Bug: do not allow drawing rockets with no aerodynamic surface (#774)

* DEV: add validation for aerodynamic surfaces in rocket plots

* MNT: add conditional check for aerodynamic surfaces before drawing rocket

* DEV: update CHANGELOG

Author: Gui-FernandesBR

CHANGELOG.md

@@ -40,6 +40,7 @@ Attention: The newest changes should be on top -->
 
 ### Fixed
 
+- BUG: do not allow drawing rockets with no aerodynamic surface [#774](https://github.com/RocketPy-Team/RocketPy/pull/774)
 - BUG: update flight simulation logic to include burn start time [#778](https://github.com/RocketPy-Team/RocketPy/pull/778)
 
 ## [v1.8.0] - 2025-01-20

rocketpy/plots/rocket_plots.py

@@ -212,6 +212,9 @@ def draw(self, vis_args=None, plane="xz", *, filename=None):
             eps, jpg, jpeg, pdf, pgf, png, ps, raw, rgba, svg, svgz, tif, tiff
             and webp (these are the formats supported by matplotlib).
         """
+
+        self.__validate_aerodynamic_surfaces()
+
         if vis_args is None:
             vis_args = {
                 "background": "#EEEEEE",
@@ -248,6 +251,12 @@ def draw(self, vis_args=None, plane="xz", *, filename=None):
         plt.tight_layout()
         show_or_save_plot(filename)
 
+    def __validate_aerodynamic_surfaces(self):
+        if not self.rocket.aerodynamic_surfaces:
+            raise ValueError(
+                "The rocket must have at least one aerodynamic surface to be drawn."
+            )
+
     def _draw_aerodynamic_surfaces(self, ax, vis_args, plane):
         """Draws the aerodynamic surfaces and saves the position of the points
         of interest for the tubes."""
@@ -399,6 +408,8 @@ def _draw_generic_surface(
 
     def _draw_tubes(self, ax, drawn_surfaces, vis_args):
         """Draws the tubes between the aerodynamic surfaces."""
+        radius = 0
+        last_x = 0
         for i, d_surface in enumerate(drawn_surfaces):
             # Draw the tubes, from the end of the first surface to the beginning
             # of the next surface, with the radius of the rocket at that point
@@ -670,9 +681,10 @@ def all(self):
         """
 
         # Rocket draw
-        print("\nRocket Draw")
-        print("-" * 40)
-        self.draw()
+        if len(self.rocket.aerodynamic_surfaces) > 0:
+            print("\nRocket Draw")
+            print("-" * 40)
+            self.draw()
 
         # Mass Plots
         print("\nMass Plots")