将虚拟按钮映射到屏幕上

由于项目需求，自己做了一个小demo，把识别图上的虚拟按钮映射到屏幕上。按钮的位置和虚拟按钮保持一致，大小根据相机距离进行调节。

void GetVertex(Transform[] Vbtns,Button[] Ubtns) {        for (int i = 0; i < Vbtns.Length; i++) {            Vector3[] vertexs = new Vector3[4];             RectTransform UIBtnRect = Ubtns[i].GetComponent<RectTransform>();

            //根据虚拟按钮的缩放信息，求出宽高
 float vbLength = Vbtns[i].localScale.x; float vbWidth = Vbtns[i].localScale.z;
    //根据宽高和位置信息求出四个顶点的坐标            vertexs[0] = new Vector3(Vbtns[i].position.x - (vbLength / 2), Vbtns[i].position.y, Vbtns[i].position.z + (vbWidth / 2));            vertexs[1] = new Vector3(Vbtns[i].position.x - (vbLength / 2), Vbtns[i].position.y, Vbtns[i].position.z - (vbWidth / 2));            vertexs[2] = new Vector3(Vbtns[i].position.x + (vbLength / 2), Vbtns[i].position.y, Vbtns[i].position.z - (vbWidth / 2));            vertexs[3] = new Vector3(Vbtns[i].position.x + (vbLength / 2), Vbtns[i].position.y, Vbtns[i].position.z + (vbWidth / 2));
    //转化为屏幕坐标以后，求出屏幕UI的宽和高 ，加上位置信息来确定            float UIleghth = arCamera.WorldToScreenPoint(vertexs[0]).x - arCamera.WorldToScreenPoint(vertexs[3]).x;            float UIwidth = arCamera.WorldToScreenPoint(vertexs[0]).y - arCamera.WorldToScreenPoint(vertexs[1]).y;            UIBtnRect.position = arCamera.WorldToScreenPoint(Vbtns[i].position);            UIBtnRect.rotation = Quaternion.Euler(new Vector3(Vbtns[i].eulerAngles.x, -Vbtns[i].eulerAngles.z, -Vbtns[i].eulerAngles.y));            UIBtnRect.sizeDelta = new Vector2(Mathf.Abs(UIleghth), Mathf.Abs(UIwidth));        }    }