#include "boolean.h"

/* Physics grid constants. */

#define GRID_WIDTH 25
#define GRID_HEIGHT 9

#define POSITION_RANGE 100.0f

#define NUM_SPRINGS (2 * GRID_WIDTH * GRID_HEIGHT - GRID_WIDTH - GRID_HEIGHT)

/* Physics misc constants. */

#define SPRING_K 18.0f
#define FRICTION 0.25f

/* Graphics grid constants */

#define PAINT_GRID_WIDTH 50
#define PAINT_GRID_HEIGHT 50

#define PAINT_POSITION_RANGE_X 4.5f
#define PAINT_POSITION_RANGE_Y 4.5f
#define PAINT_POSITION_RANGE_Z 4.5f

/* Structs */

typedef struct _point_3d {
	float x, y, z;
} Point3D, Vector3D;

typedef struct _Object {
	Point3D position;
	Point3D prevPosition;
	
	Vector3D force;
	
	Bool anchor;
} Object;

typedef struct _Spring {
	Object* a;
	Object* b;
	
	Vector3D offset;
} Spring;

typedef struct _Model {
	Object object[GRID_WIDTH][GRID_HEIGHT];
	Spring spring[NUM_SPRINGS];
} Model;

/* Functions. */

Model* initModel();
void stepModel(Model* model);
void drawModel(Model* model);

void initAnimation(Model* model);
void stepAnimation(Model* model);