angles.h

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/*
 Copyright (C) 2001-2006, William Joseph.
 All Rights Reserved.

 This file is part of GtkRadiant.

 GtkRadiant is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 GtkRadiant is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with GtkRadiant; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined(INCLUDED_ANGLES_H)
#define INCLUDED_ANGLES_H

#include "ientity.h"

#include "math/quaternion.h"
#include "generic/callback.h"
#include "stringio.h"

#include "angle.h"

const Vector3 ANGLESKEY_IDENTITY = Vector3(0, 0, 0);

inline void default_angles (Vector3& angles)
{
    angles = ANGLESKEY_IDENTITY;
}
inline void normalise_angles (Vector3& angles)
{
    angles[0] = static_cast<float> (float_mod(angles[0], 360));
    angles[1] = static_cast<float> (float_mod(angles[1], 360));
    angles[2] = static_cast<float> (float_mod(angles[2], 360));
}
inline void read_angle (Vector3& angles, const char* value)
{
    if (!string_parse_float(value, angles[2])) {
        default_angles(angles);
    } else {
        angles[0] = 0;
        angles[1] = 0;
        normalise_angles(angles);
    }
}
inline void read_angles (Vector3& angles, const char* value)
{
    if (!string_parse_vector3(value, angles)) {
        default_angles(angles);
    } else {
        angles = Vector3(angles[2], angles[0], angles[1]);
        normalise_angles(angles);
    }
}
inline void write_angles (const Vector3& angles, Entity* entity)
{
    if (angles[0] == 0 && angles[1] == 0 && angles[2] == 0) {
        entity->setKeyValue("angle", "");
        entity->setKeyValue("angles", "");
    } else {
        char value[64];
        bool invertangle1 = false;
        if (angles[1] == -0)
            invertangle1 = true;
        sprintf(value, "%g %g %g", invertangle1 ? -angles[1] : angles[1], angles[2], angles[0]);
        entity->setKeyValue("angle", "");
        entity->setKeyValue("angles", value);
    }
}

inline Vector3 angles_rotated (const Vector3& angles, const Quaternion& rotation)
{
    return matrix4_get_rotation_euler_xyz_degrees(matrix4_multiplied_by_matrix4(matrix4_rotation_for_euler_xyz_degrees(
            angles), matrix4_rotation_for_quaternion_quantised(rotation)));
}

class AnglesKey
{
        Callback m_anglesChanged;
    public:
        Vector3 m_angles;

        AnglesKey (const Callback& anglesChanged) :
            m_anglesChanged(anglesChanged), m_angles(ANGLESKEY_IDENTITY)
        {
        }

        void angleChanged (const std::string& value)
        {
            read_angle(m_angles, value.c_str());
            m_anglesChanged();
        }
        typedef MemberCaller1<AnglesKey, const std::string&, &AnglesKey::angleChanged> AngleChangedCaller;

        void anglesChanged (const std::string& value)
        {
            read_angles(m_angles, value.c_str());
            m_anglesChanged();
        }
        typedef MemberCaller1<AnglesKey, const std::string&, &AnglesKey::anglesChanged> AnglesChangedCaller;

        void write (Entity* entity) const
        {
            write_angles(m_angles, entity);
        }
};

#endif