Applying Textures and Simple Animations to Our Scene - WebGL Game Development - page 226

The start function initializes the BsplineInterpolation object, and it calculates
the interpolates and stores them in its position array. In the next line, we simply
copy its value to the grenadePositions array. Then, the start function loads the
left hand and grenade JSON models.
function start() {
...
var splineInterpolation=new BSplineInterpolation(grenadeControlPoin
ts);
grenadePositions=splineInterpolation.position;
...
loadStageObject("model/weapons/leftHand.json",[0.0,20.0,-
150.0],0.0,0.0,0.0);
loadStageObject("model/weapons/grenade.json",[0.0,20.0,-
150.0],0.0,0.0,0.0);
...
}
The loadStageObject function checks the loaded object type, and then
creates the objects for LeftHand and Grenade . The leftHand object's property
grenadeCallback is initialized with a reference of the initializeGrenade function
of our main code. It is invoked once the hand animations have been executed.
function
loadStageObject(url,location,rotationX,rotationY,rotationZ){
...
else if(nameOfObject=="leftHand"){
stageObject=new LeftHand();
leftHand=stageObject;
leftHand.grenadeCallback=initializeGrenade;
}
...
else if(nameOfObject=="grenade"){
stageObject=new Grenade();
grenade=stageObject;
}
...
}