Function buildSegment

buildSegment(
    point: vec3,
    prevSegment: vec3,
    tangent: vec3,
    uv_v: number,
): number[]
Builds a segment of the line using its MeshBuilder
Parameters
- point: vec3
  the position coordinates for the point
- prevSegment: vec3
- tangent: vec3
  of the connecting line segments
- uv_v: number
  desired v coordinate for the vertex's uv map vertices are shifted for thickness in the shader
Returns number[]