How to change line thickness for OpenGL shapes?

Using OpenGL and C++, I can draw a shape but I want to make the l开发者_JAVA技巧ine of the shape thicker. How to do this?

Have a look at glLineWidth(..)

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

glLineWidth(n);

where n is the width of the line in pixels.

glLineWidth(n);

is the function but sometimes it will have no effect because of the hardware acceleration. Use software rendering first.