学步园

1、Mesh.Triangles 三角形

        网格中，一个包含所有三角形的数组。

顶点可以通过简单的索引同一顶点来共享。如果网格包含多个子网格（材质），三角形列表将包含所有子网格的所有三角形。当你赋值三角形数组，subMeshCount设置为1。如果你想要有多个子网格，使用subMeshCount and SetTriangles。

         建议先赋值顶点数组之后再赋值三角形数组，为了避免越界的错误。

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	void Start() {
		gameObject.AddComponent("MeshFilter");
		gameObject.AddComponent("MeshRenderer");
		Mesh mesh = GetComponent<MeshFilter>().mesh;
		mesh.Clear();
		mesh.vertices = new Vector3[] {new Vector3(0, 0, 0), new Vector3(0, 1, 0), new Vector3(1, 1, 0)};
		mesh.uv = new Vector2[] {new Vector2(0, 0), new Vector2(0, 1), new Vector2(1, 1)};
		mesh.triangles = new int[] {0, 1, 2};
	}
}

colors[i] = Color.Lerp(Color.red, Color.green, vertices[i].y);

2、Mesh。boneWeight 权重

每个顶点的骨骼权重。

每一个顶点都可以最多收到4个不同骨骼的影响。所有这4个骨骼的权值应该的和为1.

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	void Start() {
		gameObject.AddComponent<Animation>();
		gameObject.AddComponent<SkinnedMeshRenderer>();
		SkinnedMeshRenderer renderer = GetComponent<SkinnedMeshRenderer>();
		Mesh mesh = new Mesh();
		mesh.vertices = new Vector3[] {new Vector3(-1, 0, 0), new Vector3(1, 0, 0), new Vector3(-1, 5, 0), new Vector3(1, 5, 0)};
		mesh.uv = new Vector2[] {new Vector2(0, 0), new Vector2(1, 0), new Vector2(0, 1), new Vector2(1, 1)};
		mesh.triangles = new int[] {0, 1, 2, 1, 3, 2};
		mesh.RecalculateNormals();
		renderer.material = new Material(Shader.Find(" Diffuse"));
		BoneWeight[] weights = new BoneWeight[4];
		weights[0].boneIndex0 = 0;
		weights[0].weight0 = 1;
		weights[1].boneIndex0 = 0;
		weights[1].weight0 = 1;
		weights[2].boneIndex0 = 1;
		weights[2].weight0 = 1;
		weights[3].boneIndex0 = 1;
		weights[3].weight0 = 1;
		mesh.boneWeights = weights;
		Transform[] bones = new Transform[2];
		Matrix4x4[] bindPoses = new Matrix4x4[2];
		bones[0] = new GameObject("Lower").transform;
		bones[0].parent = transform;
		bones[0].localRotation = Quaternion.identity;
		bones[0].localPosition = Vector3.zero;
		bindPoses[0] = bones[0].worldToLocalMatrix * transform.localToWorldMatrix;
		bones[1] = new GameObject("Upper").transform;
		bones[1].parent = transform;
		bones[1].localRotation = Quaternion.identity;
		bones[1].localPosition = new Vector3(0, 5, 0);
		bindPoses[1] = bones[1].worldToLocalMatrix * transform.localToWorldMatrix;
		mesh.bindposes = bindPoses;
		renderer.bones = bones;
		renderer.sharedMesh = mesh;
		AnimationCurve curve = new AnimationCurve();
		curve.keys = new Keyframe[] {new Keyframe(0, 0, 0, 0), new Keyframe(1, 3, 0, 0), new Keyframe(2, 0.0F, 0, 0)};
		AnimationClip clip = new AnimationClip();
		clip.SetCurve("Lower", typeof(Transform), "m_LocalPosition.z", curve);
		animation.AddClip(clip, "test");
		animation.Play("test");
	}
}

3、

Mesh.Optimize 网格优化

public class example : MonoBehaviour {
	void Start() {
		Mesh mesh = GetComponent<MeshFilter>().mesh;
		mesh.Optimize();
	}
}