precision highp float;

uniform mat4 Modelview;
uniform mat4 Projection;

layout (location = 0) in vec3 vPosition;
layout (location = 2) in vec4 vTangent;

out vec4 Tangent;

void main() {
  Tangent = vec4(Tangent.xyz = mat3(Modelview) * vTangent.xyz, vTangent.w);
  gl_Position = Projection * Modelview * vec4(vPosition, 1.0);
}