updated makefile for supporting different target architectures

use "ARCH=arch_name make"

restructured project folder, implementations and headers together under sources/

sources/GL_STUFF/SCENE/Model3D.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <glm/glm.hpp>
+
+#include <GLES2/gl2.h>
+
+#include <vector>
+
+using namespace std;   //for vector
+using namespace glm;   //vec3 and friends
+
+class Model3D {
+
+private:
+    int nVertices;
+    GLuint vao;
+    vec3 boundingBoxLBN;
+    vec3 boundingBoxRTF;
+    vector<vec3> loadVertexData(const char* modelPath, bool smoothNormals);
+    void computeBoundingBox(vector<vec3> points);
+    
+public:
+    Model3D(const char* modelPath, bool smoothNormals);
+    GLuint getVAO();
+    int getTrisCount();
+    void draw();
+    vec3 getLBN();
+    vec3 getRTF();
+};