bool Clipper::CheckBox(const fixed_t *bspcoord)
{
angle_t angle1, angle2;
int boxpos;
const int* check;
// Find the corners of the box
// that define the edges from current viewpoint.
boxpos = (viewx <= bspcoord[BOXLEFT] ? 0 : viewx < bspcoord[BOXRIGHT ] ? 1 : 2) +
(viewy >= bspcoord[BOXTOP ] ? 0 : viewy > bspcoord[BOXBOTTOM] ? 4 : 8);
if (boxpos == 5) return true;
check = checkcoord[boxpos];
angle1 = R_PointToPseudoAngle (viewx, viewy, bspcoord[check[0]], bspcoord[check[1]]);
angle2 = R_PointToPseudoAngle (viewx, viewy, bspcoord[check[2]], bspcoord[check[3]]);
return SafeCheckRange(angle2, angle1);
}
bool Clipper::CheckBox(const fixed_t *bspcoord)
{
static const int checkcoord[12][4] = // killough -- static const
{
{3,0,2,1},
{3,0,2,0},
{3,1,2,0},
{0},
{2,0,2,1},
{0,0,0,0},
{3,1,3,0},
{0},
{2,0,3,1},
{2,1,3,1},
{2,1,3,0}
};
angle_t angle1, angle2;
int boxpos;
const int* check;
// Find the corners of the box
// that define the edges from current viewpoint.
boxpos = (viewx <= bspcoord[BOXLEFT] ? 0 : viewx < bspcoord[BOXRIGHT ] ? 1 : 2) +
(viewy >= bspcoord[BOXTOP ] ? 0 : viewy > bspcoord[BOXBOTTOM] ? 4 : 8);
if (boxpos == 5) return true;
check = checkcoord[boxpos];
angle1 = R_PointToAngle (bspcoord[check[0]], bspcoord[check[1]]);
angle2 = R_PointToAngle (bspcoord[check[2]], bspcoord[check[3]]);
return SafeCheckRange(angle2, angle1);
}
