mirror of
https://github.com/scummvm/scummvm.git
synced 2025-04-02 10:52:32 -04:00
97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
|
|
*
|
|
* ScummVM is the legal property of its developers, whose names
|
|
* are too numerous to list here. Please refer to the COPYRIGHT
|
|
* file distributed with this source distribution.
|
|
*
|
|
* Additional copyright for this file:
|
|
* Copyright (C) 1999-2000 Revolution Software Ltd.
|
|
* This code is based on source code created by Revolution Software,
|
|
* used with permission.
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef ICB_PX2DLINE_H_INCLUDED
|
|
#define ICB_PX2DLINE_H_INCLUDED
|
|
|
|
#include "engines/icb/common/px_array.h"
|
|
#include "engines/icb/common/px_2drealpoint.h"
|
|
|
|
namespace ICB {
|
|
|
|
// Note, this header file needs somethings :
|
|
// e.g. PXreal, REAL_ZERO
|
|
#ifndef REAL_ZERO
|
|
#error "REAL_ZERO not defined in px2drealline.h"
|
|
#endif // #ifndef REAL_ZERO
|
|
|
|
// Here I define an array type for the class. This neatens syntax and also allows pxArrays of pxArrays to be declared.
|
|
class px2DRealLine;
|
|
typedef rcActArray<px2DRealLine> px2DRealLineArray;
|
|
|
|
// Holds a line on a plane as a pair of integer endpoints, and provides functions for working with them.
|
|
class px2DRealLine {
|
|
public:
|
|
// Definitions for this class.
|
|
enum IntersectionLogicVal { DONT_INTERSECT, DO_INTERSECT, COLLINEAR };
|
|
|
|
// Default constructor and destructor.
|
|
inline px2DRealLine() {
|
|
m_fX1 = REAL_ZERO;
|
|
m_fY1 = REAL_ZERO;
|
|
m_fX2 = REAL_ZERO;
|
|
m_fY2 = REAL_ZERO;
|
|
}
|
|
inline ~px2DRealLine() { ; }
|
|
|
|
// Gets and sets.
|
|
PXreal GetX1() const { return m_fX1; }
|
|
PXreal GetY1() const { return m_fY1; }
|
|
PXreal GetX2() const { return m_fX2; }
|
|
PXreal GetY2() const { return m_fY2; }
|
|
|
|
void SetX1(PXreal fX1) { m_fX1 = fX1; }
|
|
void SetY1(PXreal fY1) { m_fY1 = fY1; }
|
|
void SetX2(PXreal fX2) { m_fX2 = fX2; }
|
|
void SetY2(PXreal fY2) { m_fY2 = fY2; }
|
|
|
|
// This determines whether this-> line intersects another.
|
|
IntersectionLogicVal Intersects(const px2DRealLine &oLineB, px2DRealPoint &oIntersection) const;
|
|
|
|
private:
|
|
PXreal m_fX1, m_fY1, m_fX2, m_fY2; // The line's endpoints.
|
|
|
|
// Functions used only by this class.
|
|
inline bool8 SameSigns(PXreal dA, PXreal dB) const;
|
|
};
|
|
|
|
inline bool8 px2DRealLine::SameSigns(PXreal fA, PXreal fB) const {
|
|
if (fA < REAL_ZERO) {
|
|
if (fB < REAL_ZERO)
|
|
return TRUE8;
|
|
else
|
|
return FALSE8;
|
|
} else {
|
|
if (fB < REAL_ZERO)
|
|
return FALSE8;
|
|
else
|
|
return TRUE8;
|
|
}
|
|
}
|
|
|
|
} // End of namespace ICB
|
|
|
|
#endif // #ifndef PX2DLINE_H_INCLUDED
|