Initial commit

Torque/SDK/lib/dtsSDK/DTSInterpolation.h

@@ -0,0 +1,50 @@
+#ifndef __DTS_INTERPOLATION_H
+#define __DTS_INTERPOLATION_H
+
+#include <cmath>
+
+namespace DTS
+{
+   //! Not really a class, but a bunch of static interpolation functions
+   
+   struct Interpolation
+   {
+      template <class type>
+      static inline type linear (const type &a, const type &b, float s)
+      {
+         return s*a + (1-s)*b ;
+      }
+
+      template <class type>
+      static inline type quadratic (const type &a, const type &b, float s)
+      {
+         return sqrt( s*a*a + (1-s)*b*b );
+      }
+
+      template <class type>
+      static inline type spherical (const type &a, const type &b, float s)
+      {
+         return exp( s*ln(a) + (1-s)*ln(b) );
+      }
+
+      template <class type>
+      static inline type bezier (const type &a, const type &b, const type &ac, const type &bc, float s)
+      {
+         return (-1*s*s*s +3*s*s -3*s +1) * a
+	      + (+3*s*s*s -6*s*s +3*s   ) * b
+	      + (-3*s*s*s +3*s*s        ) * ac
+	      + (+1*s*s*s               ) * bc ;
+      }
+
+      template <class type>
+      static inline type hermite (const type &a, const type &b, const type &at, const type &bt, float s)
+      {
+         return (+2*s*s*s -3*s*s    +1) * a
+	      + (-2*s*s*s +3*s*s      ) * b
+	      + (+1*s*s*s -2*s*s +s   ) * at
+	      + (+1*s*s*s -1*s*s      ) * bt ;
+      }
+   };
+}
+
+#endif