update

cg/canvas.md

@@ -56,6 +56,12 @@ CanvasRenderingContext2D.isPointInPath()
 
 [标准文档中的canvas text style](https://html.spec.whatwg.org/multipage/canvas.html#text-styles)
 
+### color-space or color-model
+
+[Canvas Drawing images standard doc](https://html.spec.whatwg.org/multipage/canvas.html#drawing-images)
+[A Standard Default Color Space for the Internet - sRGB](https://www.w3.org/Graphics/Color/sRGB.html)
+[CSS Color Module Level 3](https://www.w3.org/TR/css-color-3/#rgb-color)
+
 ## 参考
 
 - [OffscreenCanvas-离屏canvas使用说明](https://zhuanlan.zhihu.com/p/100375855)

index/books.md

@@ -10,6 +10,7 @@
     - 通过webpack对nodejs支持js的module理解更透彻，实践就是用到的
 
 - [what every programmer should know about memory](https://people.freebsd.org/~lstewart/articles/cpumemory.pdf)
+- [Effective Debugging有效调试](https://celthi.github.io/effective-debugging-zh/)
 
 ## 数学
 

index/computerScience.md

@@ -40,7 +40,7 @@
 - [bezierjs ](https://pomax.github.io/bezierjs/)
     - [github](https://github.com/Pomax/bezierjs)
 
-### 网格与CAD
+### 网格
 - [HalfEdge半边结构](../cg/tools/half-edge.md)
 - [网格划分](../cg/mesh/mesh-generation.md)
 - [曲线](../cg/tools/curve.md)
@@ -54,6 +54,10 @@
 - [How to make an infinite grid无限网格](http://asliceofrendering.com/scene%20helper/2020/01/05/InfiniteGrid/)
 - [LNLib is a C++ NURBS Algorithms Library. These algorithms are primary referenced from The NURBS Book 2nd Edition. ](https://github.com/BIMCoderLiang/LNLib)
 
+### CAD
+
+- [FreeCAD is an open-source parametric 3D modeler made primarily to design real-life objects of any size](https://github.com/FreeCAD/FreeCAD)
+
 ### api
 
 - [OpenGL](../cg/opengl.md)

web/html.md

@@ -1,7 +1,10 @@
 
 # [HTML](https://whatwg.org/)
 
-> 文档[mozilla html doc](https://developer.mozilla.org/en-US/docs/Web/HTML),[HTML5](https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/HTML5).
+>  [HTML Living Standard ](https://html.spec.whatwg.org/multipage/)
+
+[mozilla html doc文档](https://developer.mozilla.org/en-US/docs/Web/HTML)
+
 
 ## tags