User:Le Forgeron/gsd

• Everything about HgPovray38 in User:Le_Forgeron/HgPovray38
• Code is available on branch hgpovray38 at https://github.com/LeForgeron/povray

GSD : Generalised Symmetric Difference

RANGE: (NUMBER|VECTOR)[,RANGE]
VECTOR: <NUMBER, NUMBER>
NUMBER: number of intersection, negative number are added to total number of object+1

The minimal number of objects is three.

Interunion

syntax is

interunion { 
  OBJECTS...
  [range{ RANGE } ]*
  [OBJECT_MODIFIERS...] 
 }

#version 3.7; global_settings { assumed_gamma 1.0 } camera { location -560*z direction z up y right image_width*x/image_height angle 5 } #include "colors.inc" interunion{ #for(i,0,359.99,60) #local pos= vrotate(6*x,i*z); cylinder { pos-z,pos+31*z,10 texture { pigment { color CH2RGB(i) filter 0.45 } } } #end range { <2,4> } clipped_by {cylinder { 30*z,0, 20 } } } box { 30*z-20*x-20*y, 30*z+20*x+20*y texture { pigment { color White }}} light_source { 10*<0,0,-20>, 0.9 } light_source { 10*<-5,10,-50>, 0.9 } light_source { 10*<-10,10,-50>, 0.9 } light_source { 10*<5,10,-50>, 0.9 } light_source { 10*<10,10,-50>, 0.9 }

Intermerge

syntax is

intermerge { 
  OBJECTS...
  [range{ RANGE } ]*
  [OBJECT_MODIFIERS...] 
 }

#version 3.7; global_settings { assumed_gamma 1.0 } camera { location -560*z direction z up y right image_width*x/image_height angle 5 } #include "colors.inc" intermerge{ #for(i,0,359.99,60) #local pos= vrotate(6*x,i*z); cylinder { pos-z,pos+31*z,10 texture { pigment { color CH2RGB(i) filter 0.45 } } } #end range { <2,4> } clipped_by {cylinder { 30*z,0, 20 } } } box { 30*z-20*x-20*y, 30*z+20*x+20*y texture { pigment { color White }}} light_source { 10*<0,0,-20>, 0.9 } light_source { 10*<-5,10,-50>, 0.9 } light_source { 10*<-10,10,-50>, 0.9 } light_source { 10*<5,10,-50>, 0.9 } light_source { 10*<10,10,-50>, 0.9 }

Sample scenes

scene 1

#version 3.8; global_settings{ assumed_gamma 1.0 } #include "colors.inc" #include "metals.inc" #include "skies.inc" #declare Unzoom = 3; #declare Radius = 18.5; camera { orthographic location 6*Radius*<-6,2,-9> direction Radius*z up Unzoom*Radius*y right Unzoom*Radius*x*image_width/image_height look_at 0 } light_source { Radius*<-2,50,-30>*100, 1 area_light 400*x*Radius,Radius*400*z, 10, 10 } interunion { #for(i,-1, 1, 2) #for(j,-1, 1, 2) #for(k,-1, 1, 2) sphere { <i,j,k>, Radius texture { T_Chrome_3A} } #end #end #end sphere { 0, Radius } range{ 5 } texture { T_Chrome_3B} } plane { y, -Radius texture { pigment { tiling 2 color_map{ [1/3 color (Salmon+IndianRed)/2] [2/3 color Salmon] [0.95 color IndianRed] [1 color Black] } scale Radius/2} } } sky_sphere { S_Cloud2 }

scene 2

#version 3.8; global_settings{ assumed_gamma 1.0 } #default { finish {emission 0.15 diffuse 0.75 reflection 0.0 phong 0.2 } } #declare Unzoom = 3; #declare Radius = 1.444; camera { orthographic location 6*Radius*<-6,2,-9> direction Radius*z up Unzoom*Radius*y right Unzoom*Radius*x*image_width/image_height look_at 0 } light_source { Radius*<-2,50,-30>*100, 1 } light_source { Radius*<0,0,-3>*100, 0.67 } light_source { Radius*<-10,0,3>*100, 0.67 } intermerge { sphere { x, Radius texture { pigment { color red 0.75 } } } sphere { -x, Radius texture { pigment { color blue 0.75 green 0.75 } } } sphere { y, Radius texture { pigment { color green 0.75 } } } sphere { -y, Radius texture { pigment { color red 0.75 blue 0.75 } } } sphere { z, Radius texture { pigment { color blue 0.75 } } } sphere { -z, Radius texture { pigment { color green 0.75 red 0.75 } } } sphere { 0, Radius*5/5 texture { uv_mapping pigment {checker pigment { color srgb 0.95 filter 0.95 }, pigment { color srgb 0.4 filter 0.7 } } scale <1/50,1/25,1> } } range{ 3 } interior { ior 1.333 } } plane { y, -Radius*1.2 texture { pigment { color srgb 0.75 } } } plane { z, Radius*2.2 texture { pigment { color srgb 0.95 } } }