engineinfo.qc

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#include "engineinfo.qh"

#include <client/draw.qh>

// Engine info (#13)

void HUD_EngineInfo_Export(int fh)
{
    // allow saving cvars that aesthetically change the panel into hud skin files
}

float prevfps;
float prevfps_time;
int framecounter;

float frametimeavg;
float frametimeavg1; // 1 frame ago
float frametimeavg2; // 2 frames ago
float autocvar_hud_panel_engineinfo_framecounter_exponentialmovingaverage;
float autocvar_hud_panel_engineinfo_framecounter_exponentialmovingaverage_new_weight;
float autocvar_hud_panel_engineinfo_framecounter_exponentialmovingaverage_instantupdate_change_threshold;
void HUD_EngineInfo()
{
    if(!autocvar__hud_configure)
    {
        if(!autocvar_hud_panel_engineinfo) return;
    }

    HUD_Panel_LoadCvars();
    vector pos, mySize;
    pos = panel_pos;
    mySize = panel_size;

    if (autocvar_hud_panel_engineinfo_dynamichud)
        HUD_Scale_Enable();
    else
        HUD_Scale_Disable();
    HUD_Panel_DrawBg();
    if(panel_bg_padding)
    {
        pos += '1 1 0' * panel_bg_padding;
        mySize -= '2 2 0' * panel_bg_padding;
    }

    float currentTime = gettime(GETTIME_FRAMESTART);
    if(autocvar_hud_panel_engineinfo_framecounter_exponentialmovingaverage)
    {
        float currentframetime = currentTime - prevfps_time;
        frametimeavg = (frametimeavg + frametimeavg1 + frametimeavg2 + currentframetime)/4; // average three frametimes into framecounter for slightly more stable fps readings :P
        frametimeavg2 = frametimeavg1;
        frametimeavg1 = frametimeavg;

        float weight;
        weight = autocvar_hud_panel_engineinfo_framecounter_exponentialmovingaverage_new_weight;
        if(currentframetime > 0.0001) // filter out insane values which sometimes seem to occur and throw off the average? If you are getting 10,000 fps or more, then you don't need a framerate counter.
        {
            if(fabs(prevfps - (1/frametimeavg)) > prevfps * autocvar_hud_panel_engineinfo_framecounter_exponentialmovingaverage_instantupdate_change_threshold) // if there was a big jump in fps, just force prevfps at current (1/currentframetime) to make big updates instant
                prevfps = (1/currentframetime);
            prevfps = (1 - weight) * prevfps + weight * (1/frametimeavg); // framecounter just used so there's no need for a new variable, think of it as "frametime average"
        }
        prevfps_time = currentTime;
    }
    else
    {
        framecounter += 1;
        if(currentTime - prevfps_time > autocvar_hud_panel_engineinfo_framecounter_time)
        {
            prevfps = framecounter/(currentTime - prevfps_time);
            framecounter = 0;
            prevfps_time = currentTime;
        }
    }

    vector color = HUD_Get_Num_Color(prevfps, 100, true);
    drawstring_aspect(pos, sprintf(_("FPS: %.*f"), autocvar_hud_panel_engineinfo_framecounter_decimals, prevfps), mySize, color, panel_fg_alpha, DRAWFLAG_NORMAL);
}