Drawing arrows

Anonymous 5 years ago 0
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AnotherBor wrote at 2014-01-03 14:58:


I have a question about LineVisual3D.
Is there a way to add tiny arrow head at the end of the line segment(s)?

objo wrote at 2014-01-07 22:43:

I think this must be implemented in a new class similar to the LinesVisual3D. Each segment should then be defined by 3 triangles, and the 3 extra coordinates should be calculated a similar way as in LineGeometryBuilder.CreatePositions

AnotherBor wrote at 2014-01-08 02:18:

Yeah I figured that out but was just hoping so much that you say something like "there is this innocent looking property which you could use to..." :D
I checked how LineGeometryBuilder does the computations and it's beyond what I can tackle in my time frame allotted for this.

a5r wrote at 2014-01-08 22:21:

Petzold line class has this functionality. Maybe you can reuse it for your own needs.

AnotherBor wrote at 2014-01-09 04:45:

Yes it is an option but if I remember well Petzold line class is about 25% slower than Helix (with lines only, compared in the PointsAndLinesDemo by looking at the FPS counter).
I will try it out if arrows become a must in my project. For now lines are ok.

everytimer wrote at 2014-07-21 09:19:

Could someone provide an example using Petzold line to display a visual arrow? Thank you very much