// refresh.h -- public interface to refresh functions

#define	MAXCLIPPLANES	11

#define	TOP_RANGE		16	// soldier uniform colors
#define	BOTTOM_RANGE	96

//=============================================================================

typedef struct efrag_s {
    struct mleaf_s *leaf;
    struct efrag_s *leafnext;
    struct entity_s *entity;
    struct efrag_s *entnext;
} efrag_t;


typedef struct entity_s {
    qboolean forcelink;		// model changed

    int update_type;

    entity_state_t baseline;	// to fill in defaults in updates

    double msgtime;		// time of last update
    vec3_t msg_origins[2];	// last two updates (0 is newest)       
    vec3_t origin;
    vec3_t msg_angles[2];	// last two updates (0 is newest)
    vec3_t angles;
    struct model_s *model;	// NULL = no model
    struct efrag_s *efrag;	// linked list of efrags
    int frame;
    float syncbase;		// for client-side animations
    byte *colormap;
    int effects;		// light, particals, etc
    int skinnum;		// for Alias models
    int visframe;		// last frame this entity was
    //  found in an active leaf

    int dlightframe;		// dynamic lighting
    int dlightbits;

// FIXME: could turn these into a union
    int trivial_accept;
    struct mnode_s *topnode;	// for bmodels, first world node
    //  that splits bmodel, or NULL if
    //  not split
} entity_t;

typedef struct {
    vrect_t vrect;		// subwindow in video for refresh
    // FIXME: not need vrect next field here?
    vrect_t aliasvrect;		// scaled Alias version
    int vrectright, vrectbottom;	// right & bottom screen coords
    int aliasvrectright, aliasvrectbottom;	// scaled Alias versions
    float vrectrightedge;	// rightmost right edge we care about,
    //  for use in edge list
    float fvrectx, fvrecty;	// for floating-point compares
    float fvrectx_adj, fvrecty_adj;	// left and top edges, for clamping
    int vrect_x_adj_shift20;	// (vrect.x + 0.5 - epsilon) << 20
    int vrectright_adj_shift20;	// (vrectright + 0.5 - epsilon) << 20
    float fvrectright_adj, fvrectbottom_adj;
    // right and bottom edges, for clamping
    float fvrectright;		// rightmost edge, for Alias clamping
    float fvrectbottom;		// bottommost edge, for Alias clamping
    float horizontalFieldOfView;	// at Z = 1.0, this many X is visible 
    // 2.0 = 90 degrees
    float xOrigin;		// should probably allways be 0.5
    float yOrigin;		// between be around 0.3 to 0.5

    vec3_t vieworg;
    vec3_t viewangles;

    int ambientlight;
} refdef_t;


//
// refresh
//
extern int reinit_surfcache;


extern refdef_t r_refdef;
extern vec3_t r_origin, vpn, vright, vup;

extern struct texture_s *r_notexture_mip;


void R_Init(void);
void R_InitTextures(void);
void R_InitEfrags(void);
void R_RenderView(void);	// must set r_refdef first
void R_ViewChanged(vrect_t * pvrect, int lineadj, float aspect);
								// called whenever r_refdef or vid change
void R_InitSky(struct texture_s *mt);	// called at level load

void R_AddEfrags(entity_t * ent);
void R_RemoveEfrags(entity_t * ent);

void R_NewMap(void);


void R_ParseParticleEffect(void);
void R_RunParticleEffect(vec3_t org, vec3_t dir, int color, int count);
void R_RocketTrail(vec3_t start, vec3_t end, int type);

void R_EntityParticles(entity_t * ent);
void R_BlobExplosion(vec3_t org);
void R_ParticleExplosion(vec3_t org);
void R_LavaSplash(vec3_t org);
void R_TeleportSplash(vec3_t org);

void R_PushDlights(void);


//
// surface cache related
//
extern int reinit_surfcache;	// if 1, surface cache is currently empty and
extern qboolean r_cache_thrash;	// set if thrashing the surface cache

int D_SurfaceCacheForRes(int width, int height);
void D_FlushCaches(void);
void D_DeleteSurfaceCache(void);
void D_InitCaches(void *buffer, int size);
void R_SetVrect(vrect_t * pvrect, vrect_t * pvrectin, int lineadj);