ActionScript 3 从3D空间中的物体获取角度

Posted 2021-05-23

var tempMatrix:Matrix3D = Matrix3D.inverse( new Matrix3D([0,0,0]) );
			
var vectorA:Number3D 	= new Number3D( 0,0,1 );
Matrix3D.multiplyVector( *OBJECT*.getPlane().transform, vectorA );
vectorA.normalize();

var vectorB:Number3D = new Number3D( 0,0,1 );
tempMatrix = Matrix3D.clone( *CLICKED-OBJECT*.transform );
Matrix3D.multiplyVector( tempMatrix, vectorB );
vectorB.normalize();

var angle:Number = Math.acos( Number3D.dot(vectorB, vectorA) / (vectorA.modulo*vectorB.modulo) )*180/Math.PI;

trace( angle );