oli larkin

can anyone explain to me how I can use gl line stipple to draw a dotted line?

below is what i have so far but it gives me an error:

ob3d_draw_end popmatrix: GL Error: Invalid operation

dotted-lines-gl-line-stipple

Note that you can't give arbitrary gl calls between glbegin and 

glend. It is a very small subset of calls which are valid within 

glbegin/end, mostly restricted to vertex attributes (position, 

texture, color, normals, fog coordinate, etc). other opengl calls 

such as any glenable/disable calls must happen before the glbegin 

call. Changing this, your example seems to work as expected for me.

See the OpenGL Red Book (p.46 in my edition) for more information on 

Note that you can't give arbitrary gl calls between glbegin and  
glend. It is a very small subset of calls which are valid within  
glbegin/end, mostly restricted to vertex attributes (position,  
texture, color, normals, fog coordinate, etc). other opengl calls   
such as any glenable/disable calls must happen before the glbegin  
call. Changing this, your example seems to work as expected for me.

See the OpenGL Red Book (p.46 in my edition) for more information on  
glBegin()/glEnd() restrictions.

dotted lines - gl line stipple