Function horizonY

horizonY(height: number, maxAltitude?: number): number
The y coordinate of the horizon line (altitude 0°) in the arc's SVG box.
Parameters
- height: number
  Drawing height in SVG user units (px).
- maxAltitude: number = 75
  Altitude in degrees that maps to the top of the box. Default 75.
Returns number
The horizon y coordinate; equivalent to altToY(0, height, maxAltitude).