- Genre: Sports
- Available Scripts
- sports_ball_physics.gd
- Expert ball physics with drag, magnus effect (curve), and proper bounce handling.
- Core Loop
- Possession
-
- Player or AI controls the ball/puck
- Maneuver
-
- Player avoids opponents (dribble, pass)
- Strike
-
- Player attempts to score (shoot, dunk)
- Defend
-
- Opposing team tries to steal or block
- Score
- Points determine winner after time NEVER Do in Sports Games NEVER parent ball to player transform — Ball must be physics-based, not child node. Parenting = magnetic stick feel, unrealistic. Use apply_central_impulse() for dribble touches. NEVER make all AI chase the ball — Kindergarten soccer problem. Use formation slots: only 1-2 players press ball, others cover space/mark opponents. NEVER use perfect instant goalkeeper reflexes — Add reaction time delay (0.2-0.5s) and error rate based on shot speed. Instant = unfair, frustrating. NEVER ignore animation root motion for player movement — Sports need realistic momentum/turning. Teleporting to animation end position breaks feel. Use AnimationTree root motion. NEVER use single collision shape for player body — Head, torso, legs need separate hitboxes for realistic ball contact (headers vs foot shots). NEVER allow ball to clip through goalposts — Use Continuous CD ( continuous_cd ) for fast-moving ball. Standard discrete physics = tunneling at high speeds. Skill Chain Phase Skills Purpose 1. Physics physics-bodies , vehicle-wheel-3d Ball bounce, friction, player collisions 2. AI steering-behaviors , godot-state-machine-advanced Formations, marking, flocking 3. Anim godot-animation-tree-mastery Blended running, shooting, tackling 4. Input input-mapping Contextual buttons (Pass/Tackle share button) 5. Camera godot-camera-systems Dynamic broadcast view, zooming on action Architecture Overview 1. The Ball (Physics Core) The most important object. Must feel right.
ball.gd
extends RigidBody3D @ export var drag_coefficient : float = 0.5 @ export var magnus_effect_strength : float = 2.0 func _integrate_forces ( state : PhysicsDirectBodyState3D ) -> void :
Apply Air Drag
var velocity = state . linear_velocity var speed = velocity . length ( ) var drag_force = - velocity . normalized ( ) * ( drag_coefficient * speed * speed ) state . apply_central_force ( drag_force )
Magnus Effect (Curve)
var spin = state . angular_velocity var magnus_force = spin . cross ( velocity ) * magnus_effect_strength state . apply_central_force ( magnus_force ) 2. Team AI (Formations) AI players don't just run at the ball. They run to positions relative to the ball/field.
team_manager.gd
extends Node enum Strategy { ATTACK , DEFEND } var current_strategy : Strategy = Strategy . DEFEND var formation_slots : Array [ Node3D ]
Markers parented to a "Formation Anchor"
func update_tactics ( ball_pos : Vector3 ) -> void :
Move the entire formation anchor
formation_anchor . position = lerp ( formation_anchor . position , ball_pos , 0.5 )
Assign best player to each slot
for player in players : var best_slot = find_closest_slot ( player ) player . set_target ( best_slot . global_position ) 3. Match Manager The referee logic.
match_manager.gd
- var
- score_team_a
- :
- int
- =
- 0
- var
- score_team_b
- :
- int
- =
- 0
- var
- match_timer
- :
- float
- =
- 300.0
- enum
- State
- {
- KICKOFF
- ,
- PLAYING
- ,
- GOAL
- ,
- END
- }
- func
- goal_scored
- (
- team
- :
- int
- )
- ->
- void
- :
- if
- team
- ==
- 0
- :
- score_team_a
- +=
- 1
- else
- :
- score_team_b
- +=
- 1
- current_state
- =
- State
- .
- GOAL
- play_celebration
- (
- )
- await
- get_tree
- (
- )
- .
- create_timer
- (
- 5.0
- )
- .
- timeout
- reset_positions
- (
- )
- current_state
- =
- State
- .
- KICKOFF
- Key Mechanics Implementation
- Contextual Input
- "A" button does different things depending on context.
- func
- _unhandled_input
- (
- event
- :
- InputEvent
- )
- ->
- void
- :
- if
- event
- .
- is_action_pressed
- (
- "action_main"
- )
- :
- if
- has_ball
- :
- pass_ball
- (
- )
- elif
- is_near_ball
- :
- slide_tackle
- (
- )
- else
- :
- switch_player
- (
- )
- Steering Behaviors
- For natural movement (Seek, Flee, Arrive).
- func
- seek
- (
- target_pos
- :
- Vector3
- )
- ->
- Vector3
- :
- var
- desired_velocity
- =
- (
- target_pos
- -
- global_position
- )
- .
- normalized
- (
- )
- *
- max_speed
- var
- steering
- =
- desired_velocity
- -
- velocity
- return
- steering
- .
- limit_length
- (
- max_force
- )
- Godot-Specific Tips
- NavigationServer3D
-
- Essential for avoiding obstacles (other players/referee).
- AnimationTree (BlendSpace2D)
-
- Crucial for sports. You need smooth blending between Idle -> Walk -> Jog -> Sprint in all directions.
- PhysicsMaterial
-
- Tune
- bounce
- and
- friction
- on the Ball and Field colliders carefully.
- Common Pitfalls
- AI Bunching
-
- All 22 players running at the ball (Kindergarten Soccer).
- Fix
-
- Use Formation Slots. Only 1-2 players "Press" the ball; others cover space.
- Magnetic Ball
-
- Ball sticks to player too perfectly.
- Fix
-
- Use a "Dribble" mechanic where the player kicks the ball slightly ahead physics-wise, rather than parenting it.
- Unfair Goalies
-
- Goalie reacts instantly.
- Fix
- Add a "Reaction Time" delay and "Error Rate" based on shot speed/stats. Reference Master Skill: godot-master