Verify if a point is part of a line

Hi Pradnya,

Thanks for your inquiry. I am sorry for the late reply.
You can use our Coordinate Transformation API combined with Hit-Test API to check whether LineAnnotation lies on the RenderableSeries.

Please take a look at our documentation regarding Coordinate Transformation:
https://www.scichart.com/documentation/v5.x/webframe.html#Axis%20APIs%20-%20Convert%20Pixel%20to%20Data%20Coordinates.html

You should convert (X1, Y1), (X2, Y2) Annotation coordinates into pixel (raw) coordinates using the Coordinate Transformation API from this article.

Please also take a look at the documentation regarding RenderableSeries Hit-Test API:
https://www.scichart.com/documentation/v5.x/webframe.html#RenderableSeries%20Hit-Test%20API.html

And our “Hit-Test API” example:
https://www.scichart.com/example/wpf-chart-example-hit-test-api/

Hello,

Thank you for the reply. What I mean by a line is FastLineRenderableSeries. I don’t want user create an annotation with start and end points not linked to any line series.

Is there any way to verify it?

I have tried to extract points of a line from Dataseries of FastLineRenderableSeries, but it only contains data points but not the points linking the data points.

Hello

you can do it using math:

if you have a line, you can get 2 points from it

from these 2 points find y=f(x)

and later check all new points if they apply to that formula