[Rendering] Add ellipse (#123)

Author: matteobettini

vmas/simulator/rendering.py

@@ -521,10 +521,16 @@ def render_function_util(
 
 
 def make_circle(radius=10, res=30, filled=True, angle=2 * math.pi):
+    return make_ellipse(
+        radius_x=radius, radius_y=radius, res=res, filled=filled, angle=angle
+    )
+
+
+def make_ellipse(radius_x=10, radius_y=5, res=30, filled=True, angle=2 * math.pi):
     points = []
     for i in range(res):
         ang = -angle / 2 + angle * i / res
-        points.append((math.cos(ang) * radius, math.sin(ang) * radius))
+        points.append((math.cos(ang) * radius_x, math.sin(ang) * radius_y))
     if angle % (2 * math.pi) != 0:
         points.append((0, 0))
     if filled: