Java-Gaming.org    
Featured games (81)
games approved by the League of Dukes
Games in Showcase (498)
Games in Android Showcase (114)
games submitted by our members
Games in WIP (563)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  Generating Forest  (Read 778 times)
0 Members and 1 Guest are viewing this topic.
Offline Gudradain
« Posted 2011-05-19 01:56:31 »

Hello,

I'm trying to generate a realistic forest for a RTS like game. But I would need some tip about how to do it.

My guess is that I need to use Perlin Noise as it seems to do pretty much what I want to do. The problem is that I don't understand how to pass from a function like the one showed in this thread (Perlin Noise by DzzD) to a sort of array[][] containing value to indicate where to place my trees.
Offline m77

« In padded room »

« Reply #1 - Posted 2011-05-19 03:48:59 »

u can calculate position of each next tree by algorithm like this:
void placeTree() {
  x = random.nextDouble()*mapWidth;
  y = random.nextDouble()*mapHeight;
  double dist = distanceTillTheClosestTree()
  if (dist < minDist) {
    placeTree();
  } else if (random.nextDouble()*k > dist) {
    placeTree();
  }
}
Offline lhkbob

JGO Knight


Medals: 32



« Reply #2 - Posted 2011-05-19 06:12:41 »

Perlin noise is the generally a good way to place trees.  Often, they increase the contrast of the noise image by picking a threshold value.  All points above that are moved to 1 and all below are at 0. Alternatively you can go more detailed and pick a couple of thresholds to create bands.  Within each of these bands you have a tree density and you place trees to fill up the density.

One way of doing that is by splitting up the map into a grid maybe large enough to hold 3-5 trees max.  Then when randomly placing trees in a band, you figure out approximately how many trees go in each grid, and use random() to place them within the grid.  This should give you a more even density in the band while giving the appearance of randomness. 

There might be smarter tree placement algorithms though.

Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

BurntPizza (20 views)
2014-09-21 02:42:18

BurntPizza (14 views)
2014-09-21 01:30:30

moogie (14 views)
2014-09-21 00:26:15

UprightPath (25 views)
2014-09-20 20:14:06

BurntPizza (27 views)
2014-09-19 03:14:18

Dwinin (42 views)
2014-09-12 09:08:26

Norakomi (73 views)
2014-09-10 13:57:51

TehJavaDev (97 views)
2014-09-10 06:39:09

Tekkerue (49 views)
2014-09-09 02:24:56

mitcheeb (70 views)
2014-09-08 06:06:29
List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17

Resources for WIP games
by CogWheelz
2014-08-01 16:19:50

List of Learning Resources
by SilverTiger
2014-07-31 16:29:50

List of Learning Resources
by SilverTiger
2014-07-31 16:26:06

List of Learning Resources
by SilverTiger
2014-07-31 11:54:12

HotSpot Options
by dleskov
2014-07-08 01:59:08
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!