Re: Midi Visualizer

[Benjamin Moran]

GL_POLYGONS are only for convex shapes, I believe. That might be why there 
is the part at the bottom that's connecting together. 
Since you're just starting out, I would strongly suggest that you use 
GL_TRIANGLES.

On Monday, February 19, 2018 at 4:21:49 AM UTC+9, Eelke Johnson wrote:
>
>
> 
> Hi,
> I began to use openGL and pyglet. Now I'm trying to get a function who 
> return a sector. I want to use GL_POLYGON draw method but I've got weird 
> result... Can you help me? I use cos(pi/2) for my x coordinate and 
> sin(pi/2) for my y coordinate. I used red for the outter ring and green for 
> the inner ring. I only want to fill my array of points^^ I dont know much 
> about openGL but it's a start! I already prepared the midi interface. Im 
> only stuck with the graphic parts...
>
> here is my code
>
>
> from pyglet.gl import *
>> from math import *
>>
>> class secteur(object):
>> def __init__(self, radius, inner_radius, angle, points):
>> self.radius = radius
>> self.inner_radius = inner_radius
>> self.angle = angle
>> self.points = points
>> self.vertex = []
>> self.color = []
>> for i in range(points):
>> angle=self.angle/points*i
>> x=cos(angle)*radius
>> y=sin(angle)*radius
>> z=0
>> self.vertex.extend([x,y,z])
>> self.color.extend([255,0,0])
>> for i in range(points):
>> angle=self.angle-self.angle/points*i
>> x=cos(angle)*inner_radius
>> y=sin(angle)*inner_radius
>> z=0
>> self.vertex.extend([x,y,z])
>> self.color.extend([0,255,0])
>> self.vertices = pyglet.graphics.vertex_list(2*points,('v3f', self
>> .vertex),('c3B',self.color))
>>
>> class myWindow(pyglet.window.Window):
>> def __init__(self,*args,**kwargs):
>> super().__init__(*args,**kwargs)
>> self.set_minimum_size(300,300)
>> glClearColor(0.2,0.2,0.21,1)
>> self.secteur = secteur(0.5,0.3,pi/2,11)
>>
>>
>> def  on_draw(self):
>> self.clear()
>> self.secteur.vertices.draw(GL_POLYGON)
>>
>>
>> def on_resize(self,width,height):
>> glViewport(0,0,width,height)
>>
>>
>>
>> if __name__ == "__main__":
>> windows = myWindow(800,800,"midi_visualizer",resizable=True)
>>
>> pyglet.app.run()
>>
>>
>>
>>
>
>
>

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Re: Midi Visualizer

[Eelke Johnson]

Hi,
I began to use openGL and pyglet. Now I'm trying to get a function who 
return a sector. I want to use GL_POLYGON draw method but I've got weird 
result... Can you help me? I use cos(pi/2) for my x coordinate and 
sin(pi/2) for my y coordinate. I used red for the outter ring and green for 
the inner ring. I only want to fill my array of points^^ I dont know much 
about openGL but it's a start! I already prepared the midi interface. Im 
only stuck with the graphic parts...

here is my code


from pyglet.gl import *
> from math import *
>
> class secteur(object):
> def __init__(self, radius, inner_radius, angle, points):
> self.radius = radius
> self.inner_radius = inner_radius
> self.angle = angle
> self.points = points
> self.vertex = []
> self.color = []
> for i in range(points):
> angle=self.angle/points*i
> x=cos(angle)*radius
> y=sin(angle)*radius
> z=0
> self.vertex.extend([x,y,z])
> self.color.extend([255,0,0])
> for i in range(points):
> angle=self.angle-self.angle/points*i
> x=cos(angle)*inner_radius
> y=sin(angle)*inner_radius
> z=0
> self.vertex.extend([x,y,z])
> self.color.extend([0,255,0])
> self.vertices = pyglet.graphics.vertex_list(2*points,('v3f', self.
> vertex),('c3B',self.color))
>
> class myWindow(pyglet.window.Window):
> def __init__(self,*args,**kwargs):
> super().__init__(*args,**kwargs)
> self.set_minimum_size(300,300)
> glClearColor(0.2,0.2,0.21,1)
> self.secteur = secteur(0.5,0.3,pi/2,11)
>
>
> def  on_draw(self):
> self.clear()
> self.secteur.vertices.draw(GL_POLYGON)
>
>
> def on_resize(self,width,height):
> glViewport(0,0,width,height)
>
>
>
> if __name__ == "__main__":
> windows = myWindow(800,800,"midi_visualizer",resizable=True)
>
> pyglet.app.run()
>
>
>
>


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