NewVShader.vertexshader

#version 330 core

layout(location = 0) in vec3 vertexPosition_modelspace;
layout(location = 1) in vec2 vertexUV;
layout(location = 2) in vec3 vertexNormal_modelspace;
layout(location = 3) in vec3 vertexTangent_modelspace;
layout(location = 4) in vec3 vertexBiTangent_modelspace;

uniform mat4 VP;
uniform mat4 M;
uniform mat4 V;
uniform vec4 LightLocation_world_space;


out vec2 UV;
out vec3 Eye_Direction;
out vec3 LightDirection_eyespace;
out vec3 Eye_Direction_tangentspace;
out vec3 LightDirection_tangentspace;
out vec3 Normal_eyespace;
out vec3 Tangent_eyespace;
out vec3 Tangent_modelspace;
//out vec3 interpolatedColor;
out vec4 world_position;

void main()
{
    Tangent_modelspace = vertexTangent_modelspace;
    //BiTangent_modelspace = normalize(vertexTangent_modelspace);
    mat4 MVP = VP*M;

    vec3 tan = normalize(vertexTangent_modelspace - vertexNormal_modelspace * dot(vertexNormal_modelspace, vertexTangent_modelspace));

    if (dot(cross(vertexNormal_modelspace, tan),vertexBiTangent_modelspace) < 0.0f){
     tan.z = tan.z * -1.0f;
    }

    vec4 v = vec4(vertexPosition_modelspace,1);
    world_position = M*v;

    vec3 vertexPosition_cameraspace = ( V * M * v).xyz;
    Eye_Direction = vec3(0,0,0) - vertexPosition_cameraspace;

    vec3 LightPosition_eyespace = ( V * LightLocation_world_space).xyz;
    LightDirection_eyespace = LightPosition_eyespace + Eye_Direction;

    Normal_eyespace = normalize(( V * M * vec4(vertexNormal_modelspace,0)).xyz);
    Tangent_eyespace =normalize(( V * M * vec4(tan,0)).xyz);
    vec3 BiTangent_eyespace =normalize(( V * M * vec4(vertexBiTangent_modelspace,0)).xyz);

    mat3 TBN = transpose(mat3(Tangent_eyespace,BiTangent_eyespace,Normal_eyespace));


    LightDirection_tangentspace = TBN * LightDirection_eyespace;
    Eye_Direction_tangentspace = TBN * Eye_Direction;





    gl_Position = MVP * v;

    UV = vertexUV;
    /*
    interpolatedColor.r = 0.8;
    interpolatedColor.g = 0.8;
    interpolatedColor.b = 0.8;*/


}