Game Development Reference
In-Depth Information
Using linear interpolation for left-hand rotation
We want to throw the grenade when the
Enter
key is pressed. Let's first go over the
class to handle the animation of the left hand.
Open the
LeftHand.js
file from the
primitive/game
folder of the code bundle in
your text editor.
The
LeftHand
class also inherits
StageObject
. We have defined some new properties
(
rotations
,
counter
, and
grenadeCallBack
). The
rotations
array holds the angles
that we need to interpolate on. The integer
counter
maintains number of times the
update
function has been invoked. The variable
grenadeCallback
, holds the reference
to the function that has to be invoked once the animation has finished. The constructor
initializes the
rotations
array with values from 90 to 75 degrees. The
visible
property has been initialized to false to avoid rendering of the left arm initially:
LeftHand= inherit(StageObject, function (){
superc(this);
this.rotations=[];
for(var j=90.0;j>=75.0;--j){
