llSetCameraParams

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/LSL

SetCameraParams

llSetCameraParams

Summary

Function: llSetCameraParams( list rules );

0.0	Forced Delay
10.0	Energy

Sets multiple camera parameters at once.

• list

rules

–

Format is [ rule1, data1, rule2, data2 . . . rulen, datan ]

To run this function the script must request the PERMISSION_CONTROL_CAMERA permission with llRequestPermissions.

Rule		Parameter	Default	Value Range	Description
CAMERA_ACTIVE	12	integer isActive	FALSE	TRUE or FALSE	Turns on or off scripted control of the camera.
CAMERA_BEHINDNESS_ANGLE	8	float degrees	10.0	0 to 180	Sets the angle in degrees within which the camera is not constrained by changes in target rotation.
CAMERA_BEHINDNESS_LAG	9	float seconds	0.0	0 to 3	Sets how strongly the camera is forced to stay behind the target if outside of behindness angle.
CAMERA_DISTANCE	7	float meters	3.0	0.5 to 50	Sets how far away the camera wants to be from its target.
CAMERA_FOCUS	17	vector position	n/a	n/a	Sets camera focus (target position) in region coordinates.
CAMERA_FOCUS_LAG	6	float seconds	0.1	0 to 3	How much the camera lags as it tries to aim towards the target.
CAMERA_FOCUS_LOCKED	22	integer isLocked	FALSE	TRUE or FALSE	Locks the camera focus so it will not move.
CAMERA_FOCUS_OFFSET	1	vector meters	<0.0,0.0,0.0>	<-10,-10,-10> to <10,10,10>	Adjusts the camera focus position relative to the target.
CAMERA_FOCUS_THRESHOLD	11	float meters	1.0	0 to 4	Sets the radius of a sphere around the camera's target position within which its focus is not affected by target motion.
CAMERA_PITCH	0	float degrees	0.0	-45 to 80	Adjusts the angular amount that the camera aims straight ahead vs. straight down, maintaining the same distance; analogous to 'incidence'."
CAMERA_POSITION	13	vector position	n/a	n/a	Sets camera position in region coordinates.
CAMERA_POSITION_LAG	5	float seconds	0.1	0 to 3	How much the camera lags as it tries to move towards its 'ideal' position.
CAMERA_POSITION_LOCKED	21	integer isLocked	FALSE	TRUE or FALSE	Locks the camera position so it will not move.
CAMERA_POSITION_THRESHOLD	10	float meters	1.0	0 to 4	Sets the radius of a sphere around the camera's ideal position within which it is not affected by target motion.

Caveats

Permissions

Do not depend upon the auto-grant status of permissions. Always use the run_time_permissions event. If the script lacks the permission PERMISSION_CONTROL_CAMERA, the script will shout an error on DEBUG_CHANNEL and the operation fails (but the script continues to run). The PERMISSION_CONTROL_CAMERA permission is automatically revoked when the avatar stands up from or detaches the object, and any scripted camera parameters are automatically cleared.

• Camera control currently (server 1.38) only supported for attachments and objects on which you are sitting. An attempt otherwise will result in an error being shouted on DEBUG_CHANNEL.
• Scripted camera parameters are overriden for agents who are in Free Camera mode (Alt + Click). No error is returned if this is the case; however when the agent returns to regular camera mode, their camera will go to the scripted camera position.
• When CAMERA_FOCUS is not defined, it is advised that CAMERA_FOCUS_THRESHOLD is set to 0.0 - this is because when left at it's default value, it may prevent the camera from focusing on the correct point, instead focusing just to the side of the intended point.
• A CAMERA_FOCUS_OFFSET of ZERO_VECTOR will always look at the same position as returned by llGetPos() for the avatar
  • When seated, this is also the position of "Avatar Center" when hover height is 0
  • When standing, this has a shape-dependent z-offset from "Avatar Center". (currently investigating Tapple Gao (talk))

Examples

You can either set the camera in region relative coordinates or you can make the camera follow your avatar.

Region relative coordinates, an example:

lookAtMe( integer perms )
{
    if ( perms & PERMISSION_CONTROL_CAMERA )
    {
        vector camPos = llGetPos() + (relCamP * llGetRot() * turnOnChair) ;
        vector camFocus = llGetPos() ;
        llClearCameraParams(); // reset camera to default
        llSetCameraParams([
            CAMERA_ACTIVE, 1, // 1 is active, 0 is inactive
            CAMERA_FOCUS, camFocus, // region relative position
            CAMERA_FOCUS_LOCKED, TRUE, // (TRUE or FALSE)
            CAMERA_POSITION, camPos, // region relative position
            CAMERA_POSITION_LOCKED, TRUE // (TRUE or FALSE)
        ]);
    }
}

Note that Focus and Position are both locked. This first example makes the camera look at camFocus from camPos.

Camera follow avatar, an example:

lookAtMe( integer perms )
{
    if ( perms & PERMISSION_CONTROL_CAMERA )
    {
        llClearCameraParams(); // reset camera to default
        llSetCameraParams([
            CAMERA_ACTIVE, 1, // 1 is active, 0 is inactive
            CAMERA_BEHINDNESS_ANGLE, 30.0, // (0 to 180) degrees
            CAMERA_BEHINDNESS_LAG, 0.0, // (0 to 3) seconds
            CAMERA_DISTANCE, 10.0, // ( 0.5 to 10) meters
          //CAMERA_FOCUS, <0,0,5>, // region relative position
            CAMERA_FOCUS_LAG, 0.05 , // (0 to 3) seconds
            CAMERA_FOCUS_LOCKED, FALSE, // (TRUE or FALSE)
            CAMERA_FOCUS_THRESHOLD, 0.0, // (0 to 4) meters
            CAMERA_PITCH, 10.0, // (-45 to 80) degrees
          //CAMERA_POSITION, <0,0,0>, // region relative position
            CAMERA_POSITION_LAG, 0.0, // (0 to 3) seconds
            CAMERA_POSITION_LOCKED, FALSE, // (TRUE or FALSE)
            CAMERA_POSITION_THRESHOLD, 0.0, // (0 to 4) meters
            CAMERA_FOCUS_OFFSET, <2.0, 0.0, 0.0> // <-10,-10,-10> to <10,10,10> meters
        ]);
    }
}

Note that in this second example Focus and Position are NOT locked and not even set. This is appropriate for making the camera follow a pilot on a vehicle.

See Also

Events

•

run_time_permissions

–

Permission receiving event

Functions

•	llGetPermissions	–	Get the permissions granted
•	llGetPermissionsKey	–	Get the agent who granted permissions
•	llRequestPermissions	–	Request permissions
•	llClearCameraParams
•	llGetCameraPos
•	llGetCameraRot

Articles

•	Script permissions
•	FollowCam

Deep Notes

Tests

•

llSetCameraParams Test

Signature
function void llSetCameraParams( list rules );