#ifndef _MATERIAL_#define _MATERIAL_#include "common.h"//@@@@@@@@@@@@@@@@@ Material class @@@@@@@@@@@@@@class Material{public:    Material() { setDefault(); }        Color3 ambient, diffuse, specular, emissive;    int numParams; // for textures    float params[10]; // for textures    int textureType;  // 0 for none, neg for solids, pos for images    float reflectivity, transparency, speedOfLight;    float specularFraction, specularExponent, surfaceRoughness;    float nudgeValue;    void setDefault();    void set(Material m);};#endif