2D Top-Down Physics Car

Simulate top-down car motion with drifting.

Authors and contributors to this experimental extension: D8H.

Simulate car motion, from a top-down view, with the 2D Physics Engine behavior.

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Physics car

Simulate 2D car motion, from a top-down view.

Behavior properties

Acceleration (🔢 Number, Acceleration). Default value is 500.
Front wheels position (🔢 Number). 0 means at the center, 1 means at the front. Default value is 0.8.
Rear wheels position (🔢 Number, Dimensionless). 0 means at the center, 1 means at the back. Default value is 0.8.
Maximum speed (🔢 Number, Speed). Default value is 800.
Maximum steering angle (🔢 Number, Angle). Default value is 30.
Sterring speed when turning back (🔢 Number, Angular speed). Default value is 240.
Steering speed (🔢 Number, Angular speed). Default value is 50.
Wheel grip ratio (from 0 to 1) (🔢 Number, Dimensionless). A ratio of 0 is like driving on ice. Default value is 0.5.

See internal technical details

Acceleration is stored as Acceleration (Number). Unit is PixelAcceleration. Default value is 500.
Front wheels position is stored as FrontWheelsPosition (Number). Default value is 0.8.

This behavior must be used on an object also having a behavior with type "Physics2::Physics2Behavior". This is stored on property Physics2.
Rear wheels position is stored as RearWheelsPosition (Number). Unit is Dimensionless. Default value is 0.8.
Maximum speed is stored as SpeedMax (Number). Unit is PixelSpeed. Default value is 800.
Maximum steering angle is stored as SteeringAngleMax (Number). Unit is DegreeAngle. Default value is 30.
Sterring speed when turning back is stored as SteeringBackSpeed (Number). Unit is AngularSpeed. Default value is 240.
Steering speed is stored as SteeringSpeed (Number). Unit is AngularSpeed. Default value is 50.
Wheel grip ratio (from 0 to 1) is stored as WheelGripRatio (Number). Unit is Dimensionless. Default value is 0.5.

Behavior actions

Draw forces for debug
Draw forces applying on the car for debug purpose.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2 (👾 Object): Shape painter

Technical note: parameter 3 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::DrawDebug.

Acceleration
Change the acceleration of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Operator
Parameter 3 (🔢 Number): Value

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SetAcceleration.

Maximum speed
Change the maximum speed of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Operator
Parameter 3 (🔢 Number): Value

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SetSpeedMax.

Steering angle
Change the steering angle of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Operator
Parameter 3 (🔢 Number): Value

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SetSteeringAngle.

Maximum steering angle
Change the maximum steering angle of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Operator
Parameter 3 (🔢 Number): Value

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SetSteeringAngleMax.

Sterring back speed
Change the sterring speed when turning back of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Operator
Parameter 3 (🔢 Number): Value

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SetSteeringBackSpeed.

Steering speed
Change the steering speed of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Operator
Parameter 3 (🔢 Number): Value

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SetSteeringSpeed.

Wheel grip ratio
Change the wheel grip ratio of the object (from 0 to 1). A ratio of 0 is like driving on ice.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Operator
Parameter 3 (🔢 Number): Value

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SetWheelGripRatio.

Simulate acceleration stick
Simulate an acceleration stick for a given axis force.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2 (🔢 Number): Stick force

Technical note: parameter 3 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SimulateAccelerationStick.

Simulate down key press
Simulate a press of the down key.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior

Technical note: parameter 2 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SimulateDownKey.

Simulate left key press
Simulate a press of the left key.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior

Technical note: parameter 2 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SimulateLeftKey.

Simulate right key press
Simulate a press of the right key.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior

Technical note: parameter 2 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SimulateRightKey.

Simulate steering stick
Simulate a steering stick for a given axis force.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2 (🔢 Number): Stick force

Technical note: parameter 3 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SimulateSteeringStick.

Simulate up key press
Simulate a press of the up key.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior

Technical note: parameter 2 is an internal parameter handled by GDevelop.

Technical note: this action internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SimulateUpKey.

Behavior conditions

Acceleration
Compare the acceleration of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Relational operator
Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this condition internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::Acceleration.

Maximum speed
Compare the maximum speed of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Relational operator
Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this condition internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SpeedMax.

Steering angle
Compare the steering angle of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Relational operator
Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this condition internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SteeringAngle.

Maximum steering angle
Compare the maximum steering angle of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Relational operator
Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this condition internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SteeringAngleMax.

Sterring back speed
Compare the sterring speed when turning back of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Relational operator
Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this condition internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SteeringBackSpeed.

Steering speed
Compare the steering speed of the object.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Relational operator
Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this condition internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::SteeringSpeed.

Wheel grip ratio
Compare the wheel grip ratio of the object (from 0 to 1). A ratio of 0 is like driving on ice.

See parameters & details

Parameter 0: 👾 Object
Parameter 1: 🧩 Behavior
Parameter 2: 🟰 Relational operator
Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 is an internal parameter handled by GDevelop.

Technical note: this condition internal type (in GDevelop JSON) is PhysicsCar::PhysicsCar::WheelGripRatio.

Behavior expressions

Expression	Description
`Object.PhysicsCar::Acceleration()`	Return the acceleration of the object.
`Object.PhysicsCar::SpeedMax()`	Return the maximum speed of the object.
`Object.PhysicsCar::SteeringAngle()`	Return the steering angle of the object.
`Object.PhysicsCar::SteeringAngleMax()`	Return the maximum steering angle of the object.
`Object.PhysicsCar::SteeringBackSpeed()`	Return the sterring speed when turning back of the object.
`Object.PhysicsCar::SteeringSpeed()`	Return the steering speed of the object.
`Object.PhysicsCar::WheelGripRatio()`	Return the wheel grip ratio of the object (from 0 to 1). A ratio of 0 is like driving on ice.

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