/*
 * Copyright (c) 2008-2009 Bill Whitacre http://rampancy.g0dsoft.com
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
*/

#ifndef RAT_PHYSICS_SHAPE_POLYGON
#define RAT_PHYSICS_SHAPE_POLYGON

#include "hull.h"

typedef struct rat_polygon_axis
{
	vector2 normal;
	rat_real dist;
} rat_polygon_axis;

typedef struct rat_obb_data
{
	vector2 extents;
	vector2 corners[4];
	vector2 axes[2];
} rat_obb_data;

typedef struct rat_hull_polygon
{
	rat_hull_type type;
	rat_hull_class *clas;

	void *userdata;
	aabb cached_bb;

	// info
	unsigned int numverts;
	vector2 pos;
	rat_real angle;

	vector2 *verts;
	rat_polygon_axis *axes;

	// these are generated by the world transform.  part of cache.
	vector2 *world_verts;
	rat_polygon_axis *world_axes;
} rat_hull_polygon;

#ifdef __cplusplus
extern "C" {
#endif

rat_hull *rat_hull_polygon_create(vector2 pos,unsigned int numverts,vector2 *verts);
rat_hull *rat_hull_polygon_create_box(vector2 pos,vector2 extent);
void rat_hull_polygon_destroy(rat_hull *hull);

void rat_hull_polygon_update_cache(rat_hull *hull,int is_static);

int rat_hull_polygon_get_verts(rat_hull *hull,vector2 **verts);

rat_real rat_hull_polygon_get_angle(rat_hull *hull);
vector2 rat_hull_polygon_get_pos(rat_hull *hull);

void rat_hull_polygon_set_angle(rat_hull *hull,rat_real angle);
void rat_hull_polygon_set_pos(rat_hull *hull,vector2 pos);

int rat_hull_polygon_point_query(rat_hull *hull,vector2 point);

int rat_polygon_point_manifold_depth(vector2 *verts,rat_polygon_axis *axes,unsigned int numverts,vector2 point,rat_real *min_dist);
rat_real rat_polygon_point_dist(vector2 *verts,rat_polygon_axis *axes,unsigned int numverts,vector2 point);
rat_real rat_polygon_axis_value(vector2 *verts,unsigned int numverts,rat_polygon_axis axis);

#ifdef __cplusplus
};
#endif

#endif