Question

我为2D网格开发脚本，以及＃34;生活＆＃34;在3D环境中。网格模型是二维数组。网格应该是可修改 - 支持改变位置，比例和旋转。其中一个必需的函数是获取网格索引（array [i，j]）在鼠标上。旋转为0,0,0时脚本正常工作。移动和缩放都没有问题，但如果旋转网格，则返回错误的索引。我使用transform.InverseTransformPoint将鼠标的世界位置转换为网格上的本地坐标。

脚本的相关部分：

using UnityEngine;
using System.Collections;

public class GridManager: MonoBehaviour {

    //...   
    public float    tileSize = 0.6f;    //tile size, tile width == tile hight

    private Object[, ] grid;
    private Vector3 gridBottomLeftLocal;


    void Start() {
        //...
        //grid start position is 0, y, 0
        gridBottomLeftLocal = new Vector3 (-gridSizeX / 2, transform.position.y, -gridSizeY / 2);
    }

    void Update() {
        Vector3 mousePos;
        if (getMousePosition(out mousePos)) {
            Debug.Log ("Hit");
            Vector2 tile = getTileByWorldPos(mousePos);
            Debug.Log ("Pos: " + tile);
        }
    }

    //TODO: check for out of grid bounds
    Vector2 getTileByWorldPos (Vector3 worldPos) {
        Vector3 localPos = transform.InverseTransformPoint(worldPos);
        Vector3 offset = localPos - gridBottomLeftLocal;
        int x = (offset.x % tileSize == 0) ? (int)(offset.x / tileSize) - 1: (int)(offset.x / tileSize);
        int y = (offset.z % tileSize == 0) ? (int)(offset.z / tileSize) - 1: (int)(offset.z / tileSize);
        return new Vector2 (x, y);
    }

    private bool getMousePosition(out Vector3 mousePos) {
        Vector3 a = transform.position + Vector3.forward;
        Vector3 b = transform.position + Vector3.right;
        Vector3 c = transform.position + new Vector3 (1,0,1);
        Plane plane = new Plane (a, b, c);
        Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
        float enter;
        bool isHit = plane.Raycast (ray, out enter);
        mousePos = isHit ? ray.GetPoint (enter) : Vector3.zero;
        return isHit;
    }

}

在旋转对象

0 个答案: