LlSetLinkPrimitiveParams

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Summary

Function: llSetLinkPrimitiveParams( integer linknumber, list rules );

Set primitive parameters for linknumber based on rules.

• integer linknumber Link number (0: unlinked, 1: root prim, >1: child prims and seated avatars) or a LINK_* flag
• list rules
Flag Description
LINK_ROOT 1 refers to the root prim in a multi-prim linked set[1]
LINK_SET -1 refers to all prims
LINK_ALL_OTHERS -2 refers to all other prims
Flag Description
LINK_ALL_CHILDREN -3 refers to all children, (everything but the root)
LINK_THIS -4 refers to the prim the script is in
Parameter Return Values / Additional Parameters Description
PRIM_NAME ] 27 [ string name ] Name: llGetObjectName / llSetObjectName
PRIM_DESC ] 28 [ string description ] Description: llGetObjectDesc / llSetObjectDesc
PRIM_TYPE ] 9 [ integer flag ] + flag_parameters Gets / Sets the prim shape.
flag Constants Additional Return Values / Flag Parameters
PRIM_TYPE_BOX 0 [ integer hole_shape, vector cut, float hollow, vector twist, vector top_size, vector top_shear ]
PRIM_TYPE_CYLINDER 1 [ integer hole_shape, vector cut, float hollow, vector twist, vector top_size, vector top_shear ]
PRIM_TYPE_PRISM 2 [ integer hole_shape, vector cut, float hollow, vector twist, vector top_size, vector top_shear ]
PRIM_TYPE_SPHERE 3 [ integer hole_shape, vector cut, float hollow, vector twist, vector dimple]
PRIM_TYPE_TORUS 4 [ integer hole_shape, vector cut, float hollow, vector twist, vector hole_size, vector top_shear, vector advanced_cut, vector taper, float revolutions, float radius_offset, float skew ]
PRIM_TYPE_TUBE 5 [ integer hole_shape, vector cut, float hollow, vector twist, vector hole_size, vector top_shear, vector advanced_cut, vector taper, float revolutions, float radius_offset, float skew ]
PRIM_TYPE_RING 6 [ integer hole_shape, vector cut, float hollow, vector twist, vector hole_size, vector top_shear, vector advanced_cut, vector taper, float revolutions, float radius_offset, float skew ]
PRIM_TYPE_SCULPT 7 [ string mapinteger type ] Sculpted_Prims:_FAQ
  hole_shape Flags Shape hole_shape Flags Shape
PRIM_HOLE_DEFAULT 0x00 Default PRIM_HOLE_SQUARE 0x20 Square
PRIM_HOLE_CIRCLE 0x10 Circle PRIM_HOLE_TRIANGLE 0x30 Triangle
type Flags Style Description
PRIM_SCULPT_TYPE_SPHERE 1 Sphere Converge top & bottom, stitch left side to right
PRIM_SCULPT_TYPE_TORUS 2 Torus Stitch top to bottom, stitch left side to right
PRIM_SCULPT_TYPE_PLANE 3 Plane No stitching or converging
PRIM_SCULPT_TYPE_CYLINDER 4 Cylinder Stitch left side to right.
PRIM_SCULPT_TYPE_A 5 Mesh model See: Mesh
PRIM_SCULPT_FLAG_ZZZZZZZZ 63
PRIM_SCULPT_FLAG_INVERT 0x40 Invert Render inside out (inverts the normals).
PRIM_SCULPT_FLAG_MIRROR 0x80 Mirror Render an X axis mirror of the sculpty.
PRIM_SLICE ] 35 [ vector slice ] Gets / Sets the prim's slice (a shape attribute).
PRIM_PHYSICS_SHAPE_TYPE ] 30 [ integer type ] Gets / Sets the prim's physics shape type.
type Flags V Description Notes
PRIM_PHYSICS_SHAPE_PRIM 0 The visible shape of the prim determines its physics-shape default for all non-mesh prims
PRIM_PHYSICS_SHAPE_CONVEX 2 Use the convex hull formulas for generating the prim's physics-shape default for all mesh prims
PRIM_PHYSICS_SHAPE_NONE 1 The prim will not contribute to the object's physics-shape This cannot be applied to the root prim or avatars.

This prim has no physics representation at all. Like phantom objects, it will not collide with avatars or other objects. Unlike phantom prims, it will also pass freely through the terrain when the parent object is physical. Like volume detect it doesn't collide with terrain. Unlike volume detect, it will not register collision events.

PRIM_MATERIAL ] 2 [ integer material ] Gets / Sets the prim's material. The material determines the default collision sound, sprite, friction coefficient and restitution coefficient.
material Flags Description Friction Restitution
PRIM_MATERIAL_STONE 0 stone 0.8 0.4
PRIM_MATERIAL_METAL 1 metal 0.3 0.4
PRIM_MATERIAL_GLASS 2 glass 0.2 0.7
PRIM_MATERIAL_WOOD 3 wood 0.6 0.5
PRIM_MATERIAL_FLESH 4 flesh 0.9 0.3
PRIM_MATERIAL_PLASTIC 5 plastic 0.4 0.7
PRIM_MATERIAL_RUBBER 6 rubber 0.9 0.9
PRIM_MATERIAL_LIGHT 7 light, DEPRECATED: Looks the same as [ PRIM_FULLBRIGHT, ALL_SIDES, TRUE ] 0.6 0.5
PRIM_PHYSICS ] 3 [ integer boolean ] Physics status llGetStatus / llSetStatus
PRIM_TEMP_ON_REZ ] 4 [ integer boolean ] Temporary attribute
PRIM_PHANTOM ] 5 [ integer boolean ] Phantom status llGetStatus / llSetStatus
PRIM_POSITION ] 6 [ vector position ] Position, llGetPos / llSetPos
PRIM_POS_LOCAL ] 33 [ vector position ] Local position, llGetLocalPos / llSetPos
PRIM_ROTATION ] 8 [ rotation rot ] Global rotation, llGetRot / llSetRot (broken for child prims)
PRIM_ROT_LOCAL ] 29 [ rotation rot ] Local rotation, llGetLocalRot / llSetLocalRot
PRIM_SIZE ] 7 [ vector size ] Size, llGetScale / llSetScale
PRIM_TEXTURE, integer face ] 17 [ string texture, vector repeats, vector offsets, float rotation_in_radians ]
Texture: llGetTexture llSetTexture
Repeats: llGetTextureScale llScaleTexture
Offset: llGetTextureOffset llOffsetTexture
Rotation: llGetTextureRot llRotateTexture
PRIM_TEXT ] 26 [ string text, vector color, float alpha ] Floating Text: NA / llSetText
PRIM_COLOR, integer face ] 18 [ vector color, float alpha ]
Alpha: llGetAlpha llSetAlpha
Color: llGetColor llSetColor
PRIM_BUMP_SHINY, integer face ] 19 integer shiny, integer bump ]
shiny & bump Flags Description
PRIM_SHINY_NONE 0 none
PRIM_SHINY_LOW 1 low
PRIM_SHINY_MEDIUM 2 medium
PRIM_SHINY_HIGH 3 high
PRIM_BUMP_NONE 0 none: no bump map
PRIM_BUMP_BRIGHT 1 brightness: generate from highlights
PRIM_BUMP_DARK 2 darkness: generate from lowlights
PRIM_BUMP_WOOD 3 woodgrain
PRIM_BUMP_BARK 4 bark
PRIM_BUMP_BRICKS 5 bricks
PRIM_BUMP_CHECKER 6 checker
PRIM_BUMP_CONCRETE 7 concrete
PRIM_BUMP_TILE 8 crustytile
PRIM_BUMP_STONE 9 cutstone: blocks
PRIM_BUMP_DISKS 10 discs: packed circles
PRIM_BUMP_GRAVEL 11 gravel
PRIM_BUMP_BLOBS 12 petridish: blobby amoeba like shapes
PRIM_BUMP_SIDING 13 siding
PRIM_BUMP_LARGETILE 14 stonetile
PRIM_BUMP_STUCCO 15 stucco
PRIM_BUMP_SUCTION 16 suction: rings
PRIM_BUMP_WEAVE 17 weave
PRIM_FULLBRIGHT, integer face ] 20 [ integer boolean ]
PRIM_FLEXIBLE ] 21 [ integer boolean, integer softness, float gravity, float friction, float wind, float tension, vector force ]
PRIM_TEXGEN, integer face ] 22 [ integer mode ]
mode Constants Description
PRIM_TEXGEN_DEFAULT 0 The texture repeats units are in texture repeats per face.
PRIM_TEXGEN_PLANAR 1 The texture repeats units are in texture repeats per half meter. This is in contrast to the in-world editing tool, in which the planar texture scaling units are repeats per meter.
PRIM_POINT_LIGHT ] 23 [ integer boolean, vector color, float intensity, float radius, float falloff ]
PRIM_GLOW, integer face ] 25 [ float intensity ]
PRIM_OMEGA ] 32 vector axis, float spinrate, float gain ] llTargetOmega
PRIM_NORMAL, integer face ] 37 string texture, vector repeats, vector offsets, float rotation_in_radians ]
PRIM_SPECULAR, integer face ] 36 string texture, vector repeats, vector offsets, float rotation_in_radians, vector color, integer glossiness integer environment ]
PRIM_ALPHA_MODE, integer face ] 38 integer alpha_mode, integer mask_cutoff ]
34 [] Multiple llGetLinkPrimitiveParams / llSetLinkPrimitiveParams calls.
PRIM_CAST_SHADOWS ] 24 [ integer boolean ] DEPRECATED: Shadow casting for the primitive
[ 1 ]
PRIM_TYPE_LEGACY[2]
1 [ integer flag] + flag_parameters
flag Constants Flag Parameters
PRIM_TYPE_BOX 0 [ vector cut, float hollow, float twist_end, vector top_size, vector top_shear ]
PRIM_TYPE_CYLINDER 1 [ vector cut, float hollow, float twist_end, vector top_size, vector top_shear ]
PRIM_TYPE_PRISM 2 [ vector cut, float hollow, float twist_end, vector top_size, vector top_shear ]
PRIM_TYPE_SPHERE 3 [ vector cut, float hollow, vector dimple ]
PRIM_TYPE_TORUS 4 [ vector cut, float hollow, float twist_end, float hole_size_y, vector top_shear, vector advanced_cut ]
PRIM_TYPE_TUBE 5 [ vector cut, float hollow, float twist_end, float topshear_x ]
PRIM_ALLOW_UNSIT ] 39
PRIM_SCRIPTED_SIT_ONLY ] 40
PRIM_SIT_TARGET ] 41

Caveats

  • This function causes the script to sleep for 0.2 seconds.
  • The prim description is limited to 127 bytes; any string longer then that will be truncated. This truncation does not always happen when the attribute is set or read.
  • The pipe character '|' and the newline character '\n' are not legal in a prim's description. They will be replaced with '?'.[3]
  • Note that when people have "Hover Tips on All Objects" selected in the viewer's "View" menu, they'll see the object description pop-up for any object under their mouse pointer. For that reason, it is good practice to only set human-friendly information in the description, e.g. keys and such.
  • When an attached object is detached, changes made by script to the name and description (of the root prim) of the attachment will be lost. While the object is attached the name and description can be changed but it will not be reflected in inventory. This caveat does not apply to child prims.
  • If texture is missing from the prim's inventory and it is not a UUID or it is not a texture then an error is shouted on DEBUG_CHANNEL.
  • If texture is a UUID then there are no new asset permissions consequences for the object.
    • The resulting object develops no new usage restrictions that might have occurred if the asset had been placed in the prims inventory.
  • repeats is not only used to set the number of repeats but the sign of the individual components is also used to set the "Flip" attribute.
  • In the default texture mapping mode the texture repeats units are in texture repeats per face. In the planar texture mapping mode the texture repeats units are in texture repeats per half meter. This is in contrast to the in-world editing tool, in which the planar texture scaling units are repeats per meter.
  • Do not rely on Floating Text as a storage medium; it is neither secure nor finalized.
    • Floating text has been altered in past server updates, breaking existing content; future changes may occur.
    • Even "invisible"[4] floating text is transmitted to the client.
      • It can be viewed by anyone with a client that is capable of rendering text that is supposed to be invisible.
      • The network packets that contain the text can be sniffed and the text read.
  • top_size and client values are different, the ranges do not line up, conversion is required. This simple equation can be used: answer = 1.0 - value. See top_size Explained for more information.
  • PRIM_OMEGA on nonphysical objects, and child prims of physical objects, is only a client side effect; the object or prim will collide as non-moving geometry.
  • PRIM_OMEGA cannot be used on avatars sitting on the object. It will emit the error message "PRIM_OMEGA disallowed on agent".
  • If PRIM_OMEGA does not appear to be working, make sure that that Develop > Network > Velocity Interpolate Objects is enabled on the viewer.
  • If texture is missing from the prim's inventory and it is not a UUID or it is not a texture then an error is shouted on DEBUG_CHANNEL.
  • If texture is a UUID then there are no new asset permissions consequences for the object.
    • The resulting object develops no new usage restrictions that might have occurred if the asset had been placed in the prims inventory.
  • repeats is not only used to set the number of repeats but the sign of the individual components is also used to set the "Flip" attribute.
  • To clear the normal map parameters from the face (and possibly remove the material), set texture to NULL_KEY (the other parameters must be supplied in this case but will be ignored).
  • Note that whenever any face in a linkset contains a material (i.e. has a non-default PRIM_NORMAL, PRIM_SPECULAR, or PRIM_ALPHA_MODE), the linkset will use the new accounting system.
  • In the default texture mapping mode the texture repeats units are in texture repeats per face. In the planar texture mapping mode the texture repeats units are in texture repeats per half meter. This is in contrast to the in-world editing tool, in which the planar texture scaling units are repeats per meter.
  • If texture is missing from the prim's inventory and it is not a UUID or it is not a texture then an error is shouted on DEBUG_CHANNEL.
  • If texture is a UUID then there are no new asset permissions consequences for the object.
    • The resulting object develops no new usage restrictions that might have occurred if the asset had been placed in the prims inventory.
  • repeats is not only used to set the number of repeats but the sign of the individual components is also used to set the "Flip" attribute.
  • To clear the specular map parameters from the face (and possibly remove the material), set texture to NULL_KEY (the other parameters must be supplied in this case but will be ignored).
  • Note that whenever any face in a linkset contains a material (i.e. has a non-default PRIM_NORMAL, PRIM_SPECULAR, or PRIM_ALPHA_MODE), the linkset will use the new accounting system.
  • In the default texture mapping mode the texture repeats units are in texture repeats per face. In the planar texture mapping mode the texture repeats units are in texture repeats per half meter. This is in contrast to the in-world editing tool, in which the planar texture scaling units are repeats per meter.
  • If PRIM_LINK_TARGET's link_target describes a seated avatar...
  • If face is ALL_SIDES then the flag works on all sides.
  • The flag silently fails if its face value indicates a face that does not exist.
  • Applying an operation to LINK_SET is applied first to the root prim, then to each child prim.

Important Issues

~ All Issues ~ Search JIRA for related Bugs
   We need PRIM_ALPHA_MODE_DEFAULT to revert alpha to old "if the texture has an alpha mask, use alpha. If not, don't" behavior.

Examples

Notes

Link Numbers

Each prim that makes up an object has an address, a link number. To access a specific prim in the object, the prim's link number must be known. In addition to prims having link numbers, avatars seated upon the object do as well.

  • If an object consists of only one prim, and there are no avatars seated upon it, the (root) prim's link number is zero.
  • However, if the object is made up of multiple prims or there is an avatar seated upon the object, the root prim's link number is one.

When an avatar sits on an object, it is added to the end of the link set and will have the largest link number. In addition to this, while an avatar is seated upon an object, the object is unable to link or unlink prims without unseating all avatars first.

Counting Prims & Avatars

There are two functions of interest when trying to find the number of prims and avatars on an object.

integer GetPrimCount() { //always returns only the number of prims
    if(llGetAttached())//Is it attached?
        return llGetNumberOfPrims();//returns avatars and prims but attachments can't be sat on.
    return llGetObjectPrimCount(llGetKey());//returns only prims but won't work on attachments.
}
See llGetNumberOfPrims for more about counting prims and avatars.

Errata

If a script located in a child prim erroneously attempts to access link 0, it will get or set the property of the linkset's root prim. This bug (BUG-5049) is preserved for broken legacy scripts.

See Also

Functions

•  llGetLinkNumber Returns the link number of the prim the script is in.
•  llSetPrimitiveParams Set many primitive parameters
•  llGetPrimitiveParams Get many primitive parameters
•  llSetLinkAlpha
•  llSetLinkColor

Articles

•  Limits SL limits and constrictions
•  Color in LSL
•  Translucent Color
•  Color in LSL
•  Translucent Color

Deep Notes

PRIM_TYPE top_size and client taper conversion
Range[5] Top
Tapered
No
Tapering
Bottom
Tapered
Client [-1, 1] 1.0 0.0 -1.0
PRIM_TYPE [0, 2] 0.0 1.0 2.0
LEGACY [0, 1] 0.0 1.0 NA
Client < 1.11 [0, 1] 0.0 1.0 NA

top_size Explained

When the original PRIM_TYPE interface was retired (PRIM_TYPE_LEGACY, SL 1.5), the new PRIM_TYPE interface did not yet support tapering of the bottom of the prim, this feature wasn't added until SL 1.11 (two years later). Instead of retiring the new PRIM_TYPE when it was added, the range of top_size was enlarged; meanwhile in the client they redefined the parameter and it's values. This redefinition and range enlargement resulted in two interfaces that did the same thing but achieved it through different values. Meanwhile PRIM_TYPE_LEGACY's interface was not updated to support tapering of the bottom of the prim. Consequently all three interfaces have different ranges, making for a rather nasty caveat.

All Issues

~ Search JIRA for related Issues
   CHANGED_TEXTURE is not triggered when texture is changed via script
   We need PRIM_ALPHA_MODE_DEFAULT to revert alpha to old "if the texture has an alpha mask, use alpha. If not, don't" behavior.

Footnotes

  1. ^ LINK_ROOT does not work on single prim objects. Unless there is an avatar sitting on the object.
  2. ^ When LL deprecated this flag they stripped it of it's name, however they did not remove the functionality. To aid in documenting the functionality, the value was given a new name in the documentation only. That is why PRIM_TYPE_LEGACY is not recognized by the compiler.
  3. ^ The pipe character historically has been used to separate fields in the serialized version of inventory. The field is not multi-line so the newline character holds no meaning in this context.
  4. ^ Floating text with an alpha set to 0.0 is rendered "invisible"
  5. ^ The ranges in this article are written in Interval Notation.

Signature

function void llSetLinkPrimitiveParams( integer linknumber, list rules );