How does gluPerspective in OpenGL form a coordinate system?

Question

C++ / C#

Good afternoon! Explain to a beginner in OpenGL the following, if I set for example glOrtho(-100,100,-100,100,-100,100) then the coordinate system is from -100 to 100 in all axes. But I can't figure out how the coordinate system is obtained with gluPerspective? For example gluPerspective(60.0f, (GLfloat)(800/600), 1.0, 400.0), am I correct in x and y from -133 to 133, and in z from -200 to 200?

Answer 1

gluPerspective(60.0f, (GLfloat)(800/600), 1.0, 400.0

Everything inside the truncated pyramid from 1 to 400 in the direction of the camera will be included in the frame (if we take world coordinates, and there are both model and view matrix)