Looking at a sample program, I noticed that they are using some mathematical calculations to determine the position of the Sphere. Specifically, they are utilizing THREE.Math.mapLinear(). For instance, if the parameters passed are:
var x = THREE.Math.mapLinear(-70.16, -150, 150, 0, 1366);
the value of x is resulting in 363.51.
Could someone clarify what exactly is going on here?
Explaining the mapLinear function, which computes equivalent positions in different number ranges:
mapLinear: function ( x, a1, a2, b1, b2 ) {
return b1 + ( x - a1 ) * ( b2 - b1 ) / ( a2 - a1 );
}
This function determines the position of x within range a and then calculates its corresponding position in range b.
For example, if -70.16 is approximately one quarter (23.387%) between -150 and 150, the function will give back 363.51 as roughly one quarter (23.387%) of the way between 0 and 1366.
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