#pragma region CPL License
/*
Nuclex Native Framework
Copyright (C) 2002-2015 Nuclex Development Labs
This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.
This library 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
IBM Common Public License for more details.
You should have received a copy of the IBM Common Public
License along with this library
*/
#pragma endregion // CPL License
#ifndef NUCLEX_GEOMETRY_LINES_TRACERS_LINE2TRACER_H
#define NUCLEX_GEOMETRY_LINES_TRACERS_LINE2TRACER_H
#include "Nuclex/Geometry/Config.h"
#include "Nuclex/Geometry/Lines/Line2.h"
#include "Nuclex/Geometry/LineContacts.h"
namespace Nuclex { namespace Geometry { namespace Lines { namespace Tracers {
// ------------------------------------------------------------------------------------------- //
/// Determines contacts between lines
template
class Line2Tracer {
/// Determines where a line crosses another line
/// Line whose time of crossing will be determined
/// Other line that might be crossed
/// The time at which the line crosses the other line
public: static LineContacts FindLineContacts(
const Lines::Line2 &line, const Lines::Line2 &otherLine
) {
float perpendicularDot =
(line.Direction.X * otherLine.Direction.Y) -
(line.Direction.Y * otherLine.Direction.X);
if(perpendicularDot == 0) {
return LineContacts::None;
}
Vector2 offset = otherLine.Origin - line.Origin;
float t = (offset.X * otherLine.Direction.Y - offset.Y * otherLine.Direction.X);
t /= perpendicularDot;
return LineContacts(t, t);
}
};
// ------------------------------------------------------------------------------------------- //
}}}} // namespace Nuclex::Geometry::Lines::Tracers
#endif // NUCLEX_GEOMETRY_LINES_TRACERS_LINE2TRACER_H