iOS Check inside polygon

[xArtx]

Hi,
I can look elsewhere for C code,
but I'm wondering if iOS has a way to check inside a path used to
draw polygons with Quartz2d.

I have saved all of the screen coordinates in the path,
so I can do something with them after the polygon is drawn to screen.
Cheers, Art.

 

[xStep]

Assuming you have a Path, see the documentation for CGPathContainsPoint.

 

[xArtx]

Assuming you have a Path, see the documentation for CGPathContainsPoint.

Awesome! 5 minutes to get it working. Don't even have to save coordinates
that make up the polygon, just check it before you fill the path:

    CGContextAddLineToPoint(context, sscreenx, sscreeny);
    
    if (isnp == 1) {
    bool shapeContainsPoint = CGContextPathContainsPoint(context, cPoint, kCGPathFillStroke );
    if (shapeContainsPoint == TRUE) {inboundsnp = 1;}
    } // isnp
        
    CGContextFillPath(context);

Sure beats virtually drawing the polygon again just to hit test it, Thanks