Function get_lower_extent

src/SB/Core/x/xEnt.cpp:377–410

namespace
{
    F32 get_lower_extent(const xBound& bound)
    {
        switch (bound.type)
        {
        case XBOUND_TYPE_SPHERE:
        {
            return bound.sph.r;
        }
        case XBOUND_TYPE_BOX:
        {
            return bound.box.center.y - bound.box.box.lower.y;
        }
        case XBOUND_TYPE_OBB:
        {
            if (0.0f == bound.mat->up.x && 0.0f == bound.mat->up.z)
            {
                return bound.box.center.y -
                       (bound.mat->up.y * bound.box.box.lower.y + bound.mat->pos.y);
            }
            else
            {
                xBox box;
                xBoundGetBox(box, bound);

                return bound.box.center.y - box.lower.y;
            }
        }
        case XBOUND_TYPE_CYL:
        default:
        {
            return 0.0f;
        }
        }
    }

    bool collide_downward(xVec3& loc, xEnt*& hit, xScene& s, xEnt& ent, F32 max_dist)
    {