I am using something similar to that answer linked by @RetoKoradi comment but I got double layered transparent models with textures (glass with both inner and outer surface) with fully solid machinery and stuff around. For such scenes I am using also multi pass approach and the Z-sorting is done by sequence of setting front … Read more
NO! Never do this! When declaring UBOs/SSBOs, pretend that all 3-element vector types don’t exist. This includes column-major matrices with 3 rows or row-major matrices with 3 columns. Pretend that the only types are scalars, 2, and 4 element vectors (and matrices). You will save yourself a very great deal of grief if you do … Read more
I manage to convert back-raytracing to iterative process suitable for GLSL with the method suggested in my comment. It is far from optimized and I do not have all the physical stuff implemented (no Snell’s law etc …) yet but as a proof of concept it works already. I do all the stuff in fragment … Read more
In the most general sense, no. OpenGL and Direct3D only allow one index per vertex; the index fetches from each stream of vertex data. Therefore, every unique combination of components must have its own separate index. So if you have a cube, where each face has its own normal, you will need to replicate the … Read more
normal/bump maps Provide fine details without increasing complexity of geometry that means more details at very low performance cost. Normal/bump maps are optional of coarse. normal shading (fragment shader) Normal is vector perpendicular to fragment/face/primitive there are 2 use for it: dull surface illumination lets have: color – per fragment/face/primitive color (modulated with texture) normal … Read more
So the question really is Understanding 4×4 homogenous transform matrices well without the math behind the only thing that left is geometric representation/meaning which is far better for human abstraction/understanding. So what the 4×4 matrix is? It is representation of some Cartesian coordinate system and it is composed of: 3 basis vectors (one for each … Read more
OpenGL is a graphics system. It doesn’t handle “data services”, “socket services”, “http services”, or anything of the kind. It just draws stuff. Where you get the stuff for it to draw is entirely up to you.