//創(chuàng)建背景貼圖  widthPixels = (int)(Screen.width * width);  heightPixels = (int)(Screen.height * height);  bgTexture = new Texture2D(widthPixels, heightPixels);   bgImage.texture = bgTexture;  bgImage.SetNativeSize();

int i;  int j;   if (Mathf.Abs(to.x - from.x) > Mathf.Abs(to.y - from.y))  {   // Horizontal line.   i = 0;   j = 1;  }  else  {   // Vertical line.   i = 1;   j = 0;  }   int x = (int)from[i];  int delta = (int)Mathf.Sign(to[i] - from[i]);  while (x != (int)to[i])  {   int y = (int)Mathf.Round(from[j] + (x - from[i]) * (to[j] - from[j]) / (to[i] - from[i]));    int index;   if (i == 0)    index = y * widthPixels + x;   else    index = x * widthPixels + y;    index = Mathf.Clamp(index, 0, pixelsDrawLine.Length - 1);   pixelsDrawLine[index] = color;    x += delta;  }

Array.Copy(pixelsBg, pixelsDrawLine, pixelsBg.Length);   // 基準(zhǔn)線  DrawLine(new Vector2(0f, heightPixels * 0.5f), new Vector2(widthPixels, heightPixels * 0.5f), zeroColor);   for (int i = 0; i < listPoints.Count-1; i++)  {   Vector2 from = listPoints[i];   Vector2 to = listPoints[i + 1];   DrawLine(from, to, colorLine1);  }   bgTexture.SetPixels32(pixelsDrawLine);  bgTexture.Apply();