Recipes

Main Branch Generation Function Example

function generateMainBranch(this: MindElixirInstance, { x1, y1, x2, y2, direction }: MainLineParams) {
  const root = this.map.querySelector('me-root') as HTMLElement
  if (this.direction === SIDE) {
    if (direction === 'lhs') {
      x1 = x1 - root.offsetWidth / 8
    } else {
      x1 = x1 + root.offsetWidth / 8
    }
  }
  return `M ${x1} ${y1} V ${y2 > y1 ? y2 - 20 : y2 + 20} C ${x1} ${y2} ${x1} ${y2} ${x2 > x1 ? x1 + 20 : x1 - 20} ${y2} H ${x2}`
}

Sub Branch Generation Function Example

function generateSubBranch(this: MindElixirInstance, { pT, pL, pW, pH, cT, cL, cW, cH, direction, isFirst }: SubLineParams) {
  const GAP = 30
  const TURNPOINT_R = 8
  let y1: number
  if (isFirst) {
    y1 = pT + pH / 2
  } else {
    y1 = pT + pH
  }
  const y2 = cT + cH
  let x1 = 0
  let x2 = 0
  let xMiddle = 0
  if (direction === 'lhs') {
    x1 = pL + GAP
    x2 = cL
    xMiddle = cL + cW
  } else if (direction === 'rhs') {
    x1 = pL + pW - GAP
    x2 = cL + cW
    xMiddle = cL
  }

  if (y2 < y1 + 50 && y2 > y1 - 50) {
    // draw straight line if the distance is between +-50
    return `M ${x1} ${y1} H ${xMiddle} V ${y2} H ${x2}`
  } else if (y2 >= y1) {
    // child bottom lower than parent
    return `M ${x1} ${y1} H ${xMiddle} V ${y2 - TURNPOINT_R} A ${TURNPOINT_R} ${TURNPOINT_R} 0 0 ${x1 > x2 ? 1 : 0} ${
      x1 > x2 ? xMiddle - TURNPOINT_R : xMiddle + TURNPOINT_R
    } ${y2} H ${x2}`
  } else {
    // child bottom higher than parent
    return `M ${x1} ${y1} H ${xMiddle} V ${y2 + TURNPOINT_R} A ${TURNPOINT_R} ${TURNPOINT_R} 0 0 ${x1 > x2 ? 0 : 1} ${
      x1 > x2 ? xMiddle - TURNPOINT_R : xMiddle + TURNPOINT_R
    } ${y2} H ${x2}`
  }
}