GL_POINTS In OpenGl
#include <GL/glut.h> void display(void) { glClear(GL_COLOR_BUFFER_BIT); glPointSize(3.0); glBegin(GL_POINTS); glColor3f(1.0,1.0,0.0); glVertex2f(-0.5, -0.5); glColor3f(1.0,0.0,0.0); glVertex2f(-0.5, 0.5); glColor3f(0.0,0.0,1.0); glVertex2f(0.5, 0.5); glColor3f(0.0,1.0,0.0); glVertex2f(0.5, -0.5); glEnd(); glFlush(); } void init(){} int main(int argc, char** argv) { glutCreateWindow("simple"); glutDisplayFunc(display); init(); glutMainLoop(); }