Difference between revisions of "Interpolation/Linear/Vectors"

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m (<lsl> tag to <source>)
 
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{{LSL_Function
{{LSL_Function
|mode=user
|mode=user
|func=vLin
|func=pLin
|p1_type=list|p1_name=v
|p1_type=list|p1_name=v
|p2_type=float|p2_name=t
|p2_type=float|p2_name=t|p2_desc=Ranges between [0, 1]
|p3_type=integer|p3_name=Loop
|p3_type=integer|p3_name=Loop|p3_desc=Whether the list is a curved line or loops into a closed shape.
|return_type=vector
|return_type=vector
|return_value=returns the interpolation of a list of vectors.
|return_value=returns the interpolation of a list of vectors.
|func_desc=
|func_desc=
Linearly interpolates between two vector points in a list of vectors that define a path.
Linearly interpolates between two vector points in a list of vectors that define a path.
|spec=<lsl>vector pLin(list v, float t, integer Loop){
|spec=<source lang="lsl2">vector pLin(list v, float t, integer Loop) {
  float l = llGetListLength(v); t *= l-1;
    integer l = llGetListLength(v); t *= l-1;
  float f = (float)llFloor(t);
    integer f = llFloor(t); t -= f;
  integer i1 = 0; integer i2 = 0;
    return llList2Vector(v,pIndex(f,l,Loop))*(1-t) + llList2Vector(v,pIndex(f+1,l,Loop))*t;
  if(Loop){ i1 = (integer)(f-llFloor(f/l)*l);
        ++f;i2 = (integer)(f-llFloor(f/l)*l);
  } else {
    if( f > l-1 ) i1 = (integer)l-1;
    else if(  f >= 0 ) i1 = (integer)f;
    if(f+1 > l-1 ) i2 = (integer)l-1;
    else if(f+1 >= 0 ) i2 = (integer)f+1;
  }
  vector v1 = llList2Vector(v, i1);
  vector v2 = llList2Vector(v, i2);
  t-=f;
  return v1*(1-t) + v2*t;
}
}
// Released into public domain. By Nexii Malthus.</lsl>
integer pIndex( integer Index, integer Length, integer Loop) {
|examples=<lsl></lsl>
    if(Loop) return Index % Length;
    if(Index < 0) return 0;
    if(Index > --Length) return Length;
    return Index;
}
// Released into public domain. By Nexii Malthus.</source>
|examples=<source lang="lsl2"></source>
|cat1=Examples
|cat1=Examples
}}
}}

Latest revision as of 15:06, 24 January 2015

Summary

Function: vector pLin( list v, float t, integer Loop );

Linearly interpolates between two vector points in a list of vectors that define a path.
Returns a vector

• list v
• float t – Ranges between [0, 1]
• integer Loop – Whether the list is a curved line or loops into a closed shape.

Specification

vector pLin(list v, float t, integer Loop) {
    integer l = llGetListLength(v); t *= l-1;
    integer f = llFloor(t); t -= f;
    return llList2Vector(v,pIndex(f,l,Loop))*(1-t) + llList2Vector(v,pIndex(f+1,l,Loop))*t;
}
integer pIndex( integer Index, integer Length, integer Loop) {
    if(Loop) return Index % Length;
    if(Index < 0) return 0;
    if(Index > --Length) return Length;
    return Index;
}
// Released into public domain. By Nexii Malthus.

Examples

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