for http://stackoverflow.com/questions/42160903/reading-float-values-from-binary-file-in-after-effects-script/

reading float values from binary file (in after effects script).jsx

// for http://stackoverflow.com/questions/42160903/
var myFile = File.openDialog('select file');
myFile.open("r");
myFile.encoding = "binary";

var buffers = [];
for(var x=0; x<myFile.length; x += 4) {
    myFile.seek(x, 0);
    var buffer = "0x";
    for(var y=0; y<4; y++) {
        var hex = myFile.readch().charCodeAt(0).toString(16);
        if(hex.length === 1) {
            hex = "0" + hex;
        }
        buffer += hex;
    }
    buffers.push(parseFloat2(buffer));
    
}
alert(buffers);


function parseFloat2(str) {
    // from http://stackoverflow.com/a/14090278/6153990
    var float2 = 0, sign, order, mantiss,exp,
    int2 = 0, multi = 1;
    if (/^0x/.exec(str)) {
        int2 = parseInt(str,16);
    } else {
        for (var i = str.length -1; i >=0; i -= 1) {
            if (str.charCodeAt(i)>255) {
                console.log('Wrong string parametr'); 
                return false;
            }
            int2 += str.charCodeAt(i) * multi;
            multi *= 256;
        }
    }
    sign = (int2>>>31)?-1:1;
    exp = (int2 >>> 23 & 0xff) - 127;
    mantiss = ((int2 & 0x7fffff) + 0x800000).toString(2);
    for (i=0; i<mantiss.length; i+=1){
        float2 += parseInt(mantiss[i])? Math.pow(2,exp):0;
        exp--;
    }
    return float2*sign;
}