layout(location=1) in vec4 color;
layout(location=2) in vec3 normal;
layout(location=3) in vec3 tangent;
+layout(location=4) in vec4 group;
+layout(location=5) in vec4 weight;
layout(location=6) in vec4 texcoord;
layout(location=7) in vec4 texcoord1;
layout(location=8) in vec4 texcoord2;