joint.all.js
function(p) {
            p = point(p);
            // Invert the y-axis.
	    var y = -(p.y - this.y);
	    var x = p.x - this.x;
            // Makes sure that the comparison with zero takes rounding errors into account.
            var PRECISION = 10;
            // Note that `atan2` is not defined for `x`, `y` both equal zero.
	    var rad = (y.toFixed(PRECISION) == 0 && x.toFixed(PRECISION) == 0) ? 0 : atan2(y, x); 

            // Correction for III. and IV. quadrant.
	    if (rad < 0) { 
	        rad = 2*PI + rad;
	    }
	    return 180*rad / PI;
        }
function(p) {
            p = point(p);
            // Invert the y-axis.
	    var y = -(p.y - this.y);
	    var x = p.x - this.x;
            // Makes sure that the comparison with zero takes rounding errors into account.
            var PRECISION = 10;
            // Note that `atan2` is not defined for `x`, `y` both equal zero.
	    var rad = (y.toFixed(PRECISION) == 0 && x.toFixed(PRECISION) == 0) ? 0 : atan2(y, x); 

            // Correction for III. and IV. quadrant.
	    if (rad < 0) { 
	        rad = 2*PI + rad;
	    }
	    return 180*rad / PI;
        }
function ( p ) { p = point ( p ) ; // Invert the y-axis. var y = - ( p . y - this . y ) ; var x = p . x - this . x ; // Makes sure that the comparison with zero takes rounding errors into account. var PRECISION = 10 ; // Note that `atan2` is not defined for `x`, `y` both equal zero. var rad = ( y . toFixed ( PRECISION ) == 0 && x . toFixed ( PRECISION ) == 0 ) ? 0 : atan2 ( y , x ) ; // Correction for III. and IV. quadrant. if ( rad < 0 ) { rad = 2 * PI + rad ; } return 180 * rad / PI ; }
Compute the angle between me and `p` and the x axis. (cartesian-to-polar coordinates conversion) Return theta angle in degrees.
Compute the angle between me and p and the x axis . ( cartesian - to - polar coordinates conversion ) Return theta angle in degrees .