如何在OpenGl中画线? [英] How to draw line in OpenGl?

问题描述

我想在opengl中画一条线.

I want to draw a line in opengl.

 glBegin(GL_LINES);
    glVertex2f(.25,0.25);
    glVertex2f(.75,.75);
glEnd();

此代码画线，但是如果我想从坐标(10,10)到坐标(20,20)画一条线，我该怎么办?

this code draw line but if i want to draw a line from coordinate(10,10) to coordinate(20,20) what will i do ?

(.25，.25)和(.75，.75)是什么意思?

what it means (.25,.25) and (.75, .75) ?

推荐答案

(.25，.25)和(.75，.75)是线的起点和终点.

(.25, .25) and (.75,.75) are line's start and end point.

要从(10,10)到(20,20)画一条线:

To draw a line from (10,10) to (20,20):

glBegin(GL_LINES);
    glVertex2f(10, 10);
    glVertex2f(20, 20);
glEnd();

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