Gamepad.axes - Web APIs 编辑

The Gamepad.axes property of the Gamepad interface returns an array representing the controls with axes present on the device (e.g. analog thumb sticks).

Each entry in the array is a floating point value in the range -1.0 – 1.0, representing the axis position from the lowest value (-1.0) to the highest value (1.0).

Syntax

readonly    attribute double[]            axes;

Example

function gameLoop() {
  if(navigator.webkitGetGamepads) {
    var gp = navigator.webkitGetGamepads()[0];
  } else {
    var gp = navigator.getGamepads()[0];
  }

  if(gp.axes[0] != 0) {
    b -= gp.axes[0];
  } else if(gp.axes[1] != 0) {
    a += gp.axes[1];
  } else if(gp.axes[2] != 0) {
    b += gp.axes[2];
  } else if(gp.axes[3] != 0) {
    a -= gp.axes[3];
  }

  ball.style.left = a*2 + "px";
  ball.style.top = b*2 + "px";

  var start = rAF(gameLoop);
};

Value

An array of double values.

Specifications

Browser compatibility

BCD tables only load in the browser

See also

Using the Gamepad API