python - Drawing in OpenGL is always white -


i'm trying draw simple triangles in opengl. problem triangle white, wheras put color glcolor3f function:

def ondraw(self):      glclear(gl_color_buffer_bit | gl_depth_buffer_bit)     glclearcolor(.1, 0.1, 0.1, 1.0)      glbegin (gl_triangles)     glcolor3f (1.0, 0.0, 0.0)     glvertex2f (0.25, 0.25)     glcolor3f (0.0, 1.0, 0.0)     glvertex2f (0.12, 0.25)     glcolor3f (0.0, 0.0, 1.0)     glvertex2f (0.25, 0.4)     glend()

and here initialization:

def initgl(self):     # set viewing projection     glmatrixmode(gl_projection)     glfrustum(-0.5, 0.5, -0.5, 0.5, 1.0, 3.0)      # position viewer     glmatrixmode(gl_modelview)     gltranslatef(0.0, 0.0, -2.0)      glenable(gl_depth_test)     glenable(gl_lighting)     glenable(gl_light0)

any idea?

with lighting enabled vertex colors no longer considered calculations. instead have set material properties. vertex colors quite convenient there's method use vertex colors set material properties.

glenable(gl_color_material); glcolormaterial(gl_front_and_back, gl_ambient_and_diffuse);

however note lighting work must provide vertex normals otherwise things strange. might best disable lighting time being.

on different note: please stop using old , dusted immediate mode, fixed function pipeline opengl. instead learn modern opengl. recommend http://arcsynthesis.org/gltut start.


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