Function render_world

source/src/worldrender.cpp:297–338

// does some out of date view frustrum optimisation that doesn't contribute much anymore

void render_world(float vx, float vy, float vh, float changelod, int yaw, int pitch, float fov, float fovy, int w, int h)
{
    loopi(LARGEST_FACTOR) stats[i] = 0;
    min_lod = minimap || (player1->isspectating() && player1->spectatemode == SM_OVERVIEW) ? MAX_LOD : MIN_LOD+iabs(pitch)/12;
    yaw = 360-yaw;
    float widef = fov/75.0f;
    int cdist = iabs(yaw%90-45);
    if(cdist<7)    // hack to avoid popup at high fovs at 45 yaw
    {
        min_lod = max(min_lod, (int)(MIN_LOD+(10-cdist)/1.0f*widef)); // less if lod worked better
        widef = 1.0f;
    }
    lod = (int)(lod*changelod);
    if(lod<minlod) lod = minlod;
    if(lod>MAX_LOD) lod = MAX_LOD;
    lodtop = lodbot = lodleft = lodright = min_lod;
    if(yaw>45 && yaw<=135)
    {
        lodleft = lod;
        distlod(lodtop, lodbot, yaw-45, widef);
    }
    else if(yaw>135 && yaw<=225)
    {
        lodbot = lod;
        distlod(lodleft, lodright, yaw-135, widef);
    }
    else if(yaw>225 && yaw<=315)
    {
        lodright = lod;
        distlod(lodbot, lodtop, yaw-225, widef);
    }
    else
    {
        lodtop = lod;
        distlod(lodright, lodleft, yaw<=45 ? yaw+45 : yaw-315, widef);
    }
    render_floor = pitch<0.5f*fovy;
    render_ceil  = -pitch<0.5f*fovy;

    render_seg_new(vx, vy, vh, MAX_MIP, 0, 0, ssize>>MAX_MIP, ssize>>MAX_MIP);
    mipstats(stats);
}