Implement rest of LineSegment2D members.

include/J3ML/Geometry/LineSegment2D.hpp

@@ -135,7 +135,8 @@ namespace J3ML::Geometry
         /** @param d [out] If specified, this parameter receives the normalized distance along
                 this line segment which specifies the closest point on this line segment to
                 the specified point.
-            @return The distance between this line segment and the given object. */
+            @return The distance between this line segment and the given object.
+            @see */
         float Distance(const Vector2& point) const;
         float Distance(const Vector2& point, float& d) const;
 

src/J3ML/Geometry/LineSegment2D.cpp

@@ -121,3 +121,45 @@ Vector2 Geometry::LineSegment2D::ClosestPoint(const Geometry::LineSegment2D &oth
 
     return Vector2::Zero;
 }
+
+float Geometry::LineSegment2D::Distance(const Vector2 &point) const { float d; return Distance(point, d); }
+
+float Geometry::LineSegment2D::Distance(const Vector2 &point, float &d) const {
+    /// See Christer Ericson's Real-Time Collision Detection, p. 130.
+    Vector2 closestPoint = ClosestPoint(point, d);
+    return closestPoint.Distance(point);
+}
+
+float Geometry::LineSegment2D::Distance(const Geometry::LineSegment2D &other) const { float d, d2; return Distance(other, d, d2);}
+
+float Geometry::LineSegment2D::Distance(const Geometry::LineSegment2D &other, float &d) const { float d2; return Distance(other, d, d2); }
+
+float Geometry::LineSegment2D::Distance(const Geometry::LineSegment2D &other, float &d, float &d2) const {
+    ClosestPoint(other, d, d2);
+    return GetPoint(d).Distance(other.GetPoint(d2));
+}
+
+float Geometry::LineSegment2D::DistanceSq(const Geometry::LineSegment2D &other) const {
+    float d, d2;
+    ClosestPoint(other, d, d2);
+    return GetPoint(d).DistanceSq(other.GetPoint(d2));
+}
+
+float Geometry::LineSegment2D::DistanceSq(const Vector2 &point) const {
+    float d;
+    /// See Christer Ericson's Real-Time Collision Detection, p.130.
+    Vector2 closestPoint = ClosestPoint(point, d);
+    return closestPoint.DistanceSq(point);
+}
+
+bool Geometry::LineSegment2D::Intersects(const Geometry::LineSegment2D &lineSegment, float epsilon) const {
+    return Distance(lineSegment) <= epsilon;
+}
+
+void Geometry::LineSegment2D::ProjectToAxis(const Vector2 &direction, float &outMin, float &outMax) const {
+    outMin = Vector2::Dot(direction, A);
+    outMax = Vector2::Dot(direction, B);
+
+    if (outMax < outMin)
+        Swap(outMin, outMax);
+}