1 #include "../../warpzonelib/mathlib.qh"
3 #ifndef SLIDER_DECIBELS_H
4 #define SLIDER_DECIBELS_H
6 CLASS(XonoticDecibelsSlider, XonoticSlider)
7 METHOD(XonoticDecibelsSlider, loadCvars, void(entity))
8 METHOD(XonoticDecibelsSlider, saveCvars, void(entity))
9 METHOD(XonoticDecibelsSlider, valueToText, string(entity, float))
10 ENDCLASS(XonoticDecibelsSlider)
11 entity makeXonoticDecibelsSlider(float, float, float, string);
16 float toDecibelOfSquare(float f, float mi)
18 float A = log(10) / 20; // note: about 0.115; inverse: about 8.686
23 float y = exp(1 + A * mi);
25 return mi + (t - mi) * (f / y);
30 float fromDecibelOfSquare(float f, float mi)
32 float A = log(10) / 20; // note: about 0.115; inverse: about 8.686
37 float y = exp(1 + A * mi);
39 return y * ((f - mi) / (t - mi));
44 entity makeXonoticDecibelsSlider(float theValueMin, float theValueMax, float theValueStep, string theCvar)
47 me = NEW(XonoticDecibelsSlider);
48 me.configureXonoticSlider(me, theValueMin, theValueMax, theValueStep, theCvar);
51 void XonoticDecibelsSlider_loadCvars(entity me)
58 v = cvar(me.cvarName);
61 if(v > fromDecibelOfSquare(me.valueMax - 0.5 * me.valueStep, me.valueMin))
62 Slider_setValue(me, me.valueMax);
64 Slider_setValue(me, me.valueStep * floor(0.5 + toDecibelOfSquare(v, me.valueMin) / me.valueStep) );
66 void XonoticDecibelsSlider_saveCvars(entity me)
71 if(me.value > me.valueMax - 0.5 * me.valueStep)
72 cvar_set(me.cvarName, ftos(fromDecibelOfSquare(me.valueMax, me.valueMin)));
74 cvar_set(me.cvarName, ftos(fromDecibelOfSquare(me.value, me.valueMin)));
77 float autocvar_menu_snd_sliderscale;
78 string XonoticDecibelsSlider_valueToText(entity me, float v)
80 if(v > me.valueMax - 0.5 * me.valueStep)
81 return CTX(_("VOL^MAX"));
82 else if(v <= me.valueMin)
83 return CTX(_("VOL^OFF"));
84 else if(autocvar_menu_snd_sliderscale == 3) // fake percent scale
85 return sprintf("%d %%", (v - me.valueMin) / (me.valueMax - me.valueMin) * 100);
86 else if(autocvar_menu_snd_sliderscale == 2) // 0..10 scale
87 return sprintf("%.1f", (v - me.valueMin) / (me.valueMax - me.valueMin) * 10);
88 else if(autocvar_menu_snd_sliderscale == 1) // real percent scale
89 return sprintf("%.2f %%", fromDecibelOfSquare(v, me.valueMin) * 100);
91 return sprintf(_("%s dB"), ftos_decimals(toDecibelOfSquare(fromDecibelOfSquare(v, me.valueMin), 0), me.valueDigits));
94 void _TEST_XonoticDecibelsSlider()
97 for(i = -400; i < 0; ++i)
100 float v = fromDecibelOfSquare(db, -40);
101 float dbv = toDecibelOfSquare(v, -40);
103 printf("%f -> %f -> %f (diff: %f)\n", db, v, dbv, d);
104 TEST_Check(fabs(d) > 0.02);