Function createCamera

stackgl_modules/index.js:18105–18372

(element, options)

var hasPassive  = __webpack_require__(7520)

function createCamera(element, options) {
  element = element || document.body
  options = options || {}

  var limits  = [ 0.01, Infinity ]
  if('distanceLimits' in options) {
    limits[0] = options.distanceLimits[0]
    limits[1] = options.distanceLimits[1]
  }
  if('zoomMin' in options) {
    limits[0] = options.zoomMin
  }
  if('zoomMax' in options) {
    limits[1] = options.zoomMax
  }

  var view = createView({
    center: options.center || [0,0,0],
    up:     options.up     || [0,1,0],
    eye:    options.eye    || [0,0,10],
    mode:   options.mode   || 'orbit',
    distanceLimits: limits
  })

  var pmatrix = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
  var distance = 0.0
  var width   = element.clientWidth
  var height  = element.clientHeight

  var camera = {
    keyBindingMode: 'rotate',
    enableWheel: true,
    view:               view,
    element:            element,
    delay:              options.delay          || 16,
    rotateSpeed:        options.rotateSpeed    || 1,
    zoomSpeed:          options.zoomSpeed      || 1,
    translateSpeed:     options.translateSpeed || 1,
    flipX:              !!options.flipX,
    flipY:              !!options.flipY,
    modes:              view.modes,
    _ortho: options._ortho || (options.projection && options.projection.type === 'orthographic') || false,
    tick: function() {
      var t = now()
      var delay = this.delay
      var ctime = t - 2 * delay
      view.idle(t-delay)
      view.recalcMatrix(ctime)
      view.flush(t-(100+delay*2))
      var allEqual = true
      var matrix = view.computedMatrix
      for(var i=0; i<16; ++i) {
        allEqual = allEqual && (pmatrix[i] === matrix[i])
        pmatrix[i] = matrix[i]
      }
      var sizeChanged =
          element.clientWidth === width &&
          element.clientHeight === height