsets() + CopyTexture()
;this demonstrates how to load 1 mesh with UVs for diffuse texture and 1 mesh with UVs for lightmap texture,
;and to merge the 2 meshes in 1 new mesh 1 surface with 2 UVs coordsets (1 for diffuse texture, 1 for lightmap texture)
;and also how to copy a texture to a new texture (useful to copy lightmaps if you use premade parts to build your map)
;graphics window
Graphics3D(854,480,32,2)

SeedRnd(MilliSecs())

;PREMADE MESHES TEXTURES
;---------------------------------------------------------------------------------------

Global PixAlpha% = 0
Global PixRed% = 0
Global PixGreen% = 0
Global PixBlue% = 0

;load premade meshes / textures
Global TempCM = LoadMesh("column-CR.b3d") : ScaleMesh(TempCM,0.01,0.01,0.01) ;mesh with uvs for color/diffuse texture
PositionEntity(TempCM,-3.1,0,0,True)

Global TempLSM = LoadMesh("column-LSR.b3d") : ScaleMesh(TempLSM,0.01,0.01,0.01) ;mesh with uvs for lightmap texture
PositionEntity(TempLSM,+3.1,0,0,True)

Global TempCT = LoadTexture("column-CT.png",1) : TextureCoords(TempCT,0) : EntityTexture(TempCM,TempCT,0,0) ;color/diffuse texture

Global TempLST = LoadTexture("column-LST.png",1) : TextureCoords(TempLST,0) : EntityTexture(TempLSM,TempLST,0,0) ;lightmap texture

;merge the 2 separate meshes with 2 different uvs into 1 mesh (1 surface) with 2 uvs coordsets
Global NewM = CopyMergeMeshesWithUVCoordsets(TempCM,TempLSM)
PositionEntity(NewM,0,0,0,True)
;copy the 2 textures
Global NewCT = CopyTexture(TempCT) : TextureCoords(NewCT,0) : EntityTexture(NewM,NewCT,0,0) ;uvs coordset 0, layer 0 (diffuse texture)
Global NewLST = CopyTexture(TempLST) : TextureCoords(NewLST,1) : EntityTexture(NewM,NewLST,0,1) ;uvs coordset 1, layer 1 (lightmap texture)

;delete the loaded meshes/textures
;FreeEntity(TempCM)
;FreeEntity(TempLSM)
;FreeTexture(TempCT)
;FreeTexture(TempLST)

;---------------------------------------------------------------------------------------

;Input
Global MX%
Global MY%
Global MXDiff%
Global MYDiff%

;Origine
Global Origine = CreateCube()
ScaleMesh(Origine,0.01,0.01,0.01)
EntityColor(Origine,255,000,255)
EntityFX(Origine,1)
HideEntity(Origine)

;Camera
Global Camera = CreateCamera()
CameraViewport(Camera,0,0,GraphicsWidth(),GraphicsHeight())
CameraRange(Camera,0.15,150)
CameraClsColor(Camera,000,000,000)

;InteractionMode
Global InteractionMode%
Const C2D% = 1
Const C3D% = 2
InteractionMode = C3D
HidePointer()

;Ghost
Global GhostRoot
Global GhostRootYaw#
Global GhostEyes
Global GhostEyesPitch#
AddGhost()

;

;light
DLight = CreateLight(1)
LightColor(DLight,240,240,240)
PositionEntity(DLight,0,1000,-1000,True)
RotateEntity(DLight,45,0,0,True)

AmbientLight(060,060,060)

PositionEntity(GhostRoot,0,1.65,-5,True)

Global MainLoopTimer = CreateTimer(30)

Main()

End()

Function Main()

 Repeat

  MainLoopMilliStart% = MilliSecs()
 
  MX = MouseX() : MY = MouseY()

  MXDiff = MouseXSpeed() : MYDiff = MouseYSpeed()

  UpdateInteractionMode()
  If( InteractionMode = C2D )
   ;
  Else If( InteractionMode = C3D )
   UpdateGhost()    
  EndIf

  WireFrame(False)
  If( KeyDown(2)=1 )
   WireFrame(True)
  EndIf

  PositionEntity(Camera,EntityX(GhostEyes,True),EntityY(GhostEyes,True),EntityZ(GhostEyes,True),True)
  RotateEntity(Camera,EntityPitch(GhostEyes,True),EntityYaw(GhostEyes,True),EntityRoll(GhostEyes,True),True)

  CameraViewport(Camera,0,0,GraphicsWidth(),GraphicsHeight())
  CameraClsColor(Camera,000,000,000)
  SetBuffer(BackBuffer())
  RenderWorld()

  Color(255,255,255)
  CText("Tris = "+TrisRendered(),0,0)
  CText("FPS = "+FPS,0,15)

  ;Flip(1)
  WaitTimer(MainLoopTimer)
  VWait():Flip(False)

  MainLoopMilliTime = MilliSecs() - MainLoopMilliStart
  If( MainLoopMilliTime < 1 )
   MainLoopMilliTime = 1
  EndIf

  FPS% = 1000.0/MainLoopMilliTime

 Until( KeyDown(1)=1 )

End Function

Function CText(TextStr$,PX%,PY%)

 Text(PX,PY,TextStr,False,False)

End Function

Function UpdateInteractionMode()

 If( KeyHit(15)=1 )
  If( InteractionMode = C2D )
   InteractionMode = C3D
   HidePointer()
  Else If( InteractionMode = C3D )
   InteractionMode = C2D
   ShowPointer()
  EndIf
 EndIf

End Function

Function AddGhost()
 
 GhostRoot = CreatePivot()

 GhostEyes = CreatePivot()
 EntityParent(GhostEyes,GhostRoot,True)

End Function

Function UpdateGhost()

 MoveMouse(GraphicsWidth()/2,GraphicsHeight()/2)
 GhostEyesPitch = GhostEyesPitch + Float(MYDiff)/10
 If( GhostEyesPitch < -89 )
  GhostEyesPitch = -89
 Else If( GhostEyesPitch > 89 )
  GhostEyesPitch = 89
 EndIf
 RotateEntity(GhostEyes,GhostEyesPitch,0,0,False)
 GhostRootYaw = GhostRootYaw - Float(MXDiff)/10
 RotateEntity(GhostRoot,0,GhostRootYaw,0,False)

 If( KeyDown(42) = 0 And KeyDown(29) = 0 )
  Speed# = 0.1
 Else If( KeyDown(42) = 1 And KeyDown(29) = 0 )
  Speed# = 1
 Else If( KeyDown(42) = 0 And KeyDown(29) = 1 )
  Speed# = 0.01
 EndIf

 If( KeyDown(17)=1 )
  MoveEntity(GhostRoot,0,0,Speed)
 Else If( KeyDown(31)=1 )
  MoveEntity(GhostRoot,0,0,-Speed)
 EndIf
 If( KeyDown(30)=1 )
  MoveEntity(GhostRoot,-Speed,0,0)
 Else If( KeyDown(32)=1 )
  MoveEntity(GhostRoot,Speed,0,0)
 EndIf
 If( KeyDown(16)=1 )
  MoveEntity(GhostRoot,0,-Speed,0)
 Else If( KeyDown(18)=1 )
  MoveEntity(GhostRoot,0,Speed,0)
 EndIf

 If( KeyDown(44)=1 )
  X# = EntityX(GhostRoot,True) : Z# = EntityZ(GhostRoot,True)
  PositionEntity(GhostRoot,X,1.65,Z,True)
 EndIf
 
End Function

Function CopyMergeMeshesWithUVCoordsets(CMesh,LSMesh)

 CSurface = GetSurface(CMesh,1)
 LSSurface = GetSurface(LSMesh,1)

 XMesh = CreateMesh()
 XSurface = CreateSurface(XMesh)

 ;copy vertices
 For VI% = 0 To CountVertices(CSurface)-1 Step 1
  VX# = VertexX(CSurface,VI) : VY# = VertexY(CSurface,VI) : VZ# = VertexZ(CSurface,VI)
  AddVertex(XSurface,VX,VY,VZ)
 Next

 ;copy triangles
 For TI% = 0 To CountTriangles(CSurface)-1 Step 1
  V0I% = TriangleVertex(CSurface,TI,0) : V1I% = TriangleVertex(CSurface,TI,1) : V2I% = TriangleVertex(CSurface,TI,2)
  AddTriangle(XSurface,V0I,V1I,V2I)
 Next

 ;copy vertices normals
 For VI% = 0 To CountVertices(CSurface)-1 Step 1
  VNX# = VertexNX(CSurface,VI) : VNY# = VertexNY(CSurface,VI) : VNZ# = VertexNZ(CSurface,VI)
  VertexNormal(XSurface,VI,VNX,VNY,VNZ)
 Next

 ;copy vertices UVs of coordset 0 (from CSurface)
 For VI% = 0 To CountVertices(CSurface)-1 Step 1
  VU# = VertexU(CSurface,VI,0) : VV# = VertexV(CSurface,VI,0)
  VertexTexCoords(XSurface,VI,VU,VV,0,0)
 Next

 ;copy vertices UVs of coordset 1 (from LSSurface)
 For VI% = 0 To CountVertices(LSSurface)-1 Step 1
  VU# = VertexU(LSSurface,VI,0) : VV# = VertexV(LSSurface,VI,0)
  VertexTexCoords(XSurface,VI,VU,VV,0,1)
 Next

 ;DebugLog(CountVertices(XSurface)+"vertices"+" "+CountTriangles(XSurface)+"triangles")

 Return XMesh

End Function

Function CopyTexture(InTex)
 
 InWidth% = TextureWidth(InTex) : InHeight% = TextureHeight(InTex)
 OutTex = CreateTexture(InWidth,InHeight,1)
 CopyRect(0,0,InWidth,InHeight,0,0,TextureBuffer(InTex),TextureBuffer(OutTex))
 Return OutTex

End Function
an example with meshes and textures : http://rd-stuff.fr/merge-one-mesh-with-UVs-for-diffuse-and-one-mesh-with-UVs-for-lightmap-in-one-mesh-20191020.7z
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