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I try to use the following code to draw a square-shaped pixel with opengl
glPointSize(5.0f);
glBegin(GL_POINTS);
glVertex3f(1.0f, 1.0f, 1.0f);
glEnd();
However, the final result is a circle-shaped pixel.
Please take a look the reference http://risknfun.com/compform/w1.html
See the “Problem 4. A Grid”. On the right side, the display image has square-shaped pixel.
It’s partly up to the OpenGL implementation (i.e., it can vary with your graphics driver), but with a bit of luck, you can turn this on or off with
glEnable(GL_POINT_SMOOTH);orglDisable(GL_POINT_SMOOTH);With point smoothing turned on, you’ll normally get round points, but with it turned off you’ll get square points.