Question

opengl图形多出一个点

我用opengl画四边形，为什么会多出一个点一样，结果好像有五个点连成图形一样。画这个四边形的代码如下：
glTranslatef(0,0,-6.0f);
glBegin(GL_QUADS);
glColor3f(0.5f,0.4f,0.7f);
glVertex3f(0,1.0f,0);

glColor3f(0.7f,0.8f,0.2f);
glVertex3f(0,0,0);

glColor3f(0.6f,0.1f,0.5f);
glVertex3f(1.0f,1.0f,0);

glColor3f(0.9f,0.2f,0.4f);
glVertex3f(1.0f,0,0);
glEnd();
谢谢

Answer 1

glBegin(GL_QUADS);
glColor3f(1.0f,0,0);
glVertex3f(0,1.0f,0);

glColor3f(1.0f,0,0);
glVertex3f(0,0,0);

glColor3f(1.0f,0,0);
glVertex3f(1.0f,0,0);

glColor3f(0.9f,0.2f,0.4f);
glVertex3f(1.0f,1.0f,0);
glEnd();

四个点要按照顺序排列

Answer 2

最好把你的程序在开始部分对GL设定的那些语句贴出来，也许是设置有问题。