Whimsy Wheels

• Built the full prototype solo: mechanics, physics and input.
• Focused on proving the draw-to-physics core loop rather than production polish, using free assets to mock up environments and hazards.

A three-step pipeline turns a drawing into a vehicle:

1. Drawing

• Captures the player's stroke in real time with LineRenderer, converting screen-space input into world-space points.
• Adds a new point only after a minimum distance, which keeps shapes stable and cheap to simulate.

2. Collider Generation

• When the stroke ends, places a CircleCollider2D on each key point of the line.
• Colliders are sized to the line width, so the physics matches what the player sees.
• Colliders are pooled and reused.

3. Simulation

• Snaps wheels to the start and end of the line.
• Switches the shape from kinematic to dynamic to start the 2D physics simulation.
• Drives the wheels with WheelJoint2D motors that only engage while touching the ground.

• Hybrid camera setup built on Cinemachine.
• A level pan before play shows the course layout, hazards and goal.
• Keeps unpredictable, player-made vehicles in frame during fast, chaotic physics.

• Hand-built levels from reusable prefabs: obstacles, ramps and boost pads.
• Difficulty paced to introduce each mechanic before testing it.
• Each environment is a self-contained prefab.
• A central progression container sets level order, independent of build indices.

• Unity's New Input System for position and press data.
• The same input code handles mouse and touch.
• Input handling is separate from the drawing logic, so the game works cross-platform.