Point inPolygon | GameDev.net

I am having problem with finding point in polygon test. I can generate the BSP tree properly. and donn't know exectly how to check polygon intersection point etc. 1) I don't see anything in lineOfSight() testing if the intersection point is inside the polygon. I think that if the intersection point is inside the polygon, lineOfSight() should return true so the camera is not allowed to pass through the polygon. The logic i am working is something like this: code from lineofsight() function.

[source lang ="cpp"]
if( Node->bIsLeaf)
        return false;
    int PointA = classifyPoint(Start, Node->Splitter);
    int PointB = classifyPoint(End,   Node->Splitter);

    // Check if only in front or on polygon.
    if( PointA != POINTPOSITION_BACK && PointB != POINTPOSITION_BACK )
        return lineOfSight(Start,End,Node->Front);

    // Check if only in back.
    if( PointA != POINTPOSITION_FRONT && PointB != POINTPOSITION_FRONT )
        return lineOfSight(Start,End,Node->Back);
    // Crossing polygon, need intersection point.
getIntersect( Start, End, (D3DXVECTOR3 *)&Node->Splitter->VertexList[0],  &Node->Splitter->Normal, &intersection, &temp);   

 if( PointA == POINTPOSITION_FRONT )
    {
        // Crossing from front to back.
        return lineOfSight( Start, &intersection, Node->Front ) ||
                  // Don't allow crossing polygon from front to back.
                  // pointInPolygon() to be implemented.
    pointInPolygon( &intersection, (D3DXVECTOR3 *)&Node->Splitter->VertexList[0], 
                  &Node->Splitter->Normal ) || lineOfSight( &intersection, End, Node->Back );
    }
    else
    {
        // Crossing from back to front.
        return lineOfSight( Start, &intersection, Node->Back ) ||
                  lineOfSight( &intersection, End, Node->Front );
    }

Topic Locked