Add check on gl_PointCoords before applying circular mask for point rendering

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 
 ### Added
+* Added a check before applying circular mask on points to be rendered, because with some drivers, gl_PointCoords can be invalid and thus no point is rendered (problem detected on Fedora 43 with intel igpu)
 
 ### Changed
 

src/compas_viewer/renderer/shaders/model.frag

@@ -49,11 +49,15 @@ void main() {
         alpha = max(alpha, 0.5);
     }
 
-    // Draw circular points
+    // Draw circular points if gl_PointCoord allows
     if (element_type == 0) {
-        vec2 center = gl_PointCoord - vec2(0.5);
-        if (length(center) > 0.5) {
-            discard;
+
+        // Only apply mask if gl_PointCoord is valid
+        if (gl_PointCoord.x > 1e-5 || gl_PointCoord.y > 1e-5){
+            vec2 center = gl_PointCoord - vec2(0.5);
+            if (length(center) > 0.5) {
+                discard;
+            }
         }
     }