Houdini - VEX samples

//CREATE LINE WITH MULTIPLE POINTS
int pointCount = chi("Point_Count");
int points[];

resize(points, pointCount);

for   (int i=0; i < pointCount; i++)
{
    vector curPos = set(0,i,0);
    int curPointId = addpoint(geoself(), curPos);
    points[i] = curPointId;
    }

for(int i=0; i<pointCount-1; i++;
{
    addprim(geoself(), "polyline", points[i], points[i+1]);
    }

//addprim(geoself(), "polyline", points);

===========================================================================
//RECREATING LINE NODE
float length = ch("Length");
int pointCount = chi("Points");
vector dir = chv("Division");
vector offset = chv("Offset");

dir = normalize(dir);
int points[];
resize(points, pointCount);

float stepVal = length/(float)(pointCount-1);

for(int i=0; i<pointCount; i++)
{
    vector pointPos = (dir) * (stepVal*i) + offset;
    int cutID = addpoint(geoself(), pointPos);
    points[i] = curID;
    }

addprim(geoself(), "polyline", points);
===========================================================================

AE - PointAt

1) Create 3 nulls: Null_PointAt, Null_Base, Null_Target
2) Set the following transform expressions on Null_PointAt:

Position:
thisComp.layer("Null_Base").transform.position

Scale:
point1 = thisComp.layer("Null_Base").transform.position;
point2 = thisComp.layer("Null_Target").transform.position;
scl=length(point1, point2);
[scl, scl]

Rotation:
fromPoint = thisComp.layer("Null_Base").transform.position;
atPoint = thisComp.layer("Null_Target").transform.position;
Pointer3=lookAt(fromPoint, atPoint);
if(atPoint[1]<fromPoint[1]) [Pointer3[1]]-180; else [-Pointer3[1]];