layout(location = 0) in vec3 inPosition;
layout(location = 1) in vec3 inNormal;
layout(location = 2) in vec2 inUV;
layout(location = 3) in vec3 inTangent;
layout(location = 4) in mat4 inModel;

layout(location = 0) out vec3 outFragPos;
layout(location = 1) out vec3 outNormal;
layout(location = 2) out vec2 outUV;
layout(location = 3) out mat3 TBN;

layout(std140, binding = 0) uniform UniformObjectData {
    mat4 projection, view, model;
    vec4 albedoTint;
    vec4 emission;
    float metallic, roughness;
} objectData;

out gl_PerVertex {
    vec4 gl_Position;
};

void main() {
    gl_Position = objectData.projection * objectData.view * inModel * vec4(inPosition, 1.0);
	outFragPos = vec3(inModel * vec4(inPosition, 1.0));
    outNormal = transpose(inverse(mat3(inModel))) * inNormal;
    outUV = inUV;

    vec3 Bitangent = cross(inTangent, normalize(outNormal));

    vec3 T = normalize(vec3(inModel * vec4(inTangent,   0.0)));
    vec3 B = normalize(vec3(inModel * vec4(Bitangent, 0.0)));
    vec3 N = normalize(vec3(inModel * vec4(inNormal,    0.0)));
    TBN = mat3(T, B, N);
}