cl_view.c

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/*
Copyright (C) 1997-2001 Id Software, Inc.
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program 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 General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
// cl_view.c -- player rendering positioning
 
#include "client.h"
 
//=============
//
// development tools for weapons
//
int         gun_frame;
struct model_s  *gun_model;
 
//=============
 
cvar_t      *crosshair;
cvar_t      *cl_testparticles;
cvar_t      *cl_testentities;
cvar_t      *cl_testlights;
cvar_t      *cl_testblend;
 
cvar_t      *cl_stats;
 
extern  cvar_t  *vid_hudscale;
extern  cvar_t  *viewsize;
 
int         r_numdlights;
dlight_t    r_dlights[MAX_DLIGHTS];
 
int         r_numentities;
entity_t    r_entities[MAX_ENTITIES];
 
int         r_numparticles;
particle_t  r_particles[MAX_PARTICLES];
 
lightstyle_t    r_lightstyles[MAX_LIGHTSTYLES];
 
char cl_weaponmodels[MAX_CLIENTWEAPONMODELS][MAX_QPATH];
int num_cl_weaponmodels;
 
/*
====================
V_ClearScene
 
Specifies the model that will be used as the world
====================
*/
void V_ClearScene (void)
{
    r_numdlights = 0;
    r_numentities = 0;
    r_numparticles = 0;
}
 
 
/*
=====================
V_AddEntity
 
=====================
*/
void V_AddEntity (entity_t *ent)
{
    if (r_numentities >= MAX_ENTITIES)
        return;
    r_entities[r_numentities++] = *ent;
}
 
 
/*
=====================
V_AddParticle
 
=====================
*/
void V_AddParticle (vec3_t org, int color, float alpha)
{
    particle_t  *p;
 
    if (r_numparticles >= MAX_PARTICLES)
        return;
    p = &r_particles[r_numparticles++];
    VectorCopy (org, p->origin);
    p->color = color;
    p->alpha = alpha;
}
 
/*
=====================
V_AddLight
 
=====================
*/
void V_AddLight (vec3_t org, float intensity, float r, float g, float b)
{
    dlight_t    *dl;
 
    if (r_numdlights >= MAX_DLIGHTS)
        return;
    dl = &r_dlights[r_numdlights++];
    VectorCopy (org, dl->origin);
    dl->intensity = intensity;
    dl->color[0] = r;
    dl->color[1] = g;
    dl->color[2] = b;
}
 
 
/*
=====================
V_AddLightStyle
 
=====================
*/
void V_AddLightStyle (int style, float r, float g, float b)
{
    lightstyle_t    *ls;
 
    if (style < 0 || style > MAX_LIGHTSTYLES)
        Com_Error (ERR_DROP, "Bad light style %i", style);
    ls = &r_lightstyles[style];
 
    ls->white = r+g+b;
    ls->rgb[0] = r;
    ls->rgb[1] = g;
    ls->rgb[2] = b;
}
 
/*
================
V_TestParticles
 
If cl_testparticles is set, create 4096 particles in the view
================
*/
void V_TestParticles (void)
{
    particle_t  *p;
    int         i, j;
    float       d, r, u;
 
    r_numparticles = MAX_PARTICLES;
    for (i=0 ; i<r_numparticles ; i++)
    {
        d = i*0.25;
        r = 4*((i&7)-3.5);
        u = 4*(((i>>3)&7)-3.5);
        p = &r_particles[i];
 
        for (j=0 ; j<3 ; j++)
            p->origin[j] = cl.refdef.vieworg[j] + cl.v_forward[j]*d +
            cl.v_right[j]*r + cl.v_up[j]*u;
 
        p->color = 8;
        p->alpha = cl_testparticles->value;
    }
}
 
/*
================
V_TestEntities
 
If cl_testentities is set, create 32 player models
================
*/
void V_TestEntities (void)
{
    int         i, j;
    float       f, r;
    entity_t    *ent;
 
    r_numentities = 32;
    memset (r_entities, 0, sizeof(r_entities));
 
    for (i=0 ; i<r_numentities ; i++)
    {
        ent = &r_entities[i];
 
        r = 64 * ( (i%4) - 1.5 );
        f = 64 * (i/4) + 128;
 
        for (j=0 ; j<3 ; j++)
            ent->origin[j] = cl.refdef.vieworg[j] + cl.v_forward[j]*f +
            cl.v_right[j]*r;
 
        ent->model = cl.baseclientinfo.model;
        ent->skin = cl.baseclientinfo.skin;
    }
}
 
/*
================
V_TestLights
 
If cl_testlights is set, create 32 lights models
================
*/
void V_TestLights (void)
{
    int         i, j;
    float       f, r;
    dlight_t    *dl;
 
    r_numdlights = 32;
    memset (r_dlights, 0, sizeof(r_dlights));
 
    for (i=0 ; i<r_numdlights ; i++)
    {
        dl = &r_dlights[i];
 
        r = 64 * ( (i%4) - 1.5 );
        f = 64 * (i/4) + 128;
 
        for (j=0 ; j<3 ; j++)
            dl->origin[j] = cl.refdef.vieworg[j] + cl.v_forward[j]*f +
            cl.v_right[j]*r;
        dl->color[0] = ((i%6)+1) & 1;
        dl->color[1] = (((i%6)+1) & 2)>>1;
        dl->color[2] = (((i%6)+1) & 4)>>2;
        dl->intensity = 200;
    }
}
 
//===================================================================
 
/*
=================
CL_PrepRefresh
 
Call before entering a new level, or after changing dlls
=================
*/
void CL_PrepRefresh (void)
{
    char        mapname[32];
    int         i;
    char        name[MAX_QPATH];
    float       rotate;
    vec3_t      axis;
 
    if (!cl.configstrings[CS_MODELS+1][0])
        return;     // no map loaded
 
    SCR_AddDirtyPoint (0, 0);
    SCR_AddDirtyPoint (viddef.width-1, viddef.height-1);
 
    // let the render dll load the map
    strcpy (mapname, cl.configstrings[CS_MODELS+1] + 5);    // skip "maps/"
    mapname[strlen(mapname)-4] = 0;     // cut off ".bsp"
 
    // register models, pics, and skins
    Com_Printf ("Map: %s\r", mapname); 
    SCR_UpdateScreen ();
    re.BeginRegistration (mapname);
    Com_Printf ("                                     \r");
 
    // precache status bar pics
    Com_Printf ("pics\r"); 
    SCR_UpdateScreen ();
    SCR_TouchPics ();
    Com_Printf ("                                     \r");
 
    CL_RegisterTEntModels ();
 
    num_cl_weaponmodels = 1;
    strcpy(cl_weaponmodels[0], "weapon.md2");
 
    for (i=1 ; i<MAX_MODELS && cl.configstrings[CS_MODELS+i][0] ; i++)
    {
        strcpy (name, cl.configstrings[CS_MODELS+i]);
        name[37] = 0;   // never go beyond one line
        if (name[0] != '*')
            Com_Printf ("%s\r", name); 
        SCR_UpdateScreen ();
        Sys_SendKeyEvents ();   // pump message loop
        if (name[0] == '#')
        {
            // special player weapon model
            if (num_cl_weaponmodels < MAX_CLIENTWEAPONMODELS)
            {
                strncpy(cl_weaponmodels[num_cl_weaponmodels], cl.configstrings[CS_MODELS+i]+1,
                    sizeof(cl_weaponmodels[num_cl_weaponmodels]) - 1);
                num_cl_weaponmodels++;
            }
        } 
        else
        {
            cl.model_draw[i] = re.RegisterModel (cl.configstrings[CS_MODELS+i]);
            if (name[0] == '*')
                cl.model_clip[i] = CM_InlineModel (cl.configstrings[CS_MODELS+i]);
            else
                cl.model_clip[i] = NULL;
        }
        if (name[0] != '*')
            Com_Printf ("                                     \r");
    }
 
    Com_Printf ("images\r", i); 
    SCR_UpdateScreen ();
    for (i=1 ; i<MAX_IMAGES && cl.configstrings[CS_IMAGES+i][0] ; i++)
    {
        cl.image_precache[i] = re.RegisterPic (cl.configstrings[CS_IMAGES+i]);
        Sys_SendKeyEvents ();   // pump message loop
    }
    
    Com_Printf ("                                     \r");
    for (i=0 ; i<MAX_CLIENTS ; i++)
    {
        if (!cl.configstrings[CS_PLAYERSKINS+i][0])
            continue;
        Com_Printf ("client %i\r", i); 
        SCR_UpdateScreen ();
        Sys_SendKeyEvents ();   // pump message loop
        CL_ParseClientinfo (i);
        Com_Printf ("                                     \r");
    }
 
    CL_LoadClientinfo (&cl.baseclientinfo, "unnamed\\male/grunt");
 
    // set sky textures and speed
    Com_Printf ("sky\r", i); 
    SCR_UpdateScreen ();
    rotate = atof (cl.configstrings[CS_SKYROTATE]);
    sscanf (cl.configstrings[CS_SKYAXIS], "%f %f %f", 
        &axis[0], &axis[1], &axis[2]);
    re.SetSky (cl.configstrings[CS_SKY], rotate, axis);
    Com_Printf ("                                     \r");
 
    // the renderer can now free unneeded stuff
    re.EndRegistration ();
 
    // clear any lines of console text
    Con_ClearNotify ();
 
    SCR_UpdateScreen ();
    cl.refresh_prepped = true;
    cl.force_refdef = true; // make sure we have a valid refdef
 
    // start the cd track
    int track = atoi(cl.configstrings[CS_CDTRACK]);
    if (!CDAudio_Play(track, true))
        Miniaudio_Play(track, true);
}
 
/*
====================
CalcFov
====================
*/
float CalcFov (float fov_x, float width, float height)
{
    float   a;
    float   x;
 
    if (fov_x < 1 || fov_x > 179)
        Com_Error (ERR_DROP, "Bad fov: %f", fov_x);
 
    x = width/tan(fov_x/360*M_PI);
 
    a = atan (height/x);
 
    a = a*360/M_PI;
 
    return a;
}
 
//============================================================================
 
// gun frame debugging functions
void V_Gun_Next_f (void)
{
    gun_frame++;
    Com_Printf ("frame %i\n", gun_frame);
}
 
void V_Gun_Prev_f (void)
{
    gun_frame--;
    if (gun_frame < 0)
        gun_frame = 0;
    Com_Printf ("frame %i\n", gun_frame);
}
 
void V_Gun_Model_f (void)
{
    char    name[MAX_QPATH];
 
    if (Cmd_Argc() != 2)
    {
        gun_model = NULL;
        return;
    }
    Com_sprintf (name, sizeof(name), "models/%s/tris.md2", Cmd_Argv(1));
    gun_model = re.RegisterModel (name);
}
 
//============================================================================
 
 
/*
=================
SCR_DrawCrosshair
=================
*/
void SCR_DrawCrosshair (void)
{
    if (!crosshair->value)
        return;
 
    if (crosshair->modified)
    {
        crosshair->modified = false;
        SCR_TouchPics ();
    }
 
    if (!crosshair_pic[0])
        return;
 
    re.DrawPic (scr_vrect.x + ((scr_vrect.width - crosshair_width)>>1)
    , scr_vrect.y + ((scr_vrect.height - crosshair_height)>>1), crosshair_pic);
}
 
/*
==================
V_RenderView
 
==================
*/
void V_RenderView( float stereo_separation )
{
    extern int entitycmpfnc( const entity_t *, const entity_t * );
 
    if (cls.state != ca_active)
    {
        re.EndWorldRenderpass();
        return;
    }
 
    if (!cl.refresh_prepped)
    {
        re.EndWorldRenderpass();
        return;         // still loading
    }
 
    if (cl_timedemo->value)
    {
        if (!cl.timedemo_start)
            cl.timedemo_start = Sys_Milliseconds ();
        cl.timedemo_frames++;
    }
 
    // an invalid frame will just use the exact previous refdef
    // we can't use the old frame if the video mode has changed, though...
    if ( cl.frame.valid && (cl.force_refdef || !cl_paused->value || viewsize->modified) )
    {
        cl.force_refdef = false;
        viewsize->modified = false;
 
        V_ClearScene ();
 
        // build a refresh entity list and calc cl.sim*
        // this also calls CL_CalcViewValues which loads
        // v_forward, etc.
        CL_AddEntities ();
 
        if (cl_testparticles->value)
            V_TestParticles ();
        if (cl_testentities->value)
            V_TestEntities ();
        if (cl_testlights->value)
            V_TestLights ();
        if (cl_testblend->value)
        {
            cl.refdef.blend[0] = 1;
            cl.refdef.blend[1] = 0.5;
            cl.refdef.blend[2] = 0.25;
            cl.refdef.blend[3] = 0.5;
        }
 
        // offset vieworg appropriately if we're doing stereo separation
        if ( stereo_separation != 0 )
        {
            vec3_t tmp;
 
            VectorScale( cl.v_right, stereo_separation, tmp );
            VectorAdd( cl.refdef.vieworg, tmp, cl.refdef.vieworg );
        }
 
        // never let it sit exactly on a node line, because a water plane can
        // dissapear when viewed with the eye exactly on it.
        // the server protocol only specifies to 1/8 pixel, so add 1/16 in each axis
        cl.refdef.vieworg[0] += 1.0/16;
        cl.refdef.vieworg[1] += 1.0/16;
        cl.refdef.vieworg[2] += 1.0/16;
 
        cl.refdef.x = scr_vrect.x;
        cl.refdef.y = scr_vrect.y;
        cl.refdef.width = scr_vrect.width;
        cl.refdef.height = scr_vrect.height;
        cl.refdef.fov_y = CalcFov (cl.refdef.fov_x, cl.refdef.width, cl.refdef.height);
        cl.refdef.time = cl.time*0.001;
 
        cl.refdef.areabits = cl.frame.areabits;
 
        if (!cl_add_entities->value)
            r_numentities = 0;
        if (!cl_add_particles->value)
            r_numparticles = 0;
        if (!cl_add_lights->value)
            r_numdlights = 0;
        if (!cl_add_blend->value)
        {
            VectorClear (cl.refdef.blend);
        }
 
        cl.refdef.num_entities = r_numentities;
        cl.refdef.entities = r_entities;
        cl.refdef.num_particles = r_numparticles;
        cl.refdef.particles = r_particles;
        cl.refdef.num_dlights = r_numdlights;
        cl.refdef.dlights = r_dlights;
        cl.refdef.lightstyles = r_lightstyles;
 
        cl.refdef.rdflags = cl.frame.playerstate.rdflags;
 
        // sort entities for better cache locality
        qsort( cl.refdef.entities, cl.refdef.num_entities, sizeof( cl.refdef.entities[0] ), (int (*)(const void *, const void *))entitycmpfnc );
    }
 
    re.RenderFrame (&cl.refdef);
    if (cl_stats->value)
        Com_Printf ("ent:%i  lt:%i  part:%i\n", r_numentities, r_numdlights, r_numparticles);
    if ( log_stats->value && ( log_stats_file != 0 ) )
        fprintf( log_stats_file, "%i,%i,%i,",r_numentities, r_numdlights, r_numparticles);
 
 
    SCR_AddDirtyPoint (scr_vrect.x, scr_vrect.y);
    SCR_AddDirtyPoint (scr_vrect.x+scr_vrect.width-1,
        scr_vrect.y+scr_vrect.height-1);
 
    SCR_DrawCrosshair ();
}
 
 
/*
=============
V_Viewpos_f
=============
*/
void V_Viewpos_f (void)
{
    Com_Printf ("(%i %i %i) : %i\n", (int)cl.refdef.vieworg[0],
        (int)cl.refdef.vieworg[1], (int)cl.refdef.vieworg[2], 
        (int)cl.refdef.viewangles[YAW]);
}
 
/*
=============
V_Init
=============
*/
void V_Init (void)
{
    Cmd_AddCommand ("gun_next", V_Gun_Next_f);
    Cmd_AddCommand ("gun_prev", V_Gun_Prev_f);
    Cmd_AddCommand ("gun_model", V_Gun_Model_f);
 
    Cmd_AddCommand ("viewpos", V_Viewpos_f);
 
    crosshair = Cvar_Get ("crosshair", "0", CVAR_ARCHIVE);
 
    cl_testblend = Cvar_Get ("cl_testblend", "0", 0);
    cl_testparticles = Cvar_Get ("cl_testparticles", "0", 0);
    cl_testentities = Cvar_Get ("cl_testentities", "0", 0);
    cl_testlights = Cvar_Get ("cl_testlights", "0", 0);
 
    cl_stats = Cvar_Get ("cl_stats", "0", 0);
}