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Check for crossing segments before axlDBCreateShape

Ejlersen

Hi

I'm reading in a file to create a shape, my problem is that if the shape is selfcrossing then I'll get an error

E- (SPMHDB-187): SHAPE boundary may not cross itself.

This terminates the program, so is there a way to check if a path is crossing itself before committing it to axlDBCreateShape so that I can avoid the program from terminating.

If so, is there a way to detect the coordinates for the issue and maybe even get it to heal it self?

Best regards

Ole

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  •  Intriguing question.  the "grunt" method would be to step through each segment making up the exterior of the shape and seeing if it touches or crosses any other segment. You could speed up the process by recursively snipping off a segment to test against remaining elements of the segment lis.  axlLineXLine could be of some use.

     

    Good Luck,

     

    Chris Walters

    still hanging around

Reply

  •  Intriguing question.  the "grunt" method would be to step through each segment making up the exterior of the shape and seeing if it touches or crosses any other segment. You could speed up the process by recursively snipping off a segment to test against remaining elements of the segment lis.  axlLineXLine could be of some use.

     

    Good Luck,

     

    Chris Walters

    still hanging around

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