Function PointWithinTriangle

src/SB/Core/gc/iCollide.cpp:35–112

}

S32 PointWithinTriangle(xVec3* _pt, xVec3** _tri, xVec3* _normal)
{
    RwV3d* pt = (RwV3d*)_pt;
    RwV3d** tri = (RwV3d**)_tri;
    RwV3d* normal = (RwV3d*)_normal;
    Dimension dimension;
    F32 absX = iabs(normal->x);
    F32 absY = iabs(normal->y);
    F32 absZ = iabs(normal->z);
    S32 inside = FALSE;
    S32 i;
    S32 j;

    if (absZ > absY)
    {
        if (absZ > absX)
        {
            dimension = ZDIM;
        }
        else
        {
            dimension = XDIM;
        }
    }
    else
    {
        if (absY > absX)
        {
            dimension = YDIM;
        }
        else
        {
            dimension = XDIM;
        }
    }

    switch (dimension)
    {
    case XDIM:
        for (i = 0, j = 2; i < 3; j = i, i++)
        {
            if (((tri[i]->y <= pt->y && pt->y < tri[j]->y) ||
                 (tri[j]->y <= pt->y && pt->y < tri[i]->y)) &&
                (pt->z < tri[i]->z + ((pt->y - tri[i]->y) * (tri[j]->z - tri[i]->z)) /
                                         (tri[j]->y - tri[i]->y)))
            {
                inside = !inside;
            }
        }
        break;
    case YDIM:
        for (i = 0, j = 2; i < 3; j = i, i++)
        {
            if (((tri[i]->z <= pt->z && pt->z < tri[j]->z) ||
                 (tri[j]->z <= pt->z && pt->z < tri[i]->z)) &&
                (pt->x < tri[i]->x + ((pt->z - tri[i]->z) * (tri[j]->x - tri[i]->x)) /
                                         (tri[j]->z - tri[i]->z)))
            {