ofxDelaunay solid colour triangles

beginners
#1

Hi there!

I’m using ofxDelaunay for a project and i’ve ran into an issue trying to draw the triangles with a solid colour. Currently, the triangles are drawn with a gradient fill as seen below:

Screenshot 2015-11-12 17.53.25.png1408×779 549 KB

I’ve read that it may be down to sharing vertices - Did anybody have any ideas on how to solve this? Some small code examples would help massively!

Thank you ever so much!

James.

#2

Hi James!

If you are still using the Fixed function renderer (not GL Programmable Renderer) you can simply set glShadeModel(GL_FLAT) before drawing.

https://www.opengl.org/discussion_boards/showthread.php/169700-GL_FLAT-GL_SMOOTH-switching-front-and-back-issue

If you are using programmable renderer, you’ll need to write a simple shader that passes the vertex colors along with flat interpolation qualifiers

http://www.geeks3d.com/20130514/opengl-interpolation-qualifiers-glsl-tutorial/

Hope this helps!

1 Like
#3

Thank you so much, this has solved it straight away!

James.

#4

I am curious how you define the points and colors for the points to triangulate.

Thanks.

–8