diff options
Diffstat (limited to 'Master/texmf-dist/doc/latex/circuit-macros/examples/svg/EscherSVG.m4')
-rw-r--r-- | Master/texmf-dist/doc/latex/circuit-macros/examples/svg/EscherSVG.m4 | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/Master/texmf-dist/doc/latex/circuit-macros/examples/svg/EscherSVG.m4 b/Master/texmf-dist/doc/latex/circuit-macros/examples/svg/EscherSVG.m4 deleted file mode 100644 index 637f99b29a4..00000000000 --- a/Master/texmf-dist/doc/latex/circuit-macros/examples/svg/EscherSVG.m4 +++ /dev/null @@ -1,175 +0,0 @@ -.PS -# EscherSVG.m4 -# https://tex.stackexchange.com/questions/129274/showcase-of-optical-illusions-made-with-tex-latex-luatex-context -threeD_init -[] -ifelse(1,1,` -[ - u=1/2.54 # unit size; could use scale for this - - define(`treadcolor',`0.8,0.75,0.7') - define(`darkgrn',`.1,.1,0') - define(`lightgrn',`.7,.7,.6') - - define(`northsteps',3) - define(`eaststeps',8) - define(`southsteps',7) - define(`weststeps',4) - define(`baselayers',10) - define(`eb',eval(baselayers+eaststeps)) - define(`ebs',eval(eb+southsteps)) - define(`under',7) - - azimuth = -45 # view angles - elevation = 25 - setview(azimuth,elevation,0) - # projected unit vectors - UX: Project(u,0,0) - UY: Project(0,-u,0) - UZ: Project(0,0,u) - # layer thickness in units of u - f= -(eaststeps*UX.y + southsteps*UY.y - weststeps*UX.y - northsteps*UY.y)/dnl - ((eaststeps+southsteps+weststeps+northsteps)*UZ.y) - # XY projection of 3D coords in units of u -define proj {UX*($1)+UY*($2)+UZ*($3)} - -define tread {line from UY/2 \ - to UY then to UY+UX then to UX then to (0,0) \ - then to UY/2 shaded rgbstring(treadcolor) \ - with .start at proj($1,$2,$3)+UY/2 } - -define wrect {line invis from (0,0) to UX*($4) \ - then to UX*($4)+UZ*($5) \ - then to UZ*($5) then to (0,0) with .start at proj($1,$2,$3) \ - shaded rgbstring(r,g,b)} - -define srect {line invis from (0,0) to UY*($4) then to UY*($4)+UZ*($5) \ - then to UZ*($5) then to (0,0) with .start at proj($1,$2,$3) \ - shaded rgbstring(r,g,b) } - # color blending -define(`blendwht',`between3D(`$1',`$2',`$3',`$4',1,1,1)') -define makergb { r = $1; g = $2; b = $3 } -define dorgb { gg = $2 - if $1==0 then { makergb(blendwht(gg,lightgrn)) } \ - else { makergb(blendwht(gg,darkgrn)) } } - -# East - for i=-under to baselayers do { - dorgb((i%2),0.2) - wrect(1,1,i*f,eaststeps-2,-f) } - for i=0 to eaststeps do { - dorgb((i%2),0.2) - wrect(i,1,(baselayers+i)*f,(eaststeps+1-i),-f) - tread(i,0,(baselayers+i)*f) - line from proj(i,1,(baselayers+i)*f) \ - to proj(i,1,(baselayers-1+i)*f) } -# South - for i=0 to eb do { - dorgb((i%2),0.4) - srect(eaststeps+1,0,i*f,southsteps+1,-f) } - for i=1 to southsteps do { - dorgb((i%2),0.4) - srect(eaststeps+1,i,(eb+i)*f,(southsteps+1-i),-f) - tread(eaststeps,i,(eb+i)*f) - line from proj(eaststeps+1,i,(eb+i)*f) \ - to proj(eaststeps+1,i,(eb+i-1)*f) } -# North - for i=-under to baselayers-northsteps-1 do { - dorgb((i%2),0.1) - srect(1,1,i*f,northsteps-1,-f) } - for i=1 to northsteps do { - dorgb((i%2),0.1) - srect(1,1,(baselayers-i)*f,i,-f) - wrect(0,1+i,(baselayers-i)*f,1,-f) - line from proj(0,1+i,(baselayers-i)*f) \ - to proj(0,1+i,(baselayers-i-1)*f) - line from proj(1,1+i,(baselayers-i)*f) \ - to proj(1,1+i,(baselayers-i-1)*f) - tread(0,i,(baselayers-i)*f) } -# West - for i=0 to ebs do { - dorgb((i%2),0.4) - wrect(eaststeps+1,southsteps+1,i*f,-(weststeps+1),-f) } - for i=0 to weststeps-1 do { - dorgb((i%2),0.4) - wrect(eaststeps-i,southsteps+1,(ebs+i+1)*f,-(weststeps-i),-f,) - srect(eaststeps-i,southsteps,(ebs+i+1)*f,1,-f) - if i!=weststeps-1 then { - line from proj(eaststeps-i,southsteps,(ebs+i+1)*f) \ - to proj(eaststeps-i,southsteps,(ebs+i)*f) } - line from proj(eaststeps-i,southsteps+1,(ebs+i+1)*f) \ - to proj(eaststeps-i,southsteps+1,(ebs+i)*f) - tread(eaststeps-(i+1),southsteps,(ebs+i+1)*f) } -# Corner lines - define(`dgreen',`outlined rgbstring(blendwht(0.2,darkgrn))') - line dgreen from proj(1,1,(baselayers-1)*f) to proj(1,1,-under*f) - line dgreen from proj(eaststeps+1,southsteps+1,ebs*f) \ - to proj(eaststeps+1,southsteps+1,-f) - line dgreen from proj(0,northsteps+1,(baselayers-northsteps)*f) \ - to last line.end-UX*(weststeps+1) then to last line.end \ - then to proj(eaststeps+1,0,-f) then to proj(eaststeps+1,0,eb*f) - ] -') - -ifelse(1,1,` -define(`DPL',`(project(`$1',`$2',`$3'))') -define(`ISL',` - S1: `$2'; E1: `$2' + `$3' - S2: `$4'; E2: `$4' + `$5' - `$1': line from S2 to intersect_(S1,E1,S2,E2) ') - -[ - bdp = 1.8 - bwd = 2.8 - bht = 1.5 - bth = bwd/10 - setview(-45,20,0) - - L1: line from DPL(0,0,0) to DPL(0,0,bht) \ - then to DPL(0,bwd,bht) \ - then to DPL(bdp,bwd,bht) \ - then to DPL(bdp,bwd,0) \ - then to DPL(bdp,0,0) \ - then to DPL(0,0,0) - L2: line from DPL(bth,bth,bht) to DPL(bth,bwd-bth,bht) \ - then to DPL(bdp-bth,bwd-bth,bht) \ - then to DPL(bdp-bth,bth,bht) \ - then to DPL(bth,bth,bht) - L3: line from DPL(bth,bth,0) to DPL(bth,bwd-bth,0) \ - then to DPL(bdp-bth,bwd-bth,0) \ - then to DPL(bdp-bth,bth,0) \ - then to DPL(bth,bth,0) - L4: line from DPL(bdp,bth,bht-bth) to DPL(bdp,bwd-bth,bht-bth) \ - then to DPL(bdp,bwd-bth,bth) \ - then to DPL(bth+bth,bwd-bth,bth) - L5: line from DPL(bdp-bth,0,bht-bth) to DPL(bth,0,bht-bth) \ - then to DPL(bth,0,bth) \ - then to DPL(bth,bwd-bth-bth,bth) - L6: line from DPL(0,0,bht) to DPL(bdp,0,bht) \ - then to DPL(bdp,bwd,bht) - L7: line from DPL(0,0,0) to DPL(0,bwd,0) \ - then to DPL(bdp,bwd,0) - ISL(L8,L4.start,UPy_,L4.end,UPz_) - ISL(L9,L4.start,UPy_,DPL(0,bwd,0),UPz_) - ISL(L10,L4.start,UPy_,L5.end,UPz_) - ISL(L11,L5.end,UPy_,L4.start,UPz_) - ISL(L12,L5.end,UPy_,DPL(bdp,0,bht),UPz_) - ISL(L13,L5.end,UPy_,L5.start,UPz_) - ISL(L14,DPL(bdp-bth,bth,bht),UPy_,DPL(bth,bwd-bth-bth,bht-bth),UPz_) - ISL(L15,L2.start,UPx_,DPL(bth,bwd-bth-bth,bht-bth),UPy_) - ISL(L16,DPL(bdp-bth,bth,bht),UPy_,DPL(bth,bwd-bth,bht),UPz_) - ISL(L17,DPL(bdp-bth,bth,bht),UPy_,DPL(bth+bth,bwd-bth,bht-bth),UPz_) - ISL(L18,DPL(bdp-bth,bth,bht),UPy_,DPL(bth+bth,bwd-bth,bht-bth),UPx_) - ISL(L19,L3.start,UPy_,L5.start+DPL(0,0,-bht+bth+bth),UPx_) - ISL(L20,L3.start,UPy_,L5.start+DPL(0,0,-bht+bth+bth),UPz_) - ISL(L21,L3.start,UPy_,DPL(bdp-bth,bth,0),UPz_) - ISL(L22,L3.start,UPy_,L4.start+DPL(0,0,-bht+bth+bth),UPz_) - ISL(L23,DPL(bth,bwd-bth,0),UPx_,L4.start+DPL(0,0,-bht+bth+bth),UPy_) - ISL(L24,L5.start,UPx_,DPL(bth,bth,bth),UPz_) - ISL(L25,L4.start,UPy_,DPL(bdp-bth,bwd-bth,bth),UPz_) - -ifelse(0,1,`for i=1 to 7 do { exec sprintf("\"L%g.s\" at L%g.start",i,i) } - for i=8 to 10 do { exec sprintf("\"L%g\" at L%g",i,i) }') -] with .sw at last [].se+(0.2,0) -') -.PE |