[SOLVED] MeshVertexColor : how to enable Alpha

[eddy]

Hi,
I don't understand how to enable vertex alpha.

[solution below]

Code: Select all

#CameraSpeed = 3
#SQRT13 = 0.57735026

If InitEngine3D() And InitSprite()
   If OpenWindow(1, 0, 0, 800, 600, "Loading", #PB_Window_BorderLess |#PB_Window_ScreenCentered |#PB_Window_SystemMenu) And
      OpenWindowedScreen(WindowID(1), 0, 0, 800, 600)
      ; Define all the vertices and their attributes
      CreateMesh(0)
      MeshVertexPosition(-100, 100, -100)
      MeshVertexNormal(-#SQRT13, #SQRT13, -#SQRT13)
      MeshVertexColor(RGBA(255, 0, 0, 100))
      
      MeshVertexPosition(100, 100, -100)
      MeshVertexNormal(#SQRT13, #SQRT13, -#SQRT13)
      MeshVertexColor(RGB(255, 0, 0))
      
      MeshVertexPosition(100, -100, -100)
      MeshVertexNormal(#SQRT13, -#SQRT13, -#SQRT13)
      MeshVertexColor(RGBA(Random(255), Random(255), Random(255), 180))
      
      MeshVertexPosition(-100, -100, -100)
      MeshVertexNormal(-#SQRT13, -#SQRT13, -#SQRT13)
      MeshVertexColor(RGBA(Random(255), Random(255), Random(255), 100))
      
      MeshVertexPosition(-100, 100, 100)
      MeshVertexNormal(-#SQRT13, #SQRT13, #SQRT13)
      MeshVertexColor(RGBA(Random(255), Random(255), Random(255), 220))
      
      MeshVertexPosition(100, 100, 100)
      MeshVertexNormal(#SQRT13, #SQRT13, #SQRT13)
      MeshVertexColor(RGBA(Random(255), Random(255), Random(255), 150))
      
      MeshVertexPosition(100, -100, 100)
      MeshVertexNormal(#SQRT13, -#SQRT13, #SQRT13)
      MeshVertexColor(RGBA(Random(255), Random(255), Random(255), 10))
      
      MeshVertexPosition(-100, -100, 100)
      MeshVertexNormal(-#SQRT13, -#SQRT13, #SQRT13)
      MeshVertexColor(RGBA(Random(255), Random(255), Random(255), 200))
      
      ; Define all the faces, based on the vertex index
      MeshFace(0, 2, 3)
      MeshFace(0, 1, 2)
      MeshFace(1, 6, 2)
      MeshFace(1, 5, 6)
      MeshFace(4, 6, 5)
      MeshFace(4, 7, 6)
      MeshFace(0, 7, 4)
      MeshFace(0, 3, 7)
      MeshFace(0, 5, 1)
      MeshFace(0, 4, 5)
      MeshFace(2, 7, 3)
      MeshFace(2, 6, 7)
      
      FinishMesh(1)
      mesh=MeshID(0)
      
      tex=CreateTexture(1, 512, 512)
      If StartDrawing(TextureOutput(1))
         DrawingMode(#PB_2DDrawing_AlphaBlend) ; needed for alphablending
         Box(0, 0, 512, 512, RGBA(78, 176, 160, 255))
         StopDrawing()
      EndIf
      mat=CreateMaterial(0, tex)
      MaterialCullingMode(0, #PB_Material_NoCulling)     ; double face 
      MaterialBlendingMode(0, #PB_Material_AlphaBlend)   ; allow alphablending and vertex alpha
      DisableMaterialLighting(0, 1)
      
      CreateEntity(0, mesh, mat)
      
      CreateCamera(10, 0, 0, 100, 100)
      MoveCamera(10, 0, 0, 1000, #PB_Absolute)
      CameraLookAt(10, 0, 0, 0)
      
      Repeat
         RotateEntity(0, 1, 1, 1, #PB_Relative)  ; rolling box
         RenderWorld()
         FlipBuffers()
      Until WaitWindowEvent(1)=#PB_Event_CloseWindow
   EndIf
   
Else
   MessageRequester("Error", "The 3D Engine can't be initialized", 0)
EndIf
End

[eddy]

problem solved
- alphablend mode was missing (I fixed code above)