@onirix/camera-controls-module

Onirix Camera Controls Module

This library is an addon to Onirix Embed SDK that allows manipulating the camera in a more intuitive and direct way to perform effects such as:

• Camera animations when entering a scene.
• Moving the camera to different points of interests around the scene.
• Advanced camera controls, e.g., zoom customization using interface elements.
• Restricting camera movement in some ways.

Usage

Initialization

Before accessing any of its functions, the camera module must be initialized by providing an instance of the Onirix Embed SDK as shown below:

import OnirixEmbedSDK from 'https://www.unpkg.com/@onirix/embed-sdk@latest/dist/ox-embed-sdk.esm.js';
import OnirixCameraModule from 'https://www.unpkg.com/@onirix/camera-controls-module@latest/dist/ox-camera-controls-module.esm.js';

const embedSDK = new OnirixEmbedSDK();
embedSDK.connect();

const camera = new OnirixCameraModule(embedSDK);

Camera manipulation and animations

The camera can be moved using the camera.animate(...) function. This function receives the following parameters:

• position_x, position_y, and position_z: The coordinates the camera should move to. If any of them is undefined, the camera will stay in place.
• look_at_x, look_at_y, and look_at_z: The coordinates the camera should look at. If any of them is undefined, the camera will keep looking at the point it is currently looking at.
• mode: How to animate the transition to these positions. It is specified by a string with two components: an interpolator (a component that describes the path the camera should take) and an easing function (a component that describes the speed of the camera along said path). This string must be formated as '<interpolator> <ease function>'. Alternatively, any of the components can be omitted. If the mode is optional (can be undefined).

There are two interpolators available:

• linear: The camera moves in a straight line.
• spherical: The camera moves following and arc around a center.

There are seven easing functions available:

• linear-in-out: The camera moves always at the same speed.
• ease-in: The camera starts slower.
• ease-out: The camera reduces its speed as it reaches its destination.
• ease-in-out: The camera starts accelerates at the begining and decelerates as it reaches the end.
• bounce-in: The camera anticipates the movement by going in the opposite direction for a short period of time.
• bounce-out: The camera overshoots the destination for a short period of time.
• bounce-in-out: The camera anticipates the movement by going in the opposite direction and overshoots the destination for a short period of time.

Some examples of valid modes are 'linear', 'ease-in-out', 'spherical bounce-out'.

• time: Length of the animation in seconds. If not provided it is assumed to be 0 .
• center_x, center_y, and center_z: When using a spherical interpolator, the center of the arc. Otherwise it is ignored.

Controls

The camera controls are the components that describe how user interactions (touches, mouse clicks, key presses...) are translated to camera movements around the scene. Camera controls are optional and you may use none if the camera cannot be controlled by the user.

Currently, the camera module supports the following camera controls:

• Orbit controls: The camera moves around a point (the target). The user can zoom using the mouse wheel or by doing pinch gestures, pan by dragging while pressing right mouse botton or sliding with two fingers, and cycle around by dragging while pressing left mouse button or sliding with a single finger. They can be enabled using camera.enableOrbitControls().

The function camera.disableControls() can be used to disable the current camera controls.

Orbit controls

Some functions allow setting limits to the transformations that the user can perform:

• camera.setOrbitControlsPanRange(min_x, max_x, min_y, max_y, min_z, max_z) allows setting a minimum and maximum pan value for each of the coordinate axes.
• camera.setOrbitControlsRotateRange(min_x, max_x, min_y, max_y, min_z, max_z) allows setting a minimum and maximum rotation value for each of the coordiante axes. This rotation is measured as the angle from the camera to the axis.
• camera.setOrbitControlsZoomRange(min, max) allows setting a minimum and maximum zoom value.

Also, there is a function that allows setting the orbit target: camera.setOrbitControlsTarget(x, y, z).

Examples

Moving to a position on scene load

import OnirixEmbedSDK from 'https://www.unpkg.com/@onirix/embed-sdk@latest/dist/ox-embed-sdk.esm.js';
import OnirixCameraModule from 'https://www.unpkg.com/@onirix/camera-controls-module@latest/dist/ox-camera-controls-module.esm.js';

const embedSDK = new OnirixEmbedSDK();
embedSDK.connect();

const camera = new OnirixCameraModule(embedSDK);
camera.enableOrbitControls();

embedSDK.subscribe(OnirixEmbedSDK.Events.SCENE_LOAD_END, () => {
    camera.animateTo(
      -1, 0, 1,
      1, 0, -1,
      'spherical ease-in-out',
      5
    );
});

An orbit and zoom animation on scene load

import OnirixEmbedSDK from 'https://www.unpkg.com/@onirix/embed-sdk@latest/dist/ox-embed-sdk.esm.js';
import OnirixCameraModule from 'https://www.unpkg.com/@onirix/camera-controls-module@latest/dist/ox-camera-controls-module.esm.js';

const embedSDK = new OnirixEmbedSDK();
embedSDK.connect();

const camera = new OnirixCameraModule(embedSDK);
camera.enableOrbitControls();

embedSDK.subscribe(OnirixEmbedSDK.Events.SCENE_LOAD_END, async () => {
    await camera.animateTo(
        0, 0.5, -5,
        0, 0.5, 0
    );
    await camera.animateTo(
        0, 0.5, 5,
        0, 0.5, 0,
        'spherical ease-in-out',
        2,
        0, 0.5, 0
    );
    await camera.animateTo(
        0, 0.5, 2,
        0, 0.5, 0,
        'linear ease-in-out',
        2,
        0, 0.5, 0
    );
});