#version 330 core

layout(location = 0) in vec4 pos;
layout(location = 1) in vec3 normal;
layout(location = 3) in vec4 multitexcoord0;

out vec3 rawpos;
out vec2 texcoord;
out mat3 TBN;

uniform mat4 osg_ModelViewProjectionMatrix;
uniform mat3 osg_NormalMatrix;

void main()
{
    rawpos = pos.xyz / pos.w;
    gl_Position = osg_ModelViewProjectionMatrix * pos;
    texcoord = multitexcoord0.st;

    vec3 tangent = cross(normal, vec3(1.0, 0.0, 0.0));
    vec3 binormal = cross(normal, tangent);

    vec3 T = normalize(osg_NormalMatrix * tangent);
    vec3 B = normalize(osg_NormalMatrix * binormal);
    vec3 N = normalize(osg_NormalMatrix * normal);
    TBN = mat3(T, B, N);
}