Multi-walled_Carbon_Nanotube.png
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Summary
Description Multi-walled Carbon Nanotube.png |
English:
A multi-walled armchair carbon nanotube, rendered in POVRay
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Date | |
Source | Own work |
Author | Eric Wieser |
//+FN +UA# #version 3.6; #include "colors.inc" global_settings { assumed_gamma 2.1 ambient_light color rgb 1 } // ---------------------------------------- camera { location <1.35, 1.35, 1.35> direction 1.5*z right x*image_width/image_height look_at <0.0, 0.0, 0.0> } light_source { <0, 0, 20> color rgb <1, 1, 1> area_light x*10, y*10, 5, 5 //jitter rotate -x*45 } light_source { <20, 0, 0> color rgb <1, 1, 1> area_light z*10, y*10, 5, 5 // jitter } #declare MODE_ARMCHAIR = 1; #declare MODE_RIBBON = 2; #declare MODE_ZIGZAG = 3; #macro nanoTube(mode, ba, bb, atomColor) #local s = sqrt(3)/2; #local b1 = max(ba, bb); #switch(mode) #case(MODE_ARMCHAIR) #local bb = bb + 6; #local r = (bb - 6)/pi; #macro ab2Vector(b, a) <b, sin(a/r)*r, cos(a/r)*r> #end #break #case(MODE_RIBBON) #macro ab2Vector(a, b) <a, 0, b> #end #break #case(MODE_ZIGZAG) #local ba = ba + 2; #local r = (ba*s)/pi; #macro ab2Vector(a, b) <cos(a/r)*r, sin(a/r)*r, b> #end #break #end #macro atom(pos) sphere { pos, 0.2 texture { pigment { color rgb atomColor } finish{ specular 0.4 } } } #end #macro bond(from, to) cylinder { from, to, 0.075 texture { pigment { color rgb atomColor*0.5 + 0.5 } finish{ specular 0.6 } } } #end union { #local m = -b1; #while (m < b1) #local n = -b1; #while (n < b1) #local a0 = (n*2 + m)*s; #local b0 = m*1.5; #if (abs(a0) < ba & abs(b0) < bb) union{ #if (b0 > -bb + 2) atom(ab2Vector(a0, b0)) #end #if (abs(b0) < bb-2) bond(ab2Vector(a0, b0), ab2Vector(a0, b0 + 1)) #end #if (b0<bb-2) atom(ab2Vector(a0, b0 + 1)) #if (a0 < ba-s) bond(ab2Vector(a0, b0 + 1), ab2Vector(a0 + s, b0 + 1.5)) #end #if (a0 > s-ba) bond(ab2Vector(a0, b0 + 1), ab2Vector(a0-s, b0 + 1.5)) #end #end } #end #local n = n + 1; #end #local m = m + 1; #end scale 0.08 } #end union { nanoTube(MODE_ARMCHAIR, 6, 12, <1, 0, 0>) nanoTube(MODE_ARMCHAIR, 9, 9, <0, 1, 0>) nanoTube(MODE_ARMCHAIR, 12, 6, <0, 0, 1> ) rotate -clock*60*x }
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