In opengl the polygram example shows some corners are not rendered correctly when the width is increased. This may point to an issue in the shaders.
Expected behavior
Six even corners in the hexagon
How to reproduce the issue
Set the renderer to opengl
Code for reproducing the problem
```py
class PolygramExample(Scene):
def construct(self):
hexagram = Polygram(
[[0, 2, 0], [-np.sqrt(3), -1, 0], [np.sqrt(3), -1, 0]],
[[-np.sqrt(3), 1, 0], [0, -2, 0], [np.sqrt(3), 1, 0]], stroke_width=20.
)
self.add(hexagram)
```
It only seems to cause an issue with two groups of vertices, rendering only one group results in a triangle with all corners connected correctly.
Terminal output
```
PASTE HERE OR PROVIDE LINK TO https://pastebin.com/ OR SIMILAR
```
System specifications
System Details
- OS (with version, e.g., Windows 10 v2004 or macOS 10.15 (Catalina)):
- RAM:
- Python version (`python/py/python3 --version`):
- Installed modules (provide output from `pip list`):
```
PASTE HERE
```
LaTeX details
+ LaTeX distribution (e.g. TeX Live 2020):
+ Installed LaTeX packages:
FFMPEG
Output of `ffmpeg -version`:
```
PASTE HERE
```
Yep because we do not have a polyline shader. So we are not able to choose between the different cap modes that are normally supported in cairo. Instead we just get seperate bezier curves forming a shape.
Description of bug / unexpected behavior
In opengl the polygram example shows some corners are not rendered correctly when the width is increased. This may point to an issue in the shaders.
Expected behavior
Six even corners in the hexagon
How to reproduce the issue
Set the renderer to opengl
Code for reproducing the problem
```py class PolygramExample(Scene): def construct(self): hexagram = Polygram( [[0, 2, 0], [-np.sqrt(3), -1, 0], [np.sqrt(3), -1, 0]], [[-np.sqrt(3), 1, 0], [0, -2, 0], [np.sqrt(3), 1, 0]], stroke_width=20. ) self.add(hexagram) ``` It only seems to cause an issue with two groups of vertices, rendering only one group results in a triangle with all corners connected correctly.Additional media files
Images/GIFs
**Cairo Render** ![PolygramExample_ManimCE_v0 15 2](https://user-images.githubusercontent.com/32387857/177408138-289a343c-5768-4e2e-b8c5-498ee8abefda.png) **Opengl Render** ![PolygramExample_ManimCE_v0 15 2](https://user-images.githubusercontent.com/32387857/177408243-b22240cd-42b2-461b-bfab-a5043ad407ea.png) **Opengl Render Wireframe (with blending disabled)** ![PolygramExample_ManimCE_v0 15 2](https://user-images.githubusercontent.com/32387857/177408399-523f1ce7-0a84-40f1-848d-e137bfddc82e.png)Logs
Terminal output
``` PASTE HERE OR PROVIDE LINK TO https://pastebin.com/ OR SIMILAR ```System specifications
System Details
- OS (with version, e.g., Windows 10 v2004 or macOS 10.15 (Catalina)): - RAM: - Python version (`python/py/python3 --version`): - Installed modules (provide output from `pip list`): ``` PASTE HERE ```LaTeX details
+ LaTeX distribution (e.g. TeX Live 2020): + Installed LaTeX packages:FFMPEG
Output of `ffmpeg -version`: ``` PASTE HERE ```Additional comments