* Update the game frame and schedules the next one.

* Set the animation status. * @param {!number} deltaTime * @param {Trex.status} status Optional status to switch to.

* Reset the t-rex to running at start of game.

* Draw the t-rex to a particular position. * @param {number} x * @param {number} y

* @param {boolean} isDucking.

* Add a new cloud to the horizon.

* Draw a digit to canvas. * @param {number} digitPos Position of the digit. * @param {number} value Digit value 0-9. * @param {boolean} highS

* Add a new obstacle. * @param {number} currentSpeed

* Compare two collision boxes for a collision. * @param {CollisionBox} tRexBox * @param {CollisionBox} obstacleBox * @return {boolean} Whether the

* Calculate the xPos in the canvas. * @param {number} canvasWidth

* Adjust the collision box. * @param {!CollisionBox} box The original box. * @param {!CollisionBox} adjustment Adjustment box. * @return {Collision

* Draw the cloud.

* Draw the horizon line.

* Draw and crop based on size.

* Jump is complete, falling down.

* Covert pixel distance to a 'real' distance. * @param {number} distance Pixel distance ran. * @return {number} The 'real' distance ran.

* Check if the cloud is visible on the stage. * @return {boolean}

* Sets a random time for the blink to happen.

* Sets the game speed. Adjust the speed accordingly if on a smaller screen. * @param {number} speed

* Set the speed drop. Immediately cancels the current jump.

* Initialise a jump. * @param {number} speed

* @param {number} deltaTime * @param {number} currentSpeed * @param {boolean} updateObstacles Used as an override to prevent * the obstac

* Updates the canvas size taking into * account the backing store pixel ratio and * the device pixel ratio. * * See article by Paul Lewis:

* Update the x position of an indivdual piece of the line. * @param {number} pos Line position. * @param {number} increment

* Adjust game space dimensions on resize.

* Make t-rex blink at random intervals. * @param {number} time Current time in milliseconds.

* Make a copy of the collision boxes, since these will change based on * obstacle type and size.

* Create canvas element. * @param {HTMLElement} container Element to append canvas to. * @param {number} width * @param {number} height * @param {

* Draw the high score.

* Returns whether the previous two obstacles are the same as the next one. * Maximum duplication is set in config value MAX_OBSTACLE_DUPLICATION.

* Game over state.

* Calculate a random gap size. * - Minimum gap gets wider as speed increses * @param {number} gapCoefficient * @param {number} speed * @re

* Return the crop x position of a type.

* Initialise the distance meter to '00000'. * @param {number} width Canvas width in px.

* Initialise the cloud. Sets the Cloud height.

* T-rex player initaliser. * Sets the t-rex to blink at random intervals.

* Initialise the horizon. Just add the line and a cloud. No obstacles.

* Whether the game is running. * @return {boolean}

* Check if obstacle is visible. * @return {boolean} Whether the obstacle is in the game area.

* Process keydown. * @param {Event} e

* Process key up. * @param {Event} e

* RequestAnimationFrame wrapper.

* Set the highscore as a array string. * Position of char in the sprite: H - 10, I - 11. * @param {number} distance Distance ran in pixels.

* Set the source dimensions of the horizon line.

* Update the game status to started.

* Bind relevant key

* Update the distance meter. * @param {number} distance * @param {number} deltaTime

* Update the cloud positions. * @param {number} deltaTime * @param {number} currentSpeed

* Update frame for a jump. * @param {number} deltaTime * @param {number} speed

* Update the obstacle positions. * @param {number} deltaTime * @param {number} currentSpeed

* Debounce the resize event.