MGL_ellipseArcEngine

Generates the set of points on an elliptical arc.

Declaration

void MGLAPI MGL_ellipseArcEngine(
rect_t extentRect,
int startAngle,
int endAngle,
arc_coords_t *ac,
void (MGLAPIP plotPoint)(
long x,
long y))

Prototype In

mgraph.h

Parameters

extentRect | Bounding rectangle defining the arc
startAngle | Starting angle for arc (in degrees)
endAngle | Ending angle for arc (in degrees)
ac | Place to store computed arc coordinates
plotPoint | Function to call for every point on the elliptical arc

Description

This routine generates the set of points on a elliptical arc, and is the same code used to generate elliptical arcs internally in MGL. You can call it to generate the set of points on an elliptical arc, calling your own plotPoint routine for every point on the arc. The points on the arc are rasterized in order from the starting angle to the ending angle. After the arc has been drawn, the arc coordinates are returned, which contains the actual center, starting and ending points for the arc.

See Also

MGL_ellipseEngine, MGL_lineEngine

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