WebGL rendering of Ngon glyph#14044
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ianthomas23 merged 2 commits intobranch-3.6from Aug 28, 2024
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ianthomas23
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Aug 27, 2024
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| if (a_show < 0.5 || v_size.x < 0.0 || v_size.y < 0.0 || (v_size.x == 0.0 && v_size.y == 0.0) | ||
| #ifdef USE_NGON | ||
| || v_n < 3.0 |
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This line avoids attempting to render an Ngon with n<3. I have not added an explicit visual test for this.
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This should have been added in the original PR. In anycase, looks fine. In general, as long as the signature matches bokeh's Python API, then it should be fine. |
mattpap
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Aug 27, 2024
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Yup I just forgot about it, thanks for adding @ianthomas23 ! |
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This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs. |
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This implements WebGL rendering of the new Ngon glyph.
Here is the new visual test image, you can tell by the hatching pattern that WebGL is used on the right:
In terms of implementation I have moved most of the existing
CircleGLinto its new base classRadialGLwhich is also the base class for the newNgonGLclass. For the GLSL shaders I have reused the existing marker shaders adding a new marker type"ngon". This allows us to reuse the hatching, line joins, etc. The only thing not supported is line dashes, which is not supported for any of the markers.For the new visual test I've had to add a new
Figure.ngonfunction toglyph_api.ts. I haven't done this before so I've copied, pasted and modified thecirclecode for this. Someone with more experience of this should probably check that I have done this correctly.