From f0f340dec7821cee103ab9267ef941a917ef4dc4 Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Sun, 18 Nov 2018 23:31:17 +0800
Subject: =?UTF-8?q?*=E7=9B=AE=E5=BD=95=E6=94=B9=E4=B8=BA=E5=B0=8F=E5=86=99?=
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---
 src/libjin/math/je_math.h | 83 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 src/libjin/math/je_math.h

(limited to 'src/libjin/math/je_math.h')

diff --git a/src/libjin/math/je_math.h b/src/libjin/math/je_math.h
new file mode 100644
index 0000000..de57e36
--- /dev/null
+++ b/src/libjin/math/je_math.h
@@ -0,0 +1,83 @@
+#ifndef __JE_UTILS_MATH_H__
+#define __JE_UTILS_MATH_H__
+
+#include "je_constant.h"
+#include "je_matrix.h"
+#include "je_quad.h"
+
+namespace JinEngine
+{
+	namespace Math
+	{
+
+	#ifdef min
+	    #undef min 
+	#endif // min
+	#ifdef max
+	    #undef max
+	#endif // max
+
+		template<typename T>
+		inline T min(T a, T b)
+		{
+			return a < b ? a : b;
+		}
+
+		template<typename T>
+		inline T max(T a, T b)
+		{
+			return a > b ? a : b;
+		}
+
+		template<typename T>
+		inline T clamp(T a, T mi, T ma)
+		{
+			return min<T>(max<T>(a, mi), ma);
+		}
+
+		template<typename T>
+		inline bool within(T a, T mi, T ma)
+		{
+			return a >= mi && a <= ma;
+		}
+
+		template<typename T>
+		inline bool without(T a, T mi, T ma)
+		{
+			return a < mi || a > ma;
+		}
+
+		template<typename T>
+		inline T abs(T a)
+		{
+			return a > 0 ? a : -a;
+		}
+
+		template<typename T>
+		inline T lowerBound(T a, T lower)
+		{
+			return a < lower ? lower : a;
+		}
+
+		template<typename T>
+		inline T upperBound(T a, T upper)
+		{
+			return a > upper ? upper : a;
+		}
+    
+		template<typename T>
+		inline T lerp(T a, T b, float t)
+		{
+			return a + t * (b - a);
+		}
+
+        inline float lerp(float a, float b, float f)
+        {
+            f = clamp<float>(f, 0, 1);
+            return a + f * (b - a);
+        }
+
+	} // namespace Math
+} // namespace JinEngine
+
+#endif // __JE_UTILS_MATH_H__
-- 
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