ZoomInNavigationControl.prototype.zoomIn = function() {
this.terria.analytics.logEvent('navigation', 'click', 'zoomIn');
this.isActive = true;
if (defined(this.terria.leaflet)) {
this.terria.leaflet.map.zoomIn(1);
}
if (defined(this.terria.cesium)) {
var scene = this.terria.cesium.scene;
var camera = scene.camera;
var focus = this.getCameraFocus(scene);
var direction = Cartesian3.subtract(focus, camera.position, cartesian3Scratch);
var movementVector = Cartesian3.multiplyByScalar(direction, 2.0 / 3.0, cartesian3Scratch);
var endPosition = Cartesian3.add(camera.position, movementVector, cartesian3Scratch);
this.flyToPosition(scene, endPosition);
}
this.terria.currentViewer.notifyRepaintRequired();
this.isActive = false;
};
CameraView.fromLookAt = function(targetPosition, headingPitchRange) {
if (!defined(targetPosition)) {
throw new DeveloperError('targetPosition is required.');
}
if (!defined(headingPitchRange)) {
throw new DeveloperError('headingPitchRange is required.');
}
var positionENU = offsetFromHeadingPitchRange(headingPitchRange.heading, -headingPitchRange.pitch, headingPitchRange.range, scratchPosition);
var directionENU = Cartesian3.normalize(Cartesian3.negate(positionENU, scratchDirection), scratchDirection);
var rightENU = Cartesian3.cross(directionENU, Cartesian3.UNIT_Z, scratchRight);
if (Cartesian3.magnitudeSquared(rightENU) < CesiumMath.EPSILON10) {
Cartesian3.clone(Cartesian3.UNIT_X, rightENU);
}
Cartesian3.normalize(rightENU, rightENU);
var upENU = Cartesian3.cross(rightENU, directionENU, scratchUp);
Cartesian3.normalize(upENU, upENU);
var targetCartesian = Ellipsoid.WGS84.cartographicToCartesian(targetPosition, scratchTarget);
var transform = Transforms.eastNorthUpToFixedFrame(targetCartesian, Ellipsoid.WGS84, scratchMatrix4);
var offsetECF = Matrix4.multiplyByPointAsVector(transform, positionENU, scratchOffset);
var position = Cartesian3.add(targetCartesian, offsetECF, new Cartesian3());
var direction = Cartesian3.normalize(Cartesian3.negate(offsetECF, new Cartesian3()), new Cartesian3());
var up = Matrix4.multiplyByPointAsVector(transform, upENU, new Cartesian3());
// Estimate a rectangle for this view.
var fieldOfViewHalfAngle = CesiumMath.toRadians(30);
var groundDistance = Math.tan(fieldOfViewHalfAngle) * (headingPitchRange.range + targetPosition.height);
var angle = groundDistance / Ellipsoid.WGS84.minimumRadius;
var extent = new Rectangle(targetPosition.longitude - angle, targetPosition.latitude - angle, targetPosition.longitude + angle, targetPosition.latitude + angle);
return new CameraView(extent, position, direction, up);
};