如何在y或x轴在opengl中绘制圆柱 [英] How to draw cylinder in y or x axis in opengl

问题描述

我只想在opengl中绘制圆柱。我发现很多样品，但所有的人都在z轴绘制圆柱。我想要他们在x或y轴。我怎么能这样做。下面的代码是在z方向绘制圆柱体的代码，我不想要它。

I just want to draw a cylinder in opengl. I found lots of samples but all of them draws cylinders in z axis. I want them be in x or y axis. How can i do this. The code below is the code draw the cylinder in z direction and i dont want it

  GLUquadricObj *quadratic;
  quadratic = gluNewQuadric();
  gluCylinder(quadratic,0.1f,0.1f,3.0f,32,32);

推荐答案

您可以使用 glRotate

You can use glRotate(angle, x, y, z) to rotate your coordinate system:

GLUquadricObj *quadratic;
quadratic = gluNewQuadric();
glRotatef(90.0f, 0.0f, 1.0f, 0.0f);
gluCylinder(quadratic,0.1f,0.1f,3.0f,32,32);

http://www.opengl.org/sdk/docs/man/xhtml/glRotate.xml

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