Function updateCamera

example/util/camera.js:62–94

()

  }

  function updateCamera () {
    var center = cameraState.center
    var eye = cameraState.eye
    var up = cameraState.up

    cameraState.theta += dtheta
    cameraState.phi = clamp(
      cameraState.phi + dphi,
      -Math.PI / 2.0,
      Math.PI / 2.0)
    cameraState.distance = clamp(
      cameraState.distance + ddistance,
      minDistance,
      maxDistance)

    dtheta = damp(dtheta)
    dphi = damp(dphi)
    ddistance = damp(ddistance)

    var theta = cameraState.theta
    var phi = cameraState.phi
    var r = Math.exp(cameraState.distance)

    var vf = r * Math.sin(theta) * Math.cos(phi)
    var vr = r * Math.cos(theta) * Math.cos(phi)
    var vu = r * Math.sin(phi)

    for (var i = 0; i < 3; ++i) {
      eye[i] = center[i] + vf * front[i] + vr * right[i] + vu * up[i]
    }

    lookAt(cameraState.view, eye, center, up)
  }

  var injectContext = regl({
    context: Object.assign({}, cameraState, {