/*	Public domain	*/

#ifndef _FREESG_SG_VIEW_H_
#define _FREESG_SG_VIEW_H_
#include <freesg/sg/begin.h>

struct sg_camera;

/* Managed per-view texture. */
typedef struct sg_view_texture {
	void *node;				/* Pointer to parent node */
	struct sg_view *sv;			/* Pointer to SG_View */
	Uint name;				/* GL texture handle */
	int frame;				/* Animation frame (optional) */
	AG_TexCoord tc;				/* Texture coordinates */
	AG_TAILQ_ENTRY(sg_view_texture) textures;
} SG_ViewTexture;

/* Managed per-view display list. */
typedef struct sg_view_list {
	void *node;				/* Pointer to parent node */
	struct sg_view *sv;			/* Pointer to SG_View */
	Uint name;				/* GL display list handle */
	int frame;				/* Animation frame (optional) */
	AG_TAILQ_ENTRY(sg_view_list) lists;
} SG_ViewList;

typedef struct sg_view {
	struct ag_glview _inherit;

	Uint flags;
#define SG_VIEW_HFILL		0x001
#define SG_VIEW_VFILL		0x002
#define SG_VIEW_EXPAND		(SG_VIEW_HFILL|SG_VIEW_VFILL)
#define SG_VIEW_NO_LIGHTING	0x004 /* Disable lighting */
#define SG_VIEW_NO_DEPTH_TEST	0x008 /* Disable Z-buffering */
#define SG_VIEW_UPDATE_PROJ	0x010 /* Update projection at next draw */
#define SG_VIEW_PANNING		0x020 /* Mouse panning in progress */
#define SG_VIEW_CAMERA_STATUS	0x040 /* Display camera status overlay */
#define SG_VIEW_EDIT		0x080 /* Allow edition commands */
#define SG_VIEW_EDIT_STATUS	0x080 /* Display edition status overlay */
#define SG_VIEW_BGFILL		0x100 /* Clear with background color */

	SG *sg;				/* Scene graph */

	SG *sgTrans;			/* For SG_ViewTransition */
	Uint transFlags;
#define SG_VIEW_TRANSFADE	0x01	/* Fade-out/fade-in */
	AG_Timeout toTransFade;		/* Timeout for fade */
	float transProgress;		/* Transition state */
	AG_Color transFadeColor;	/* Color for fade */
	Uint transDuration;		/* Duration for transition (ms) */

	struct sg_camera *cam;		/* Current camera */
	struct sg_camera *camTrans;	/* Transitioning to camera */

	struct {
		int lx, ly;		/* Last mouse position (for rotation) */
		M_Vector3 rsens;	/* Rotation sensitivity vector */
		M_Vector3 tsens;	/* Translation sensitivity vector */
	} mouse;
	AG_PopupMenu *popup;		/* Popup menu for context */

	AG_Widget *editArea;		/* Edit container widget */
	SG_Node *editNode;		/* Node being edited */

	M_Real rot_yaw_incr;		/* Base yaw increment */
	M_Real rot_pitch_incr;		/* Base pitch increment */
	M_Real rot_roll_incr;		/* Base roll increment */
	M_Real trans_x_incr;		/* Base translation increment */
	M_Real trans_y_incr;
	M_Real trans_z_incr;

	int rot_vel_min;		/* Rotation speed */
	int rot_vel_accel;
	int rot_vel_max;
	int trans_vel_min;		/* Translation speed */
	int trans_vel_accel;
	int trans_vel_max;

	/* Internals used for rotation */
	M_Real trans_x, trans_y, trans_z;
	M_Real rot_yaw, rot_pitch, rot_roll;
	AG_Timeout to_rot_yaw, to_rot_pitch, to_rot_roll;
	AG_Timeout to_trans_x, to_trans_y, to_trans_z;
	AG_Timeout to_move;

	char editStatus[128];		/* Edit status text */
} SG_View;

#define SG_ViewSetBgColor(sv,c)	AG_GLViewSetBgColor(AGGLVIEW(sv),c)

__BEGIN_DECLS
extern AG_WidgetClass sgViewClass;

SG_View	*SG_ViewNew(void *, SG *, Uint);
int      SG_ViewTransition(SG_View *, SG *, SG_Camera *, Uint);
void     SG_ViewSetFadeColor(SG_View *, AG_Color);
void     SG_ViewSetFadeDuration(SG_View *, Uint);
void	 SG_ViewUnProject(SG_View *, int, int, M_Vector3 *, M_Vector3 *);
void	 SG_ViewSetCamera(SG_View *, struct sg_camera *);
__END_DECLS

#include <freesg/sg/close.h>
#endif /* _FREESG_SG_VIEW_H_ */