# ***************************************************************************
# *   Copyright (c) 2021 Bernd Hahnebach <bernd@bimstatik.org>              *
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# *   This file is part of the FreeCAD CAx development system.              *
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# ***************************************************************************

__title__ = "FreeCAD FEM calculix constraint selfweight"
__author__ = "Bernd Hahnebach"
__url__ = "https://www.freecad.org"


def get_analysis_types():
    return ["buckling", "static", "thermomech"]


def get_constraint_title():
    return "Self weight Constraint"


def get_before_write_constraint():
    return ""


def get_after_write_constraint():
    return ""


def write_constraint(f, femobj, selwei_obj, ccxwriter):

    # floats read from ccx should use {:.13G}, see comment in writer module

    f.write("*DLOAD\n")
    f.write(
        # elset, GRAV, magnitude, direction x, dir y ,dir z
        "{},GRAV,{:.13G},{:.13G},{:.13G},{:.13G}\n"
        .format(
            ccxwriter.ccx_eall,
            ccxwriter.gravity,  # actual magnitude of gravity vector
            selwei_obj.Gravity_x,  # coordinate x of normalized gravity vector
            selwei_obj.Gravity_y,  # y
            selwei_obj.Gravity_z  # z
        )
    )
    f.write("\n")


# grav (erdbeschleunigung) is equal for all elements
# should be only one constraint
# different element sets for different density
# are written in the material element sets already