OpenGL簡單畫線程序

#include <GL/glut.h> void display(){   glClearColor (0.0, 0.0, 0.0, 0.0);   glClear (GL_COLOR_BUFFER_BIT);   glLineWidth(2);//設置線段寬度 glBegin(GL_LINES);   glColor3f(1.0,0.0,0.0);   glVertex2f(0.8,1); /

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