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Conflicts: SConstruct miracle.config src/mgl/pather.cc src/mgl/regioner.cc src/mgl/regioner.h
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| call C:\Python27\Scripts\scons.bat %* | ||
| exit /B ERRORLEVEL |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,96 @@ | ||
| #include "Vector2.h" | ||
| #include "LineSegment2.h" | ||
| #include "Exception.h" | ||
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| namespace libthing { | ||
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| #ifndef SIGN | ||
| #define SIGN(x) ((x)>=0 ? 1 : -1) | ||
| #endif | ||
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| //#include "log.h" | ||
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| LineSegment2::LineSegment2() {} | ||
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| LineSegment2::LineSegment2(const LineSegment2& other) | ||
| : a(other.a), b(other.b) {} | ||
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| LineSegment2::LineSegment2(const Vector2 &a, const Vector2 &b) | ||
| : a(a), b(b) {} | ||
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| LineSegment2 & LineSegment2::operator=(const LineSegment2 & other) { | ||
| if (this != &other) { | ||
| a = other.a; | ||
| b = other.b; | ||
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| } | ||
| return *this; | ||
| } | ||
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| Scalar LineSegment2::squaredLength() const { | ||
| Vector2 l = b - a; | ||
| return l.squaredMagnitude(); | ||
| } | ||
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| Scalar LineSegment2::length() const { | ||
| Scalar l = squaredLength(); | ||
| l = sqrt(l); | ||
| return l; | ||
| } | ||
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| /** | ||
| * @returns a new LineSegment2, elongated to be normalized to a unit vector | ||
| */ | ||
| LineSegment2 LineSegment2::elongate(const Scalar& dist) const { | ||
| LineSegment2 segment(*this); | ||
| Vector2 l = segment.b - segment.a; | ||
| l.normalise(); | ||
| l *= dist; | ||
| segment.b += l; | ||
| return segment; | ||
| } | ||
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| /** | ||
| * @returns a new line segment. Of what, I don't know. Wasn't documented. | ||
| */ | ||
| LineSegment2 LineSegment2::prelongate(const Scalar& dist) const { | ||
| LineSegment2 segment(*this); | ||
| Vector2 l = segment.a - segment.b; | ||
| l.normalise(); | ||
| l *= dist; | ||
| segment.a += l; | ||
| return segment; | ||
| } | ||
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| bool LineSegment2::intersects(const LineSegment2& rhs) const { | ||
| libthing::Vector2 lhsvec = b - a; | ||
| libthing::Vector2 rhsvec = rhs.b - rhs.a; | ||
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| return SIGN((rhs.b - a).crossProduct(lhsvec)) != | ||
| SIGN((rhs.a - a).crossProduct(lhsvec)) && | ||
| SIGN((b - rhs.a).crossProduct(rhsvec)) != | ||
| SIGN((a - rhs.a).crossProduct(rhsvec)); | ||
| } | ||
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| Scalar LineSegment2::testLeft(const Vector2& point) const { | ||
| return (b.x - a.x) * (point.y - a.y) - (point.x - a.x) * (b.y - a.y); | ||
| } | ||
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| Scalar LineSegment2::testRight(const Vector2& point) const { | ||
| return (a.x - b.x) * (point.y - b.y) - (point.x - b.x) * (a.y - b.y); | ||
| } | ||
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| std::ostream& operator <<(std::ostream &os, | ||
| const LineSegment2& /*s*/) { | ||
| //os << "[ " << s.a << ", " << s.b << "]"; | ||
| return os; | ||
| } | ||
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| bool intersects(const LineSegment2& lhs, | ||
| const LineSegment2& rhs) { | ||
| return lhs.intersects(rhs); | ||
| } | ||
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| } | ||
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