1 using UnityEngine;
2 using System.Collections;
3 using UnityStandardAssets.Vehicles.Car;
4
5 [RequireComponent(typeof(Rigidbody))]
6 public class Motor : MonoBehaviour {
7
8 public timer tim;
9
10 private bool respawned = false;
11 private bool waitframe = true;
12
13 private Vector3 startpos;
14 private Quaternion startrot;
15
16 public Color color;
17
18 public bool crossmiddle = false;
19 public int lap = 1;
20
21 public float enginepower = 200f;
22 public float turnpower = 20f;
23 public float brake = 1000f;
24
25 public bool hittingFloor = false;
26
27 public Rigidbody m_Rigidbody;
28 public Wheel FRWheel;
29 public Wheel FLWheel;
30 public Wheel BRWheel;
31 public Wheel BLWheel;
32
33 [Range(0, 1)] public float m_SteerHelper;
34
35 public WheelCollider[] m_WheelColliders = new WheelCollider[4];
36 public WheelEffects[] m_WheelEffects = new WheelEffects[4];
37
38 public float MaxSpeed = 200;
39 public float Revs = 0;
40 public float m_SlipLimit = 0.3f;
41
42 public float CurrentSpeed { get { return m_Rigidbody.velocity.magnitude * 2.23693629f; } }
43 public float AccelInput { get; private set; }
44
45 private float m_OldRotation;
46
47
48 private void Start()
49 {
50 tim = transform.root.GetComponentInChildren<timer>();
51 m_Rigidbody = GetComponent<Rigidbody>();
52 startpos = transform.position;
53 startrot = transform.rotation;
54 }
55
56 public void resetIt()
57 {
58 transform.rotation = startrot;
59 transform.position = startpos;
60 respawned = true;
61 crossmiddle = false;
62 lap = 1;
63
64 for (int i = 0; i < 4; i++)
65 {
66 m_WheelColliders[i].motorTorque = 0;
67 m_WheelColliders[i].steerAngle = 0;
68 m_WheelColliders[i].steerAngle = 0;
69 m_WheelColliders[i].brakeTorque = Mathf.Infinity;
70 }
71 m_Rigidbody.isKinematic = true;
72 respawned = true;
73 waitframe = false;
74 }
75
76 void LateUpdate()
77 {
78 // (if the vehicle has been respanwed this frame,
79 // then a variable respawned is set to true)
80
81 if (waitframe && respawned)
82 {
83 waitframe = false;
84 for (int i = 0; i < 4; i++)
85 {
86 m_WheelColliders[i].brakeTorque = 0;
87 }
88 m_Rigidbody.isKinematic = false;
89 respawned = false;
90 }
91 else if (!waitframe && respawned)
92 {
93 waitframe = true;
94 }
95 }
96
97 void FixedUpdate()
98 {
99
100
101
102 hittingFloor = false;
103 for (int i = 0; i < 4; i++)
104 {
105 if (m_WheelColliders[i].isGrounded)
106 {
107 hittingFloor = true;
108 break;
109 }
110 }
111
112 Revs = Mathf.Lerp(Revs, Mathf.Abs(CurrentSpeed / 200), Time.deltaTime * 5f);
113
114 CheckForWheelSpin();
115 SteerHelper();
116
117 float posx = Mathf.Clamp(transform.position.x,10,240);
118 float posz = Mathf.Clamp(transform.position.z,10,340);
119
120 transform.position = new Vector3(posx, transform.position.y,posz);
121
122
123 }
124
125 public void Move(float turn, float accel, float thebrake, float other)
126 {
127 float torque = accel * enginepower;
128
129 AccelInput = Mathf.Clamp(torque, 0, 1);
130
131 FRWheel.Move(torque);
132 FLWheel.Move(torque);
133 BRWheel.Move(torque);
134 BLWheel.Move(torque);
135
136 float steer = turn * turnpower;
137
138 FRWheel.Turn(steer);
139 FLWheel.Turn(steer);
140
141 for (int i = 0; i < 4; i++)
142 {
143 if (CurrentSpeed > 5)
144 {
145 m_WheelColliders[i].brakeTorque = brake * thebrake;
146 }
147 //else if (footbrake > 0)
148 //{
149 // m_WheelColliders[i].brakeTorque = 0f;
150 // m_WheelColliders[i].motorTorque = -enginepower * footbrake;
151 //}
152 }
153
154 }
155
156
157 public void HandBrake(float val)
158 {
159
160 for (int i = 0; i < 4; i++)
161 {
162 WheelFrictionCurve fc = m_WheelColliders[i].sidewaysFriction;
163
164 fc.extremumSlip = Mathf.Lerp(0.1f, 0.4f, val);
165 fc.asymptoteSlip = Mathf.Lerp(0.2f, 0.5f, val);
166 m_WheelColliders[i].sidewaysFriction = fc;
167 }
168
169 }
170
171 private void CheckForWheelSpin()
172 {
173 // loop through all wheels
174
175 for (int i = 0; i < 4; i++)
176 {
177 WheelHit wheelHit;
178 m_WheelColliders[i].GetGroundHit(out wheelHit);
179
180 // is the tire slipping above the given threshhold
181 if (Mathf.Abs(wheelHit.sidewaysSlip) >= m_SlipLimit)
182 {
183 // avoiding all four tires screeching at the same time
184 // if they do it can lead to some strange audio artefacts
185 if (!AnySkidSoundPlaying())
186 {
187 m_WheelEffects[i].PlayAudio();
188 }
189 continue;
190 }
191
192 // if it wasnt slipping stop all the audio
193 if (m_WheelEffects[i].PlayingAudio)
194 {
195 m_WheelEffects[i].StopAudio();
196 }
197 // end the trail generation
198 m_WheelEffects[i].EndSkidTrail();
199 }
200 }
201
202 private bool AnySkidSoundPlaying()
203 {
204 for (int i = 0; i < 4; i++)
205 {
206 if (m_WheelEffects[i].PlayingAudio)
207 {
208 return true;
209 }
210 }
211 return false;
212 }
213
214 private void SteerHelper()
215 {
216 for (int i = 0; i < 4; i++)
217 {
218 WheelHit wheelhit;
219 m_WheelColliders[i].GetGroundHit(out wheelhit);
220 if (wheelhit.normal == Vector3.zero)
221 return; // wheels arent on the ground so dont realign the rigidbody velocity
222 }
223
224 // this if is needed to avoid gimbal lock problems that will make the car suddenly shift direction
225 if (Mathf.Abs(m_OldRotation - transform.eulerAngles.y) < 10f)
226 {
227 var turnadjust = (transform.eulerAngles.y - m_OldRotation) * m_SteerHelper;
228 Quaternion velRotation = Quaternion.AngleAxis(turnadjust, Vector3.up);
229 m_Rigidbody.velocity = velRotation * m_Rigidbody.velocity;
230 }
231 m_OldRotation = transform.eulerAngles.y;
232 }
233
234 public void hitMark(Transform mark)
235 {
236 if (mark.name == "middle")
237 {
238 crossmiddle = true;
239 }
240 if (crossmiddle && mark.name == "begin")
241 {
242 crossmiddle = false;
243 lap++;
244 if (lap == tim.laps + 1)
245 {
246 SendMessage("finished");
247 }
248 tim.addlap(transform,lap,color);
249 }
250 }
251
252 }
