前言

最近学习了一下Markdown的标记语法，把以前的一些文章用markDown 语法慢慢更新一下，也让文章更加舒服。

public static Texture2D ClipBlank(Texture2D orgin)

        {

            try

            {

                var left = 0;

                var top = 0;

                var right = orgin.width;

                var botton = orgin.height;

                // 左侧

                for (var i = 0; i < orgin.width; i++)

                {

                    var find = false;

                    for (var j = 0; j < orgin.height; j++)

                    {

                        var color = orgin.GetPixel(i, j);

                        if (Math.Abs(color.a) > 1e-6)

                        {

                            find = true;

                            break;

                        }

                    }

                    if (find)

                    {

                        left = i;

                        break;

                    }

                }

                // 右侧

                for (var i = orgin.width - 1; i >= 0; i--)

                {

                    var find = false;

                    for (var j = 0; j < orgin.height; j++)

                    {

                        var color = orgin.GetPixel(i, j);

                        if (Math.Abs(color.a) > 1e-6)

                        {

                            find = true;

                            break;

                        }

                    }

                    if (find)

                    {

                        right = i;

                        break;

                    }

                }

                // 上侧

                for (var j = 0; j < orgin.height; j++)

                {

                    var find = false;

                    for (var i = 0; i < orgin.width; i++)

                    {

                        var color = orgin.GetPixel(i, j);

                        if (Math.Abs(color.a) > 1e-6)

                        {

                            find = true;

                            break;

                        }

                    }

                    if (find)

                    {

                        top = j;

                        break;

                    }

                }

                // 下侧

                for (var j = orgin.height - 1; j >= 0; j--)

                {

                    var find = false;

                    for (var i = 0; i < orgin.width; i++)

                    {

                        var color = orgin.GetPixel(i, j);

                        if (Math.Abs(color.a) > 1e-6)

                        {

                            find = true;

                            break;

                        }

                    }

                    if (find)

                    {

                        botton = j;

                        break;

                    }

                }

                // 创建新纹理

                var width = right - left;

                var height = botton - top;

                var result = new Texture2D(width, height, TextureFormat.ARGB32, false);

                result.alphaIsTransparency = true;

                // 复制有效颜色区块

                var colors = orgin.GetPixels(left, top, width, height);

                result.SetPixels(0, 0, width, height, colors);

                result.Apply();

                return result;

            }

            catch (Exception e)

            {

                return null;

            }

        }