cones_cylindres.html

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Intersections de cones et cylindres

// Intersection de cones et cylindres de révolution
#include "colors.inc"
#include "glass.inc"

camera { orthographic location <5,2,-10> //
look_at <0,-0.5,0>}

light_source {<-5,12,-25> White*0.7 }
light_source {<6,8,-25> White*0.95 shadowless }

#declare eps=0.03;

//--------- cylindres -------------
#macro cyl_cyl(r1,r2,beta)

#declare baseext1=cylinder { <0,-2,0>,<0,2,0>,r1};
#declare baseint1=cylinder { <0,-2-0.0001,0>,<0,2+0.0001,0>,r1-eps};
#declare baseext2=cylinder { <-2,0,0>,<2,0,0>,r2 rotate z*beta};
#declare baseint2=cylinder { <-2-0.0001,0,0>,<2+0.0001,0,0>,r2-eps rotate z*beta};
#declare ext1=difference{
object{ baseext1}
object{ baseint1}
clipped_by {object { baseext2 inverse} }
};
#declare ext2=difference{
object{ baseext2}
object{ baseint2}
clipped_by {object { baseext1 inverse} }
};

#declare mil1= object { baseext1 clipped_by { baseext2} } ;
#declare mil2= object {baseext2 clipped_by { baseext1 } };

union{
union {
object { mil1
pigment { rgb <1,0.1,0.1>*1.3}
finish {ambient 0.1 reflection 0.3 specular 0.5 }
}
object { mil2
pigment { rgb <1,1,0>*1.2}
finish {ambient 0.1 reflection 0.3}
}
}

// partie transparente
union {
object {ext1}
object {ext2 }
texture { T_Glass3 }
interior { ior Crown_Glass_Ior}//ior Air_Ior }
finish { ambient 0.1 reflection 0.08 specular 0.2 }
}
rotate <0,0,0>
} // fin union
#end
//----------------- cônes-cylindres -------------------
#macro cone_cyl(Rcyl,beta,scaley,tx,ty,tz)
#declare coneext=union { cone {<0,-3,0>,1.5,<0,0,0>,0} }
// cone {<0,3,0>,1.5,<0,0,0>,0} }
#declare coneint=union { cone {<0,-3-0.0001,0>,1.5-eps,<0,-eps,0>,0} }
// cone {<0,4+0.0001,0>,2-eps,<0,eps,0>,0} }
#declare cylext=cylinder { <-2,0,0>,<2,0,0>,Rcyl rotate z*beta scale y*scaley translate };
#declare cylint=cylinder { <-2,0,0>,<2,0,0>,Rcyl-eps rotate z*beta scale y*scaley translate };

#declare ext1=difference{
object{ coneext}
object{ coneint}
clipped_by {object { cylext inverse} }
};
#declare ext2=difference{
object{ cylext}
object{ cylint}
clipped_by {object { coneext inverse} }
};

#declare mil1= object { coneext clipped_by { cylext} } ;
#declare mil2= object { cylext clipped_by { coneext } };

union{
union {
object { mil1
pigment { rgb <1,0.1,0.1>*1.3}
finish {ambient 0.1 reflection 0.3 specular 0.5 }
}
object { mil2
pigment { rgb <1,1,0>*1.2}
finish {ambient 0.1 reflection 0.3}
}
}

// partie transparente
union {
object {ext1}
object {ext2 }
texture { T_Glass3 }
interior { ior Crown_Glass_Ior}//ior Air_Ior }
finish { ambient 0.1 reflection 0.08 specular 0.2 }
}
rotate <0,0,0>
} // fin union
#end

//-------------- affichage --------------------

union {
object { cyl_cyl(1,0.95,-30) translate <-5,5.5,0> }
object { cyl_cyl(1,1,10) translate <0,5.5,0> }
object { cyl_cyl(0.95,1,-30) translate <5,5.5,0> }
/* */

object { cone_cyl(0.75,0,1,0,-1.677050983,0) translate <-5,+1,1>
// clipped_by { box{<-7,-4,-4>,<-3,5,4> }}
rotate <0,-20,0>
}
object { cone_cyl(0.75,90,1,0.75,-1,0) rotate y*20 translate <0,1,-1>
clipped_by { box{<-2,-4,-4>,<2,1.5,5> }}
}
object { cone_cyl(1,63.435,1,0.368,-1.5,0) translate <4.5,1,-2.6>
clipped_by { box{<3,-2,-4>,<8,6,4> }}
rotate <0,-20,0>
}
/* */

union {
plane { z , 2 pigment{ PaleGreen*1.2}}
box{<-10,-2.3,-3>,<10,-2.01,2> pigment{Copper*1.3 }}
box{<-10,3.2,-1.5>,<10,3.5,2> pigment{ Copper*1.5 }}
finish { ambient 0.2 diffuse 0.8 specular 0.8 }
}
translate -2.9*y
rotate <0,-26.566,0>

}

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