add vector clamp

math.d

@@ -6,6 +6,7 @@ import dlib.util;
 import dlibincludes;
 
 import core.stdc.math : tanf, cosf, sinf, sqrtf, fabsf;
+import std.algorithm.comparison : clamp;
 
 import std.math;
 import std.math.algebraic;
@@ -956,6 +957,20 @@ Remap(f32 v, f32 in_min, f32 in_max, f32 out_min, f32 out_max)
 	return Lerp(out_min, out_max, t);
 }
 
+template 
+IsVector(T)
+{
+	import std.traits : isInstanceOf;
+	enum bool IsVector = isInstanceOf!(Vector, T);
+}
+
+T
+Clamp(T)(T value, T low, T high) if(IsVector!(T))
+{
+	mixin(GenerateLoop!("value.v[@] = clamp(value.v[@], low.v[@], high.v[@]);", T.v.length));
+	return value;
+}
+
 version(DLIB_TEST) unittest
 {
 	enum FLOAT_MAX = f32.max;
@@ -1164,5 +1179,18 @@ version(DLIB_TEST) unittest
 		Transform(&vec, &mat, 1.0);
 
 		assert(vec == Vec3(18.0));
+
+		Vec4 low  = Vec4(-5.0);
+		Vec4 high = Vec4(+5.0);
+		Vec4 test = Vec4(-500.0);
+
+		test = Clamp(test, low, high);
+
+		assert(test == low);
+
+		test = Vec4(+500.0);
+		test = Clamp(test, low, high);
+
+		assert(test == high);
 	}
 }