Unity3d：将一个游戏对象向另一个游戏对象的前向矢量旋转

Question

        BackCube.position = cameraEye.position - cameraEye.forward * 2;

        float back = cameraEye.position.z - 2f;
        BackCube.position = new Vector3(BackCube.position.x, BackCube.position.y, back);

        var lookPosBack = cameraEye.position - BackCube.position;
        lookPosBack.y = 0;
        var rotationBack = Quaternion.LookRotation(lookPosBack);
        BackCube.rotation = Quaternion.Slerp(BackCube.rotation, rotationBack, 1);

So, I want the my BackCube to rotate towards the forward vector of cameraEye . The code above looks at the cameraEye , but not towards the forward vector of cameraEye . I want the forward vectors of both pointing at each other being 2 units apart from each other. I have control only over the BackCube

Answer 1

This worked!

Vector3 direction = Vector3.ProjectOnPlane(cameraEye.forward, Vector3.up);


BackCube.transform.position = cameraEye.position - direction.normalized * 2;


var lookPosBack = cameraEye.position - BackCube.position;
lookPosBack.y = 0;
var rotationBack = Quaternion.LookRotation(lookPosBack);
BackCube.rotation = Quaternion.Slerp(BackCube.rotation, rotationBack, 1);