Current File : //data/old/usr/local/include/gpac/internal/camera.h
/*
* GPAC - Multimedia Framework C SDK
*
* Authors: Jean Le Feuvre
* Copyright (c) Telecom ParisTech 2000-2012
* All rights reserved
*
* This file is part of GPAC / Scene Compositor sub-project
*
* GPAC is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GPAC 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef _CAMERA_H_
#define _CAMERA_H_
//#include <gpac/internal/compositor_dev.h>
#include <gpac/scenegraph_vrml.h>
/*camera flags*/
enum
{
/*if set frustum needs to be recomputed
we avoid computing it at each frame/interaction since that's a lot of matrix maths*/
CAM_IS_DIRTY = 1,
/*if set when ortho, indicates the viewport matrix shall be used when computing modelview (2D only)*/
CAM_HAS_VIEWPORT = 1<<2,
/*if set when ortho to disable LookAt mode*/
CAM_NO_LOOKAT = 1<<3,
};
enum
{
/*only valid at root node*/
CULL_NOT_SET = 0,
/*subtree completely outside view vol*/
CULL_OUTSIDE,
/*subtree completely inside view vol*/
CULL_INSIDE,
/*subtree overlaps view vol - FIXME: would be nice to keep track of intersecting planes*/
CULL_INTERSECTS
};
/*navigation info flags - non-VRML ones are simply blaxxun contact ones */
enum
{
/*headlight is on*/
NAV_HEADLIGHT = 1,
/*navigtion is selectable*/
NAV_SELECTABLE = 1<<1,
/*any navigation (eg, user-interface navigation control allowed)*/
NAV_ANY = 1<<2
};
/*frustum object*/
enum
{
FRUS_NEAR_PLANE = 0,
FRUS_FAR_PLANE,
FRUS_LEFT_PLANE,
FRUS_RIGHT_PLANE,
FRUS_BOTTOM_PLANE,
FRUS_TOP_PLANE
};
enum
{
/*nothing detected*/
CF_NONE = 0,
/*collision detected*/
CF_COLLISION = 1,
/*gravity detecion enabled*/
CF_DO_GRAVITY = (1<<1),
/*gravity detected*/
CF_GRAVITY = (1<<2),
/*viewpoint is stored at end of animation*/
CF_STORE_VP = (1<<3),
};
typedef struct _camera
{
/*this flag MUST be set by the owner of the camera*/
Bool is_3D;
u32 flags;
/*viewport info*/
GF_Rect vp;
/*not always same as VP due to aspect ratio*/
Fixed width, height;
Fixed z_near, z_far;
/*current vectors*/
Fixed fieldOfView;
SFVec3f up, position, target;
/*initial vp for reset*/
SFVec3f vp_position;
SFRotation vp_orientation;
Fixed vp_fov, vp_dist;
/*animation path*/
SFVec3f start_pos, end_pos;
SFRotation start_ori, end_ori;
Fixed start_fov, end_fov;
/*for 2D cameras we never animate except for vp reset*/
Fixed start_zoom, end_zoom;
SFVec2f start_trans, start_rot;
/*center of examine movement*/
SFVec3f examine_center;
/*anim*/
u32 anim_len, anim_start;
Bool jumping;
Fixed dheight;
/*navigation info - overwridden by any bindable NavigationInfo node*/
u32 navigation_flags, navigate_mode;
SFVec3f avatar_size;
Fixed visibility, speed;
Bool had_nav_info;
u32 had_viewpoint;
/*last camera position before collision& gravity detection*/
SFVec3f last_pos;
u32 collide_flags;
/*collision point in world coord*/
SFVec3f collide_point;
/*collide dist in world coord, used to check if we have a closer collision*/
Fixed collide_dist;
/*ground in world coord*/
SFVec3f ground_point;
/*ground dist in world coord, used to check if we have a closer ground*/
Fixed ground_dist;
/*for obstacle detection*/
Bool last_had_ground;
Bool last_had_col;
/*projection & modelview matrices*/
GF_Matrix projection, modelview;
/*unprojection matrix = INV(P*M) used for screen->world compute*/
GF_Matrix unprojection;
/*viewport matrix*/
GF_Matrix viewport;
/*frustum planes*/
GF_Plane planes[6];
/*p vertex idx per plane (for bbox-frustum intersection checks)*/
u32 p_idx[6];
/*frustrum bounding sphere (for sphere-sphere frustum intersection checks)*/
SFVec3f center;
Fixed radius;
GF_BBox world_bbox;
} GF_Camera;
/*invalidate camera to force recompute of all params*/
void camera_invalidate(GF_Camera *cam);
/*updates camera. user transform is only used in 2D to set global user zoom/pan/translate*/
void camera_update(GF_Camera *cam, GF_Matrix2D *user_transform, Bool center_coords);
/*updates camera. user transform is only used in 2D to set global user zoom/pan/translate + stereo param*/
void camera_update_stereo(GF_Camera *cam, GF_Matrix2D *user_transform, Bool center_coords, Fixed horizontal_shift, Fixed viewing_distance, Fixed viewing_distance_offset, u32 camera_layout);
/*reset to last viewport*/
void camera_reset_viewpoint(GF_Camera *cam, Bool animate);
/*move camera to given vp*/
void camera_move_to(GF_Camera *cam, SFVec3f pos, SFVec3f target, SFVec3f up);
Bool camera_animate(GF_Camera *cam);
void camera_stop_anim(GF_Camera *cam);
/*start jump mode*/
void camera_jump(GF_Camera *cam);
void camera_set_vectors(GF_Camera *cam, SFVec3f pos, SFRotation ori, Fixed fov);
SFRotation camera_get_orientation(SFVec3f pos, SFVec3f target, SFVec3f up);
SFVec3f camera_get_pos_dir(GF_Camera *cam);
SFVec3f camera_get_target_dir(GF_Camera *cam);
SFVec3f camera_get_right_dir(GF_Camera *cam);
void camera_set_2d(GF_Camera *cam);
#endif
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