//------------------------------------------------------------------------------------
#include "analytical_g.inc"
//------------------------------------------------------------------------------------
#declare A  = <-0.50, 0.30,-0.70>;
#declare B  = < 0.80, 0.70, 0.50>;
#declare C  = < 0.60, 0.10,-0.50>;
#declare D  = <-0.30, 0.90, 0.00>;
//------------------------------------------------------------------------------------
sphere{ A, 0.035 pigment{ color rgb<1,0.2,0> } no_shadow }
object{ Show_Yxz( A, 0.01) pigment{ color rgb<1,1,1>*0.7}  no_shadow }

sphere{ B, 0.035 pigment{ color rgb<1,0.2,0> } no_shadow }
object{ Show_Yxz( B, 0.01) pigment{ color rgb<1,1,1>*0.7}  no_shadow }

sphere{ C, 0.035 pigment{ color rgb<1,0.2,0> } no_shadow }
object{ Show_Yxz( C, 0.01) pigment{ color rgb<1,1,1>*0.7}  no_shadow }

sphere{ D, 0.035 pigment{ color rgb<1,0.2,0> } no_shadow }
object{ Show_Yxz( D, 0.01) pigment{ color rgb<1,1,1>*0.7}  no_shadow }

text { ttf "arial.ttf", "A",0.1,0 
       scale 0.15 rotate<20,-45,0> translate A+<-0.2,-0.1,-0.1> pigment{ color Red*0.7 } no_shadow}

text { ttf "arial.ttf", "B",0.1,0 
       scale 0.15 rotate<20,-45,0> translate B+< 0.0,0.1,-0.0> pigment{ color Red*0.7 } no_shadow }

text { ttf "arial.ttf", "C",0.1,0 
       scale 0.15 rotate<20,-45,0> translate C+<-0.0,0.2,-0.1> pigment{ color Red*0.7 } no_shadow }

text { ttf "arial.ttf", "D",0.1,0 
       scale 0.15 rotate<20,-45,0> translate D+<-0.0,0.1,-0.1> pigment{ color Red*0.7 } no_shadow }

//------------------------------------------------------------------------------------
// Tetrahedron 
// Tetrahedron by edge vectors V1,V2,V3: 
// object{ Tetrahedron_by_Edges ( V1,V2,V3, Rl,Rp, Filled) pigment{ color Green transmit 0.5}}
// object{ Tetrahedron_by_Edges ( A, B-A,C-A,D-A, 0.015, 0.025, 1) pigment{ color Green transmit 0.75}}
// Tetrahedron by corners P1P2P3P4: .... 
// object{ Tetrahedron_by_Corners ( P0,P1,P2,P3, Rl,Rp, Filled) pigment{ color Green transmit 0.5}}
object{ Tetrahedron_by_Corners ( A,B,C,D, 0.015, 0.025, 1) pigment{ color Green transmit 0.75}}
//------------------------------------------------------------------------------------