axmol/core/renderer/shaders/position.vert

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const char* position_vert = R"(

attribute vec4 a_position;

#ifdef GL_ES
varying lowp vec4 v_position;
#else
varying vec4 v_position;
#endif

uniform mat4 u_MVPMatrix;

void main()
{
    gl_Position = u_MVPMatrix * a_position;
    v_position = a_position;
}
)";