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lmj01 · Jan 7, 2025 · 9a7fe71 · 9a7fe71
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diff --git a/articles/notes/work.md b/articles/notes/work.md
diff --git a/cg/geometry.md b/cg/geometry.md
@@ -2,7 +2,7 @@
 
 - [Polygon Mesh Processing书籍](/cg/mesh/PolygonMeshProcessing.md)
 - [Isogeometric Anylasis](/cg/mesh/IsogeometricAnylasis.md)
-- [Cut Geometry](/cg/mesh/cut.geometry.md)
+- [surface](/cg/mesh/surface.md)
 
 
 ## Normal
@@ -40,6 +40,7 @@
 - [Shape Decomposition for Multi-channel Distance Field Bc. Viktor Chlumsky 2015-5-15](https://github.com/Chlumsky/msdfgen/files/3050967/thesis.pdf)
 - [碰撞](/cg/library/collision.md)
 
+
 ### convex hull
 凸包
 - [Qhull computes the convex hull, Delaunay triangulation, Voronoi diagram, halfspace intersection about a point, furthest-site Delaunay triangulation, and furthest-site Voronoi diagram. ](http://www.qhull.org/)

diff --git a/cg/library/collision.md b/cg/library/collision.md
@@ -1,8 +1,9 @@
 # Collision
 
+- [bvh](cg/mesh/bvh.md)
+
 - 射线碰撞检查，如果两个重叠时，可能检测失败，因为Raycaster使用射线来检测，需要起点和方向
 
-## BVH
+## JS
 
-- [A BVH implementation to speed up raycasting and enable spatial queries against three.js meshes. ](https://github.com/gkjohnson/three-mesh-bvh)
-- [A modern C++ BVH construction and traversal library ](https://github.com/madmann91/bvh)
+- Cannon.js
diff --git a/cg/mesh/bvh.md b/cg/mesh/bvh.md
@@ -1,11 +1,25 @@
 # Bounding Volume Hierarchy(BVH)
 
+- [Real-Time SAH BVH Construction for Ray Tracing Dynamic Scenes](https://www.graphicon.ru/html/2011/conference/gc2011Sopin.pdf)
+- [A modern C++ BVH construction and traversal library ](https://github.com/madmann91/bvh)
+- [Shape Decomposition for Multi-channel Distance Fields Bc. Viktor Chlumsk´y](https://github.com/Chlumsky/msdfgen/files/3050967/thesis.pdf)
 
 ## [three-mesh-bvh](https://github.com/gkjohnson/three-mesh-bvh)
 
+### Signed Distance
+three-mesh-bvh是作为一个通用的BVH，不应限制任意mesh对象，带sign的必须有是manifold流形的
+或每个edge必须有领边信息来构建solid立体。
+- [ClosestPointToPoint: Signed Distance #704 ](https://github.com/gkjohnson/three-mesh-bvh/issues/704)
+
 ### Surface Area Heuristic(SAH)
 
 表面积启发式算法, 是一种用于优化BVH构建过程的策略, 基于复杂度成本分析和概率论，旨在通过最小化遍历BVH时的预期成本来提高查询效率.
 
 SAH算法广泛应用于需要高效碰撞检测、射线相交测试等场景管理技术的领域，
 
+### 案例
+
+- [相交的Sign-distance例子](https://zalo.github.io/ThreeHydroelasticContacts/)
+    - [ ClosestPointToPoint: Signed Distance #704 ](https://github.com/gkjohnson/three-mesh-bvh/issues/704)
+
+- [Spherical winding number shadertoy.com](https://www.shadertoy.com/view/4cKyDt)
diff --git a/cg/mesh/cut.geometry.md b/cg/mesh/cut.geometry.md
diff --git a/cg/mesh/surface.md b/cg/mesh/surface.md
@@ -1,9 +1,26 @@
 # Surface
 
+## Generalized Winding Numbers
+
 ## 拉普拉斯变形算法
 
 
 - [Laplacian Surface Editing](https://people.eecs.berkeley.edu/~jrs/meshpapers/SCOLARS.pdf)
 - [github](https://github.com/mikolalysenko/laplacian-deformation)
 
-- [Differential Coordinates for Interactive Mesh Editing](https://www.cs.jhu.edu/~misha/Fall07/Papers/Lipman04.pdf)
+- [Differential Coordinates for Interactive Mesh Editing](https://www.cs.jhu.edu/~misha/Fall07/Papers/Lipman04.pdf)
+
+## IK 
+
+- [Inverse Kinematics with Quaternion Joint Limits](http://number-none.com/product/IK%20with%20Quaternion%20Joint%20Limits/)
+
+## Cut Geometry
+
+- [Design of cut unit geometry in hierarchical kirigami-based auxetic metamaterials for high stretchability and compressibility](https://www.sciencedirect.com/science/article/pii/S235243161630058X)
+
+## Triangulation by Ear Clipping
+
+- [Triangulation by Ear Clipping](https://www.geometrictools.com/Documentation/TriangulationByEarClipping.pdf)
+- [FIST: Fast Industrial-Strength Triangulation of Polygons](http://www.cosy.sbg.ac.at/~held/projects/triang/triang.html)
+- [Earcut](https://github.com/mapbox/earcut)
+