About Store Forum Documentation Contact
Donations:
345$/mo



Post Reply 
Improved Terrain + Built-in Noise Generation
Author Message
Esenthel Offline
Administrator

Post: #1
Improved Terrain + Built-in Noise Generation
I've started playing around with programatic terrain generation, thanks to which I've implemented new Noise classes/functions, and did some importing sample heightmaps into World Editor.

I've noticed small artifacts on LOD caused by vertex normals being too rough, so I've improved LOD generation to include vtx normal softening.
On the left you can see old rough, and on the right, the softened version:
   

And now to the main event:
Let's see some beautiful heightmaps/terrain generated with the new functions.

Terrain below was generated with the raw functions, you can achieve much better results by mixing the noise functions together.
(I've created the heightmaps in a sample C++ program, saved as IMAGE_F32 PNG, and then imported those images to the World Editor).
   
   
   
   
   
   
   
09-08-2016 09:24 AM
Find all posts by this user Quote this message in a reply
Esenthel Offline
Administrator

Post: #2
RE: Improved Terrain + Built-in Noise Generation
Heightmaps:
   
   
   
   
09-08-2016 09:26 AM
Find all posts by this user Quote this message in a reply
LDA Offline
Member

Post: #3
RE: Improved Terrain + Built-in Noise Generation
Looks nice, Greg smile
09-13-2016 11:33 AM
Find all posts by this user Quote this message in a reply
Pherael Offline
Silver Supporter

Post: #4
RE: Improved Terrain + Built-in Noise Generation
How to use noise generator in engine? I couldn't find any tutorial, and I'm kinda confused how to use it. Esenthel, could you post some sample code?
05-01-2019 04:42 PM
Find all posts by this user Quote this message in a reply
SamNainocard Offline
Member

Post: #5
RE: Improved Terrain + Built-in Noise Generation
I think it's Image in the Brush Parameter?
05-02-2019 04:30 AM
Find all posts by this user Quote this message in a reply
Esenthel Offline
Administrator

Post: #6
RE: Improved Terrain + Built-in Noise Generation
this tutorial will be included in the next release:
Code:
/******************************************************************************/
flt Scale=4;
int Res=256, Octaves=1, TransFunc=0;
uint Seed=0;
Image image;
/******************************************************************************/
void SetNoise()
{
   image.create2D(Res, Res, IMAGE_L8, 1);
   if(image.lock())
   {
      SimplexNoise noise=Seed; // initialize with custom seed
      Vec2 mul=Scale/(image.size()-1);
      flt (*transform)(flt noise); // pointer to a transform function
      switch(TransFunc)
      {
         default: transform=null; break;
         case  1: transform=NoiseMountain; break;
         case  2: transform=NoiseOrganic; break;
         case  3: transform=NoiseElectric; break;
         case  4: transform=NoiseAbsSqr; break;
         case  5: transform=NoiseCbrt; break;
         case  6: transform=NoiseSqrt; break;
         case  7: transform=NoiseSqr; break;
         case  8: transform=NoiseCube; break;
      }
      REPD(x, image.w())
      REPD(y, image.h())
      {
         flt n=noise.noise2(x*mul.x, y*mul.y, Octaves, 0.5, transform); // get 2-dimensional noise
         image.pixelF(x, y, n*0.5+0.5);
      }
      image.unlock();
   }
}
void SetRes      (int  res      ) {Clamp(res    , 16 , 2048); if(Res      !=res      ){Res      =res      ; SetNoise();}}
void SetSeed     (uint seed     ) {                           if(Seed     !=seed     ){Seed     =seed     ; SetNoise();}}
void SetOctaves  (int  octaves  ) {Clamp(octaves, 1    ,  8); if(Octaves  !=octaves  ){Octaves  =octaves  ; SetNoise();}}
void SetScale    (flt  scale    ) {Clamp(scale  , 1.0/4, 64); if(Scale    !=scale    ){Scale    =scale    ; SetNoise();}}
void SetTransform(int  transform) {Clamp(transform  , 0 , 8); if(TransFunc!=transform){TransFunc=transform; SetNoise();}}
/******************************************************************************/
void InitPre()
{
   EE_INIT();
   App.flag=APP_MINIMIZABLE|APP_MAXIMIZABLE|APP_RESIZABLE;
}
/******************************************************************************/
bool Init()
{
   SetNoise();
   return true;
}
/******************************************************************************/
void Shut()
{
}
/******************************************************************************/
bool Update()
{
   if(Kb.bp(KB_ESC))return false;
   switch(Kb.k.k)
   {
      case KB_1    : SetTransform(0); break;
      case KB_2    : SetTransform(1); break;
      case KB_3    : SetTransform(2); break;
      case KB_4    : SetTransform(3); break;
      case KB_5    : SetTransform(4); break;
      case KB_6    : SetTransform(5); break;
      case KB_7    : SetTransform(6); break;
      case KB_8    : SetTransform(7); break;
      case KB_9    : SetTransform(8); break;
      case KB_LEFT : SetRes(Res/2); break;
      case KB_RIGHT: SetRes(Res*2); break;
      case KB_UP   : SetScale(Scale*1.2); break;
      case KB_DOWN : SetScale(Scale/1.2); break;
      case KB_PGUP : SetSeed(Seed+1); break;
      case KB_PGDN : SetSeed(Seed-1); break;
      case KB_HOME : SetOctaves(Octaves+1); break;
      case KB_END  : SetOctaves(Octaves-1); break;
   }
   return true;
}
/******************************************************************************/
void Draw()
{
   D.clear();
   image.drawFs();
   D.text(0, -0.5, S+"Press 1..9 to change transform function: "+TransFunc);
   D.text(0, -0.6, S+"Press Left/Right to change resolution: "+Res);
   D.text(0, -0.7, S+"Press Up/Down to change scale: "+Scale);
   D.text(0, -0.8, S+"Press PgUp/PgDn to change seed: "+Seed);
   D.text(0, -0.9, S+"Press Home/End to change Octaves: "+Octaves);
}
/******************************************************************************/
05-02-2019 04:42 AM
Find all posts by this user Quote this message in a reply
Pherael Offline
Silver Supporter

Post: #7
RE: Improved Terrain + Built-in Noise Generation
Thank you smile
05-02-2019 11:27 AM
Find all posts by this user Quote this message in a reply
Post Reply