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Triangle markers that end on points rather than center on them #4935

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nicolaskruchten opened this issue Jun 22, 2020 · 2 comments · Fixed by #5010
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Triangle markers that end on points rather than center on them #4935

nicolaskruchten opened this issue Jun 22, 2020 · 2 comments · Fixed by #5010
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@archmoj
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@nicolaskruchten
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In order to make an "arrow chart" out of a scatter trace, we need to be able to have arrowhead/triangle markers whose extreme end is at the point, rather than markers centered on a point: right now if I want an arrow from 10 to 20, the tip of the triangle overshoots.

I propose we add four new markers arrowhead-* for this purpose.

image
@nicolaskruchten nicolaskruchten added this to the v1.55.0 milestone Jun 22, 2020
@nicolaskruchten nicolaskruchten added the feature something new label Jun 22, 2020
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nicolaskruchten commented Jun 22, 2020 •
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Hmm, possible complication: the end of the underlying line might peek through from behind.

@nicolaskruchten nicolaskruchten modified the milestones: v1.55.0, v1.56.0 Jun 22, 2020
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OK, as a compromise solution, let's come up with a "triangle to level" marker similar to this, so that the line won't show through as much unless the line thickness is disproportionately big compared to the marker size:

image

@nicolaskruchten nicolaskruchten modified the milestones: v1.56.0, v1.55.0 Jun 23, 2020
@nicolaskruchten nicolaskruchten removed this from the v1.55.0 milestone Jul 7, 2020
@archmoj archmoj self-assigned this Jul 20, 2020
@archmoj archmoj mentioned this issue Jul 22, 2020
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Implement horizontal and vertical markers for arrow charts plotly/plotly.js
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@nicolaskruchten @archmoj