Erosion

import controlP5.*;

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//erosion constants

public float uplift = .06;

public float erodability = .1;

public float area_exponent = .5;

public float slope_exponent = 1;

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//map generation

int t_size = 50;

float boxBase = 10;

float speed = .003;

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//METHODS

public int color_method = 1; //1 = height, 2 = area, 3 = slope, 4 = rgb

public int routing_method = 1; //1 = steepest descent, 2 = distributed

public int side_method = 1; //1 = zero height, 2 = zero slope, 3 = wrap around

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//control variables

public float noise_detail = .04;

public float noise_scale = 10;

public float global_slope = .01;

public int land = t_size;

public boolean eroding = false;

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int len = t_size * t_size;

float max_height = 1;

float min_height = 0;

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//viewing

public boolean spin = false;

public float zoom = -700;

public float angle = PI /4;

public float tilt = -PI /4;

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//time

float t_frame;

float t_old;

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//data

boolean[] key_array = new boolean[256];

zone[][] landscape;

spot[] sorted_spots;

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//GUI

ControlP5 controlP5;

PGraphics cp5;

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void setup()

{

  size (800, 400, P3D);

  noStroke();

  background(53, 117, 250);

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  landscape = new zone[500][500];

  sorted_spots = new spot[250000];

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    //GUI

  create_gui();

  generate();

}

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void draw()

{

  float h;

  float xd = boxBase * t_size / 2;

  float yd = boxBase * t_size / 2;

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  //GUI fix

  background(0);

  beginRecord(cp5);

  controlP5.draw();

  endRecord();

  fill(100);

  background(129);

  image(cp5, 0, 0);

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  //camera

  control_camera();

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  pushMatrix();

  translate(width/2 -400 * zoom/1600, height/2, zoom);

  rotateX(tilt);

  rotateY(angle);

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  //drawing landscape

  beginShape(QUADS);

  for (int x = 0; x < t_size - 1 ; x++) {

    for (int y = 0; y < t_size -1; y++) {

​

      landscape[x][y].set_color(); 

      vertex(boxBase * (x + 0) -xd, -boxBase * landscape[x+0][y+0].z, boxBase * (y + 0) - yd);

      //set_color(height_map[x][y+1]);

      vertex(boxBase * (x + 0) -xd, -boxBase *  landscape[x+0][y+1].z, boxBase * (y + 1) - yd);

      //set_color(height_map[x+1][y+1]);

      vertex(boxBase * (x + 1) -xd, -boxBase *  landscape[x+1][y+1].z, boxBase * (y + 1) - yd);

      //set_color(height_map[x+1][y]);

      vertex(boxBase * (x + 1) -xd, -boxBase *  landscape[x+1][y+0].z, boxBase * (y + 0) - yd);

    }

  }

​

  //drawing base

  fill(200, 200, 200);

  vertex(-xd, 0, - yd);

  vertex(-xd, 0, + yd);

  vertex(+xd, 0, + yd);

  vertex(+xd, 0, - yd);

  endShape();

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  //timing

  t_frame = millis() - t_old;

  t_old = millis();

  popMatrix();

  println("bound: " + side_method);

  if (eroding) erode_all(true);

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}

​

​