Problem with lights

Hi,

I'm trying to create a 3D maze generator and I already wrote some functions to create 2 kinds of pathways.

I create a new mesh, add a surface to it.
After this, I add vertexes and triangles via functions.
This all works perfectly, but the mesh isn't affected by lights.

I placed a light in the scene, disabled ambient light, but no lighting effect on my mesh.
I even painted a brush onto my mesh, but still nothing.
I added a plane beneath the mesh and this is affect by the light.

How can I make my mesh light-sensitive?

Graphics3D 800, 600
SetBuffer BackBuffer()



plane = CreatePlane()
EntityColor plane, 255, 0, 0

camera = CreateCamera()
MoveEntity camera, 0, 8, 0

brush = CreateBrush(0, 255, 0)

AmbientLight 0,0,0
light = CreateLight(2)
MoveEntity light, 0, 15, 0
LightColor light, 255, 255, 255



Global MazeMesh = CreateMesh()
Global MazeSurf = CreateSurface(MazeMesh, brush)

CreateUpDown(0, 20)
CreateLeftRight(0, 20)



While Not KeyHit(1)
	If KeyDown(200) TurnEntity camera, -1, 0, 0 ; Up arrow
	If KeyDown(208) TurnEntity camera, 1, 0, 0 ; Down arrow
	If KeyDown(203) TurnEntity camera, 0, -1, 0 ; Left arrow
	If KeyDown(205) TurnEntity camera, 0, 1, 0 ; Right arrow

	If KeyDown(75) MoveEntity camera, -1, 0, 0 ; Num4
	If KeyDown(77) MoveEntity camera, 1, 0, 0 ; Num6
	If KeyDown(72) MoveEntity camera, 0, 0, 1 ; Num8
	If KeyDown(80) MoveEntity camera, 0, 0, -1 ; Num2

	RenderWorld
	Flip
Wend



Function CreateUpDown(x, z)
	; Create the left wall
	v0 = AddVertex(MazeSurf, x - 9, 0, z - 10)
	v1 = AddVertex(MazeSurf, x - 9, 0, z + 10)
	v2 = AddVertex(MazeSurf, x - 9, 5, z - 10)
	v3 = AddVertex(MazeSurf, x - 9, 5, z + 10)

	t0 = AddTriangle(MazeSurf, v0, v2, v1)
	t1 = AddTriangle(MazeSurf, v1, v2, v3)

	; Create the right wall
	v0 = AddVertex(MazeSurf, x + 9, 0, z + 10)
	v1 = AddVertex(MazeSurf, x + 9, 0, z - 10)
	v2 = AddVertex(MazeSurf, x + 9, 5, z + 10)
	v3 = AddVertex(MazeSurf, x + 9, 5, z - 10)

	t0 = AddTriangle(MazeSurf, v0, v2, v1)
	t1 = AddTriangle(MazeSurf, v1, v2, v3)
End Function

Function CreateLeftRight(x, z)
	; Create the bottom wall
	v0 = AddVertex(MazeSurf, x - 10, 0, z - 9)
	v1 = AddVertex(MazeSurf, x + 10, 0, z - 9)
	v2 = AddVertex(MazeSurf, x - 10, 5, z - 9)
	v3 = AddVertex(MazeSurf, x + 10, 5, z - 9)

	t0 = AddTriangle(MazeSurf, v0, v1, v3)
	t1 = AddTriangle(MazeSurf, v0, v3, v2)

	; Create the top wall
	v0 = AddVertex(MazeSurf, x - 10, 0, z + 9)
	v1 = AddVertex(MazeSurf, x + 10, 0, z + 9)
	v2 = AddVertex(MazeSurf, x - 10, 5, z + 9)
	v3 = AddVertex(MazeSurf, x + 10, 5, z + 9)

	t0 = AddTriangle(MazeSurf, v0, v2, v1)
	t1 = AddTriangle(MazeSurf, v1, v2, v3)
End Function

You need to update norms

http://www.blitzbasic.com/b3ddocs/command.php?name=UpdateNormals&ref=3d_a-z


Andy

Oh, thanks, it works now.

I've never done this before, and wanted to start with something easy (walls are just rectangular planes, merged together).

Making a spaceship with Addvertex and stuff is beyond my skills right now.

My 3D maze is coming along nicely.

The entire maze (10x10 structure) is defined within the file Maze001.dat (standard txt-file, written in Notepad).
The 3D model is generated via code (based on the data in the file Maze001.dat), also the UV-coords for each wall-section are applied via code.

Movement:
Arrow-Up and Arrow-Down: move forward and backwards.
MouseX and MouseY are for turning.
Keys Z and S are for moving up and down (so you can see the entire maze from high in the sky).
Spacebar: toggel gravity on/off.

Beware: the resolution is set to 1280x1024.

The entire source-code is included in the zip-file:
http://users.pandora.be/vge/downloads/Maze3DComplete.zip