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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /graphics/sketch/Data
Initial commit
Diffstat (limited to 'graphics/sketch/Data')
-rw-r--r--graphics/sketch/Data/2tori.sk35
-rw-r--r--graphics/sketch/Data/buggy.sk256
-rw-r--r--graphics/sketch/Data/bunny.sk961
-rw-r--r--graphics/sketch/Data/cone.sk134
-rw-r--r--graphics/sketch/Data/hand.sk387
-rw-r--r--graphics/sketch/Data/test.sk84
6 files changed, 1857 insertions, 0 deletions
diff --git a/graphics/sketch/Data/2tori.sk b/graphics/sketch/Data/2tori.sk
new file mode 100644
index 0000000000..d5ca168163
--- /dev/null
+++ b/graphics/sketch/Data/2tori.sk
@@ -0,0 +1,35 @@
+# origin
+def O (0,0,0)
+def s1 [fillcolor=red]
+def s2 [linewidth=.2pt,linestyle=dotted]
+
+def sweeptorus {
+ def N 80
+ put { translate([1,0,0]) } {
+ sweep[s1,s2]{N, rotate(360/N, (-1,0,0), [0,1,0]) } {
+ line(0,-1,0)(1,-1,0)(1,1,0)(0,1,0)(0,-1,0)
+ }
+ }
+}
+
+def tori {
+ put { translate([-2.2,0,0]) } {sweeptorus}
+ put { rotate(-30, (O), [0,0,1]) then translate([2.2,.5,0]) } {sweeptorus}
+}
+
+def sceneProjection {
+
+ put { rotate(20, (O), [0,0,1]) then
+ rotate(30, (O), [1,0,0]) then
+ translate([0,0,-10]) then
+ perspective(7) } {tori}
+}
+
+{sceneProjection}
+
+global {
+ language tikz,context
+ set [linewidth=.1pt]
+ picturebox (-2,-2)(2,2)
+ frame
+}
diff --git a/graphics/sketch/Data/buggy.sk b/graphics/sketch/Data/buggy.sk
new file mode 100644
index 0000000000..f3dcbe7401
--- /dev/null
+++ b/graphics/sketch/Data/buggy.sk
@@ -0,0 +1,256 @@
+def O (0,0,0)
+def I [1,0,0]
+def J [0,1,0]
+def K [0,0,1]
+def cornerRad 0.1
+def tireRad 0.5
+def wheelWidth .4
+def nArcSegs 3
+def nTireSegs 20
+def nAxleSegs 6
+def axleRad .05
+def robotWidth 1.5
+def robotLength 2.5
+def bodyWidth .5
+def bodyHeight .4
+def steeringGamma .2
+def leftSteeringAngle atan2(2 * robotLength * steeringGamma, 2 - robotWidth * steeringGamma)
+def rightSteeringAngle atan2(2 * robotLength * steeringGamma, 2 + robotWidth * steeringGamma)
+
+def wheelRad tireRad - cornerRad
+def wheelXofs wheelWidth/2 - cornerRad
+
+def rightArc put {
+ translate([ wheelXofs, wheelRad, 0])
+} sweep { nArcSegs, rotate(90 / nArcSegs) } (cornerRad,0)
+
+def leftArc put {
+ translate([-wheelXofs, wheelRad, 0])
+} sweep { nArcSegs, rotate(90 / nArcSegs) } (0,cornerRad)
+
+def tread line(wheelXofs, tireRad)(-wheelXofs, tireRad)
+
+def hubPlate sweep[fillcolor=lightgray] { nTireSegs<>, rotate(-360 / nTireSegs, (O), [I]) } (0,wheelRad)
+
+def tire sweep[fillcolor=lightgray]{ nTireSegs, rotate(360 / nTireSegs, (O), -[I]) } {
+ {leftArc}
+ {rightArc}
+ {tread}
+}
+
+def wheel {
+ def leftHubPlate put { translate( [-wheelWidth/2, 0, 0] ) } {hubPlate}
+ def rightHubPlate put { rotate(180, (O), [K]) } {leftHubPlate}
+ {rightHubPlate}
+ {leftHubPlate}
+ {tire}
+}
+
+def axle sweep[fillcolor=darkgray]{ nAxleSegs, rotate(360 / nAxleSegs, (O), -[I]) }
+ line (robotWidth/2, axleRad)(-robotWidth/2, axleRad)
+
+def leftSteerableWheel put {
+ rotate(leftSteeringAngle, (O), [J]) then
+ translate( [-robotWidth/2, 0, 0] )
+} {wheel}
+
+def rightSteerableWheel put {
+ rotate(rightSteeringAngle, (O), [J]) then
+ translate( [robotWidth/2, 0, 0] )
+} {wheel}
+
+def steerableAxleAssembly {
+ {leftSteerableWheel}
+ {rightSteerableWheel}
+ {axle}
+}
+
+def fixedAxleAssembly {
+ put { translate( [-robotWidth/2, 0, 0] ) } {wheel}
+ put { translate( [ robotWidth/2, 0, 0] ) } {wheel}
+ {axle}
+}
+
+def bodyopts [fillcolor=white]
+
+def bodyCorner # first octant "rounded corner"
+ sweep [bodyopts]{ nArcSegs, rotate(90 / nArcSegs, (O), [I]) }
+ sweep { nArcSegs, rotate(90 / nArcSegs, (O),-[K]) } (0,cornerRad)
+
+def zBodyEdge
+ sweep [bodyopts] { 1, translate([K]) }
+ sweep { nArcSegs, rotate(90 / nArcSegs, (O), -[K]) } (0,cornerRad,0)
+
+def xBodyEdge # positive y-z quadrant about x axis quarter-pipe of unit length
+ sweep [bodyopts] { 1, translate([I]) }
+ sweep { nArcSegs, rotate(90 / nArcSegs, (O), -[I]) } (0,0,cornerRad)
+
+def body {
+ def xOfs bodyWidth/2 - cornerRad
+ def yOfs bodyHeight/2 - cornerRad
+ def zOfs robotLength/2 + cornerRad
+ def posZend {
+ # 4 corners
+ put { translate([ xOfs, yOfs, zOfs]) } {bodyCorner}
+ put { rotate(90, (O), [K]) then
+ translate([-xOfs, yOfs, zOfs]) } {bodyCorner}
+ put { rotate(180, (O), [K]) then
+ translate([-xOfs, -yOfs, zOfs]) } {bodyCorner}
+ put { rotate(270, (O), [K]) then
+ translate([ xOfs, -yOfs, zOfs]) } {bodyCorner}
+ # 4 edges
+ put { scale([2*xOfs, 1, 1]) then
+ translate([-xOfs, yOfs, zOfs]) } {xBodyEdge}
+ put { scale([2*yOfs, 1, 1]) then
+ rotate(90, (O), [K]) then
+ translate([-xOfs,-yOfs, zOfs]) } {xBodyEdge}
+ put { scale([2*xOfs, 1, 1]) then
+ rotate(180, (O), [K]) then
+ translate([ xOfs,-yOfs, zOfs]) } {xBodyEdge}
+ put { scale([2*yOfs, 1, 1]) then
+ rotate(270, (O), [K]) then
+ translate([ xOfs, yOfs, zOfs]) } {xBodyEdge}
+ def z zOfs + cornerRad
+ polygon[bodyopts](xOfs,yOfs,z)(-xOfs,yOfs,z)(-xOfs,-yOfs,z)(xOfs,-yOfs,z)
+ }
+ def top {
+ put { scale([1,1,2*zOfs]) then
+ translate([xOfs, yOfs, -zOfs]) } {zBodyEdge}
+ put { scale([1,1,2*zOfs]) then
+ rotate(90) then
+ translate([-xOfs, yOfs, -zOfs]) } {zBodyEdge}
+ def y bodyHeight/2
+ polygon[bodyopts](xOfs,y,zOfs)(xOfs,y,-zOfs)(-xOfs,y,-zOfs)(-xOfs,y,zOfs)
+ }
+ def posXside {
+ def x bodyWidth/2
+ polygon[bodyopts](x,yOfs,zOfs)(x,-yOfs,zOfs)(x,-yOfs,-zOfs)(x,yOfs,-zOfs)
+ }
+
+ # ends of the body
+ {posZend}
+ put { rotate(180, (O), [I]) } {posZend}
+
+ {top}
+ {posXside}
+
+ # bottom and negative X side
+ put { rotate(180) } {
+ {top}
+ {posXside}
+ }
+}
+
+def robot {
+ {fixedAxleAssembly}
+ put { translate([0, 0, -robotLength]) } {steerableAxleAssembly}
+ put { translate([0, 0, -robotLength/2]) } {body}
+}
+
+def centerXform
+ translate(robotLength/2 * [K])
+ then rotate(90, (O), [J])
+
+def winWidth
+ <zoomed_in> 0.6
+ <zoomed_out> 1.5
+ <> 1
+
+def foreshorteningFactor
+ <fish_eye> .3
+ <parallel> 30
+ <> 1 # base
+
+def pai 8
+def panAngle
+ <vai> -pai
+ <vaii> -pai
+ <vaiii> -pai
+ <vaiv> pai
+ <vav> 0
+ <vavi> -pai
+ <vavii> pai
+ <vaviii> pai
+ <vaix> pai
+ <> 0
+
+def panAxis
+ <vai> [-1,-1,0]
+ <vaii> [-1,0,0]
+ <vaiii> [-1,1,0]
+ <vaiv> [0,1,0]
+ <vav> [0,1,0]
+ <vavi> [0,1,0]
+ <vavii> [-1,1,0]
+ <vaviii> [-1,0,0]
+ <vaix> [-1,-1,0]
+ <> [0,1,0]
+
+def eyeAxis [10,7,10]
+def eyeI (O) + .5 * foreshorteningFactor * [eyeAxis]
+def dvI (O) - (eyeI)
+
+def upRot
+ <tilt_left> -20
+ <tilt_right> 20
+ <> 0
+
+def up [0,1,0] then rotate(upRot, (O), -[eyeAxis])
+
+def viewXformI
+ <parallel>
+ view ((eyeI), [dvI], [up])
+ then rotate(-panAngle, (O), [panAxis])
+ then perspective(|[dvI]|)
+ then scale(1.5/winWidth)
+ then scale([1,1,1000])
+ <> view ((eyeI), [dvI], [up])
+ then rotate(-panAngle, (O), [panAxis])
+ then perspective(|[dvI]|)
+ then scale(1.5/winWidth)
+
+def dashframe {
+ line[linestyle=dashed](-1,-1, 1)( 1,-1, 1)(1,1, 1)(-1,1, 1)(-1,-1, 1)
+ line[linestyle=dashed](-1,-1,-1)( 1,-1,-1)(1,1,-1)(-1,1,-1)(-1,-1,-1)
+ line[linestyle=dashed](-1,-1, 1)(-1,-1,-1)
+ line[linestyle=dashed]( 1,-1, 1)( 1,-1,-1)
+ line[linestyle=dashed]( 1, 1, 1)( 1, 1,-1)
+ line[linestyle=dashed](-1, 1, 1)(-1, 1,-1)
+}
+
+def floor_grid {
+ def opts [linewidth=.2pt]
+ def nX 7
+ def nZ 5
+ def dx (robotLength+tireRad*2) + 2
+ def dz (robotWidth+wheelWidth) + 2
+ def y -tireRad-.001
+
+ repeat { nX+1, translate([dx/nX,0,0]) } line[opts](-dx/2,y,-dz/2)(-dx/2,y,dz/2)
+ repeat { nZ+1, translate([0,0,dz/nZ]) } line[opts](-dx/2,y,-dz/2)(dx/2,y,-dz/2)
+}
+
+put { [[viewXformI]] } {
+ put { [[centerXform]] } {robot}
+ {floor_grid}
+# put { scale([(robotLength+tireRad*2)/2, tireRad, (robotWidth+wheelWidth)/2]) } {dashframe}
+}
+
+#def frameOfs 2
+#put { [[viewXformI]] then translate(-frameOfs * [I]) } {robot}
+#put { [[viewXformI]] then translate(frameOfs * [I]) } {robot}
+#put { [[simpleViewXform]] then translate(2*frameOfs * [I]) } {robot}
+
+
+global {
+ set [linewidth=.3pt]
+
+ % set up a bounding box
+ def w 3
+ def ar 3/2.2
+ def cbp1 (-w,-w/ar,0)
+ def cbp2 (w,w/ar,0)
+
+ picturebox [.5] (cbp1)(cbp2)
+ frame
+}
diff --git a/graphics/sketch/Data/bunny.sk b/graphics/sketch/Data/bunny.sk
new file mode 100644
index 0000000000..2015c1a853
--- /dev/null
+++ b/graphics/sketch/Data/bunny.sk
@@ -0,0 +1,961 @@
+def bunny {
+ polygon(-0.024861,0.122913,0.024543)(-0.029876,0.124252,0.020967)(-0.030720,0.117989,0.030617)
+ polygon(-0.069870,0.168536,-0.031332)(-0.077145,0.167706,-0.029880)(-0.070211,0.165303,-0.019466)
+ polygon(-0.042962,0.043024,-0.017629)(-0.042721,0.034356,-0.019130)(-0.051293,0.034227,-0.012901)
+ polygon(-0.028499,0.090492,-0.029085)(-0.031564,0.095933,-0.023680)(-0.029013,0.106719,-0.020748)
+ polygon(-0.017634,0.127605,0.017937)(-0.019276,0.119853,0.032806)(-0.014179,0.126270,0.026642)
+ polygon(-0.017634,0.127605,0.017937)(-0.029568,0.126072,0.014634)(-0.029876,0.124252,0.020967)
+ polygon(-0.005907,0.127934,0.027462)(-0.019276,0.119853,0.032806)(-0.006185,0.122729,0.034787)
+ polygon(-0.056250,0.135013,0.033045)(-0.047913,0.129301,0.026965)(-0.043539,0.130014,0.017533)
+ polygon(0.017440,0.127694,0.018535)(0.005822,0.128060,0.027902)(0.014434,0.127081,0.026297)
+ polygon(-0.027772,0.038256,0.032287)(-0.033075,0.035522,0.029224)(-0.035244,0.035057,0.017826)
+ polygon(-0.029876,0.124252,0.020967)(-0.043539,0.130014,0.017533)(-0.038891,0.123761,0.024978)
+ polygon(-0.006001,0.130398,0.017899)(-0.017634,0.127605,0.017937)(-0.014179,0.126270,0.026642)
+ polygon(-0.005907,0.127934,0.027462)(-0.014179,0.126270,0.026642)(-0.019276,0.119853,0.032806)
+ polygon(-0.089811,0.132401,0.007057)(-0.085027,0.146034,0.005860)(-0.085698,0.136903,0.001921)
+ polygon(-0.051632,0.145001,0.018480)(-0.056395,0.154565,0.016878)(-0.057352,0.144989,0.031520)
+ polygon(0.005955,0.131024,0.017825)(-0.005907,0.127934,0.027462)(0.005822,0.128060,0.027902)
+ polygon(-0.078792,0.070777,0.006856)(-0.078488,0.070528,0.017446)(-0.084526,0.080057,0.005307)
+ polygon(-0.062285,0.162360,-0.039629)(-0.068261,0.170398,-0.043700)(-0.069870,0.168536,-0.031332)
+ polygon(-0.067493,0.128392,-0.008635)(-0.080391,0.129634,-0.004698)(-0.067968,0.142877,-0.007576)
+ polygon(0.005975,0.130858,0.005795)(-0.006001,0.130398,0.017899)(0.005955,0.131024,0.017825)
+ polygon(-0.068855,0.122052,0.051757)(-0.070652,0.130630,0.050250)(-0.077978,0.132550,0.051349)
+ polygon(-0.078061,0.120653,0.051400)(-0.068855,0.122052,0.051757)(-0.077978,0.132550,0.051349)
+ polygon(-0.077978,0.132550,0.051349)(-0.066613,0.133021,0.044704)(-0.079789,0.143760,0.042699)
+ polygon(-0.066613,0.133021,0.044704)(-0.068301,0.144828,0.041369)(-0.079789,0.143760,0.042699)
+ polygon(-0.078488,0.070528,0.017446)(-0.084426,0.079771,0.018633)(-0.084526,0.080057,0.005307)
+ polygon(-0.005931,0.130215,0.005954)(-0.017634,0.127605,0.017937)(-0.006001,0.130398,0.017899)
+ polygon(0.005822,0.128060,0.027902)(-0.005907,0.127934,0.027462)(-0.006185,0.122729,0.034787)
+ polygon(-0.014219,0.174013,-0.025981)(-0.009671,0.173225,-0.026495)(-0.010666,0.167541,-0.019901)
+ polygon(0.005698,0.105890,0.043551)(0.006786,0.115841,0.038808)(-0.005982,0.115409,0.040203)
+ polygon(-0.017634,0.127605,0.017937)(-0.029876,0.124252,0.020967)(-0.024861,0.122913,0.024543)
+ polygon(0.014788,0.090975,0.050966)(0.018544,0.094811,0.047759)(0.005698,0.105890,0.043551)
+ polygon(-0.017357,0.127613,0.005269)(-0.029568,0.126072,0.014634)(-0.017634,0.127605,0.017937)
+ polygon(-0.056637,0.047018,0.030581)(-0.053091,0.056740,0.029396)(-0.057276,0.043243,0.042862)
+ polygon(-0.047309,0.145156,0.006885)(-0.051632,0.145001,0.018480)(-0.049353,0.139298,0.014796)
+ polygon(-0.091145,0.118816,0.029844)(-0.090486,0.118611,0.041215)(-0.091206,0.131415,0.029531)
+ polygon(0.005179,0.093174,0.053587)(0.014788,0.090975,0.050966)(0.005698,0.105890,0.043551)
+ polygon(-0.084426,0.079771,0.018633)(-0.088852,0.090972,0.017903)(-0.084526,0.080057,0.005307)
+ polygon(-0.017513,0.162126,-0.014549)(-0.017841,0.170484,-0.018114)(-0.010666,0.167541,-0.019901)
+ polygon(0.029727,0.042550,0.030498)(0.043267,0.045829,0.027825)(0.033664,0.054054,0.035084)
+ polygon(-0.067953,0.041859,0.006684)(-0.056628,0.054703,0.007446)(-0.059413,0.047138,0.006285)
+ polygon(-0.055677,0.093521,0.044207)(-0.068686,0.092370,0.042198)(-0.068308,0.080332,0.040711)
+ polygon(-0.055677,0.093521,0.044207)(-0.067874,0.106952,0.040372)(-0.068686,0.092370,0.042198)
+ polygon(-0.055677,0.093521,0.044207)(-0.055496,0.103898,0.041141)(-0.067874,0.106952,0.040372)
+ polygon(0.006398,0.043701,0.046826)(0.003768,0.047755,0.050204)(-0.006597,0.042729,0.046939)
+ polygon(0.006398,0.043701,0.046826)(0.005294,0.055680,0.053288)(0.003768,0.047755,0.050204)
+ polygon(-0.055894,0.079259,0.043534)(-0.055677,0.093521,0.044207)(-0.068308,0.080332,0.040711)
+ polygon(-0.017357,0.127613,0.005269)(-0.017634,0.127605,0.017937)(-0.005931,0.130215,0.005954)
+ polygon(-0.005974,0.105897,0.044067)(0.005698,0.105890,0.043551)(-0.005982,0.115409,0.040203)
+ polygon(0.007087,0.067322,0.055337)(0.007065,0.081192,0.055819)(-0.006072,0.067710,0.056450)
+ polygon(-0.017357,0.127613,0.005269)(-0.031222,0.126304,0.005149)(-0.029568,0.126072,0.014634)
+ polygon(0.006786,0.115841,0.038808)(0.005960,0.122504,0.034627)(-0.006185,0.122729,0.034787)
+ polygon(0.003768,0.047755,0.050204)(0.005294,0.055680,0.053288)(-0.005626,0.056504,0.053882)
+ polygon(-0.006597,0.042729,0.046939)(0.003768,0.047755,0.050204)(-0.005626,0.056504,0.053882)
+ polygon(-0.042538,0.155441,-0.007494)(-0.037956,0.161954,-0.012802)(-0.029483,0.158293,-0.006193)
+ polygon(-0.088852,0.090972,0.017903)(-0.088258,0.089869,0.006966)(-0.084526,0.080057,0.005307)
+ polygon(-0.019276,0.119853,0.032806)(-0.024861,0.122913,0.024543)(-0.030720,0.117989,0.030617)
+ polygon(0.038180,0.105121,0.026695)(0.040087,0.105210,0.017342)(0.037043,0.110443,0.020723)
+ polygon(-0.080391,0.129634,-0.004698)(-0.078703,0.144274,-0.003891)(-0.067968,0.142877,-0.007576)
+ polygon(-0.017614,0.038606,-0.005845)(-0.029913,0.038391,-0.005827)(-0.017781,0.038255,-0.015450)
+ polygon(0.007496,0.098350,0.048826)(0.005698,0.105890,0.043551)(0.005179,0.093174,0.053587)
+ polygon(0.005960,0.122504,0.034627)(0.006786,0.115841,0.038808)(0.018870,0.119862,0.032409)
+ polygon(-0.017634,0.127605,0.017937)(-0.024861,0.122913,0.024543)(-0.019276,0.119853,0.032806)
+ polygon(-0.042712,0.042165,0.042700)(-0.056637,0.047018,0.030581)(-0.057276,0.043243,0.042862)
+ polygon(-0.043198,0.055578,0.039084)(-0.053091,0.056740,0.029396)(-0.056637,0.047018,0.030581)
+ polygon(0.017521,0.055211,-0.027276)(0.017565,0.067934,-0.028939)(0.031738,0.067998,-0.018353)
+ polygon(-0.043677,0.078916,0.042886)(-0.055894,0.079259,0.043534)(-0.054531,0.071460,0.039704)
+ polygon(-0.043677,0.078916,0.042886)(-0.043192,0.092115,0.043269)(-0.055677,0.093521,0.044207)
+ polygon(-0.055894,0.079259,0.043534)(-0.043677,0.078916,0.042886)(-0.055677,0.093521,0.044207)
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+ polygon(-0.041679,0.042028,-0.009997)(-0.029913,0.038391,-0.005827)(-0.043031,0.034139,-0.005660)
+ polygon(-0.066904,0.115717,0.047348)(-0.068855,0.122052,0.051757)(-0.078061,0.120653,0.051400)
+ polygon(-0.048809,0.066013,0.037396)(-0.054531,0.071460,0.039704)(-0.056117,0.065433,0.034198)
+ polygon(-0.043104,0.067439,0.040774)(-0.054531,0.071460,0.039704)(-0.048809,0.066013,0.037396)
+ polygon(-0.029913,0.038391,-0.005827)(-0.041679,0.042028,-0.009997)(-0.032229,0.044659,-0.016750)
+ polygon(0.043693,0.041197,0.017720)(0.028662,0.035841,0.018750)(0.043554,0.041110,0.005799)
+ polygon(0.005600,0.034660,-0.017932)(0.005243,0.039134,-0.021947)(-0.006020,0.038124,-0.014518)
+ polygon(-0.041940,0.034370,0.029967)(-0.056947,0.034942,0.042372)(-0.055430,0.034256,0.029795)
+ polygon(-0.041940,0.034370,0.029967)(-0.042802,0.035157,0.041687)(-0.056947,0.034942,0.042372)
+ polygon(-0.005898,0.038178,0.017706)(-0.017808,0.038196,0.017811)(-0.005847,0.038342,0.005908)
+ polygon(0.001035,0.037592,0.000952)(0.005121,0.034840,0.005585)(-0.005847,0.038342,0.005908)
+ polygon(-0.018062,0.035263,-0.019540)(-0.031577,0.035849,-0.017967)(-0.031548,0.034302,-0.028408)
+ polygon(-0.017761,0.034332,-0.025914)(-0.018062,0.035263,-0.019540)(-0.031548,0.034302,-0.028408)
+ polygon(-0.017781,0.038255,-0.015450)(-0.032229,0.044659,-0.016750)(-0.031577,0.035849,-0.017967)
+ polygon(-0.018062,0.035263,-0.019540)(-0.017781,0.038255,-0.015450)(-0.031577,0.035849,-0.017967)
+ polygon(-0.005966,0.038895,0.029925)(-0.017909,0.038590,0.029617)(-0.017808,0.038196,0.017811)
+ polygon(-0.035244,0.035057,0.017826)(-0.042462,0.034314,0.005906)(-0.034232,0.033759,0.007175)
+ def p1 (0,.18,0)
+ def p2 (0,0,0)
+ def p3 (.05,0,0)
+ def p4 (0,0,.05)
+ special|\psline[linecolor=red,linestyle=dashed]#1#2#3
+ \psline[linecolor=red,linestyle=dashed]#2#4|
+ [lay=over](p1)(p2)(p3)(p4)
+ line[linecolor=red,linewidth=1pt](p1)(p2)(p3)
+ line[linecolor=red,linewidth=1pt](p2)(p4)
+}
+put { view( (2,4.5,3) ) then scale(100) } {bunny}
+global { set [linewidth=.3pt] }
diff --git a/graphics/sketch/Data/cone.sk b/graphics/sketch/Data/cone.sk
new file mode 100644
index 0000000000..4978008f32
--- /dev/null
+++ b/graphics/sketch/Data/cone.sk
@@ -0,0 +1,134 @@
+% truncated cone diagram
+% Modified for PGF/TikZ
+def O (0,0,0)
+def I [1,0,0]
+def J [0,1,0]
+def K [0,0,1]
+
+def p0 (1,2)
+def p1 (1.5,0)
+def N 8
+def seg_rot rotate(360 / N, [J])
+def dx
+ <labeled> 2
+ <> 2.3
+def dy
+ <labeled> 2
+ <> 3.3
+def dz dx
+
+def basic_cone {
+
+ % draw the cone; this is the easy part!
+ sweep[cull=false,fill=blue!20,fill opacity=0.8] { N, [[seg_rot]] } line(p0)(p1)
+
+ % draw the axes
+ def ax (dx,0,0)
+ def ay (0,dy,0)
+ def az (0,0,dz)
+ line[arrows=<->,linewidth=.4pt](ax)(O)(ay)
+ line[arrows=->,linewidth=.4pt](O)(az)
+ % repeat dotted as an overlay to hint at the hidden lines
+ %line[lay=over,linestyle=dotted,linewidth=.4pt](ax)(O)(ay)
+ % line[lay=over,linestyle=dotted,linewidth=.4pt](O)(az)
+ % label
+ special|\path #1 node[below] {$x$}
+ #2 node[above] {$y$}
+ #3 node[left] {$z$};|
+ (ax)(ay)(az)
+
+ % height measurement mark takes too much code!
+ def c0 (p0) then scale([J])
+ def hdim_ref unit((p1) - (O)) then [[seg_rot]]^2
+ def h00 (c0) + 1.1 * [hdim_ref]
+ def h01 (c0) + 1.9 * [hdim_ref]
+ def h02 (c0) + 1.8 * [hdim_ref]
+ line(h00)(h01)
+ def h10 (O) + 1.6 * [hdim_ref]
+ def h11 (O) + 1.9 * [hdim_ref]
+ def h12 (O) + 1.8 * [hdim_ref]
+ line(h10)(h11)
+ line[arrows=<->](h02)(h12)
+ def hm2 ((h02)-(O)+(h12)-(O)) / 2 + (O)
+ special|\node[ann] at #1 {$h$};|(hm2)
+
+ % radius measurement marks
+ def gap [0,.2,0]
+ % first r1
+ def up1 [0,3.1,0]
+ def r1 ((p1) then [[seg_rot]]^-2) + [up1]
+ def r1c (r1) then scale([J])
+ def r1t (r1) + [gap]
+ def r1b ((r1t) then scale([1,0,1])) + [gap]
+ line[arrows=<->](r1c)(r1)
+ line(r1b)(r1t)
+ def r1m ((r1) - (O) + (r1c) - (O)) / 2 + (O)
+ special |\node[ann] at #1 {$r_1$};|(r1m)
+ % same drill for r0, but must project down first
+ def up0 [0,2.7,0]
+ def r0 ((p0) then scale([1,0,1]) then [[seg_rot]]^-2) + [up0]
+ def r0c (r0) then scale([J])
+ def r0t (r0) + [gap]
+ def r0b ((p0) then [[seg_rot]]^-2) + [gap]
+ line[arrows=<->](r0c)(r0)
+ line(r0b)(r0t)
+ def r0m ((r0) - (O) + (r0c) - (O)) / 2 + (O)
+ special |\node[ann] at #1 {$r_0$};|(r0m)
+}
+
+def labeled_cone {
+
+ % the "ghost" of the entire cone
+ sweep[draw=lightgray,cull=false] { N-1, [[seg_rot]] }
+ line(p0)(p1)
+
+ % for the highlighted face, we need explicit points
+ def p00 (p0) then [[seg_rot]]^-1
+ def p10 (p1) then [[seg_rot]]^-1
+ def p01 (p0)
+ def p11 (p1)
+ %polygon[showpoints=true](p00)(p10)(p11)(p01)
+ polygon[fillcolor=red,dotsep=semitransparent](p00)(p10)(p11)(p01)
+ % TikZ does not have a showpoints option. Use dots.
+ dots(p00)(p10)(p11)(p01)
+ % TikZ special for labels.
+ special|\fill[black,font=\footnotesize]
+ #1 node [above] {$P_{00}$}
+ #2 node [below] {$P_{10}$}
+ #3 node [above] {$P_{01}$}
+ #4 node [below] {$P_{11}$};|
+ (p00)(p10)(p01)(p11)
+ def mid ((p00)-(O)+(p10)-(O)+(p11)-(O)+(p01)-(O))/4+(O)
+ % The TikZ arc operation starts at the current point. We therefore
+ % need to shift it to get mid to be the center of the arc
+ special|\draw #1+(-60:.25) [yscale=1.3,->] arc(-60:240:.25);|
+ [lay=over](mid)
+ def mid_left ((p00)-(O)+(p10)-(O))/2+(O)
+ def mid_right ((p11)-(O)+(p01)-(O))/2+(O)
+ special|\path[font=\footnotesize]
+ #1 node[left] {$j$}
+ #2 node[right] {$j\hbox{$+$}1$};|
+ (mid_left)(mid_right)
+ def top_lbl (p01) then [[seg_rot]]^2
+ def bot_lbl (p11) then [[seg_rot]]^2
+ special|\path[font=\footnotesize]
+ #1 node[right] {$i\hbox{$=$}0$}
+ #2 node[right] {$i\hbox{$=$}1$};|
+ (top_lbl)(bot_lbl)
+}
+
+
+
+
+def cone
+ <labeled> {labeled_cone}
+ <> {basic_cone}
+
+put { view((10,4,2)) } {cone}
+
+% Cool trick: lay = under forces this to be output first in the tikz picture block.
+special |\tikzstyle{ann} = [fill=white,font=\footnotesize,inner sep=1pt]|[lay=under]
+
+global {
+ language tikz
+}
diff --git a/graphics/sketch/Data/hand.sk b/graphics/sketch/Data/hand.sk
new file mode 100644
index 0000000000..9d37eee2f1
--- /dev/null
+++ b/graphics/sketch/Data/hand.sk
@@ -0,0 +1,387 @@
+%
+% Very simple model of my hand
+%
+% Gene Ressler
+%
+% In particular, this completely ignores the carpal joints.
+%
+% Try this with various options to sketch.
+%
+% -D fist \
+% -D ok > none or one of these
+% -D spread /
+%
+% -D topview \
+% -D frontview > none or one of these
+% -D sideview /
+%
+% -D repeated
+%
+% I am not responsible for modifications to draw
+% obscene gestures.
+
+% parameterization of model
+
+% for fingers, 0 is thumb, 1 is index,
+% 2 is middle, 3 is ring, 4 is little
+
+% lateral angle between fingers
+def spread_rot
+ <fist> 0
+ <ok> 5
+ <spread>10
+ <> 0
+% and between thumb and index finger
+def spread_rot_0
+ <fist> 40
+ <ok> 55
+ <spread> 55
+ <> 25
+
+% rotations of finger parts
+% distal is the finger tip
+% middle is below that
+% meta is the knuckle
+def distal_0_rot
+ <fist> 60
+ <ok> 45
+ <> -10
+def middle_0_rot
+ <fist> 50
+ <ok> 40
+ <spread> 0
+ <> 10
+def meta_0_rot
+ <fist> 40
+ <ok> 35
+ <> 0
+
+def distal_1_rot
+ <fist> 90
+ <ok> 54
+ <> 0
+def meta_1_rot
+ <fist> 90
+ <ok> 60
+ <> 0
+
+def distal_2_rot
+ <fist> 90
+ <ok> 30
+ <> 0
+def meta_2_rot
+ <fist> 90
+ <ok> 35
+ <> 0
+
+def distal_3_rot
+ <fist> 90
+ <ok> 30
+ <> 0
+def meta_3_rot
+ <fist> 90
+ <ok> 30
+ <> 0
+
+def distal_4_rot
+ <fist> 90
+ <ok> 30
+ <> 0
+def meta_4_rot
+ <fist> 90
+ <ok> 25
+ <> 0
+
+% end parameters
+
+% useful stuff
+def O (0,0,0)
+def I [1,0,0]
+def J [0,1,0]
+def K [0,0,1]
+
+% dependent rotations
+% fingers have the last two joints wired together
+def middle_1_rot distal_1_rot
+def middle_2_rot distal_2_rot
+def middle_3_rot distal_3_rot
+def middle_4_rot distal_4_rot
+
+% proportions
+def proximal_rad .6
+def distal_rad .5
+def distal_len 1.8
+def joint_rad .6
+def joint_gap .7
+def middle_ratio 1.8
+def proximal_distal_ratio proximal_rad / distal_rad
+
+% primitive segment of a finger is a truncated cone
+def segment {
+ def n_faces 8
+ sweep { n_faces<>, rotate(360 / n_faces, [J]) }
+ line(proximal_rad, 0)(distal_rad, distal_len)
+}
+
+% spheres to connect segments at joints
+def joint_sphere {
+ def n_joint_faces 8
+ sweep [fillcolor=lightgray] { n_joint_faces, rotate(360 / n_joint_faces, [J]) }
+ sweep { n_joint_faces, rotate(180 / n_joint_faces) }
+ (0, -joint_rad)
+}
+
+% following is five separate definitions for five fingers
+% with parameters, this would be much shorter!
+
+def distal_0 {
+ put { translate(joint_gap * joint_rad * [J])
+ then rotate(distal_0_rot, [I])
+ then translate((distal_len + joint_gap * joint_rad) * [J]) }
+ {segment}
+ put { rotate(distal_0_rot / 2, [I])
+ then translate((distal_len + joint_gap * joint_rad) * [J]) }
+ {joint_sphere}
+ put { scale( [J] + proximal_distal_ratio * ([I]+[K]) ) }
+ {segment}
+}
+
+def finger_0 {
+ put { translate(joint_gap * joint_rad * [J])
+ then rotate(middle_0_rot, [I])
+ then translate((middle_ratio * distal_len + joint_gap * joint_rad) * [J]) }
+ {distal_0}
+ put { scale(proximal_distal_ratio)
+ then rotate(middle_0_rot / 2, [I])
+ then translate((middle_ratio * distal_len + joint_gap * joint_rad) * [J]) }
+ {joint_sphere}
+ put { scale( middle_ratio * [J] + proximal_distal_ratio^2 * ([I]+[K]) ) }
+ {segment}
+}
+
+def distal_1 {
+ put { translate(joint_gap * joint_rad * [J])
+ then rotate(distal_1_rot, [I])
+ then translate((distal_len + joint_gap * joint_rad) * [J]) }
+ {segment}
+ put { rotate(distal_1_rot / 2, [I])
+ then translate((distal_len + joint_gap * joint_rad) * [J]) }
+ {joint_sphere}
+ put { scale( [J] + proximal_distal_ratio * ([I]+[K]) ) }
+ {segment}
+}
+
+def finger_1 {
+ put { translate(joint_gap * joint_rad * [J])
+ then rotate(middle_1_rot, [I])
+ then translate((middle_ratio * distal_len + joint_gap * joint_rad) * [J]) }
+ {distal_1}
+ put { scale(proximal_distal_ratio)
+ then rotate(middle_1_rot / 2, [I])
+ then translate((middle_ratio * distal_len + joint_gap * joint_rad) * [J]) }
+ {joint_sphere}
+ put { scale( middle_ratio * [J] + proximal_distal_ratio^2 * ([I]+[K]) ) }
+ {segment}
+}
+
+def distal_2 {
+ put { translate(joint_gap * joint_rad * [J])
+ then rotate(distal_2_rot, [I])
+ then translate((distal_len + joint_gap * joint_rad) * [J]) }
+ {segment}
+ put { rotate(distal_2_rot / 2, [I])
+ then translate((distal_len + joint_gap * joint_rad) * [J]) }
+ {joint_sphere}
+ put { scale( [J] + proximal_distal_ratio * ([I]+[K]) ) }
+ {segment}
+}
+
+def finger_2 {
+ put { translate(joint_gap * joint_rad * [J])
+ then rotate(middle_2_rot, [I])
+ then translate((middle_ratio * distal_len + joint_gap * joint_rad) * [J]) }
+ {distal_2}
+ put { scale(proximal_distal_ratio)
+ then rotate(middle_2_rot / 2, [I])
+ then translate((middle_ratio * distal_len + joint_gap * joint_rad) * [J]) }
+ {joint_sphere}
+ put { scale( middle_ratio * [J] + proximal_distal_ratio^2 * ([I]+[K]) ) }
+ {segment}
+}
+
+def distal_3 {
+ put { translate(joint_gap * joint_rad * [J])
+ then rotate(distal_3_rot, [I])
+ then translate((distal_len + joint_gap * joint_rad) * [J]) }
+ {segment}
+ put { rotate(distal_3_rot / 2, [I])
+ then translate((distal_len + joint_gap * joint_rad) * [J]) }
+ {joint_sphere}
+ put { scale( [J] + proximal_distal_ratio * ([I]+[K]) ) }
+ {segment}
+}
+
+def finger_3 {
+ put { translate(joint_gap * joint_rad * [J])
+ then rotate(middle_3_rot, [I])
+ then translate((middle_ratio * distal_len + joint_gap * joint_rad) * [J]) }
+ {distal_3}
+ put { scale(proximal_distal_ratio)
+ then rotate(middle_3_rot / 2, [I])
+ then translate((middle_ratio * distal_len + joint_gap * joint_rad) * [J]) }
+ {joint_sphere}
+ put { scale( middle_ratio * [J] + proximal_distal_ratio^2 * ([I]+[K]) ) }
+ {segment}
+}
+
+def distal_4 {
+ put { translate(joint_gap * joint_rad * [J])
+ then rotate(distal_4_rot, [I])
+ then translate((distal_len + joint_gap * joint_rad) * [J]) }
+ {segment}
+ put { rotate(distal_4_rot / 2, [I])
+ then translate((distal_len + joint_gap * joint_rad) * [J]) }
+ {joint_sphere}
+ put { scale( [J] + proximal_distal_ratio * ([I]+[K]) ) }
+ {segment}
+}
+
+def finger_4 {
+ put { translate(joint_gap * joint_rad * [J])
+ then rotate(middle_4_rot, [I])
+ then translate((middle_ratio * distal_len + joint_gap * joint_rad) * [J]) }
+ {distal_4}
+ put { scale(proximal_distal_ratio)
+ then rotate(middle_4_rot / 2, [I])
+ then translate((middle_ratio * distal_len + joint_gap * joint_rad) * [J]) }
+ {joint_sphere}
+ put { scale( middle_ratio * [J] + proximal_distal_ratio^2 * ([I]+[K]) ) }
+ {segment}
+}
+
+% points on the palm of the hand
+def proximal_0_loc (1.8,-5.5,0)
+def proximal_1_loc (1.8,.1,0)
+def proximal_2_loc (O)
+def proximal_3_loc (-1.8,-.2,0)
+def proximal_4_loc (-3.6,-.5,0)
+def h5 (proximal_4_loc) + [-.6,-.2]
+def h6 (h5) + [1,-5]
+def h8 (proximal_0_loc) + [.75,-.5]
+def h7 (h8) + [-.6,-.8]
+def h6a (h6) + .6 * ((h7) - (h6))
+def h9 (h8) + [-1.9,1]
+def h10 (proximal_1_loc) + [.85,-.3]
+
+def hand {
+
+ % thumb has an extra rotation for opposable-ness!
+ def opposition_rot rotate(-50, [J])
+ def thk_scale_0 1.2
+ put { scale([thk_scale_0,.9,thk_scale_0]) % this distorts a little; oh well
+ then translate((joint_gap * joint_rad) * [J])
+ then [[opposition_rot]]
+ then rotate(meta_0_rot, [I])
+ then rotate(-spread_rot_0, [K])
+ then translate((proximal_0_loc) - (O)) }
+ {finger_0}
+
+ put { scale(thk_scale_0 * proximal_distal_ratio^2)
+ then [[opposition_rot]]
+ then rotate(meta_0_rot / 2, [I])
+ then rotate(-spread_rot_0, [K])
+ then translate((proximal_0_loc) - (O)) }
+ {joint_sphere}
+
+ % index finger
+ def scale_1 .85
+ put { scale(scale_1)
+ then translate((joint_gap * joint_rad) * [J])
+ then rotate(meta_1_rot, [I])
+ then rotate(-spread_rot, [K])
+ then translate((proximal_1_loc) - (O)) }
+ {finger_1}
+
+ put { scale(scale_1 * proximal_distal_ratio^2)
+ then rotate(meta_1_rot / 2, [I])
+ then rotate(-spread_rot, [K])
+ then translate((proximal_1_loc) - (O)) }
+ {joint_sphere}
+
+ % middle finger
+ put { % no scale then
+ translate((joint_gap * joint_rad) * [J])
+ then rotate(meta_2_rot, [I])
+ % no spread rotation
+ then translate((proximal_2_loc) - (O)) }
+ {finger_2}
+
+ put { scale(proximal_distal_ratio^2)
+ then rotate(meta_2_rot / 2, [I])
+ then rotate(-spread_rot, [K])
+ then translate((proximal_2_loc) - (O)) }
+ {joint_sphere}
+
+ % ring finger
+ def scale_3 .85
+ put { scale(scale_3)
+ then translate((joint_gap * joint_rad) * [J])
+ then rotate(meta_3_rot, [I])
+ then rotate(spread_rot, [K])
+ then translate((proximal_3_loc) - (O)) }
+ {finger_3}
+
+ put { scale(scale_3 * proximal_distal_ratio^2)
+ then rotate(meta_3_rot / 2, [I])
+ then rotate(-spread_rot, [K])
+ then translate((proximal_3_loc) - (O)) }
+ {joint_sphere}
+
+ % little finger
+ def scale_4 .7
+ put { scale(scale_4)
+ then translate((joint_gap * joint_rad) * [J])
+ then rotate(meta_4_rot, [I])
+ then rotate(2 * spread_rot, [K])
+ then translate((proximal_4_loc) - (O)) }
+ {finger_4}
+
+ put { scale(scale_4 * proximal_distal_ratio^2)
+ then rotate(meta_4_rot / 2, [I])
+ then rotate(-spread_rot, [K])
+ then translate((proximal_4_loc) - (O)) }
+ {joint_sphere}
+
+ % palm is built by sweeping a polygon through a small
+ % angle in order to make it thicker at the wrist
+ put { translate(joint_gap * joint_rad * -[J]) } % drop polytope to expose knuckles
+ sweep { 1, rotate(6, (0,15,0), [I]) }
+ put { rotate(-3, (0,15,0), [I]) } {
+ % need two polygons for convexity; the desired shape is concave at the thumb
+ polygon(proximal_1_loc)(proximal_2_loc)(proximal_3_loc)(proximal_4_loc)
+ (h5)(h6)(h6a)(h9)(h10)
+ polygon(h6a)(h7)(h8)(h9)
+ }
+}
+
+% a few views
+def viewxf
+ <frontview> view((0,0,10))
+ <sideview> view((10,0,0))
+ <topview> view((0,10,0), (O), -[K])
+ <> view((4,3,10))
+
+% either a single copy or a repeat to show different angles
+def scene
+ <repeated>
+ put { [[viewxf]] then scale(.25) } {
+ def N 4
+ repeat { N, rotate(270/N, [3,2,1]), translate(14*[I]) } {hand}
+ }
+ <> put { [[viewxf]] then scale(.3) } {hand}
+
+{scene}
+
+global {
+ set [linewidth=.3pt]
+}
diff --git a/graphics/sketch/Data/test.sk b/graphics/sketch/Data/test.sk
new file mode 100644
index 0000000000..b28d7e7eec
--- /dev/null
+++ b/graphics/sketch/Data/test.sk
@@ -0,0 +1,84 @@
+# origin
+def O (0,0,0)
+
+def cube {
+ polygon[linecolor=blue,fillcolor=red]( 1,-1,-1)( 1, 1,-1)( 1, 1, 1)( 1,-1, 1)
+ polygon[linecolor=blue,fillcolor=green](-1,-1, 1)(-1, 1, 1)(-1, 1,-1)(-1,-1,-1)
+
+ polygon[linecolor=blue,fillcolor=blue](-1,-1,-1)( 1,-1,-1)( 1,-1, 1)(-1,-1, 1)
+ polygon[linecolor=blue,fillcolor=yellow](-1, 1, 1)( 1, 1, 1)( 1, 1,-1)(-1, 1,-1)
+
+ polygon[linecolor=blue,fillcolor=cyan](-1,-1, 1)( 1,-1, 1)( 1, 1, 1)(-1, 1, 1)
+ polygon[linecolor=blue,fillcolor=magenta](-1, 1,-1)( 1, 1,-1)( 1,-1,-1)(-1,-1,-1)
+}
+
+def rawcubes {
+ {cube}
+ put { translate([2.5,0,0]) } {cube}
+ put { translate([0,0,-2.5]) } {cube}
+ put { translate([0,0,2.5]) } {cube}
+ put { translate([-2.5,0,0]) } {cube}
+}
+
+def ofs -1.5
+#def ofs -2.1
+
+def cubeviews {
+ put { rotate(0, (O), [0,1,0]) then translate([0,0*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(5, (O), [0,1,0]) then translate([0,1*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(10, (O), [0,1,0]) then translate([0,2*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(15, (O), [0,1,0]) then translate([0,3*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(20, (O), [0,1,0]) then translate([0,4*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(25, (O), [0,1,0]) then translate([0,5*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(30, (O), [0,1,0]) then translate([0,6*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(35, (O), [0,1,0]) then translate([0,7*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(40, (O), [0,1,0]) then translate([0,8*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(45, (O), [0,1,0]) then translate([0,9*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(50, (O), [0,1,0]) then translate([0,10*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(55, (O), [0,1,0]) then translate([0,11*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(60, (O), [0,1,0]) then translate([0,12*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(65, (O), [0,1,0]) then translate([0,13*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(70, (O), [0,1,0]) then translate([0,14*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(75, (O), [0,1,0]) then translate([0,15*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(80, (O), [0,1,0]) then translate([0,16*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(85, (O), [0,1,0]) then translate([0,17*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+ put { rotate(90, (O), [0,1,0]) then translate([0,18*ofs,0]) then view((3, 5, 10), [-3, -5, -10]) then perspective(10) } {rawcubes}
+}
+
+def dstest {
+ def ts polygon (-1,-1,1)(1,-1,-1)(1,1,-1)(-1,1,1)
+ {ts}
+ def ofsv [.2,0,-.1]
+ put { translate( [ofsv] ) } {ts}
+ put { translate( 2*[ofsv] ) } {ts}
+ put { translate( 3*[ofsv] ) } {ts}
+ put { translate( 4*[ofsv] ) } {ts}
+ put { translate( 5*[ofsv] ) } {ts}
+}
+
+#put { view((10,2,10), [-1,-2,-5]) } {dstest}
+put { scale(1) } {cubeviews}
+
+def cross {
+ polygon[fillcolor=red] (-10,-1,-10)(10,-1,10)(10,1,10)(-10,1,-10)
+ polygon[fillcolor=blue] (-10,-1,10)(10,-1,-10)(10,1,-10)(-10,1,10)
+}
+
+# put { view( (0,5,10) ) then scale(.1) } {cross}
+
+def edgeon {
+ polygon[fillcolor=red] (0,0,1)(10,0,1)(10,0,-1)(0,0,-1)
+ polygon[fillcolor=blue](9,-1,-1.1)(11,-1,-1.1)(11,1,-1.1)(9,1,-1.1)
+}
+# put { view( (4,.1,10) ) then scale(.3) } {edgeon}
+
+def linepolyintersect {
+ polygon[fillcolor=red]( 1,-1,-1)( 1, 1,-1)( 1, 1, 1)( 1,-1, 1)
+ line[linewidth=1pt](0,0)(2,1,.5)
+ line[linewidth=1pt](0,0)(2,1,0)
+ line[linewidth=1pt](0,0)(2,-1,0)
+ line[linewidth=1pt](0,0)(3,2.99,0)
+}
+# put { view( (1, 1, 10) ) then scale(3) } {linepolyintersect}
+
+global { set [linewidth=0pt] }