Where is the light gone ?
Blitz3D Forums/Blitz3D Beginners Area/Where is the light gone ?
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| If i use createcube(), the cube will be affected by light/lightrange. But if i create my own cubemesh nothing happens. I tried different flags for LoadBrush, BrushFx etc but nothing seems to work. Here is an example. Simply change file$ to any texturefile and change the 'if 1=1' to 'if 1=0' to see the differences to createcube(). Use the spacebar then to change the lightrange. Any Idea ? Graphics3D 640,480 camera = CreateCamera() MoveEntity camera,0,0,-5 ;ChangeDir "F:\programming\Blitz3D\samples\" Global file$="gfx/1.jpg" ;CHANGE to 1=1 to use cubebox ! If 1=1 then ball = Create_cubebox() ;no light here !? Else ball = CreateCube() ;light ok brush = LoadBrush(file$,flag) PaintEntity ball,brush EndIf lite = CreateLight(3) MoveEntity lite,5,0,-5 PointEntity lite,ball range# = 0.5 LightRange lite,range While Not KeyDown(1) TurnEntity ball,0.4,0.4,0.0 RenderWorld:Flip If KeyHit(57) Then ; hit SPACEBAR to increase light range range = range + 0.5 LightRange lite,range EndIf Wend End Function create_cubebox() mesh = CreateMesh() flag = 49 ;front face brush = LoadBrush(file$,flag,1,1) BrushFX brush,2 BrushShininess brush,0.5 surface = CreateSurface(mesh,brush) AddVertex surface,-1,+1,-1,0,0 AddVertex surface,+1,+1,-1,1,0 AddVertex surface,+1,-1,-1,1,1 AddVertex surface,-1,-1,-1,0,1 AddTriangle surface,0,1,2 AddTriangle surface,0,2,3 FreeBrush brush ;right face brush = LoadBrush(file$,flag) surface = CreateSurface(mesh,brush) AddVertex surface,+1,+1,-1,0,0 AddVertex surface,+1,+1,+1,1,0 AddVertex surface,+1,-1,+1,1,1 AddVertex surface,+1,-1,-1,0,1 AddTriangle surface,0,1,2 AddTriangle surface,0,2,3 FreeBrush brush ;back face brush = LoadBrush(file$,flag) surface = CreateSurface(mesh,brush) AddVertex surface,+1,+1,+1,0,0 AddVertex surface,-1,+1,+1,1,0 AddVertex surface,-1,-1,+1,1,1 AddVertex surface,+1,-1,+1,0,1 AddTriangle surface,0,1,2 AddTriangle surface,0,2,3 FreeBrush brush ;left face brush = LoadBrush(file$,flag) surface = CreateSurface(mesh,brush) AddVertex surface,-1,+1,+1,0,0 AddVertex surface,-1,+1,-1,1,0 AddVertex surface,-1,-1,-1,1,1 AddVertex surface,-1,-1,+1,0,1 AddTriangle surface,0,1,2 AddTriangle surface,0,2,3 FreeBrush brush ;top face brush = LoadBrush(file$,flag) surface = CreateSurface(mesh,brush) AddVertex surface,-1,+1,+1,0,1 AddVertex surface,+1,+1,+1,0,0 AddVertex surface,+1,+1,-1,1,0 AddVertex surface,-1,+1,-1,1,1 AddTriangle surface,0,1,2 AddTriangle surface,0,2,3 FreeBrush brush ;bottom face brush = LoadBrush(file$,flag) surface = CreateSurface(mesh,brush) AddVertex surface,-1,-1,-1,1,0 AddVertex surface,+1,-1,-1,1,1 AddVertex surface,+1,-1,+1,0,1 AddVertex surface,-1,-1,+1,0,0 AddTriangle surface,0,1,2 AddTriangle surface,0,2,3 FreeBrush brush Return mesh End Function |
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| You haven't given your cube any normals by using the VertexNormal command. Without normals, the cube can't be lit properly. |
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| UpdateNormals or sswift's Calculate_Normals will set all the normals to respectable defaults for you. |
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| Don't think updatenormals will work on a cube as it'll smooth the normals. |
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| Updatenormals did it ! Thanks a lot !!! |
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| As I said, UpdateNormals doesn't work properly on cubes. Put a rotating Blitz cube next to yours and you'll see the difference. |
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