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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_GFX_LINE_H_
#define MOZILLA_GFX_LINE_H_
#include "Types.h"
#include "Point.h"
namespace mozilla {
namespace gfx {
/**
* This struct defines a line in standard form:
*
* Ax + By = C
*/
struct Line {
Float A, B, C;
// Constructors
Line() : A(0), B(0), C(0) {}
Line(Float aA, Float aB, Float aC) : A(aA), B(aB), C(aC) {}
Line(const Point& aPt1, const Point& aPt2)
: A(aPt1.y - aPt2.y)
, B(aPt2.x - aPt1.x)
, C(A * aPt1.x + B * aPt1.y)
{}
Line operator -()
{
return Line(-A, -B, -C);
}
};
}
}
#endif /* MOZILLA_GFX_LINE_H_ */