In 3D scene: Click/Tap & Drag on ball to aim & set kick strength.
Speed: 0.00 m/s
Angular Speed: 0.00 rad/s
Position: (0.00, 0.00, 0.00)
Peak Height: 0.00 m
Air Time: 0.00 s
Bounces: 0
Game Overview and Instructions
Welcome to the 3D Ball Kick Physics Game! This is an interactive simulation where you can experience the
physics of kicking different types of balls. Choose your ball, decide where to strike it for spin, aim, and
set your kick strength to send it flying across the field. The ball is now contained within a smaller,
semi-transparent room (25x25x10 units).
How to Play
Select Ball Type: Use the "Ball Type" dropdown in the controls overlay (top-left)
to
choose from a Soccer Ball, Basketball, Bowling Ball, or Tennis Ball. Each ball has different
physical
properties (mass, bounciness, friction).
Set Impact Point (for Spin):
Below the ball type selector, you'll find a circular "Impact Point Selector." This 2D circle
represents the surface of the ball you're about to kick.
Click anywhere on this circle. A red marker will indicate your chosen impact point.
Kicking the center of this circle results in a straighter kick with minimal spin.
Kicking off-center (e.g., to the left/right or top/bottom of the marker) will impart spin
(sidespin, topspin, backspin) to the ball.
Aim and Kick Strength:
In the main 3D game window, click (or tap on touch devices) and hold on the 3D ball.
Drag your mouse/finger away from the ball. A red line will appear, showing the direction and
power of your kick.
The further you drag, the stronger the kick will be. The length of this red
line directly corresponds to the kick strength.
Release the mouse button (or lift your finger) to kick the ball.
Observe Physics: Watch how the ball flies, bounces, and rolls within the confines
of
the visible room. The "Parameter Display" (top-right) shows real-time data like speed, angular
(rotational) speed, position, peak height, air time, and bounce count.
Reset Ball: Click the "Reset Ball" button in the controls overlay to return the
ball to
its starting position for another kick.
Technical Details
This game is built using the following web technologies:
HTML: Structures the game page and UI elements.
CSS: Styles the UI elements for a clean and responsive layout.
JavaScript: Handles all game logic, user interactions, and updates.
Three.js: A 3D graphics library used to render the scene, ball, ground, and
lighting.
The room boundaries are now visualized with semi-transparent meshes.
Cannon.js: A lightweight 3D physics engine used to simulate realistic ball
movement,
collisions, friction, restitution (bounciness), and the effects of applying forces and torques (for
spin). The simulation includes boundary walls.
Key physics concepts implemented:
Impulse: The kick is applied as an impulse (a large force over a short time) to the
ball's physics body.
Torque: Applying the impulse off-center (based on the "Impact Point Selector")
creates
torque, causing the ball to spin.
Material Properties: Different balls have varying mass, friction, and restitution,
affecting how they react to kicks and interact with the ground and walls.
Damping: Linear and angular damping are applied to simulate air resistance and
energy
loss.
Static Collision Bodies: Invisible planes are used as static bodies in Cannon.js to
create the walls and ceiling of the containment area, now accompanied by visual meshes.
Future Directions
Potential enhancements for this game could include:
Target "Bowls" or Goals: Adding specific targets to aim for, introducing scoring
mechanics.
More Ball Textures: Detailed textures for all ball types to improve visual realism.
Wind Effects: Simulating wind that could affect the ball's trajectory.
Adjustable Camera Angles: Allowing users to change the camera view (e.g., top-down,
follow-cam).
Sound Effects: Adding sounds for kicks, bounces, and achieving goals.
Textured Walls/Room: Applying textures to the visible walls for a more detailed
environment.
Enjoy experimenting with the physics of kicking balls in this interactive 3D environment!