layout(location = 0) in vec3 inPosition;
layout(location = 1) in vec3 inNormal;
layout(location = 2) in vec2 inTexCoords;
layout(location = 3) in vec3 inTangent;
layout(location = 4) in vec4 inBoneWeights;
layout(location = 5) in ivec4 inBoneIDs;

layout(std140, binding = 0) uniform UniformSceneData {
    mat4 projection, view, model;
    vec4 cameraPosition;
} sceneData;

out VS_OUT {
    vec3 FragPos;
    vec3 Normal;
    vec2 TexCoords;
    mat3 TBN;
} vs_out;

out gl_PerVertex {
    vec4 gl_Position;
};

void main() {
    gl_Position = sceneData.projection * sceneData.view * sceneData.model * vec4(inPosition, 1.0);
	vs_out.Normal = transpose(inverse(mat3(sceneData.model))) * inNormal;
	vs_out.FragPos = vec3(sceneData.model * vec4(inPosition, 1.0));
    vs_out.TexCoords = inTexCoords;

    vec3 Bitangent = cross(inTangent, normalize(vs_out.Normal));

    vec3 T = normalize(vec3(sceneData.model * vec4(inTangent,   0.0)));
    vec3 B = normalize(vec3(sceneData.model * vec4(Bitangent, 0.0)));
    vec3 N = normalize(vec3(sceneData.model * vec4(inNormal,    0.0)));
    vs_out.TBN = mat3(T, B, N);
}