RandomTerrain

int cols;
int rows;
int scale;
int h = 3000;
int w = 2000;
float[][] terrain;

float flying= -7; //Determines move speed (use positive values to move backwards)
float roughness = 150; //Determines gradient of randomness
float peak = -1; //Determines height of terrain peaks (use values 0<peak<1 to lower)


void setup(){
  size(1000, 1000, P3D);
  translate(width/2, height/2);

  scale = 20;
  cols = w/scale;
  rows = h/scale;



}


void draw(){
  if (flying > 0){
    flying += .05;
  }
  else if (flying < 0){
    flying -= .05;
  }
  lights();


  terrain = new float [cols][rows];
  float yOff =  flying;
  for(int y=0; y<rows; y++){
    float xOff = 0;
    for(int x=0; x<cols; x++){
    terrain[x][y] = map(noise(xOff, yOff), 0, 1, -roughness, roughness)*peak;
    xOff += .1;
  }
  yOff += .1;
  }


  background(0);

  translate(width/2, height/2);
  rotateX(PI/3);
  translate(-width/2 - 300, -height/2);

  for(int y=0; y<rows - 1; y++){
    beginShape(TRIANGLE_STRIP);
  for(int x=0; x<cols; x++){
      //noFill();
      //stroke(255);

      fill(55);
      noStroke();
      vertex(x*scale, y*scale, terrain[x][y]);
      vertex(x*scale, (y+1)*scale, terrain[x][y+1]);


    }
    endShape();
  }



}