Point to grow and shrink by using gl_PointSize

问题

I'm Trying to grow and shrink an point by using this function glPointSize()

    float i;
    for (i = 0.0; i < 400.0; i ++) {
        glPointSize(i);
    }
    while (i > 0.0) {
        glPointSize(i);
        i--;
    }

it just point, Couldn't know how to make it move?

回答1:

Implementations have a limitation on the size of points. The GL_POINT_SIZE_RANGE can be used to fetch this limit, but it will generally be rather less than 400. A larger point size will be clamped to this range.

来源：https://stackoverflow.com/questions/57936064/point-to-grow-and-shrink-by-using-gl-pointsize