Merge pull request #2230 from 3b1b/video-work

Misc. bug fixes

manimlib/shader_wrapper.py

@@ -446,6 +446,11 @@ class VShaderWrapper(ShaderWrapper):
                 color = texture(Texture, uv);
                 if(color.a == 0) discard;
 
+                if(color.a < 0){
+                    color.a = -color.a / (1.0 - color.a);
+                    color.rgb *= (color.a - 1);
+                }
+
                 // Counteract scaling in fill frag
                 color *= 1.06;
 

manimlib/shaders/textured_surface/frag.glsl

@@ -26,6 +26,7 @@ void main() {
         float alpha = smoothstep(-dark_shift, dark_shift, dp);
         color = mix(dark_color, color, alpha);
     }
+    if (color.a == 0) discard;
 
     frag_color = finalize_color(
         color,

requirements.txt

@@ -2,7 +2,7 @@ colour
 ipython>=8.18.0
 isosurfaces
 fontTools
-manimpango>=0.4.0.post0,<0.5.0
+manimpango>=0.6.0
 mapbox-earcut
 matplotlib
 moderngl