raylib basic folders structure and some files... ;)

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+/*********************************************************************************************
+*
+*	raylib.vector3
+*
+*	Vector3 Functions Definition
+*
+*	Copyright (c) 2013 Ramon Santamaria (Ray San - raysan@raysanweb.com)
+*	
+*	This software is provided "as-is", without any express or implied warranty. In no event 
+*	will the authors be held liable for any damages arising from the use of this software.
+*
+*	Permission is granted to anyone to use this software for any purpose, including commercial 
+*	applications, and to alter it and redistribute it freely, subject to the following restrictions:
+*
+*	  1. The origin of this software must not be misrepresented; you must not claim that you 
+*	  wrote the original software. If you use this software in a product, an acknowledgment 
+*	  in the product documentation would be appreciated but is not required.
+*
+*	  2. Altered source versions must be plainly marked as such, and must not be misrepresented
+*	  as being the original software.
+*
+*	  3. This notice may not be removed or altered from any source distribution.
+*
+**********************************************************************************************/
+
+#include "vector3.h"
+
+#include <math.h>
+
+// Add two vectors
+Vector3 VectorAdd(Vector3 v1, Vector3 v2)
+{
+	Vector3 out;
+
+	out.x = v1.x + v2.x;
+	out.y = v1.y + v2.y;
+	out.z = v1.z + v2.z;
+	
+	return out;
+}
+
+// Substract two vectors
+Vector3 VectorSubtract(Vector3 v1, Vector3 v2)
+{
+	Vector3 out;
+
+	out.x = v1.x - v2.x;
+	out.y = v1.y - v2.y;
+	out.z = v1.z - v2.z;
+	
+	return out;
+}
+
+// Calculate two vectors cross product
+Vector3 VectorCrossProduct(Vector3 v1, Vector3 v2)
+{
+	Vector3 cross;
+
+	cross.x = v1.y*v2.z - v1.z*v2.y;
+	cross.y = v1.z*v2.x - v1.x*v2.z;
+	cross.z = v1.x*v2.y - v1.y*v2.x;
+	
+	return cross;
+}
+
+// Calculate one vector perpendicular vector
+Vector3 VectorPerpendicular(Vector3 v) 
+{
+	Vector3 out;
+	
+    float min = fabs(v.x);
+    Vector3 cardinalAxis = {1.0, 0.0, 0.0};
+ 
+    if (fabs(v.y) < min) 
+	{
+        min = fabs(v.y);
+        cardinalAxis = (Vector3){0.0, 1.0, 0.0};
+    }
+ 
+    if(fabs(v.z) < min) 
+	{
+        cardinalAxis = (Vector3){0.0, 0.0, 1.0};
+    }
+	
+	out = VectorCrossProduct(v, cardinalAxis);
+ 
+    return out;
+}
+
+// Calculate two vectors dot product
+float VectorDotProduct(Vector3 v1, Vector3 v2)
+{
+	float dot;
+	
+	dot = v1.x*v2.x + v1.y*v2.y + v1.z*v2.z;
+	
+	return dot;
+}
+
+// Calculate vector lenght
+float VectorLength(const Vector3 v)
+{
+	float length;
+	
+	length = sqrt(v.x*v.x + v.y*v.y + v.z*v.z);
+	
+	return length;
+}
+
+// Scale provided vector
+void VectorScale(Vector3 *v, float scale)
+{
+	v->x *= scale;
+	v->y *= scale;
+	v->z *= scale;
+}
+
+// Invert provided vector (direction)
+void VectorInverse(Vector3 *v)
+{
+	v->x = -v->x;
+	v->y = -v->y;
+	v->z = -v->z;
+}
+
+// Normalize provided vector
+void VectorNormalize(Vector3 *v)
+{
+	float length, ilength;
+
+	length = VectorLength(*v);
+	
+	if (length == 0) length = 1;
+
+	ilength = 1.0/length;
+	
+	v->x *= ilength;
+	v->y *= ilength;
+	v->z *= ilength;
+}