Can someone help me with the cga code to convert a line into a tunnel in CityEngine?
Here's a simple one I made. You could use some recursion to make smooth arcs, but I try to keep the poly count low. Only works on straight lines, unfortunately. Change the nodes to crossings.
version <SPAN class="string token">"2016.0"</SPAN> attr shapeType <SPAN class="operator token">=</SPAN><SPAN class="string token">""</SPAN> attr streetWidth <SPAN class="operator token">=</SPAN> <SPAN class="number token">0</SPAN> attr sidewalkWidthLeft <SPAN class="operator token">=</SPAN> <SPAN class="number token">0</SPAN> attr sidewalkWidthRight <SPAN class="operator token">=</SPAN> <SPAN class="number token">0</SPAN> <SPAN class="keyword token">import</SPAN> EsriStreets<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"/ESRI.lib/rules/Streets/Street_Modern_Standard.cga"</SPAN> @StartRule Lot <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> case shapeType <SPAN class="operator token">==</SPAN> <SPAN class="string token">"Street"</SPAN><SPAN class="punctuation token">:</SPAN> MakeTunnel EsriStreets<SPAN class="punctuation token">.</SPAN>Street case shapeType <SPAN class="operator token">==</SPAN> <SPAN class="string token">"Sidewalk"</SPAN><SPAN class="punctuation token">:</SPAN> EsriStreets<SPAN class="punctuation token">.</SPAN>Sidewalk <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>NIL MakeTunnel <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> extrude<SPAN class="punctuation token">(</SPAN>streetWidth<SPAN class="operator token">/</SPAN><SPAN class="number token">1.2</SPAN><SPAN class="punctuation token">)</SPAN> alignScopeToGeometry<SPAN class="punctuation token">(</SPAN>zUp<SPAN class="punctuation token">,</SPAN> any<SPAN class="punctuation token">,</SPAN> world<SPAN class="punctuation token">.</SPAN>lowest<SPAN class="punctuation token">)</SPAN> s<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'1,streetWidth+sidewalkWidthLeft+sidewalkWidthRight+2,'</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">)</SPAN> t<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN><SPAN class="operator token">*</SPAN><SPAN class="punctuation token">(</SPAN>sidewalkWidthLeft<SPAN class="operator token">/</SPAN><SPAN class="number token">2</SPAN><SPAN class="operator token">+</SPAN>sidewalkWidthRight<SPAN class="operator token">/</SPAN><SPAN class="number token">2</SPAN><SPAN class="operator token">+</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> color<SPAN class="punctuation token">(</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> rotateScope<SPAN class="punctuation token">(</SPAN><SPAN class="number token">45</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> split<SPAN class="punctuation token">(</SPAN>y<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> NIL <SPAN class="operator token">|</SPAN> <SPAN class="operator token">~</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> OuterSplit1 <SPAN class="punctuation token">}</SPAN> OuterSplit1 <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> rotateScope<SPAN class="punctuation token">(</SPAN><SPAN class="number token">90</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> split<SPAN class="punctuation token">(</SPAN>y<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> NIL <SPAN class="operator token">|</SPAN> <SPAN class="operator token">~</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> InnerSplit1<SPAN class="punctuation token">}</SPAN> InnerSplit1 <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> color<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> rotateScope<SPAN class="punctuation token">(</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">45</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> split<SPAN class="punctuation token">(</SPAN>y<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> Wall <SPAN class="operator token">|</SPAN> <SPAN class="operator token">~</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> InnerSplit2<SPAN class="punctuation token">}</SPAN> InnerSplit2 <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> color<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> rotateScope<SPAN class="punctuation token">(</SPAN><SPAN class="number token">90</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> split<SPAN class="punctuation token">(</SPAN>y<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> Wall <SPAN class="operator token">|</SPAN> <SPAN class="operator token">~</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> InnerSplit3 <SPAN class="operator token">|</SPAN> <SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> Wall<SPAN class="punctuation token">}</SPAN> InnerSplit3 <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> rotateScope<SPAN class="punctuation token">(</SPAN><SPAN class="number token">225</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> split<SPAN class="punctuation token">(</SPAN>y<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> Wall <SPAN class="operator token">|</SPAN> <SPAN class="operator token">~</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> InnerSplit4 <SPAN class="punctuation token">}</SPAN> InnerSplit4 <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> rotateScope<SPAN class="punctuation token">(</SPAN><SPAN class="number token">90</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> split<SPAN class="punctuation token">(</SPAN>y<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> Wall <SPAN class="operator token">|</SPAN> <SPAN class="operator token">~</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">:</SPAN> NIL <SPAN class="punctuation token">}</SPAN> Wall <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> color<SPAN class="punctuation token">(</SPAN>"<SPAN class="comment token">#BBBBBB")</SPAN><SPAN class="line-numbers-rows"><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN></SPAN>
LR, much appreciated. Apologies! Did not make myself clear enough. I was looking for a railway tunnel - cylindrical in nature.
Here's a basic approach for a hollow cylinder - I insert a disc, move/extrude it and then delete the center. Again, straight lines only.
version <SPAN class="string token">"2016.0"</SPAN> attr shapeType <SPAN class="operator token">=</SPAN><SPAN class="string token">""</SPAN> attr TunnelLength <SPAN class="operator token">=</SPAN> <SPAN class="number token">0</SPAN> @StartRule Lot <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> case shapeType <SPAN class="operator token">==</SPAN> <SPAN class="string token">"Street"</SPAN><SPAN class="punctuation token">:</SPAN> MakeTunnel <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>NIL MakeTunnel <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> set<SPAN class="punctuation token">(</SPAN>TunnelLength<SPAN class="punctuation token">,</SPAN> scope<SPAN class="punctuation token">.</SPAN>sx<SPAN class="punctuation token">)</SPAN> alignScopeToGeometry<SPAN class="punctuation token">(</SPAN>zUp<SPAN class="punctuation token">,</SPAN> any<SPAN class="punctuation token">,</SPAN> world<SPAN class="punctuation token">.</SPAN>lowest<SPAN class="punctuation token">)</SPAN> primitiveDisk<SPAN class="punctuation token">(</SPAN><SPAN class="number token">20</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">5</SPAN><SPAN class="punctuation token">)</SPAN> center<SPAN class="punctuation token">(</SPAN>xyz<SPAN class="punctuation token">)</SPAN> r<SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">90</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> t<SPAN class="punctuation token">(</SPAN><SPAN class="operator token">-</SPAN>scope<SPAN class="punctuation token">.</SPAN>sx<SPAN class="operator token">/</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="operator token">-</SPAN>TunnelLength<SPAN class="operator token">/</SPAN><SPAN class="number token">2</SPAN><SPAN class="punctuation token">)</SPAN> extrude<SPAN class="punctuation token">(</SPAN>TunnelLength<SPAN class="punctuation token">)</SPAN> setback<SPAN class="punctuation token">(</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>all<SPAN class="punctuation token">:</SPAN> TunnelColor <SPAN class="operator token">|</SPAN> remainder<SPAN class="punctuation token">:</SPAN> NIL<SPAN class="punctuation token">}</SPAN> TunnelColor <SPAN class="operator token">-</SPAN><SPAN class="operator token">-</SPAN><SPAN class="operator token">></SPAN> color<SPAN class="punctuation token">(</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="line-numbers-rows"><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN></SPAN>
Thanks Ivan,
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