const char* ccCameraClearVert = STRINGIFY(
                                          
uniform float depth;

attribute vec4 a_position;
attribute vec2 a_texCoord;
attribute vec3 a_color;
#ifdef GL_ES
varying mediump vec2 v_texCoord;
varying mediump vec3 v_color;
#else
varying vec2 v_texCoord;
varying vec3 v_color;
#endif
void main()
{
    gl_Position = a_position;
    gl_Position.z = depth;
    gl_Position.w = 1.0;
    v_texCoord = a_texCoord;
    v_color = a_color;
}
);