ShapeType

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	typedef enum {
	shape_unknown = 0,
	shape_circle,
	shape_rectangle,
	shape_polygon
	} ShapeType ;

	shape_circle
	The coordinates must have the form "x,y,r", where x and y are coordinates of the center of the circle, and r is the length of the radius.
	shape_rectangle
	The coordinates must have the form "x1,y1, x2,y2", where x1,y1 are the coordinates of the upper left corner and x2,y2 are the coordinates of the lower left corner.
	shape_polygon
	The coordinates must have the form "x1,y1, x2,y2 ... xn,yn", where each x,y pair is a point where two sides of the polygon meet. A polygon may have up to 100 sides.

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