Rotation
How do I use Rotation
Below are practical examples compiled from projects for learning and reference purposes
Featured Snippets
File name: PickupCamera.cs
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94 void Apply( Transform dummyTarget, Vector3 dummyCenter )
95 {
96 // Early out if we don't have a target
97 if( !controller )
98 return;
99
100 Vector3 targetCenter = _target.position + centerOffset;
101 Vector3 targetHead = _target.position + headOffset;
102
103 // DebugDrawStuff();
104
105 // Calculate the current & target rotation angles
106 float originalTargetAngle = _target.eulerAngles.y;
107 float currentAngle = cameraTransform.eulerAngles.y;
108
109 // Adjust real target angle when camera is locked
110 float targetAngle = originalTargetAngle;
111
112 // When pressing Fire2 (alt) the camera will snap to the target direction real quick.
113 // It will stop snapping when it reaches the target
114 if( Input.GetButton( "Fire2" ) )
115 snap = true;
116
117 if( snap )
118 {
119 // We are close to the target, so we can stop snapping now!
120 if( AngleDistance( currentAngle, originalTargetAngle ) < 3.0f )
121 snap = false;
122
123 currentAngle = Mathf.SmoothDampAngle( currentAngle, targetAngle, ref angleVelocity, snapSmoothLag, snapMaxSpeed );
124 }
125 // Normal camera motion
126 else
127 {
128 if( controller.GetLockCameraTimer() < lockCameraTimeout )
129 {
130 targetAngle = currentAngle;
131 }
132
133 // Lock the camera when moving backwards!
134 // * It is really confusing to do 180 degree spins when turning around.
135 if( AngleDistance( currentAngle, targetAngle ) > 160 && controller.IsMovingBackwards() )
136 targetAngle += 180;
137
138 currentAngle = Mathf.SmoothDampAngle( currentAngle, targetAngle, ref angleVelocity, angularSmoothLag, angularMaxSpeed );
139 }
140
141
142 // When jumping don't move camera upwards but only down!
143 if( controller.IsJumping() )
144 {
145 // We'd be moving the camera upwards, do that only if it's really high
146 float newTargetHeight = targetCenter.y + height;
147 if( newTargetHeight < targetHeight || newTargetHeight - targetHeight > 5 )
148 targetHeight = targetCenter.y + height;
149 }
150 // When walking always update the target height
151 else
152 {
153 targetHeight = targetCenter.y + height;
154 }
155
156 // Damp the height
157 float currentHeight = cameraTransform.position.y;
158 currentHeight = Mathf.SmoothDamp( currentHeight, targetHeight, ref heightVelocity, heightSmoothLag );
159
160 // Convert the angle into a rotation, by which we then reposition the camera
161 Quaternion currentRotation = Quaternion.Euler( 0, currentAngle, 0 );
162
163 // Set the position of the camera on the x-z plane to:
164 // distance meters behind the target
165 cameraTransform.position = targetCenter;
166 cameraTransform.position += currentRotation * Vector3.back * distance;
167
168 // Set the height of the camera
169 cameraTransform.position = new Vector3( cameraTransform.position.x, currentHeight, cameraTransform.position.z );
170
171 // Always look at the target
172 SetUpRotation( targetCenter, targetHead );
173 }
File name: PickupCamera.cs
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198 void SetUpRotation( Vector3 centerPos, Vector3 headPos )
199 {
200 // Now it's getting hairy. The devil is in the details here, the big issue is jumping of course.
201 // * When jumping up and down we don't want to center the guy in screen space.
202 // This is important to give a feel for how high you jump and avoiding large camera movements.
203 //
204 // * At the same time we dont want him to ever go out of screen and we want all rotations to be totally smooth.
205 //
206 // So here is what we will do:
207 //
208 // 1. We first find the rotation around the y axis. Thus he is always centered on the y-axis
209 // 2. When grounded we make him be centered
210 // 3. When jumping we keep the camera rotation but rotate the camera to get him back into view if his head is above some threshold
211 // 4. When landing we smoothly interpolate towards centering him on screen
212 Vector3 cameraPos = cameraTransform.position;
213 Vector3 offsetToCenter = centerPos - cameraPos;
214
215 // Generate base rotation only around y-axis
216 Quaternion yRotation = Quaternion.LookRotation( new Vector3( offsetToCenter.x, 0, offsetToCenter.z ) );
217
218 Vector3 relativeOffset = Vector3.forward * distance + Vector3.down * height;
219 cameraTransform.rotation = yRotation * Quaternion.LookRotation( relativeOffset );
220
221 // Calculate the projected center position and top position in world space
222 Ray centerRay = m_CameraTransformCamera.ViewportPointToRay( new Vector3( 0.5f, 0.5f, 1 ) );
223 Ray topRay = m_CameraTransformCamera.ViewportPointToRay( new Vector3( 0.5f, clampHeadPositionScreenSpace, 1 ) );
224
225 Vector3 centerRayPos = centerRay.GetPoint( distance );
226 Vector3 topRayPos = topRay.GetPoint( distance );
227
228 float centerToTopAngle = Vector3.Angle( centerRay.direction, topRay.direction );
229
230 float heightToAngle = centerToTopAngle / ( centerRayPos.y - topRayPos.y );
231
232 float extraLookAngle = heightToAngle * ( centerRayPos.y - centerPos.y );
233 if( extraLookAngle < centerToTopAngle )
234 {
235 extraLookAngle = 0;
236 }
237 else
238 {
239 extraLookAngle = extraLookAngle - centerToTopAngle;
240 cameraTransform.rotation *= Quaternion.Euler( -extraLookAngle, 0, 0 );
241 }
242 }
File name: PickupController.cs
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151 void Update()
152 {
153 if (isControllable)
154 {
155 if (Input.GetButtonDown("Jump"))
156 {
157 lastJumpButtonTime = Time.time;
158 }
159
160 UpdateSmoothedMovementDirection();
161
162 // Apply gravity
163 // - extra power jump modifies gravity
164 // - controlledDescent mode modifies gravity
165 ApplyGravity();
166
167 // Apply jumping logic
168 ApplyJumping();
169
170
171 // Calculate actual motion
172 Vector3 movement = moveDirection * moveSpeed + new Vector3(0, verticalSpeed, 0) + inAirVelocity;
173 movement *= Time.deltaTime;
174
175 //Debug.Log(movement.x.ToString("0.000") + ":" + movement.z.ToString("0.000"));
176
177 // Move the controller
178 CharacterController controller = GetComponent
179 collisionFlags = controller.Move(movement);
180
181 }
182
183 // PUN: if a remote position is known, we smooth-move to it (being late(r) but smoother)
184 if (this.remotePosition != Vector3.zero)
185 {
186 transform.position = Vector3.Lerp(transform.position, this.remotePosition, Time.deltaTime * this.RemoteSmoothing);
187 }
188
189 velocity = (transform.position - lastPos)*25;
190
191 // ANIMATION sector
192 if (_animation)
193 {
194 if (_characterState == PickupCharacterState.Jumping)
195 {
196 if (!jumpingReachedApex)
197 {
198 _animation[jumpPoseAnimation.name].speed = jumpAnimationSpeed;
199 _animation[jumpPoseAnimation.name].wrapMode = WrapMode.ClampForever;
200 _animation.CrossFade(jumpPoseAnimation.name);
201 }
202 else
203 {
204 _animation[jumpPoseAnimation.name].speed = -landAnimationSpeed;
205 _animation[jumpPoseAnimation.name].wrapMode = WrapMode.ClampForever;
206 _animation.CrossFade(jumpPoseAnimation.name);
207 }
208 }
209 else
210 {
211 if (_characterState == PickupCharacterState.Idle)
212 {
213 _animation.CrossFade(idleAnimation.name);
214 }
215 else if (_characterState == PickupCharacterState.Running)
216 {
217 _animation[runAnimation.name].speed = runMaxAnimationSpeed;
218 if (this.isControllable)
219 {
220 _animation[runAnimation.name].speed = Mathf.Clamp(velocity.magnitude, 0.0f, runMaxAnimationSpeed);
221 }
222 _animation.CrossFade(runAnimation.name);
223 }
224 else if (_characterState == PickupCharacterState.Trotting)
225 {
226 _animation[walkAnimation.name].speed = trotMaxAnimationSpeed;
227 if (this.isControllable)
228 {
229 _animation[walkAnimation.name].speed = Mathf.Clamp(velocity.magnitude, 0.0f, trotMaxAnimationSpeed);
230 }
231 _animation.CrossFade(walkAnimation.name);
232 }
233 else if (_characterState == PickupCharacterState.Walking)
234 {
235 _animation[walkAnimation.name].speed = walkMaxAnimationSpeed;
236 if (this.isControllable)
237 {
238 _animation[walkAnimation.name].speed = Mathf.Clamp(velocity.magnitude, 0.0f, walkMaxAnimationSpeed);
239 }
240 _animation.CrossFade(walkAnimation.name);
241 }
242
243 if (_characterState != PickupCharacterState.Running)
244 {
245 _animation[runAnimation.name].time = 0.0f;
246 }
247 }
248 }
249 // ANIMATION sector
250
251 // Set rotation to the move direction
252 if (IsGrounded())
253 {
254 // a specialty of this controller: you can disable rotation!
255 if (DoRotate)
256 {
257 transform.rotation = Quaternion.LookRotation(moveDirection);
258 }
259 }
260 else
261 {
262 /* This causes choppy behaviour when colliding with SIDES
263 * Vector3 xzMove = velocity;
264 xzMove.y = 0;
265 if (xzMove.sqrMagnitude > 0.001f)
266 {
267 transform.rotation = Quaternion.LookRotation(xzMove);
268 }*/
269 }
270
271 // We are in jump mode but just became grounded
272 if (IsGrounded())
273 {
274 lastGroundedTime = Time.time;
275 inAirVelocity = Vector3.zero;
276 if (jumping)
277 {
278 jumping = false;
279 SendMessage("DidLand", SendMessageOptions.DontRequireReceiver);
280 }
281 }
282
283 lastPos = transform.position;
284 }
File name: RPGCamera.cs
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30 void LateUpdate()
31 {
32 UpdateDistance();
33 UpdateZoom();
34 UpdatePosition();
35 UpdateRotation();
36 }
File name: RPGCamera.cs
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58 void UpdateRotation()
59 {
60 if( Input.GetMouseButton( 0 ) == true || Input.GetMouseButton( 1 ) == true )
61 {
62 transform.Rotate( 0, Input.GetAxis( "Mouse X" ) * TurnModifier, 0 );
63 }
64
65 if( Input.GetMouseButton( 1 ) == true && Target != null )
66 {
67 Target.rotation = Quaternion.Euler( 0, transform.rotation.eulerAngles.y, 0 );
68 }
69 }
File name: CubeExtra.cs
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21 // this method is called by PUN when this script is being "observed" by a PhotonView (setup in inspector)
22 public void OnPhotonSerializeView(PhotonStream stream, PhotonMessageInfo info)
23 {
24 // Always send transform (depending on reliability of the network view)
25 if (stream.isWriting)
26 {
27 Vector3 pos = transform.localPosition;
28 Quaternion rot = transform.localRotation;
29 stream.Serialize(ref pos);
30 stream.Serialize(ref rot);
31 }
32 // When receiving, buffer the information
33 else
34 {
35 // Receive latest state information
36 Vector3 pos = Vector3.zero;
37 Quaternion rot = Quaternion.identity;
38 stream.Serialize(ref pos);
39 stream.Serialize(ref rot);
40
41 lastMovement = (pos - latestCorrectPos) / (Time.time - lastTime);
42
43 lastTime = Time.time;
44 latestCorrectPos = pos;
45
46 transform.position = latestCorrectPos;
47 }
48 }
File name: CubeInter.cs
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34 void OnPhotonSerializeView(PhotonStream stream, PhotonMessageInfo info)
35 {
36 // Always send transform (depending on reliability of the network view)
37 if (stream.isWriting)
38 {
39 Vector3 pos = transform.localPosition;
40 Quaternion rot = transform.localRotation;
41 stream.Serialize(ref pos);
42 stream.Serialize(ref rot);
43 }
44 // When receiving, buffer the information
45 else
46 {
47 // Receive latest state information
48 Vector3 pos = Vector3.zero;
49 Quaternion rot = Quaternion.identity;
50 stream.Serialize(ref pos);
51 stream.Serialize(ref rot);
52
53 // Shift buffer contents, oldest data erased, 18 becomes 19, ... , 0 becomes 1
54 for (int i = m_BufferedState.Length - 1; i >= 1; i--)
55 {
56 m_BufferedState[i] = m_BufferedState[i - 1];
57 }
58
59
60 // Save currect received state as 0 in the buffer, safe to overwrite after shifting
61 State state;
62 state.timestamp = info.timestamp;
63 state.pos = pos;
64 state.rot = rot;
65 m_BufferedState[0] = state;
66
67 // Increment state count but never exceed buffer size
68 m_TimestampCount = Mathf.Min(m_TimestampCount + 1, m_BufferedState.Length);
69
70 // Check integrity, lowest numbered state in the buffer is newest and so on
71 for (int i = 0; i < m_TimestampCount - 1; i++)
72 {
73 if (m_BufferedState[i].timestamp < m_BufferedState[i + 1].timestamp)
74 Debug.Log("State inconsistent");
75 }
76 }
77 }
File name: CubeInter.cs
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79 // This only runs where the component is enabled, which is only on remote peers (server/clients)
80 void Update()
81 {
82 double currentTime = PhotonNetwork.time;
83 double interpolationTime = currentTime - interpolationBackTime;
84 // We have a window of interpolationBackTime where we basically play
85 // By having interpolationBackTime the average ping, you will usually use interpolation.
86 // And only if no more data arrives we will use extrapolation
87
88 // Use interpolation
89 // Check if latest state exceeds interpolation time, if this is the case then
90 // it is too old and extrapolation should be used
91 if (m_BufferedState[0].timestamp > interpolationTime)
92 {
93 for (int i = 0; i < m_TimestampCount; i++)
94 {
95 // Find the state which matches the interpolation time (time+0.1) or use last state
96 if (m_BufferedState[i].timestamp <= interpolationTime || i == m_TimestampCount - 1)
97 {
98 // The state one slot newer (<100ms) than the best playback state
99 State rhs = m_BufferedState[Mathf.Max(i - 1, 0)];
100 // The best playback state (closest to 100 ms old (default time))
101 State lhs = m_BufferedState[i];
102
103 // Use the time between the two slots to determine if interpolation is necessary
104 double length = rhs.timestamp - lhs.timestamp;
105 float t = 0.0F;
106 // As the time difference gets closer to 100 ms t gets closer to 1 in
107 // which case rhs is only used
108 if (length > 0.0001)
109 t = (float)((interpolationTime - lhs.timestamp) / length);
110
111 // if t=0 => lhs is used directly
112 transform.localPosition = Vector3.Lerp(lhs.pos, rhs.pos, t);
113 transform.localRotation = Quaternion.Slerp(lhs.rot, rhs.rot, t);
114 return;
115 }
116 }
117 }
118 // Use extrapolation. Here we do something really simple and just repeat the last
119 // received state. You can do clever stuff with predicting what should happen.
120 else
121 {
122 State latest = m_BufferedState[0];
123
124 transform.localPosition = Vector3.Lerp(transform.localPosition, latest.pos, Time.deltaTime * 20 );
125 transform.localRotation = latest.rot;
126 }
127 }
File name: CubeLerp.cs
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35 public void OnPhotonSerializeView(PhotonStream stream, PhotonMessageInfo info)
36 {
37 if (stream.isWriting)
38 {
39 Vector3 pos = transform.localPosition;
40 Quaternion rot = transform.localRotation;
41 stream.Serialize(ref pos);
42 stream.Serialize(ref rot);
43 }
44 else
45 {
46 // Receive latest state information
47 Vector3 pos = Vector3.zero;
48 Quaternion rot = Quaternion.identity;
49
50 stream.Serialize(ref pos);
51 stream.Serialize(ref rot);
52
53 latestCorrectPos = pos; // save this to move towards it in FixedUpdate()
54 onUpdatePos = transform.localPosition; // we interpolate from here to latestCorrectPos
55 fraction = 0; // reset the fraction we alreay moved. see Update()
56
57 transform.localRotation = rot; // this sample doesn't smooth rotation
58 }
59 }
File name: ThirdPersonCamera.cs
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86 void Apply( Transform dummyTarget, Vector3 dummyCenter )
87 {
88 // Early out if we don't have a target
89 if( !controller )
90 return;
91
92 Vector3 targetCenter = _target.position + centerOffset;
93 Vector3 targetHead = _target.position + headOffset;
94
95 // DebugDrawStuff();
96
97 // Calculate the current & target rotation angles
98 float originalTargetAngle = _target.eulerAngles.y;
99 float currentAngle = cameraTransform.eulerAngles.y;
100
101 // Adjust real target angle when camera is locked
102 float targetAngle = originalTargetAngle;
103
104 // When pressing Fire2 (alt) the camera will snap to the target direction real quick.
105 // It will stop snapping when it reaches the target
106 if( Input.GetButton( "Fire2" ) )
107 snap = true;
108
109 if( snap )
110 {
111 // We are close to the target, so we can stop snapping now!
112 if( AngleDistance( currentAngle, originalTargetAngle ) < 3.0f )
113 snap = false;
114
115 currentAngle = Mathf.SmoothDampAngle( currentAngle, targetAngle, ref angleVelocity, snapSmoothLag, snapMaxSpeed );
116 }
117 // Normal camera motion
118 else
119 {
120 if( controller.GetLockCameraTimer() < lockCameraTimeout )
121 {
122 targetAngle = currentAngle;
123 }
124
125 // Lock the camera when moving backwards!
126 // * It is really confusing to do 180 degree spins when turning around.
127 if( AngleDistance( currentAngle, targetAngle ) > 160 && controller.IsMovingBackwards() )
128 targetAngle += 180;
129
130 currentAngle = Mathf.SmoothDampAngle( currentAngle, targetAngle, ref angleVelocity, angularSmoothLag, angularMaxSpeed );
131 }
132
133
134 // When jumping don't move camera upwards but only down!
135 if( controller.IsJumping() )
136 {
137 // We'd be moving the camera upwards, do that only if it's really high
138 float newTargetHeight = targetCenter.y + height;
139 if( newTargetHeight < targetHeight || newTargetHeight - targetHeight > 5 )
140 targetHeight = targetCenter.y + height;
141 }
142 // When walking always update the target height
143 else
144 {
145 targetHeight = targetCenter.y + height;
146 }
147
148 // Damp the height
149 float currentHeight = cameraTransform.position.y;
150 currentHeight = Mathf.SmoothDamp( currentHeight, targetHeight, ref heightVelocity, heightSmoothLag );
151
152 // Convert the angle into a rotation, by which we then reposition the camera
153 Quaternion currentRotation = Quaternion.Euler( 0, currentAngle, 0 );
154
155 // Set the position of the camera on the x-z plane to:
156 // distance meters behind the target
157 cameraTransform.position = targetCenter;
158 cameraTransform.position += currentRotation * Vector3.back * distance;
159
160 // Set the height of the camera
161 cameraTransform.position = new Vector3( cameraTransform.position.x, currentHeight, cameraTransform.position.z );
162
163 // Always look at the target
164 SetUpRotation( targetCenter, targetHead );
165 }
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