mirror of
https://github.com/ZDoom/qzdoom-gpl.git
synced 2024-12-02 08:22:25 +00:00
97 lines
2.4 KiB
C++
97 lines
2.4 KiB
C++
// Emacs style mode select -*- C++ -*-
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// $Id:$
|
|
//
|
|
// Copyright (C) 1993-1996 by id Software, Inc.
|
|
//
|
|
// This source is available for distribution and/or modification
|
|
// only under the terms of the DOOM Source Code License as
|
|
// published by id Software. All rights reserved.
|
|
//
|
|
// The source is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
|
|
// for more details.
|
|
//
|
|
// $Log:$
|
|
//
|
|
// DESCRIPTION:
|
|
// Main loop menu stuff.
|
|
// Random number LUT.
|
|
// Default Config File.
|
|
// PCX Screenshots.
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include "m_bbox.h"
|
|
#include "p_local.h"
|
|
#include "p_maputl.h"
|
|
|
|
//==========================================================================
|
|
//
|
|
//
|
|
//
|
|
//==========================================================================
|
|
|
|
void FBoundingBox::AddToBox (const DVector2 &pos)
|
|
{
|
|
if (pos.X < m_Box[BOXLEFT])
|
|
m_Box[BOXLEFT] = pos.X;
|
|
if (pos.X > m_Box[BOXRIGHT])
|
|
m_Box[BOXRIGHT] = pos.X;
|
|
|
|
if (pos.Y < m_Box[BOXBOTTOM])
|
|
m_Box[BOXBOTTOM] = pos.Y;
|
|
if (pos.Y > m_Box[BOXTOP])
|
|
m_Box[BOXTOP] = pos.Y;
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// FBoundingBox :: BoxOnLineSide
|
|
//
|
|
// Considers the line to be infinite
|
|
// Returns side 0 or 1, -1 if box crosses the line.
|
|
//
|
|
//==========================================================================
|
|
|
|
int FBoundingBox::BoxOnLineSide (const line_t *ld) const
|
|
{
|
|
int p1;
|
|
int p2;
|
|
|
|
if (ld->Delta().X == 0)
|
|
{ // ST_VERTICAL
|
|
p1 = m_Box[BOXRIGHT] < ld->v1->fX();
|
|
p2 = m_Box[BOXLEFT] < ld->v1->fX();
|
|
if (ld->Delta().Y < 0)
|
|
{
|
|
p1 ^= 1;
|
|
p2 ^= 1;
|
|
}
|
|
}
|
|
else if (ld->Delta().Y == 0)
|
|
{ // ST_HORIZONTAL:
|
|
p1 = m_Box[BOXTOP] > ld->v1->fY();
|
|
p2 = m_Box[BOXBOTTOM] > ld->v1->fY();
|
|
if (ld->Delta().X < 0)
|
|
{
|
|
p1 ^= 1;
|
|
p2 ^= 1;
|
|
}
|
|
}
|
|
else if ((ld->Delta().X * ld->Delta().Y) >= 0)
|
|
{ // ST_POSITIVE:
|
|
p1 = P_PointOnLineSide (m_Box[BOXLEFT], m_Box[BOXTOP], ld);
|
|
p2 = P_PointOnLineSide (m_Box[BOXRIGHT], m_Box[BOXBOTTOM], ld);
|
|
}
|
|
else
|
|
{ // ST_NEGATIVE:
|
|
p1 = P_PointOnLineSide (m_Box[BOXRIGHT], m_Box[BOXTOP], ld);
|
|
p2 = P_PointOnLineSide (m_Box[BOXLEFT], m_Box[BOXBOTTOM], ld);
|
|
}
|
|
|
|
return (p1 == p2) ? p1 : -1;
|
|
}
|
|
|