[vb6] [d3d7] The collisions headache.

[Waxy]

Alright, with little progress the last time I tried to conquar this problem I've
decided to make a freash start and a freash explination.

I'm working on 3D collision detection. The surfaces are multi-point 2D pollygons to compose 3D objects.

I'll do Tree and Node's later, right now it's the basic problem of collision that's
getting to me.
I've been studying this:
http://astronomy.swin.edu.au/~pbourk...try/planeline/

but i've had little luck in getting a sucessful version of code.

My target is to give Start_Point, Destination_Point to a function and
retreive the Collision_Point.


Here is my data structure:

Player(MyPlayer).Location as D3DVECTOR  'where my specific player is on the map with X,Y, Z
Player(MyPlayer).Direction as D3DVECTOR 'the direction my player is facing with yaw, pitch, and roll (yes, its a person not a craft)
 
Faces()  as OBJECT3D 'contains all pollygons on the map.
Type OBJECT3D
    Texture As Long      '   DirectDrawSurface7 says "this face has texture of(alltextures(texture))"
    vFace() As D3DVERTEX         'Open ended array of vertices
    minXEdge As Long             'if you draw a 3D cube/rectangle around the surface then
    minYEdge As Long             'the X,Y,and Zs provided here are the boundery points 
    minZEdge As Long             'of that box.  These will aid me later with how i plan
    maxXEdge As Long             'to build nodes and trees.
    maxYEdge As Long
    maxZEdge As Long
    IsVisible As Boolean
    IsSolid As Boolean
End Type
 
'Faces(1).vface(1) is Polygon #1 Vertex #1
 
 
Function Rotated(Location as D3DVector, Direction As D3DVector, Distance as Single) as D3DVector 
'the Rotated function will return a the location of the object at "Location" 
'facing "Direction" and traveling a distance of "Distance" along said direction 
'as though there are no impacts.
'this is how i've been getting the intended end-point of travel.

I need this explained to me like i'm a 2 year old because i'm so througly frustrated with it.

Demo and screenshots can be found at http://www.vbforums.com/showthread.php?p=2056330