math3d | Legacy version : Use math3d-react repo | Frontend Framework library

I ported over the .cpp version of spinningcube found there to python for a better understanding of opengl and to create something new. While I get the same result as the compiled version from the book source code from both 6th and 7ed as the program is the same from the two editions, the program in its current state displays a green screen only. The book of OpenGl Superbible 7th ed. on page 177 shows a spinning colored cube is supposed to fly around. Any assistance would be greatly appreciated.

Update - June 24, 2019 - I have updated the code so that the cube appears, spins, and moves per the excellent code from Rabbid76. Thank You.

I need to compile qt-5.5 for building various applications. Qt provides instruction to accomplish this here , but following the steps provided, results in a make error.

Note: I attempted searching for a solution of this make warning without success, however, may be someone else experienced this problem.

System used:

• Archlinux (Linux arch-desktop 4.9.77-1-lts #1 SMP Wed Jan 17 12:59:05 CET 2018 x86_64 GNU/Linux)
• Qt 5.5.1
• OpenSSL 1.0.2g
• GCC (GCC) 7.2.1 20171224

Steps taken:

OS Installation:

• During ArchLinux installation, I installed development packages with pacstrap /mnt/point/here base base-devel, see this for more info

Post Installation:

• Downloaded Qt 5.5.1 from here
• Downloaded appropriate OpenSSL 1.0.2g (same found in Ubuntu distributions as this is my target platform) found here
• Installing this OpenSSL version will break dependencies, so I extracted it to /opt/lib/openssl/, and placed the lib, bin, share folders in the root folder mentioned above.
• extracted Qt-5.5.1
• ran OPENSSL_LIBS='-L/opt/lib/openssl/lib/ -lssl -lcrypto'; ./configure -developer-build -opensource -nomake examples -nomake tests -confirm-license -openssl-linked -prefix /opt/qt-5.5.1 (This sets the openssl library location to use for configuring. Then I link the openssl libraries and configure Qt-5.5.1 to install to /opt/qt-5.5.1)
• This results in an appropriate output of abilities which Qt will have once installed, amongst which OpenSSL is found

Finally, makeing with - make -j 8

This takes a while eventually throwing the error:

I'm using GDI+ to implement some simple graphics, I've taken the code from this example http://www.vcskicks.com/3d_gdiplus_drawing.php and can get it to do what I want, but I don't understand how it's doing the conversion from 3D data point to 2D data point:

As part of rewriting my game engine in cython, I am trying to improve the performance of my python+numpy classes for matrix and vector math as this was one of the major bottlenecks I had run into previously. This group of modules had defined classes for types such as Vector2/3/4, Matrix2/3/4, and Quaternion.

Taking a page from the glMatrix javascript library, I thought that one thing I could do this time around is switch away from a class-based system to a module with just a bunch of math functions to reduce more overhead. That way, instead of returning a new object every time I, say, added two vectors together, I would not have to construct a custom object.

To test this out, I wrote a benchmark demo for creating two Vec2 objects a and b summing them component-wise to get a Vec2 object out. The code for this is broken down into a main.py that does the timing, a vec2.pyx for the cython code, and a pyvec2.py for the python code. Here is the code for each of those components:

main.py

As part of writing a 3D game library, I am trying to implement frustum culling in order to avoid rendering objects that are outside of the camera perspective frustum. To do this, I first need to calculate a bounding sphere for each mesh and see if it collides with any of the six sides of the viewing frustum. Here is my currently (very) naive implementation of computing the bounding sphere for each model as written in model.py in my code: