“Mountain Landscape Generator” by Studio Abby
https://openprocessing.org/sketch/1949838
License CreativeCommons Attribution NonCommercial ShareAlike
https://creativecommons.org/licenses/by-nc-sa/3.0
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CC Attribution NonCommercial ShareAlike
Mountain Landscape Generator
Abby
xxxxxxxxxx
/* based on the 'simple mountain' code of Nellie Robinson (narobins) */
float[] pts;
int n;
int len;
float roughness;
int num_layers = 7;
void setup() {
size(1200, 700);
n = 7;
len = int(pow(2, n));
noLoop();
noStroke();
}
float calcError(float n) {
return random(-roughness, roughness) * n;
}
void draw() {
background(255);
roughness = 0.02;
pts = new float[len + 1];
for (int i = num_layers; i > 0; i--) {
pts[0] = (height - 100)/pow(2, i) + 25;
pts[len] = (height - 100)/pow(2, i) + 25;
fill(40 * i);
fillarray();
display();
roughness *= 2.5;
}
}
void fillarray() {
for (int i = 0; i < n; i++) {
int inc = len / int(pow(2, i));
int start = 0;
int next = start + inc;
while(next <= len) {
pts[(start + next) / 2] = calcError(inc) + (pts[start] + pts[next]) / 2;
start = next;
next += inc;
}
}
}
//draws layers back to front
void display() {
float inc = width/float(len);
beginShape();
vertex(0, pts[0]);
for (int i = 0; i < len + 1; i++) {
curveVertex(i*inc, pts[i]);
}
vertex(width, pts[len]);
vertex(width, height);
vertex(0, height);
endShape(CLOSE);
}
void mousePressed() {
redraw();
}
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