Animate.fs

#version 330 core

uniform sampler2D   texture;

uniform vec2        tc_offset;
uniform vec2        tc_start;

smooth  in  vec2 fs_texc;
smooth  in  vec4 fs_color;
        out vec4 out_color;

void main()
{
    out_color = texture2D(texture, tc_start + (fs_texc * tc_offset)) * fs_color;
}