File talk:CRT color.png
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POV-ray source code for Image:CRT color.png
/* ================================================ Cathode Ray Tube with cut-away for a peek inside ------------------------------------------------ Created by Søren Peo Pedersen - see my user page at http://da.wikipedia.org/wiki/Bruger:Peo ================================================ */ #include "functions.inc" global_settings { max_trace_level 256 max_intersections 128 } #declare ColorCRT = yes; // Use yes for color CRT, no for monochrome #declare Scope = no; // Use yes for oscilloscope-type CRT, no for television-type CRT // Oscilloscope-type MUST use ColorCRT = no #declare SeeScreen = yes; // Use yes for a close-up on the inside of the screen, no for general view #declare Copper=texture { // Copper texture for coils pigment {color rgb<.5,.3,.2>} finish { phong yes phong_size 150 reflection rgb<.5,.3,.2> metallic ambient .5 } } #declare Iron=texture { // Iron texture for coil yoke pigment {color rgb .2} finish { ambient .5 reflection .3 phong 1 } } #declare ElectrodeMetal=texture { // Metal texture for electron gun and other components pigment {color rgb .3} finish { ambient .5 reflection .8 phong 1 phong_size 120 } } #declare ScreenMetal=texture { // Metal texture for the metal raster mask behind screen pigment {color rgbt <.3,.3,.3,.2>} finish { ambient .5 reflection .8 phong 1 phong_size 120 } } #declare ConnectorPinMetal=merge { // Metal texture used on connector pins at rear cylinder {<-6,.5,0>,<-5.6,.5,0>,.07} sphere {<-6,.5,0>,.07} texture {ElectrodeMetal} } #declare EntireTube = difference { // Shape of the entire CRT body, without cut-away merge { // OUTSIDE SHAPE: difference { // The spherical front sphere {0,10} plane {<0,-1, 0>,0 rotate <0, 0, 20>} plane {<0, 1, 0>,0 rotate <0, 0,-20>} plane {<0, 0, 1>,0 rotate <0, 25, 0>} plane {<0, 0,-1>,0 rotate <0,-25, 0>} } difference { // Rounded top edge of the front torus {9.5,.5 rotate <0,0,20>} plane {<0, 0, 1>,0 rotate <0, 25, 0>} plane {<0, 0,-1>,0 rotate <0,-25, 0>} } difference { // Rounded bottom edge of the front torus {9.5,.5 rotate <0,0,-20>} plane {<0, 0, 1>,0 rotate <0, 25, 0>} plane {<0, 0,-1>,0 rotate <0,-25, 0>} } difference { // Rounded right-hand edge of the front torus {9.5,.5 rotate <90,-25,0>} plane {<0,-1, 0>,0 rotate <0, 0, 20>} plane {<0, 1, 0>,0 rotate <0, 0,-20>} } difference { // Rounded left-hand edge of the front torus {9.5,.5 rotate <90, 25,0>} plane {<0,-1, 0>,0 rotate <0, 0, 20>} plane {<0, 1, 0>,0 rotate <0, 0,-20>} } // Spherically rounded corners of the front sphere {<8.176549037, 2.976020469,-3.812787433>,.5} sphere {<8.176549037, 2.976020469, 3.812787433>,.5} sphere {<8.176549037,-2.976020469,-3.812787433>,.5} sphere {<8.176549037,-2.976020469, 3.812787433>,.5} // Rounded edges between the four "sides" of the "funnel" part of the CRT cylinder {0,<8.176549037, 2.976020469,-3.812787433>,.5} cylinder {0,<8.176549037, 2.976020469, 3.812787433>,.5} cylinder {0,<8.176549037,-2.976020469,-3.812787433>,.5} cylinder {0,<8.176549037,-2.976020469, 3.812787433>,.5} difference { // Top and bottom sides of the "funnel" sphere {0,9.5} plane {<0,-1,0>,-.5 rotate <0,0,20>} plane {<0, 1,0>,-.5 rotate <0,0,-20>} plane {<0,0, 1>,0 rotate <0, 25,0>} plane {<0,0,-1>,0 rotate <0,-25,0>} } difference { // Left- and right-hand sides of the "funnel" sphere {0,9.5} plane {<0,0, 1>,-.5 rotate <0, 25,0>} plane {<0,0,-1>,-.5 rotate <0,-25,0>} plane {<0,-1,0>,0 rotate <0,0, 20>} plane {<0, 1,0>,0 rotate <0,0,-20>} } cylinder {<-4.5,0,0>,<5,0,0>,1.5} // Cylindrical "neck" of the CRT #if (Scope) // If it is to be the "oscilloscope-type" CRT...: sphere {<.5,1.4,0>,.3} // Create spherical "nodes" where sphere {<.5,-1.4,0>,.3} // the voltage deflection electrodes sphere {<.5,0,1.4>,.3} // enter the CRT sphere {<.5,0,-1.4>,.3} #end torus {1,.5 rotate <0,0,90> translate <-4.5,0,0>} cylinder {<-4.5,0,0>,<-5,0,0>,1} } // SHAPE OF INSIDE CAVITY: difference { // The spherical front sphere {0,9.3} plane {<0,-1, 0>,0 rotate <0, 0, 20>} plane {<0, 1, 0>,0 rotate <0, 0,-20>} plane {<0, 0, 1>,0 rotate <0, 25, 0>} plane {<0, 0,-1>,0 rotate <0,-25, 0>} } difference { // Rounded top edge of the front torus {9,.3 rotate <0,0,20>} plane {<0, 0, 1>,0 rotate <0, 25, 0>} plane {<0, 0,-1>,0 rotate <0,-25, 0>} } difference { // Rounded bottom edge of the front torus {9,.3 rotate <0,0,-20>} plane {<0, 0, 1>,0 rotate <0, 25, 0>} plane {<0, 0,-1>,0 rotate <0,-25, 0>} } difference { // Rounded right-hand edge of the front torus {9,.3 rotate <90,-25,0>} plane {<0,-1, 0>,0 rotate <0, 0, 20>} plane {<0, 1, 0>,0 rotate <0, 0,-20>} } difference { // Rounded left-hand edge of the front torus {9,.3 rotate <90, 25,0>} plane {<0,-1, 0>,0 rotate <0, 0, 20>} plane {<0, 1, 0>,0 rotate <0, 0,-20>} } // Spherically rounded corners of the front sphere {<7.746204351, 2.819387812,-3.612114411>,.3} sphere {<7.746204351, 2.819387812, 3.612114411>,.3} sphere {<7.746204351,-2.819387812,-3.612114411>,.3} sphere {<7.746204351,-2.819387812, 3.612114411>,.3} // Rounded edges between the four "sides" of the "funnel" part of the CRT cylinder {0,<7.746204351, 2.819387812,-3.612114411>,.3} cylinder {0,<7.746204351, 2.819387812, 3.612114411>,.3} cylinder {0,<7.746204351,-2.819387812,-3.612114411>,.3} cylinder {0,<7.746204351,-2.819387812, 3.612114411>,.3} difference { // Top and bottom sides of the "funnel" sphere {0,9} plane {<0,-1,0>,-.3 rotate <0,0,20>} plane {<0, 1,0>,-.3 rotate <0,0,-20>} plane {<0,0, 1>,0 rotate <0, 25,0>} plane {<0,0,-1>,0 rotate <0,-25,0>} } difference { // Left- and right-hand sides of the "funnel" sphere {0,9} plane {<0,0, 1>,-.3 rotate <0, 25,0>} plane {<0,0,-1>,-.3 rotate <0,-25,0>} plane {<0,-1,0>,0 rotate <0,0, 20>} plane {<0, 1,0>,0 rotate <0,0,-20>} } #if (Scope) difference { #end cylinder {<-4.5,0,0>,<6,0,0>,1.3} #if (Scope) // If it is to be the "oscilloscope-type" CRT...: sphere {<.5,1.4,0>,.3} // Create spherical "nodes" where sphere {<.5,-1.4,0>,.3} // the voltage deflection electrodes sphere {<.5,0,1.4>,.3} // enter the CRT sphere {<.5,0,-1.4>,.3} } #end torus {1,.3 rotate <0,0,90> translate <-4.5,0,0>} cylinder {<-4,0,0>,<-4.8,0,0>,1} cylinder {<-1,0,0>,<-8,0,0>,.7} } #macro PhosporLevel(Level) // Phosphor texture "glowing" at the given "Level" #if (ColorCRT) pigment { // Hexagonal red-green-blue pattern for use in color CRT hexagon rgb<1,0,0> rgb<0,1,0> rgb<0,0,1> rotate <0,0,90> translate <0,-.4,0> scale .003333 } finish {ambient .8*Level+.2 diffuse (1-Level)*.6} #else pigment {color rgb< // Monochrome (pale bluish for scope, warm "white" for black/white TV) #if (Scope) .4+Level*.4,.5+Level*.5,.6+Level*.2 #else .9+Level*.1,.85+Level*.15,.75+Level*.25 #end >} finish {ambient .5+Level/2 diffuse (1-Level)*.6} #end #end #local PhosporStripes=texture { // Phosphor with some pattern on it #if (Scope) // For oscilloscope-type CRT; a sine-wave curve: function {pow(600,-abs(y+1.75*cos(4*z)))*pow(1.2,z)} texture_map { [0 PhosporLevel(0)] [1 PhosporLevel(1)] } } #else // For TV-type CRTs: "Stripes" resembling the raster scan pattern used in a TV: radial texture_map { [0.00 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.03 PhosporLevel(.1073741824) rotate <0,0,-21.5> rotate <90,0,0>] [0.06 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.09 PhosporLevel(.134217728) rotate <0,0,-21.5> rotate <90,0,0>] [0.12 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.15 PhosporLevel(.16777216) rotate <0,0,-21.5> rotate <90,0,0>] [0.18 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.21 PhosporLevel(.2097152) rotate <0,0,-21.5> rotate <90,0,0>] [0.24 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.27 PhosporLevel(.262144) rotate <0,0,-21.5> rotate <90,0,0>] [0.30 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.33 PhosporLevel(.32768) rotate <0,0,-21.5> rotate <90,0,0>] [0.36 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.39 PhosporLevel(.4096) rotate <0,0,-21.5> rotate <90,0,0>] [0.42 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.45 PhosporLevel(.512) rotate <0,0,-21.5> rotate <90,0,0>] [0.48 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.51 PhosporLevel(0.64) rotate <0,0,-21.5> rotate <90,0,0>] [0.54 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.57 PhosporLevel(0.8) rotate <0,0,-21.5> rotate <90,0,0>] [0.60 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [0.63 PhosporLevel(1) rotate <0,0,-21.5> rotate <90,0,0>] [0.66 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] [1.00 PhosporLevel(0) rotate <0,0,-21.5> rotate <90,0,0>] } frequency 7 scale 5 rotate <-90,0,21.5> } #end #local PhosporTexture=texture { // Texture for the entire CRT; partly glass, partly phospor pattern object { difference { sphere {0,9.35} plane {<0,-1, 0>,-.301 rotate <0, 0, 20>} plane {<0, 1, 0>,-.301 rotate <0, 0,-20>} plane {<0, 0, 1>,-.301 rotate <0, 25, 0>} plane {<0, 0,-1>,-.301 rotate <0,-25, 0>} } texture {pigment {color rgbf <.65,.75,.7,.9>} finish {ambient .5}} texture { object { box {<0,-10,0>,<20, #if (Scope) 10 #else .27 #end ,10> rotate <0,0,-11>} texture {PhosporStripes} texture { cylindrical texture_map { [0 PhosporLevel(0) scale .5 rotate <0,0,-79>] [.975 PhosporLevel(0) scale .5 rotate <0,0,-79>] [1 PhosporLevel(1) scale .5 rotate <0,0,-79>] } scale 10 rotate <0,0,79> } } } } } #macro DeflCoilWinding(Radius,Level) // One winding of a deflection coil at given radius and level #local Qtorus=intersection { torus {Radius,.05} box {<0,-1,0>,<10,1,10>} } merge { #object {Qtorus translate < .7,1.55+Level,0> rotate < 25,0,0>} #object {Qtorus scale <-1,1, 1> translate <-.7,1.55+Level,0> rotate < 25,0,0>} #object {Qtorus scale < 1,1,-1> translate < .7,1.55+Level,0> rotate <-25,0,0>} #object {Qtorus scale <-1,1,-1> translate <-.7,1.55+Level,0> rotate <-25,0,0>} cylinder {<-.7,1.55+Level, Radius>,<.7,1.55+Level, Radius>,.05 rotate < 25,0,0>} cylinder {<-.7,1.55+Level,-Radius>,<.7,1.55+Level,-Radius>,.05 rotate <-25,0,0>} difference { merge { torus {1.55+Level,.05 rotate <0,0,90> translate <-.7-Radius,0,0>} torus {1.55+Level,.05 rotate <0,0,90> translate < .7+Radius,0,0>} } plane {<0,1,0>,0 rotate < 65,0,0>} plane {<0,1,0>,0 rotate <-65,0,0>} } } #end #declare DeflCoil=merge { // One of four deflection coils #object {DeflCoilWinding(.1,0)} #object {DeflCoilWinding(.2,0)} #object {DeflCoilWinding(.3,0)} #object {DeflCoilWinding(.4,0)} #object {DeflCoilWinding(.4,.1)} #object {DeflCoilWinding(.4,.2)} #object {DeflCoilWinding(.4,.3)} #object {DeflCoilWinding(.3,.3)} #object {DeflCoilWinding(.2,.3)} #object {DeflCoilWinding(.1,.3)} #object {DeflCoilWinding(.1,.2)} #object {DeflCoilWinding(.1,.1)} translate <.5,0,0> texture {Copper} } difference { // The CRT body with its textures applied #object {EntireTube texture { object { merge { difference { sphere {0,9} plane {<0,-1, 0>,-.301 rotate <0, 0, 20>} plane {<0, 1, 0>,-.301 rotate <0, 0,-20>} plane {<0, 0, 1>,-.301 rotate <0, 25, 0>} plane {<0, 0,-1>,-.301 rotate <0,-25, 0>} } difference { cylinder {<-3,0,0>,<4,0,0>,1.4} cylinder {<-4,0,0>,<5,0,0>,1.299} } } texture {PhosporTexture} texture {pigment {color rgb .4} finish {ambient .5}} } } interior {ior 1.5} } box {<-10,0,-10>,<7.5,10,0> pigment {color rgb <1,0,0>} finish {ambient .7} } } #declare DeflElectrode=merge { // Oscilloscope-type deflection electrode box {<-.5,.95,-.5>,<.5,1.05,.5>} cylinder {<0,1,0>,<0,3,0>,.05} texture {ElectrodeMetal} translate <.5,0,0> } #if (SeeScreen=no) // If not rendering close-up of the screen itself...: #if (Scope) // For the oscilloscope-type CRT...: #object {DeflElectrode} // Use four of the above- #object {DeflElectrode rotate <90,0,0>} // declared voltage #object {DeflElectrode rotate <180,0,0>} // deflection electrodes #object {DeflElectrode rotate <270,0,0>} #else // For the TV-type CRT...: #object {DeflCoil} // Use four of the above- #object {DeflCoil rotate <90,0,0>} // declared deflection #object {DeflCoil rotate <180,0,0>} // coil assemblies #object {DeflCoil rotate <270,0,0>} #end difference { // Yoke for focusing coil merge { difference { cylinder {<-1.4,0,0>,<-1.2,0,0>,3} cylinder {0,<-5,0,0>,1.6} } difference { cylinder {<-1.6,0,0>,<-2.0,0,0>,1.8} cylinder {0,<-5,0,0>,1.6} } difference { cylinder {<-2.2,0,0>,<-2.0,0,0>,3} cylinder {0,<-5,0,0>,1.6} } difference { cylinder {<-1.4,0,0>,<-2.0,0,0>,3} cylinder {0,<-5,0,0>,2.8} } texture {Iron} } box {<-5,0,-10>,<0,10,0> pigment {color rgb <1,0,0>} finish {ambient .5} } } difference { // Windings on the focusing coil merge { #local Layer=1.85; #while (Layer<2.8) #local Winding=-1.95; #while (Winding<-1.4) torus {Layer,0.05 rotate <0,0,90> translate <Winding,0,0>} #local Winding=Winding+.1; #end #local Layer=Layer+.1; #end texture {Copper} } intersection { box {<-5,-5,-5>,<0,0,0> rotate <60,0,0>} box {<-5,0,0>,<0,5,5> rotate <-90,0,0>} pigment {color rgb <1,0,0>} finish {ambient .5} } } // ELECTRON GUN union { difference { // Hollow cathode merge { difference { cylinder {<-4.5,0,0>,<-3.55,0,0>,.3} cylinder {<-5,0,0>,0,.2} } torus {.25,.05 rotate <0,0,90> translate <-3.55,0,0>} cylinder {<-3.6,0,0>,<-3.5,0,0>,.25} texture {ElectrodeMetal} } box {<-10,0,-10>,<0,10,0> pigment {color rgb <1,0,0>} finish {ambient .5} } } isosurface { // Heating filament inside hollow cathode function {f_helix1(y,x,z,1,60,0.02,.15,1,1,0)} contained_by {box {-.5, .5}} accuracy 0.001 max_gradient 4 pigment { gradient x color_map { [0.0 color rgb <.8,.3,0>] [0.3 color rgb <1,.7,0>] [0.3 color rgb <1,.9,.2>] [0.7 color rgb <1,.7,0>] [1.0 color rgb <.8,.3,0>] } translate <-.4,0,0> } finish {ambient 1 diffuse 0} translate <-4.1,0,0> } difference { // Controling electrode with cut-away and "full interior" merge { difference { cylinder {<-4.5,0,0>,<-3.25,0,0>,.5} cylinder {<-5,0,0>,<-2,0,0>,.4} } torus {.45,.05 rotate <0,0,90> translate <-3.25,0,0>} difference { cylinder {<-3.3,0,0>,<-3.2,0,0>,.45} cylinder {<-4,0,0>,<-3,0,0>,.1} } texture {ElectrodeMetal} } plane {<0,-1,0>,0 rotate <-45,0,0> pigment {color rgb <1,0,0>} finish {ambient .5} } } #if (ColorCRT) // If rendering a color CRT...: translate <0,0.5*.6,-.866025>*.6 // Shift it off-center #end } #if (ColorCRT) // If rendering a color CRT...: #local EkstraKanon=merge { // Declare an electron gun not cut open cylinder {<-4.5,0,0>,<-3.25,0,0>,.5} torus {.45,.05 rotate <0,0,90> translate <-3.25,0,0>} texture {ElectrodeMetal} } #object {EkstraKanon translate <0,0.5*.6,.866025*.6>} // Place two of those in addition #object {EkstraKanon translate <0,-.6,0>} // to the cut-open one above #end merge { // Rubber gasket where the anode voltage wire enters CRT difference { cylinder {<5,.5,0>,<5,1,0>,1.2} torus {1.2,.8 scale <1,.5,1> translate <5,1,0>} } cylinder {<5,1,0>,<5,1.3,0>,.4} torus {.3,.1 translate <5,1.3,0>} cylinder {<5,1.3,0>,<5,1.4,0>,.3} pigment {color rgb .2} finish {ambient .5} rotate <0,0,20> } sphere_sweep { // Anode voltage wire cubic_spline 5 <5,1.15,-1>,.15 <5,1.15, 0>,.15 <5,0 , 4>,.15 <5,-5 , 6>,.15 <5,-7 , 8>,.15 pigment {color rgb<.8,.3,.4>} finish {ambient .5} rotate <0,0,20> } #end #macro Ebeam(OffsetX,OffsetY) // Shape of an electron beam with given X and Y offsets sphere_sweep { linear_spline 6 <-3.75,OffsetY,OffsetX>,.4 <-3.25,OffsetY*.95,OffsetX*.95>,.08 <-1.70,OffsetY*.85,OffsetX*.85>,.5 < 0.50,OffsetY*.65,OffsetX*.65>,.3 < 8.8346,-1.7173,0>,.005 < 9.1291,-1.7745-.03*OffsetY,-.03*OffsetX>,.015 } #end #if (ColorCRT) // If rendering a color CRT...: // Place three electron beams: #object {Ebeam(-.519615242,.3) // Blue beam pigment {color rgbf <.7,.7,1,.7>} finish {ambient 1 diffuse 0} } #object {Ebeam( .519615242,.3) // Green beam pigment {color rgbf <.7,1,.7,.7>} finish {ambient 1 diffuse 0} } #object {Ebeam(0,-.6) // Red beam pigment {color rgbf <1,.7,.7,.7>} finish {ambient 1 diffuse 0} } #difference { // Mask just behind the phospor coated screen difference { sphere {0,9.01} sphere {0,8.99} plane {<0,1,0>,0 rotate <0,0,-20>} plane {<0,-1,0>,0 rotate <0,0,20>} plane {<0,0,1>,0 rotate <0,25,0>} plane {<0,0,-1>,0 rotate <0,-25,0>} #if (SeeScreen) // If rendering close-up of screen: // Make holes in the mask: #local Ccnt=-2; #while (Ccnt<4) #local Rcnt=-38; #while (Rcnt<-32) cylinder {0,<12,0,0>,.01 rotate <0,6*Ccnt*.8660254037845/10,(Rcnt+.33333)*3/10>} cylinder {0,<12,0,0>,.01 rotate <0,6*(Ccnt+.5)*.8660254037845/10,(Rcnt-.16667)*3/10>} #local Rcnt=Rcnt+1; #end #local Ccnt=Ccnt+1; #end texture {ElectrodeMetal} #else texture {ScreenMetal} #end } box {<-15,0,-15>,<15,15,0> rotate <0,0,-11> pigment {color rgb <1,0,0>} finish {ambient .7} } } #else // If rendering a monochrome or oscilloscope-type CRT...: #object {Ebeam(0,0) // Place a single electron beam pigment {color rgbf <.8,.9,1,.6>} finish {ambient 1 diffuse 0} } #end merge { // Connector at the rear end of the CRT difference { cylinder {<-5.4,0,0>,<-5.3,0,0>,.8} torus {.8,.1 rotate <0,0,90> translate <-5.4,0,0>} } cylinder {<-5.4,0,0>,<-5.5,0,0>,.7} torus {.6,.1 rotate <0,0,90> translate <-5.5,0,0>} difference { cylinder {<-5.4,0,0>,<-5.6,0,0>,.6} cylinder {<-6,0,0>,<-5,0,0>,.4} } torus {.4,.1 rotate <0,0,90> translate <-5.5,0,0>} cone {<-5.3,0,0>,.8,<-5.2,0,0>,1} cylinder {<-5.2,0,0>,<-5,0,0>,1} cylinder {<-5,0,0>,<-4.8,0,0>,.7} cylinder {<-4.8,0,0>,<-4.5,0,0>,1} pigment {color rgb <0,.5,1>} finish {ambient .5} } #object {ConnectorPinMetal rotate < 0,0,0>} #object {ConnectorPinMetal rotate < 60,0,0>} #object {ConnectorPinMetal rotate <120,0,0>} #object {ConnectorPinMetal rotate <180,0,0>} #object {ConnectorPinMetal rotate <240,0,0>} #object {ConnectorPinMetal rotate <300,0,0>} #if (SeeScreen) // Cameraposition for: camera {location <-7,7,-7> look_at <9,-1.74,0> angle 1} // Close-up of screen and mask #else camera {location <-7,7,-7> look_at <1.05,.05,0> angle 62} // General overview #end // Surroundings: Completely white in the direction the camera "looks", but // with a "spotty" pattern elsewhere to enhance reflective surfaces #local SpottyPattern=pigment { granite color_map { [0 color rgb 0] [1 color rgb 1] } } sky_sphere { pigment { gradient y pigment_map { [0.00 color rgb <1,1,1>] [0.12 color rgb <1,1,1>] [0.15 SpottyPattern] [1.00 SpottyPattern] } translate -.5 scale 2 rotate <-56,51,0> } } // Light sources light_source {< 200,100,-100> color rgb 1} light_source {<-200,200, 100> color rgb 1} light_source {< 200,100, 200> color rgb 1}
