我正在Unity写一个Cardboard游戏,我想检查我的相机是否面对精灵。我写了以下代码:
private void GetSphericalCoordinates(Vector3 vector, out float tetta, out float fi)
{
float r = Mathf.Sqrt(vector.x * vector.x + vector.y * vector.y + vector.z * vector.z);
tetta = Mathf.Acos(vector.z / r);
fi = Mathf.Atan2(vector.y, vector.x);
}
public bool IsLookingAtMe(Vector3 point, Quaternion angle)
{
Vector3 topLeftPoint = new Vector3(transform.position.x - transform.localScale.x / 2, transform.position.y - transform.localScale.y / 2);
Vector3 topRightPoint = new Vector3(transform.position.x + transform.localScale.x / 2, transform.position.y - transform.localScale.y / 2);
Vector3 bottomLeftPoint = new Vector3(transform.position.x - transform.localScale.x / 2, transform.position.y + transform.localScale.y / 2);
Vector3 bottomRightPoint = new Vector3(transform.position.x + transform.localScale.x / 2, transform.position.y + transform.localScale.y / 2);
float topLeftTetta, topRightTetta, bottomLeftTetta, bottomRightTetta, lookTetta;
float topLeftFi, topRightFi, bottomLeftFi, bottomRightFi, lookFi;
GetSphericalCoordinates(topLeftPoint - point, out topLeftTetta, out topLeftFi);
GetSphericalCoordinates(topRightPoint - point, out topRightTetta, out topRightFi);
GetSphericalCoordinates(bottomLeftPoint - point, out bottomLeftTetta, out bottomLeftFi);
GetSphericalCoordinates(bottomRightPoint - point, out bottomRightTetta, out bottomRightFi);
lookTetta = angle.eulerAngles.x * Mathf.Deg2Rad;
lookFi = angle.eulerAngles.y * Mathf.Deg2Rad;
if (lookTetta >= topLeftTetta && lookTetta <= bottomRightTetta)
return true;
return false;
}
在我的代码中,我找到了我的精灵的4个角度,这是一个正方形,所以我有5个点构成金字塔。现在我需要检查我的相机是否在我的金字塔内。
问题是,我的lookTetta和lookFi永远不会进入我的金字塔。我只是检查了Tetta。
请帮帮我。
答案 0 :(得分:1)
使用WorldToViewportPoint
它应该是一个单一的声明。无需手动处理查看锥体。
将精灵世界位置投影到视口位置,然后查找它是否在边界内(忽略z)。
public bool IsMainCameraLookingAtMe()
{
Bounds viewportBounds = new Bounds.SetMinMax(Vector2.zero, Vector2.one);
return viewportBounds.Contains((Vector2)Camera.main.WorldToViewportPoint(transform.position));
}
可以单独检查每个精灵角以满足您的需求。
答案 1 :(得分:0)
我使用下面的代码使用IntersectRay
:
public bool IsLookingAtMe(Vector3 origin, Vector3 direction)
{
Bounds bounds = GetComponent<Renderer>().bounds;
Ray ray = new Ray(origin, direction);
return bounds.IntersectRay(ray);
}