Added some more useful math functions

src/linalg/mat.h

@@ -7,4 +7,11 @@ __device__ Vec3 computeGradient(float* volumeData, const int volW, const int vol
 
 __device__ unsigned int packUnorm4x8(float r, float g, float b, float a);
 
+__device__ float clamp(float value, float min, float max);
+__device__ float normalize(float value, float min, float max);
+
+template <typename T>
+__device__ float interpolate(T start, T end, float t);
+
+
 #endif // MAT_H