Calculating Triangle Normals

Posted on 23 Jul 2022 - 13:10
Unity’s Mesh class nicely exposes the mesh’s topology and allows us to manipulate it with ease. The access to vertex positions, triangles and normals is immediate thanks to the availability of properties like Mesh.vertices, Mesh.triangles and Mesh.normals. Nonetheless, all developers who do any wizardry on meshes unavoidably come across a blind spot: triangle normals. Many think that Mesh.normals will give enough intormation to know what way the triangle is facing but they soon discover that the vectors that come with Mesh.

Compute width and height from diagonal and aspect ratio

Posted on 8 Nov 2021 - 11:42
Problem When the information about a screen, a window or a generic rectangle is limited to its diagonal and an the aspect ratio (the width divided by the height) and we need to know width and height, we have a little problem. It must be easy right? Well.. not as obvious as most people expect (how many of your friends know the right answer?) but still the solution isn’t difficult and it’s a nice example of use of some known quadratic formulas.