typedef struct {
GLfloat amb[4];
GLfloat dif[4];
GLfloat spe[4];
GLfloat shi;
} RS_material;
typedef struct {
GLfloat amb[4];
GLfloat dif[4];
GLfloat spe[4];
GLfloat pos[4];
} RS_light;
RS_material silver;
RS_light luz0;
silver.amb={0.19225,0.19225,0.19225,1.0};
silver.dif={0.50754,0.50754,0.50754,1.0};
silver.spe={0.508273,0.508273,0.508273,1.0};
silver.shi=0.4;
luz0.pos={1.0,1.0,1.0};
luz0.amb={0.0,0.0,0.0,1.0};
luz0.spe={1.0,1.0,1.0,1.0};
luz0.dif={1.0,1.0,1.0,1.0};