MapData* getOrCreateDataForKey(void* key);
MapData* createDataForKey(void* key);
void setAnchorForKey(void* key, const SGVec2d& anchor);
+ void clearData();
SGVec2d project(const SGGeod& geod) const;
SGGeod unproject(const SGVec2d& p) const;
double currentScale() const;
+ int displayHeading(double trueHeading) const;
+
void circleAt(const SGVec2d& center, int nSides, double r);
void circleAtAlt(const SGVec2d& center, int nSides, double r, double r2);
void drawLine(const SGVec2d& p1, const SGVec2d& p2);