unity GUI绘制直线条

using UnityEngine;

using System.Collections;

using System;

public class DrawLine : MonoBehaviour {

public Vector2[] m_point;//特征点位置

public Color m_lineColor;

private static Texture2D m_texure;//最终渲染得到的带有折线的纹理

public void InitCanvas(Vector2[] point, int width, int height) {

m_point = point;

m_texure = new Texture2D(width,height);

}

public IEnumerator Draw()

{

//清空纹理对象

for (int i = 0; i < 100; i++)

{

for (int j = 0; j < 100; j++)

{

m_texure.SetPixel(i, j, Color.white);

}

}

Vector2 currentPoint = m_point[0];

for (int i = 1; i < m_point.Length; i++) {

for (float j = 0; j < 1; j = j + 0.01f) {

Vector2 temp = Vector2.Lerp(m_point[i-1],m_point[i],j);

m_texure.SetPixel(Convert.ToInt32(temp.x),Convert.ToInt32(temp.y),m_lineColor);

}

currentPoint = m_point[i];

}

m_texure.Apply();

yield return m_texure;

}

void OnPostRender()

{

StartCoroutine(Draw());

}

void Start() {

InitCanvas(m_point, 100, 100);

}

void OnGUI()

{

GUI.DrawTexture(new Rect(0, 0, 100, 100), m_texure);

}

}