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Author Topic: Surface area or Spline?  (Read 791 times)

dylan86.exe

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Surface area or Spline?
« on: May 16, 2017, 02:59:17 AM »
Hello,

Could someone clarify what I should be doing. How do I get paths to follow the ground geometry when using splines? At the moment, they just stay flat and don't follow hills or dips..

« Last Edit: May 16, 2017, 07:25:13 AM by dylan86.exe »

Michal Karmazín

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Re: Surface area or Spline?
« Reply #1 on: May 16, 2017, 11:38:51 AM »
Hi,

Adding that surface to the Forest object under the Surface tab > Add surface will do the trick. For these purposes the Areas - Surface Area should be turned OFF. As described in our on-line reference guide:

"Surfaces are often used to define the scattered item's position on the Z axis in conjunction with splines and paint areas to define the region on the X and Y axes. Occasionally you may find that the full terrain is filled with items,even though there are spline areas in the Items List. If this is the case the usual problem is because the Area is on, when using surfaces with other Include areas it is important to turn the Surface off."


Hope that helps.

Best regards,

dylan86.exe

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Re: Surface area or Spline?
« Reply #2 on: May 17, 2017, 01:21:28 AM »
Hi,

Adding that surface to the Forest object under the Surface tab > Add surface will do the trick. For these purposes the Areas - Surface Area should be turned OFF. As described in our on-line reference guide:

"Surfaces are often used to define the scattered item's position on the Z axis in conjunction with splines and paint areas to define the region on the X and Y axes. Occasionally you may find that the full terrain is filled with items,even though there are spline areas in the Items List. If this is the case the usual problem is because the Area is on, when using surfaces with other Include areas it is important to turn the Surface off."


Hope that helps.

Best regards,

So to clarify, I should use a spline, draw my path then add the surface area of the geometry and turn it off? So it has something to get co-ordinates from.

Also, while I remember to ask - when I'm using a preset library of grass (that consists of three clumps alsready), can I add other types of grass to that library? Because when I hit the library button and load in say a small daisy type plant or something, it removes the original library and just loads in the Daisy instead of adding to it..
« Last Edit: May 17, 2017, 02:55:23 AM by dylan86.exe »

Michal Karmazín

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Re: Surface area or Spline?
« Reply #3 on: May 17, 2017, 09:50:48 AM »
Hi,
Quote
"I should use a spline, draw my path then add the surface area of the geometry and turn it off?"
Exactly, this way, such surface will be used just for getting the correct position for items in the Spline Area.
Quote
"... when I hit the library button and load in say a small daisy type plant or something, it removes the original library and just loads in the Daisy instead of adding to it."
Importing any library will replace the current Forest object settings by stored ones (as besides of used geometry presets store all other Forest's data to reconstruct the distribution in the same way as saved).

You should create another Forest object and adjust these to complement each other or to add just wanted geometry to the existing object use the Geometry > Add New Item / Add Multiple Custom Objects option. All objects imported from libraries you can find all these under "forest_templates" layer. By default all objects inside of this layer are hidden and frozen. The object name will be _forest_library_*******. Any of these objects can be manipulated like any other 3ds Max's object - moved to other layer, copied etc.

Hope that helps.

Best regards,

dylan86.exe

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Re: Surface area or Spline?
« Reply #4 on: May 18, 2017, 01:40:22 AM »
Thank you Michal!  :)