0008353: Incorrect handling of radiusoffset in setprimitiveshapeparams

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Date Submitted

Last Update

0008353

opensim

[REGION] Script Functions

public

2018-08-09 20:58

2018-08-10 18:17

Reporter

realtime

Assigned To

Priority

normal

Severity

minor

Reproducibility

always

Status

new

Resolution

open

Platform

OpenSim server

FreeBSD

OS Version

11.2

Product Version

0.9.0.1

Target Version

Fixed in Version

Summary

0008353: Incorrect handling of radiusoffset in setprimitiveshapeparams

Description

OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs around line 8537, this block of code is incorrect:

            // limits on radiusoffset depend on revolutions and hole size (how?) seems like the maximum range is 0 to 1
            if (radiusoffset < 0f)
            {
                radiusoffset = 0f;
            }
            if (radiusoffset > 1f)
            {
                radiusoffset = 1f;
            }
            tempFloat = 100.0f * radiusoffset;
            shapeBlock.PathRadiusOffset = (sbyte)tempFloat;

Actual behaviour should be to limit the radiusoffset to the range 0 to taper.y. The radiusoffset must be zero or negative if taper.y is negative, and zero or positive if taper.y is positive.

Steps To Reproduce

1. create a prim
2. add the following script:

default
{
    state_entry()
    {
        list p = [9, 4, 0, <0,1,0>, 0.0, <0,0,0>, <.5,.5,0>, <0,0,0>, <0,1,0>, <-1,-1,0>, 1.0, -0.7, 0.0];
        llSetLinkPrimitiveParamsFast(0, p);
    }
}

3. allow the script to run
4. edit the prim and look at the object parameters - Radius is zero
5. manually adjusting the radius will show it can only be set to negative values
6. manually changing taper y to be closer to zero than radius will show that radius is automatically updated to be equal to taper y to keep it in range

Additional Information

suggested replacement code:

if (taper_a.y < 0f)
{
  if (radiusoffset < taper_a.y)
  {
    radiusoffset = taper_a.y;
  }
  if (radiusoffset > 0f)
  {
    radiusoffset = 0f;
  }
}
else
{
  if (radiusoffset > taper_a.y)
  {
    radiusoffset = taper_a.y;
  }
  if (radiusoffset < 0f)
  {
    radiusoffset = 0f;
  }
}

Tags

llSetPrimitiveParams, scripting

Git Revision or version number

0.9.0.1 binary release

Run Mode

Grid (Multiple Regions per Sim)

Physics Engine

ubODE

Script Engine

Environment

Mono / Linux64

Mono Version

5.x

Viewer

Firestorm 5.1.7

Attached Files

Relationships

Notes
(0032852) realtime (reporter) 2018-08-10 18:17	On further experimentation, I have encountered a prim where the taper.y is positive, but the radius offset is negative, so my suggested code fix is not correct. Might be easiest to just let the parameter range from -1.0 to 1.0 and it seems it will get clamped to the correct range somewhere else in the simulator code.

Issue History
Date Modified	Username	Field	Change
2018-08-09 20:58	realtime	New Issue
2018-08-09 21:01	realtime	Tag Attached: llSetPrimitiveParams
2018-08-09 21:01	realtime	Tag Attached: scripting
2018-08-10 18:17	realtime	Note Added: 0032852