64 lines
1.6 KiB
C#
64 lines
1.6 KiB
C#
using UnityEngine;
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using System.Collections;
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public class RearWheelDrive : MonoBehaviour {
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private WheelCollider[] wheels;
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public float maxAngle = 30;
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public float maxTorque = 300;
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public GameObject wheelShape;
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// here we find all the WheelColliders down in the hierarchy
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public void Start()
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{
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wheels = GetComponentsInChildren<WheelCollider>();
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for (int i = 0; i < wheels.Length; ++i)
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{
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var wheel = wheels [i];
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// create wheel shapes only when needed
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if (wheelShape != null)
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{
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var ws = GameObject.Instantiate (wheelShape);
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ws.transform.parent = wheel.transform;
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}
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}
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}
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// this is a really simple approach to updating wheels
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// here we simulate a rear wheel drive car and assume that the car is perfectly symmetric at local zero
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// this helps us to figure our which wheels are front ones and which are rear
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public void Update()
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{
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float angle = maxAngle * Input.GetAxis("Horizontal");
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float torque = maxTorque * Input.GetAxis("Vertical");
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foreach (WheelCollider wheel in wheels)
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{
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// a simple car where front wheels steer while rear ones drive
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if (wheel.transform.localPosition.z > 0)
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wheel.steerAngle = angle;
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if (wheel.transform.localPosition.z < 0)
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wheel.motorTorque = torque;
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// update visual wheels if any
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if (wheelShape)
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{
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Quaternion q;
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Vector3 p;
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wheel.GetWorldPose (out p, out q);
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// assume that the only child of the wheelcollider is the wheel shape
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Transform shapeTransform = wheel.transform.GetChild (0);
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shapeTransform.position = p;
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shapeTransform.rotation = q;
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shapeTransform.localScale = new Vector3(1, 1, 1);
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}
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}
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}
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}
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