glut

I want to draw many spheres (~100k) using OpenGL. So far, I'm doing something like for (int i=0; i<pnum; i++){ glPushMatrix(); glTranslatef(bpos[i].x, bpos[i].y, bpos[i].z); glCallList(DListSPHERE); glPopMatrix(); } Before using proper spheres, I used GL_POINTS . That allowed me to call glDrawArrays with an array containing all points which was very efficient. Is there a better way than the above code to draw many, identical objects? Gregory Pakosz Have a look at this page on instancing : it contains many references: Some test made that shows when to use instancing and when not: http://www

I'm designing a simple GUI framework from scratch as a project, using OpenGL and nothing else external and need some advice on how I might implement user interaction. Basically, I've a base class GUIItem from which all elements inherit. This gives each item some basic variables such as position, a vector to contain child elements as well as some basic functions for mouse movement and clicking. All elements are setup as above, with their relevant member variables. What I'm struggling with is how to implement user interaction properly. In my window manager I would create a new instance of an

Calling on experts, gurus, and anybody to help read and parse a file in python. On page 751 of 6th ed. or page 800 of 7th ed. of Superbible OpenGL there is Appendix B. The SBM File Format that seems to explain well the format to some extent. I have tried to implement in python a reader of this file format. OK, progress has been made. I have merged Rabbid76 amazing code to the source provided. Though I am attempting to make additional headway. Update Jun 23, 2019 - major progress, fixed the error about glVertexAttribPointer(i, ... error. Same day, fixed the Python cannot find the variable first

I need a glut window in python. I have the following exception using Python 3.5 and PyOpenGL.GLUT Traceback (most recent call last): File "D:\...\Test.py", line 47, in <module> if __name__ == '__main__': main() File "D:\...\Test.py", line 9, in main glutInit(sys.argv) File "C:\...\OpenGL\GLUT\special.py", line 333, in glutInit _base_glutInit( ctypes.byref(count), holder ) File "C:\...\OpenGL\platform\baseplatform.py", line 407, in __call__ self.__name__, self.__name__, OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit, check for bool(glutInit) before calling

I know this thing works: void myDisplay() { ... } int main() { ... glutDisplayFunc(myDisplay) ... } so I tried to include myDisplay() function to a class that I made. Because I want to overload it in the future with a different class. However, the compiler complains that argument of type 'void (ClassBlah::)()' does not match 'void(*)()' . Here is the what I try to make: class ClassBlah { .... void myDisplay() .... } ...... int main() { ... ClassBlah blah glutDisplayFunc(blah.myDisplay) ... } Does anybody knows how to fix this problem? Many thanks. Firstly, there is an implicit "this" pointer

As I had many problems setting Visual Studio 2008 for using OpenGL I will ask this question that can be useful to some people: Which are the steps to follow in order to use OpenGL with C++ in Visual Studio 2008? Jav_Rock First of all you need to have a video card and check that it works with OpenGL and the drivers are updated. I used the test in this link to check it. It is also important to check that Visual Studio 2008 is correctly installed and that the following path is created in your computer: C:\Program Files\Microsoft SDKs\Windows\v6.0A Now we can follow the installation steps: 1.-