高端的扬中网站建设,新乡网站seo,确认已有81人感染,长沙logo设计公司哪家好些在做这个之前其实是想研究一下在Unity中交互雪的实现#xff0c;交互雪顾名思义就是可以进行交互的雪#xff0c;玩家角色从雪上走过时雪被踩凹陷的效果#xff1b;交互雪的一种实现方案就是将地面看做一个画板#xff0c;将玩家角色的躯体看做笔刷#xff0c;将角色经过的… 在做这个之前其实是想研究一下在Unity中交互雪的实现交互雪顾名思义就是可以进行交互的雪玩家角色从雪上走过时雪被踩凹陷的效果交互雪的一种实现方案就是将地面看做一个画板将玩家角色的躯体看做笔刷将角色经过的路径绘制为一张图片并作为地面雪的高度图传给shader去进行处理在实现这个之前对如何实现轨迹的绘制比较感兴趣故而想先以绘画板为切入点研究研究。
不过既然研究了就做一个尽量完整的方案我想要实现的绘画板应包含如下基本功能
1.笔刷大小调节2.线条颜色调节3.可以自定义笔刷形状4.可自定义线条纹理5.绘制的图片可存储至本地6.带橡皮擦功能7.可一键清空画板8.带撤销和重做功能
说干就干先介绍一下开发环境
Unity2022.3.30f1 Rider
用什么版本和IDE无所谓啦哈哈就是玩
需要具备一定的unity基础有一些基本操作就不一一截图了和shaderlab基础不需要太深感兴趣的话可以跟着我一起来做。
技术路线选择
其实要实现绘画的功能有很多种实现方式例如可以使用Texture2D.SetPixel, Texture2D.SetPixels也可以使用Unity提供的图形接口Graphics.DrawTexture从执行效率上来讲Graphics.DrawTexture的效率更高一些Texture2D的相关接口通过遍历像素来实现效率低一些且不方便实现我们想要的可自定义线条纹理和笔刷形状的功能因此本文采用Graphics.DrawTexture来实现
源代码 /// summary
/// paraDraw a texture in screen coordinates./para
/// /summary
/// param namescreenRectRectangle on the screen to use for the texture. In pixel coordinates with (0,0) in the upper-left corner./param
/// param nametextureTexture to draw./param
/// param namesourceRectRegion of the texture to use. In normalized coordinates with (0,0) in the bottom-left corner./param
/// param nameleftBorderNumber of pixels from the left that are not affected by scale./param
/// param namerightBorderNumber of pixels from the right that are not affected by scale./param
/// param nametopBorderNumber of pixels from the top that are not affected by scale./param
/// param namebottomBorderNumber of pixels from the bottom that are not affected by scale./param
/// param namecolorColor that modulates the output. The neutral value is (0.5, 0.5, 0.5, 0.5). Set as vertex color for the shader./param
/// param namematCustom Material that can be used to draw the texture. If null is passed, a default material with the Internal-GUITexture.shader is used./param
/// param namepassIf -1 (default), draws all passes in the material. Otherwise, draws given pass only./param
[ExcludeFromDocs]
public static void DrawTexture(Rect screenRect, Texture texture, Material mat)
{Graphics.DrawTexture(screenRect, texture, mat, -1);
}
[ExcludeFromDocs]
public static void DrawTexture(Rect screenRect, Texture texture)
{Graphics.DrawTexture(screenRect, texture, (Material) null, -1);
} 在下面的文章中我们会详细介绍该接口的用法。
