USER GUIDE FOR ROAD TOOLS OTLS
Contents
1. el of the normal path trasformed on to terrain using Ray OP TOr cunnel IT is controlled by Controls asset For Road Full Path Enables the full path when checked on Al ther parameters except Colour will be greyed out It is useful for laying the full road Enables color values of every point when checked on Road Asset This asset generates road on the given path Note Path Calculations in the full path generation mode should be connected as input PARAMETERS Road Thickness Thickness of the road Road Offset Offsets the road along Y axis Detail Resamples the road to increase the detail on it Keep Texture Keeps the texture when checked on Detailed Bridge Asset This asset creates a small or a large bridge based on the perimeter of input path Figll Large Bridge Figl2 Small Bridge Note Path Calculations in the bridge generation mode should be connected as input PARAMETERS Size Limit Limit for the perimeter of the primitive Primitives with perimeter lesser than this will have smaller bridges and vice versa Choice to have towers at centre or at beginning and end of bridge also This works only on large bridges For small bridges there will be no towers Bottom Bottom Height Height or depth of the bottom part of the bridge both small and large Cable Value to control the curvature of the Curvature bottom part of the bridge both small and2. large Vertical Number of vertical cables along the Cables bottom part both small and large Bridge Supp Radius of the bridge support both Radius small and large Top Top Height Height of the top part of the large bridge Cable Value to control the curvature of the Curvature top part of the bridge large Vert Number of vertical cables per side Cables Large along the top part large bridge Vert Number of vertical cables along the Cables Small top part small bridge Small Bridge Height of the top part of Height bridge Number of Number of braces large bridge Braces Tunnel Asset This asset generates tunnel on the given path Fig13 Tunnel Note Path Calculations in the tunnel generation mode should be connected as input PARAMETERS Tunnel Offsets the tunnel along Y axis Offset Tunnel Height of the tunnel Height Uniform size of the tunnel Level Terrain Asset This asset levels the terrain and generates tunnels On dla Figl4 Wireframe mode of Figl5 Wireframe mode showing Input Terrain levelled area and generation of tunnels INPUT OUTPUT Note Tunnel should be connected to the first input terrain to the second and path calculations in the level path generation mode should be connected to the third input PARAMETERS The percentage of polygons to keep This is with respect to the triangulated mesh Stiffen Border Without any constraints
3. the edges of planar surfaces can erode This controls a bias which penalizes such erosion Attrib Weight This bias uses the point attribute weight to control the polygon reduction Points with a larger weight value will be more resistant to collapse and better preserve the original surface geometry Detail Level of detail on the terrain Level Span width Width of the level span Detail Level span Detail on the profile used for levelling Keep Texture Keeps the texture when checked on xProcedural Texture asset This asset sweeps skins the given profile on to the given path and textures it Example Figlo input Path Figl 7 Input Profile Figle Output Note Profile curve should be connected to the first input and path curve should be connected to the second input PARAMETERS Texture Element Choice for the element to be texture They include road c me Cables TOwers braces bridgesupport The name has to be entered precisely for respective textures Help provided on the parameters menu for precise names Keep Texture Keeps the texture when checked on
4. USER GUIDE FOR ROAD TOOLS OTLS Input_Terrain HEB terrain WE il Path HOMER controls TonnelPath EEEH path Calculations2 HUGE pathCalculations3 ls adl HEB tunnell e p athCalculations4 MESH detailedBridgel 2 J evelterraini NETWORK CONNECTIONS OF THE ROAD TOOLS OTLS FOR THE COMPLETE SETUP NOTE All the assets are saved under RoadTools otl file In order to install this digital asset click on File gt Install Digital Asset Library in a new Houdini scene Give the path of the otl file and follow the above depicted connections Key points about input path curve If the user wants his own path for the generation of bridges and tunnels then the following steps have to be followed In the networks view Click on tab and type curve Draw the curve and change its interpolation to Nurbs Important points for a good input curve for better results Please draw the curve on to the grid XY plane Give more number of Control vertices ArlLer the curve 1s drawn modify each point individually Make a gradual increase of y position of every point and then gradual decrease say about for 6 points leave the next point unmodified and then make a gradual decrease of y position of every point and then gradual increase say about for 6 more points and then leave the next point unmodified Repeat this process until the end of the curve in order to avoid abrupt highs or lows in the road path The above path ensures that
5. a second offset value and check on keep outside parameter and uncheck keep inside parameter Inside part is used for generation of bridge or tunnel Value between 3 and 4 would be an ideal value Keep small and large primitives PLO Calculated area ror Pigu Wireframe mode showing levelling of the input curve level area on terrain Note In this mode Controls asset should be connected to the first input and Terrain asset should be connected to the second input The output should be connected to the LevelTerrain asset PARAMETERS Select Area Select the area for bridge tunnel or both helpful for levelling Level area Mandatory area to be levelled This snoula not be mistaken FOr the complete level area The user can select some more area to be levelled based on his needs Offsets First Offset second Offset Toggle Second Offset Keep Inside Keep Outside Small Primitives Large Primitives For Bridge Note Offsets the terrain This parameter is controlled by Controls asset Enables the second offset when checked on Offsets individ al primitives of selected area from both sides Doesn t work on primitives whose perimeter lesser than size range and level area Keeps inside part of the second offset area Keeps outside part of the second OESO area Primitives whose perimeter lesser than this are considered as small primitives and vice versa This parameter is con
6. ater than this will be partitioned ONCS Extra Range Extra Range for arc length of the primitives only bridge area Primitives whose are length greater than sum of Extra tange and Divide once range will be partitioned twice Del Supp Low Number of primitives to be deleted er from Del Supp Higher for bridge SUDPDOL US HeightThres Threshold TOT the minimum height Tunnel between normal path and mountain path points Of the normal path transformed on to terrain using Ray SOP for tunnel HeightThres Threshold LOL the minimum height Bridge between normal path and mountain path points OT the normal path transformed on to terrain using Ray SOP for bridge Note Input Curve should be connected to the first input and Terrain asset should be connected to the second input Path Calculations Asset By uSing this asset the user can calculate different sets of paths for different road elements bridges tunnels levelled area for normal road This is a multipurpose asset This asset has to be used 4 times in 4 different modes in order to create the complete set up WARNING This SOP needs the Controls asset to be connected to the first inp t Controls asset plays a key role Imn Coneroliing the important parameters of this asset USAGE This asset has to be used 4 times in 4 different modes in order to create the complete set up Note Important parameters which should be maintained same in all t
7. e In this mode parameters belong to the tunnel area will be greyed out Controls asset should be connected to the first input and Terrain asset should be connected to the second input The output should be connected to the Detailed Bridge asset 3 Tunnel Path Generation In order to generate the tunnel path the procedure mentioned below should be followed Uncheck full path parameter as it is checked by default Uncheck colour parameter Select Tunnel area Uncheck Level Area Check on Second Offset Give a second offset value and check on keep inside parameter and uncheck keep outside parameter Outside part is used for levelling Keep only large primitives Fig Calculated area for tunnels Fig8 Tunnels generated on the for the input curve calculated path Note In this mode parameters belong to the bridge area will be greyed out Controls asset should be connected to the first input and Terrain asset should be connected to the second input The output should be connected to the Tunnel asset 4 Level Path Generation In order to generate the path to level the procedure mentioned below should be followed Uncheck full path parameter as it is checked by default Uncheck colour parameter Select both the areas Both from the drop down menu of Select Area parameter as levelling should be done for both the areas Check on Level Area Check on Second Offset Give
8. he 4 modes are controlled using Controls asset They Ine Luce x Test OFFSET Size Range Divide Once Range Divide Twice Range 2 Del upp Lower Del Upp Higher Height Threshold Bridge Height Threshold Tunnel Inputs Figl Input Pach Fig2 Input Terrain 1 Full Path Generation In order to generate the full path check on the parameters full path and colour Colour should be checked on because Road asset needs colour information for calculations All other parameters will be greyed out indicating that they won t work in this mode Note In this mode Controls asset should be connected to the first input and Terrain asset should be connected to the second input The output should be connected to the Road assel Figs Full calculated path Fig4 Road generated on generated for the input curve Galculated patch 2 Bridge Path Generation In order to generate the bridge path the procedure mentioned below should be followed Uncheck full path parameter as it is checked by default Uncheck colour parameter Select Bridge area Uncheck Level Area Check On Second OTrseu Give a second offset value and check on keep inside parameter and uncheck keep outside parameter Outside part is used for levelling Keep only large primitives Check on bridge support parameter Fig5 Calculated area for bridges Figo Bridges generated on the calculated path Not
9. the road follows good curvature Several input curves have been provided as examples in the scene file for the generation of bridges and tunnels At present the system has only one problem 1 e when the curve has curvature with around 90 degrees angle may occur because of division of bridge path it is unable to level the area properly due to overlap of the level profile If any of the curves given by the user has that problem then please modify the curve It happens only in rare cases Please see curves provided in the file for reference Terrain Asset This asset generates terrain PARAMETERS Size of the terrain Terrain Center of the terrain Center Detail Y Number of tunnels Controls Asset Important parameters of Path Calculations asset which should be maintained same in all the modes of road element generation are controlled by using this asset This helps in scaling the input curve to the size of terrain PARAMETERS For Input Curve Scales the Y size of the input curve scale Percentage of scale of X Z sizes of Percent X Z the input curve asset For Path Calculations First Offset Offsets the terrain Size Range Range FOr the perimeter O the primitives Primitives whose perimeter lesser than this will be considered as small Primitives and vice versa Divide Once Range for the arc length of the Range primitives only bridge area Primitives whose arc length gre
10. trolled by Controls assets Enables only small primitives when CNeCKEG On Enables only large primitives when checked on This section is disabled when the tunnel mode or path mode is selected PALL Bridge Enables bridge support when checked support eae Divide Range for the arc length of the Range primitives only bridge area Primitives whose are length greater than this will be partitioned once This parameter is controlled by COncro Ls asset Divide Range for the arc length of the Range primitives only bridge area This is the sum of Divide Once Range and Extra Range parameter OL Controls Primitives whose arc length greater than this will be partitioned twice This parameter is controlled by CONT COLS assets Number of primitives to be deleted from Del Supp Higher for bridge SUppOrts It 19 controlled by Controls asset Upper Range for bridge supports For every Del Supp Higher primitives Del SUPP Lower number Of primitives will be deleted It is the sum of Del Supp Lower andl Height Threshold for minimum height between Threshold Brid normal path and mountain path points ge of the normal path transformed on to terrain using Ray SOP for bridge It 1s controlled by Controls asset For Tunnel Note This section is disabled when the bridge mode or Cak path mode is selected Height Threshold for minimum height between Threshold Tunn normal path and mountain path points
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