GLVERTEX2F (GLFLOAT, GLFLOAT) is a function that displays two parameters in the window. If you want to display two parameters in the window, the values of the parameters range from 0.0 to 1.0.
glBegin(GL_LINES):
vertex2f *(A);
glVertex2f*(A);
glVertex2f*(B);
glVertex2f * ©;
AB and CD… There will be linear connections between, but no linear connections between BC and DE
GlBegin (GL_LINE_STRIP) :
glVertex2f * (A);
glVertex2f*(B);
glVertex2f * ©;
AB and CD… There will be linear connections between BC and DE
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