【边玩边学Unity3d】实现可编辑网格(unity3drpg游戏教程)

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转载： Prefab， 以供多次实例化调用。

脚本如下：

[csharp] view plaincopyusing UnityEngine; using System.Collections; public class Vertex : MonoBehaviour { private const float size = 0.f; private Vector3[] newVertices = { new Vector3(size, -size, 0), new Vector3(size, size, 0), new Vector3(-size, size, 0), new Vector3(-size, -size, 0) }; private Vector2[] newUV = { new Vector2(0, 0), new Vector2(0, 1), new Vector2(1, 1), new Vector2(1, 0) }; private int[] newTriangles = {0, 3, 2, 0, 2, 1}; private Vector3[] newNormals = {Vector3.forward, Vector3.forward, Vector3.forward, Vector3.forward};//forward private Vector4[] newTangents = { new Vector4(-1, 0, 0, -1), new Vector4(-1, 0, 0, -1), new Vector4(-1, 0, 0, -1), new Vector4(-1, 0, 0, -1) }; // Use this for initialization void Start () { Mesh mesh = new Mesh(); GetComponent<MeshFilter>().mesh = mesh; mesh.vertices = newVertices; mesh.uv = newUV; mesh.triangles = newTriangles; mesh.normals = newNormals; mesh.tangents = newTangents; } } 然后，是Edge Prefab预设，即实现两端顶点位置改变时可以更新自身网&#;顶点位置，且在鼠标长按后实现添加顶点的边对象。该对象组件与Vertex Prefab大致相同，其脚本“Edge”中多了起始和终止顶点属性，以及计算自己网&#;顶点的CalcuVertexPosition方法。

脚本如下：

[csharp] view plaincopyusing UnityEngine; using System.Collections; public class Edge : MonoBehaviour { private GameObject startVertex; private GameObject endVertex; private Vector3[] newVertices = new Vector3[4]; private const float size = 0.f; private Vector3[] basicVertices = { new Vector3(size, 0, 0), new Vector3(size, 0, 0), new Vector3(-size, 0, 0), new Vector3(-size, 0, 0) }; private Vector2[] newUV = { new Vector2(1, 1), new Vector2(0, 1), new Vector2(0, 0), new Vector2(1, 0) }; private int[] newTriangles = {0, 3, 2, 0, 2, 1}; private Vector3[] newNormals = {Vector3.forward, Vector3.forward, Vector3.forward, Vector3.forward}; private Vector4[] newTangents = { new Vector4(-1, 0, 0, -1), new Vector4(-1, 0, 0, -1), new Vector4(-1, 0, 0, -1), new Vector4(-1, 0, 0, -1) }; public GameObject StartVertex { get {return startVertex;} set {startVertex = value;} } public GameObject EndVertex { get {return endVertex;} set {endVertex = value;} } public void CalcuVertexPosition () { if(startVertex == null || endVertex == null){ return; } Vector3 startPosition = startVertex.transform.localPosition; Vector3 endPosition = endVertex.transform.localPosition; float length = Vector3.Distance(startPosition, endPosition) - 0.f; float halfLength = length * 0.5f; Vector3 position = (endPosition &#; startPosition)*0.5f; Quaternion rotation = Quaternion.FromToRotation(Vector3.up, startPosition - endPosition ); gameObject.transform.localPosition = position; gameObject.transform.localRotation = rotation; BoxCollider collider = GetComponent<BoxCollider>(); collider.size = new Vector3(0.f, length, 0.f); newVertices[0] = halfLength*Vector3.down &#; basicVertices[0]; newVertices[1] = halfLength*Vector3.up &#; basicVertices[1]; newVertices[2] = halfLength*Vector3.up &#; basicVertices[2]; newVertices[3] = halfLength*Vector3.down &#; basicVertices[3]; ResetMesh(); } public void ResetMesh(){ Mesh mesh = new Mesh(); GetComponent<MeshFilter>().mesh = mesh; mesh.vertices = newVertices; mesh.uv = newUV; mesh.triangles = newTriangles; mesh.normals = newNormals; mesh.tangents = newTangents; } } 先到这里，下一篇完成MeshObject对象，以及MeshBuilder、MeshEditor脚本。

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