#ifdef GL_ES
// Set default precision to medium
precision mediump int;
precision mediump float;
#endif
uniform mat4 mvp_matrix;
attribute vec4 a_position;
attribute vec2 a_texcoord;
varying vec2 v_texcoord;
void main()
{
// Calculate vertex position in screen space
gl_Position = mvp_matrix * a_position;
// Pass texture coordinate to fragment shader
// Value will be automatically interpolated to fragments inside polygon faces
v_texcoord = a_texcoord;
}
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