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P5-gd-arrow
Jul 20, 2023
Draw arrows using GD
This is a subclass of GDPolygon used to draw an arrow between two vertices.
GDArrowFull draws a full arrow between two verticies.
|\
+----------------------+ \ X2, Y2 * * X1, Y1
+----------------------+ /
|/
GDArrowRightHalf draws a half arrow between two verticies.
X2, Y2 ————————- X1, Y1 +———————-+ / |/
GDArrowLeftHalf draws a half arrow between two verticies.
|\
+----------------------+ \ X2, Y2 *-------------------------* X1, Y1
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