summaryrefslogtreecommitdiff
path: root/Master/texmf-dist/doc/latex/circuit-macros/examples/svg/EscherSVG.m4
diff options
context:
space:
mode:
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.m4175
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