#ifdef IMPLEMENTATION
+float toDecibelOfSquare(float f, float mi)
+{
+ float A = log(10) / 20; // note: about 0.115; inverse: about 8.686
+ if(mi != 0)
+ {
+ // linear scale part
+ float t = 1 / A + mi;
+ float y = exp(1 + A * mi);
+ if(f <= y)
+ return mi + (t - mi) * (f / y);
+ }
+ return log(f) / A;
+}
+
+float fromDecibelOfSquare(float f, float mi)
+{
+ float A = log(10) / 20; // note: about 0.115; inverse: about 8.686
+ if(mi != 0)
+ {
+ // linear scale part
+ float t = 1 / A + mi;
+ float y = exp(1 + A * mi);
+ if(f <= t)
+ return y * ((f - mi) / (t - mi));
+ }
+ return exp(A * f);
+}
+
entity makeXonoticDecibelsSlider(float theValueMin, float theValueMax, float theValueStep, string theCvar)
{
entity me;
me.configureXonoticSlider(me, theValueMin, theValueMax, theValueStep, theCvar);
return me;
}
-void loadCvarsXonoticDecibelsSlider(entity me)
+void XonoticDecibelsSlider_loadCvars(entity me)
{
float v;
return;
v = cvar(me.cvarName);
- if(v >= 0.98)
- setValueSlider( me, 0 );
- else if(v < 0.0005)
- setValueSlider( me, -1000000 );
+
+ // snapping
+ if(v > fromDecibelOfSquare(me.valueMax - 0.5 * me.valueStep, me.valueMin))
+ Slider_setValue(me, me.valueMax);
else
- setValueSlider( me, 0.1 * floor(0.5 + 10.0 * log10(cvar(me.cvarName)) * 10) );
+ Slider_setValue(me, me.valueStep * floor(0.5 + toDecibelOfSquare(v, me.valueMin) / me.valueStep) );
}
-void saveCvarsXonoticDecibelsSlider(entity me)
+void XonoticDecibelsSlider_saveCvars(entity me)
{
if not(me.cvarName)
return;
- if(me.value >= -0.1)
- cvar_set(me.cvarName, "1");
- if(me.value < -33)
- cvar_set(me.cvarName, "0");
+ if(me.value > me.valueMax - 0.5 * me.valueStep)
+ cvar_set(me.cvarName, ftos(fromDecibelOfSquare(me.valueMax, me.valueMin)));
else
- cvar_set(me.cvarName, ftos(pow(10, me.value / 10)));
+ cvar_set(me.cvarName, ftos(fromDecibelOfSquare(me.value, me.valueMin)));
+}
+
+float autocvar_menu_snd_sliderscale;
+string XonoticDecibelsSlider_valueToText(entity me, float v)
+{
+ if(v > me.valueMax - 0.5 * me.valueStep)
+ return CTX(_("VOL^MAX"));
+ else if(v <= me.valueMin)
+ return CTX(_("VOL^OFF"));
+ else if(autocvar_menu_snd_sliderscale == 3) // fake percent scale
+ return sprintf(_("%d %%"), (v - me.valueMin) / (me.valueMax - me.valueMin) * 100);
+ else if(autocvar_menu_snd_sliderscale == 2) // 0..10 scale
+ return sprintf(_("%.1f"), (v - me.valueMin) / (me.valueMax - me.valueMin) * 10);
+ else if(autocvar_menu_snd_sliderscale == 1) // real percent scale
+ return sprintf(_("%.2f %%"), fromDecibelOfSquare(v, me.valueMin) * 100);
+ else // decibel scale
+ return sprintf(_("%s dB"), ftos_decimals(toDecibelOfSquare(fromDecibelOfSquare(v, me.valueMin), 0), me.valueDigits));
}
-string valueToTextXonoticDecibelsSlider(entity me, float v)
+void _TEST_XonoticDecibelsSlider()
{
- if(v < -33)
- return "OFF";
- else if(v >= -0.1)
- return "MAX";
- return strcat(SUPER(XonoticDecibelsSlider).valueToText(me, v), " dB");
+ float i;
+ for(i = -400; i < 0; ++i)
+ {
+ float db = i * 0.1;
+ float v = fromDecibelOfSquare(db, -40);
+ float dbv = toDecibelOfSquare(v, -40);
+ float d = dbv - db;
+ print(sprintf("%f -> %f -> %f (diff: %f)\n", db, v, dbv, d));
+ TEST_Check(fabs(d) > 0.02);
+ }
+ TEST_OK();
}
#endif