3dengine.org

3Dengine.org - 3Dengine.org

3Dengine.org is my storage area of snippets/explainations about 3D graphics. It lists useful snippets of code I've developed while learning OpenGL programming, as well as definitions of words, explanation of terms and references to sites and books where I found more info. FPS Spectator code (PyOpenGL). Example of NumPy in PyOpenGL Call. Right, Up, Back vectors From Modelview matrix. Quaternions (C and Python). Heading, Pitch And Roll Angles. Draw a grid (OpenGL). Camera position in space (OpenGL).

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3Dengine.org is my storage area of snippets/explainations about 3D graphics. It lists useful snippets of code I've developed while learning OpenGL programming, as well as definitions of words, explanation of terms and references to sites and books where I found more info. FPS Spectator code (PyOpenGL). Example of NumPy in PyOpenGL Call. Right, Up, Back vectors From Modelview matrix. Quaternions (C and Python). Heading, Pitch And Roll Angles. Draw a grid (OpenGL). Camera position in space (OpenGL).

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3Dengine.org - 3Dengine.org | 3dengine.org Reviews

https://3dengine.org

3Dengine.org is my storage area of snippets/explainations about 3D graphics. It lists useful snippets of code I've developed while learning OpenGL programming, as well as definitions of words, explanation of terms and references to sites and books where I found more info. FPS Spectator code (PyOpenGL). Example of NumPy in PyOpenGL Call. Right, Up, Back vectors From Modelview matrix. Quaternions (C and Python). Heading, Pitch And Roll Angles. Draw a grid (OpenGL). Camera position in space (OpenGL).

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3dengine.org

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Python CallList class - 3Dengine.org

http://3dengine.org/CallList_PyOpenGL_Class

Python CallList class - a wrapper class to simplify Call Lists. Call Lists are a way to draw static geometry very fast. (More than 1M points in real-time even in Python). How to use it. Cl = CallList( random lines. With whatever YOUR function does the drawing cl.draw() cl.lazy update() while True: # OpenGL infinite loop # clear screen here cl.draw(). OpenGL context, try my python spectator code. But replace box drawing code with above call list (fps.draw simple cube() to cl.draw() . First time does lazy ...

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GluProject (pyOpenGL) - 3Dengine.org

http://3dengine.org/GluProject

Get current screen coordinates for (x,y,z) point:. Print gluProject(x, y, z, glGetDoublev(GL MODELVIEW MATRIX), glGetDouble(GL PROJECTION MATRIX), glGetInteger(GL VIEWPORT).

3

Quaternions (C++ & Python) - 3Dengine.org

http://3dengine.org/Quaternions

Quaternions (C and Python). Quats are mostly used in Heading, pitch and roll angles. The order of multiplication is important! Quat Q1 = Quat(0,0,1, roll) * Quat(1,0,0, pitch) * Quat(0,1,0, heading); double matrix for openGL[16]; Q1.gl matrix(&matrix for openGL);. Now matrix for openGL. Has modelview matrix for roll, pitch, heading angles. Roll = 30 pitch = 45 heading = 30 # the order of multiplication is important.

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Draw a grid (OpenGL) - 3Dengine.org

http://3dengine.org/Draw_a_grid

Draw a grid (OpenGL). Example of drawing a 0 to 10 units grid in XZ ( terrain.

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Right, Up, Back vectors From Modelview matrix - 3Dengine.org

http://3dengine.org/Right-up-back_from_modelview

Right, Up, Back vectors From Modelview matrix. Actually contains 4 vectors:. In this text m[i]. Is i-th element of modelview matrix as returned by glGetFloat call. Ight vector is ( m[0], m[4], m[8] ). P vector is ( m[1], m[5], m[9] ). Ack vector is ( m[2], m[6], m[10] ). Is a mnemonic to easily remember order in which vectors are stored in modelview matrix. See Center of viewport. S 3D coordinates of current camera center in PyOpenGL section to find out how to decode it.

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3Dengine.org - 3Dengine.org

3Dengine.org is my storage area of snippets/explainations about 3D graphics. It lists useful snippets of code I've developed while learning OpenGL programming, as well as definitions of words, explanation of terms and references to sites and books where I found more info. FPS Spectator code (PyOpenGL). Example of NumPy in PyOpenGL Call. Right, Up, Back vectors From Modelview matrix. Quaternions (C and Python). Heading, Pitch And Roll Angles. Draw a grid (OpenGL). Camera position in space (OpenGL).

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