kivy with simple glsl shows error

[Degenerate Tech]

i have written simple kivy app with glsl but shows error

[Degenerate Tech]

INFO   ] [Shader      ] Read <basic.glsl>
[ERROR  ] [Shader      ] <vertex> failed to compile (gl:0)
[INFO   ] [Shader      ] vertex shader: <b'0(19) : error C1038: declaration of "frag_color" conflicts with pre
vious declaration at 0(6)\n0(20) : error C1038: declaration of "tex_coord0" conflicts with previous declaratio
n at 0(7)\n0(21) : error C1038: declaration of "vPosition" conflicts with previous declaration at 0(10)\n0(22)
: error C1038: declaration of "vTexCoords0" conflicts with previous declaration at 0(11)\n0(23) : error C1038
: declaration of "modelview_mat" conflicts with previous declaration at 0(14)\n0(24) : error C1038: declaratio
n of "projection_mat" conflicts with previous declaration at 0(15)\n0(25) : error C1038: declaration of "color
" conflicts with previous declaration at 0(16)\n0(26) : error C1038: declaration of "opacity" conflicts with p
revious declaration at 0(17)'>
[ERROR  ] [Shader      ] <fragment> failed to compile (gl:0)
[INFO   ] [Shader      ] fragment shader: <b'0(14) : error C1038: declaration of "frag_color" conflicts with p
revious declaration at 0(6)\n0(15) : error C1038: declaration of "tex_coord0" conflicts with previous declarat
ion at 0(7)\n0(16) : error C1038: declaration of "texture0" conflicts with previous declaration at 0(10)'>
[INFO   ] [Base        ] Start application main loop

[Elliot Garbus]

I don’t know glsl, but there are a number of examples in the kivy examples directory.

In the kivy-examples/demo directory is an interactive shader editor.

In the kivy-examples/shader directory are a few examples.

 

I would think those would be helpful.

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