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functions:llrot2fwd [2014-12-09 16:47 SLT] sei Add nav |
functions:llrot2fwd [2015-02-04 13:27 SLT] (current) sei style, and change example to 1.5m |
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| === rot === | === rot === | ||
| - | The [[types/rotation]] whose X vector is to be returned. | + | The $lty[rotation] whose X vector is to be returned. |
| ===== Return value ===== | ===== Return value ===== | ||
| - | Returns a unit [[types/vector]] that is the local X vector for that rotation. | + | Returns a unit $lty[vector] that is the local X vector for that rotation. |
| ===== Notes ===== | ===== Notes ===== | ||
| - | * This function is roughly equivalent to ''<1, 0, 0>*rot'', except for the fact that the vector is normalized. When working with rotations that are guaranteed to be normalized (such as the ones that [[llGetRot]], [[llEuler2Rot]] etc. return), it's faster to use ''<1, 0, 0>*rot'' than **llRot2Fwd**. | + | * This function is roughly equivalent to ''<1, 0, 0>*rot'', except for the fact that the vector is normalized. When working with rotations that are guaranteed to be normalized (such as the ones that $lfn[llGetRot], $lfn[llEuler2Rot] etc. return), it's faster to use ''<1, 0, 0>*rot'' than $fn[llRot2Fwd]. |
| - | * The forward (X) vector is special in many physics-related applications in SL. For example, ''llRot2Fwd(llGetRot())'' (or equivalently, ''<1,0,0>*llGetRot()'') used in the root of an attachment gives the direction the avatar is facing; vehicles also use the X vector as the direction to move towards. | + | * The forward (X) vector is special in many physics-related applications in SL. For example, ''llRot2Fwd(llGetRot())'' (or equivalently, ''<1,0,0>*llGetRot()'') used in the root of an attachment gives the direction the avatar is facing; vehicles also use the X vector as the direction to move towards by default. |
| ===== Complete examples ===== | ===== Complete examples ===== | ||
| - | This script, if used in an attachment, will rez an object 1 m in front of the avatar's center when touched. If used in an object that is not attached, it will rez the object 1m away in the direction of its local X axis. | + | This script, if used in an attachment, will rez an object 1.5 m in front of the avatar's center when touched. If used in an object that is not attached, it will rez the object 1.5m away in the direction of its local X axis. |
| <file lsl2 llRot2Fwd-example.lsl> | <file lsl2 llRot2Fwd-example.lsl> | ||
| Line 31: | Line 31: | ||
| touch_start(integer num) | touch_start(integer num) | ||
| { | { | ||
| - | vector pos = llGetPos() + llRot2Fwd(llGetRot()); | + | vector pos = llGetPos() + llRot2Fwd(llGetRot())*1.5; |
| llRezObject("Object", pos, <0,0,0>, llGetRot(), 1); | llRezObject("Object", pos, <0,0,0>, llGetRot(), 1); | ||
| } | } | ||
| Line 39: | Line 39: | ||
| ===== See also ===== | ===== See also ===== | ||
| - | * [[llRot2Left]] returns the local Y axis of a rotation. | + | * $lfn[llRot2Left] returns the local Y axis of a rotation. |
| - | * [[llRot2Up]] returns the local Z axis of a rotation. | + | * $lfn[llRot2Up] returns the local Z axis of a rotation. |
| - | * [[llAxes2Rot]] takes local X, Y, and Z unit vectors and converts them to a rotation. | + | * $lfn[llAxes2Rot] takes local X, Y, and Z unit vectors and converts them to a rotation. |