vmap/plugins/entity/scale.h

/*
   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_SCALE_H )
#define INCLUDED_SCALE_H

#include "ientity.h"

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

const Vector3 SCALEKEY_IDENTITY = Vector3(1, 1, 1);

inline void default_scale(Vector3 &scale)
{
	scale = SCALEKEY_IDENTITY;
}

inline void read_scale(Vector3 &scalevec, const char *value)
{
	float scale;
	if (!string_parse_float(value, scale)
	    || scale == 0) {
		default_scale(scalevec);
	} else {
		scalevec = Vector3(scale, scale, scale);
	}
}

inline void read_scalevec(Vector3 &scale, const char *value)
{
	if (!string_parse_vector3(value, scale)
	    || scale[0] == 0
	    || scale[1] == 0
	    || scale[2] == 0) {
		default_scale(scale);
	}
}

inline void write_scale(const Vector3 &scale, Entity *entity)
{
	if (scale[0] == 1 && scale[1] == 1 && scale[2] == 1) {
		entity->setKeyValue("modelscale", "");
		entity->setKeyValue("modelscale_vec", "");
	} else {
		char value[64];

		if (scale[0] == scale[1] && scale[0] == scale[2]) {
			sprintf(value, "%f", scale[0]);
			entity->setKeyValue("modelscale_vec", "");
			entity->setKeyValue("modelscale", value);
		} else {
			sprintf(value, "%f %f %f", scale[0], scale[1], scale[2]);
			entity->setKeyValue("modelscale", "");
			entity->setKeyValue("modelscale_vec", value);
		}
	}
}

inline Vector3 scale_scaled(const Vector3 &scale, const Vector3 &scaling)
{
	return matrix4_get_scale_vec3(
		matrix4_multiplied_by_matrix4(
			matrix4_scale_for_vec3(scale),
			matrix4_scale_for_vec3(scaling)
			)
		);
}


class ScaleKey {
Callback<void()> m_scaleChanged;
public:
Vector3 m_scale;


ScaleKey(const Callback<void()> &scaleChanged)
	: m_scaleChanged(scaleChanged), m_scale(SCALEKEY_IDENTITY)
{
}

void uniformScaleChanged(const char *value)
{
	read_scale(m_scale, value);
	m_scaleChanged();
}

typedef MemberCaller<ScaleKey, void (const char *), &ScaleKey::uniformScaleChanged> UniformScaleChangedCaller;

void scaleChanged(const char *value)
{
	read_scalevec(m_scale, value);
	m_scaleChanged();
}

typedef MemberCaller<ScaleKey, void (const char *), &ScaleKey::scaleChanged> ScaleChangedCaller;

void write(Entity *entity) const
{
	write_scale(m_scale, entity);
}
};


#endif