Reorganise item code so that VM-specific code is in its correct directories and not...

[xonotic/xonotic-data.pk3dir.git] / qcsrc / lib / math.qh

diff --git a/qcsrc/lib/math.qh b/qcsrc/lib/math.qh
index f20b1c66e5bf120be7748737dabe8b9e8dec9f88..ac23325000995f50ef2e1fdde945686ff741401f 100644 (file)
--- a/qcsrc/lib/math.qh
+++ b/qcsrc/lib/math.qh
@@ -71,6 +71,39 @@ vector vsnap(vector point, float fsize)
        return vret;
 }
 
+ERASEABLE
+float lerpratio(float f0, float f1, float ratio)
+{
+       return f0 * (1 - ratio) + f1 * ratio;
+}
+
+ERASEABLE
+float lerp(float t0, float f0, float t1, float f1, float t)
+{
+       return lerpratio(f0, f1, (t - t0) / (t1 - t0));
+}
+
+ERASEABLE
+float lerp3ratio(float f0, float f1, float f2, float ratio)
+{
+       float mid = 0.5;
+       return ratio < mid ? lerpratio(f0, f1, ratio / mid) : ratio > mid ? lerpratio(f1, f2, (ratio - mid) / mid) : f1;
+}
+
+
+ERASEABLE
+vector lerpvratio(vector f0, vector f1, float ratio)
+{
+       return f0 * (1 - ratio) + f1 * ratio;
+}
+
+ERASEABLE
+vector lerpv3ratio(vector f0, vector f1, vector f2, float ratio)
+{
+       float mid = 0.5;
+       return ratio < mid ? lerpvratio(f0, f1, ratio / mid) : ratio > mid ? lerpvratio(f1, f2, (ratio - mid) / mid) : f1;
+}
+
 ERASEABLE
 vector lerpv(float t0, vector v0, float t1, vector v1, float t)
 {
@@ -324,9 +357,9 @@ vector solve_quadratic(float a, float b, float c)
 }
 
 /// Maps values between the src and dest range: src_min to dest_min, src_max to dest_max, values between them
-/// to the curresponding values between and extrapolates for values outside the range.
+/// to the corresponding values between and extrapolates for values outside the range.
 ///
-/// src_min and src_max must not be the same or division by zero accurs.
+/// src_min and src_max must not be the same or division by zero occurs.
 ///
 /// dest_max can be smaller than dest_min if you want the resulting range to be inverted, all values can be negative.
 ERASEABLE