X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fxonotic-data.pk3dir.git;a=blobdiff_plain;f=qcsrc%2Fmenu%2Fxonotic%2Fslider_decibels.c;h=0ea9d161f1e166f358ea53867522eab681ed136e;hp=729bec00693e28f1707c8c12868cfe90d1bbb974;hb=23ae96654035b8cda3da563f346b4507d04d73e8;hpb=7cf65fc959abac34d7791793d8d10e091416df2f

diff --git a/qcsrc/menu/xonotic/slider_decibels.c b/qcsrc/menu/xonotic/slider_decibels.c
index 729bec006..0ea9d161f 100644
--- a/qcsrc/menu/xonotic/slider_decibels.c
+++ b/qcsrc/menu/xonotic/slider_decibels.c
@@ -9,14 +9,32 @@ entity makeXonoticDecibelsSlider(float, float, float, string);
 
 #ifdef IMPLEMENTATION
 
-float toDecibelOfSquare(float f)
+float toDecibelOfSquare(float f, float mi)
 {
-	return 20.0 * log10(f);
+	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 fromDecibelOfSquare(float f, float mi)
 {
-	return pow(10, f / 20.0);
+	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)
@@ -36,12 +54,10 @@ void XonoticDecibelsSlider_loadCvars(entity me)
 	v = cvar(me.cvarName);
 
 	// snapping
-	if(v > fromDecibelOfSquare(me.valueMax - 0.5 * me.valueStep))
+	if(v > fromDecibelOfSquare(me.valueMax - 0.5 * me.valueStep, me.valueMin))
 		Slider_setValue(me, me.valueMax);
-	else if(v < fromDecibelOfSquare(me.valueMin - 0.5 * me.valueStep))
-		Slider_setValue(me, -1000000); // virtually infinite
 	else
-		Slider_setValue(me, me.valueStep * floor(0.5 + toDecibelOfSquare(v) / me.valueStep) );
+		Slider_setValue(me, me.valueStep * floor(0.5 + toDecibelOfSquare(v, me.valueMin) / me.valueStep) );
 }
 void XonoticDecibelsSlider_saveCvars(entity me)
 {
@@ -49,20 +65,41 @@ void XonoticDecibelsSlider_saveCvars(entity me)
 		return;
 
 	if(me.value > me.valueMax - 0.5 * me.valueStep)
-		cvar_set(me.cvarName, ftos(fromDecibelOfSquare(me.valueMax)));
-	else if(me.value < me.valueMin - 0.5 * me.valueStep)
-		cvar_set(me.cvarName, "0");
+		cvar_set(me.cvarName, ftos(fromDecibelOfSquare(me.valueMax, me.valueMin)));
 	else
-		cvar_set(me.cvarName, ftos(fromDecibelOfSquare(me.value)));
+		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 - 0.5 * me.valueStep)
+	else if(v <= me.valueMin)
 		return CTX(_("VOL^OFF"));
-	return sprintf(_("%s dB"), SUPER(XonoticDecibelsSlider).valueToText(me, v));
+	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));
+}
+
+void _TEST_XonoticDecibelsSlider()
+{
+	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