56 lines
1.7 KiB
C#
56 lines
1.7 KiB
C#
using UnityEngine;
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using System.Collections;
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[ExecuteInEditMode()]
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public class EasySuspension : MonoBehaviour {
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[Range(0, 20)]
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public float naturalFrequency = 10;
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[Range(0, 3)]
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public float dampingRatio = 0.8f;
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[Range(-1, 1)]
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public float forceShift = 0.03f;
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public bool setSuspensionDistance = true;
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void Update () {
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// work out the stiffness and damper parameters based on the better spring model
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foreach (WheelCollider wc in GetComponentsInChildren<WheelCollider>()) {
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JointSpring spring = wc.suspensionSpring;
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spring.spring = Mathf.Pow(Mathf.Sqrt(wc.sprungMass) * naturalFrequency, 2);
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spring.damper = 2 * dampingRatio * Mathf.Sqrt(spring.spring * wc.sprungMass);
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wc.suspensionSpring = spring;
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Vector3 wheelRelativeBody = transform.InverseTransformPoint(wc.transform.position);
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float distance = GetComponent<Rigidbody>().centerOfMass.y - wheelRelativeBody.y + wc.radius;
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wc.forceAppPointDistance = distance - forceShift;
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// the following line makes sure the spring force at maximum droop is exactly zero
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if (spring.targetPosition > 0 && setSuspensionDistance)
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wc.suspensionDistance = wc.sprungMass * Physics.gravity.magnitude / (spring.targetPosition * spring.spring);
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}
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}
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// uncomment OnGUI to observe how parameters change
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/*
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public void OnGUI()
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{
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foreach (WheelCollider wc in GetComponentsInChildren<WheelCollider>()) {
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GUILayout.Label (string.Format("{0} sprung: {1}, k: {2}, d: {3}", wc.name, wc.sprungMass, wc.suspensionSpring.spring, wc.suspensionSpring.damper));
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}
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var rb = GetComponent<Rigidbody> ();
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GUILayout.Label ("Inertia: " + rb.inertiaTensor);
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GUILayout.Label ("Mass: " + rb.mass);
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GUILayout.Label ("Center: " + rb.centerOfMass);
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}
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*/
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}
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