Fixes #896 : Fixed getVertexCount() method issue of giving output 0 for GROUP shapes

core/src/processing/core/PShape.java

@@ -2346,7 +2346,7 @@ protected void setPath(int vcount, float[][] verts, int ccount, int[] codes) {
    * @see PShape#setVertex(int, float, float)
    */
   public int getVertexCount() {
-    if (family == GROUP || family == PRIMITIVE) {
+    if (family == PRIMITIVE) {
       PGraphics.showWarning(NO_VERTICES_ERROR);
     }
     return vertexCount;

core/src/processing/opengl/PShapeOpenGL.java

@@ -1635,30 +1635,38 @@ protected void curveVertexImpl(float x, float y, float z) {
 
   @Override
   public int getVertexCount() {
-    if (family == GROUP) return 0; // Group shapes don't have vertices
-    else {
+     int count = 0;
+    // If the shape is a group, recursively count the vertices of its children
+    if (family == GROUP) {
+      // Iterate through all the child shapes and count their vertices
+      for (int i = 0; i < getChildCount(); i++) {
+        count += getChild(i).getVertexCount();  // Recursive call to get the vertex count of child shapes
+      }
+    } else {
       if (root.tessUpdate) {
         if (root.tessKind == TRIANGLES) {
-          return lastPolyVertex - firstPolyVertex + 1;
+          count += lastPolyVertex - firstPolyVertex + 1;
         } else if (root.tessKind == LINES) {
-          return lastLineVertex - firstLineVertex + 1;
+          count += lastLineVertex - firstLineVertex + 1;
         } else if (root.tessKind == POINTS) {
-          return lastPointVertex - firstPointVertex + 1;
+          count += lastPointVertex - firstPointVertex + 1;
         } else {
-          return 0;
+          count += 0; // Handle other cases
         }
       } else {
         if (family == PRIMITIVE || family == PATH) {
           // the input geometry of primitive and path shapes is built during
           // tessellation
           updateTessellation();
         }
-        return inGeo.vertexCount;
+        count += inGeo.vertexCount;
       }
     }
+    return count;
   }
 
 
+
   @Override
   public PVector getVertex(int index, PVector vec) {
     if (vec == null) vec = new PVector();