Difference between revisions of "LlSetHoverHeight"

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(ah, build ceiling even for attachments)
(noted that this stops on script reset)
 
(10 intermediate revisions by 5 users not shown)
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{{LSL_Function/physical}}{{LSL_Function/damping|tau}}
{{LSL_Function
{{LSL_Function
|inject-2=
{{LSL_Function/physical}}
{{LSL_Function/damping|tau}}
|inject-3=
{{LSL_Function/boolean|water|bool=*|if=*|td=then hover above water too (or below if {{LSLP|height}} is negative)|th=then hover above water too (or below if height is negative)|fd=ignore water like it isn't there}}
|func_id=123|func_sleep=0.0|func_energy=10.0
|func_id=123|func_sleep=0.0|func_energy=10.0
|func=llSetHoverHeight
|func=llSetHoverHeight
|p1_type=float|p1_name=height|p1_desc=Distance above the ground
|p1_type=float|p1_name=height|p1_desc=Distance to hover above the ground (if negative, hovers below ground)
|p2_type=integer|p2_name=water|p2_desc=boolean, if [[TRUE]] then hover above water too.
|p2_type=integer|p2_subtype=boolean|p2_name=water
|p3_type=float|p3_name=tau
|p3_type=float|p3_name=tau
|func_footnote=Do not use with vehicles.<br/>Use [[llStopHover]] to stop hovering.
|func_footnote=Do not use with vehicles.<br/>Use [[llStopHover]] to stop hovering.
|func_desc=Critically damps to a '''height''' above the ground (or water) in '''tau''' seconds.
|func_desc=Critically damps to a {{LSLP|height}} above the ground (or water) in {{LSLP|tau}} seconds.
|return_text
|return_text
|spec
|spec
|caveats=*Do not rely on built-in limits. In the past, the difference between the object's initial position and the hover height was limited to 64 meters. Under SL Server 1.26.2 apparent limit is about 4155 meters.
|caveats=*Do not rely on built-in limits. In the past, the difference between the object's initial position and the hover height was limited to 64 meters. Under SL Server 1.26.2 the limit is 4096 meters above the ground level.
* This is not a prim property; stopping or resetting the script stops llSetHoverHeight; same with the similar [[llGroundRepel]]
* If the object tries to go above the height (like, walking up a prim ramp), llSetHoverHeight will pull it back down, unlike the similar [[llGroundRepel]]
|constants
|constants
|examples=
|examples=
<lsl>
<source lang="lsl2">
// Put in an attached prim and touch to start floating in air without flying.
// Put in an attached prim and touch to start floating in air without flying.
// Touch again to drop to the ground.
// Touch again to drop to the ground.
Line 41: Line 47:
     }
     }
}
}
</lsl>
</source>
|notes=* It is possible to assign '''height''' a negative value. If '''water''' is [[TRUE]], this will make the object hover below the water level.
* Unless [[llVolumeDetect|volume detect]] is enabled, negative '''height''' values when '''water''' is [[FALSE]] will not move the object below the ground level and may cause it to be dragged down the local incline to the nearest low point. Enabling [[llVolumeDetect|volume detect]] will cause negative '''height''' settings to move the object below the ground level.
* Assigning '''height''' a value of zero will have the same effect as [[llStopHover]].
|helpers
|helpers
|also_functions={{LSL DefineRow||[[llGroundRepel]]| Same as llSetHoverHeight but does not hover all the time}}
|also_functions={{LSL DefineRow||[[llGroundRepel]]| Same as llSetHoverHeight but does not hover all the time}}

Latest revision as of 20:38, 17 February 2024

Summary

Function: llSetHoverHeight( float height, integer water, float tau );
0.0 Forced Delay
10.0 Energy

Critically damps to a height above the ground (or water) in tau seconds.

• float height Distance to hover above the ground (if negative, hovers below ground)
• integer water boolean, if TRUE then hover above water too (or below if height is negative), if FALSE ignore water like it isn't there
• float tau seconds to critically damp in

Do not use with vehicles.
Use llStopHover to stop hovering.

Caveats

  • Only works in physics-enabled objects.
  • Do not rely on built-in limits. In the past, the difference between the object's initial position and the hover height was limited to 64 meters. Under SL Server 1.26.2 the limit is 4096 meters above the ground level.
  • This is not a prim property; stopping or resetting the script stops llSetHoverHeight; same with the similar llGroundRepel
  • If the object tries to go above the height (like, walking up a prim ramp), llSetHoverHeight will pull it back down, unlike the similar llGroundRepel

Examples

// Put in an attached prim and touch to start floating in air without flying.
// Touch again to drop to the ground.

integer gHovering = FALSE; // are we supposd to be hovering now?

default {
    touch_start(integer total_number) {
        if (!llGetAttached()) {
            llWhisper(0, "Wear me to play.");
            return;
        }

        if (gHovering) {
            llOwnerSay("Releasing you.");
            llStopHover();
        }
        else {
            llOwnerSay("Making you float...");

            // Start hovering 5 meters over our current location.
            vector myPosition = llGetPos();
            llSetHoverHeight(myPosition.z - llGround(ZERO_VECTOR) + 5.0, FALSE, 1.0);
        }

        gHovering = !gHovering; // flip the switch
    }
}

Notes

  • It is possible to assign height a negative value. If water is TRUE, this will make the object hover below the water level.
  • Unless volume detect is enabled, negative height values when water is FALSE will not move the object below the ground level and may cause it to be dragged down the local incline to the nearest low point. Enabling volume detect will cause negative height settings to move the object below the ground level.
  • Assigning height a value of zero will have the same effect as llStopHover.

See Also

Functions

•  llGroundRepel Same as llSetHoverHeight but does not hover all the time
•  llStopHover To stop hovering

Deep Notes

Signature

function void llSetHoverHeight( float height, integer water, float tau );