Getting a static L system to grow in real time

Programming Questions

retina_ma..

Getting a static L system to grow in real time

in Programming Questions • 1 year ago

hi there would any one know how i can make this l system grow in real time?

import toxi.geom.*;

import peasy.*;

PeasyCam cam;

branch arm;

ArrayList <branch> allArms;

void setup (){

size (600,600, P3D);

smooth();

allArms = new ArrayList <branch>();

cam = new PeasyCam(this, 100);

Vec3D v = new Vec3D (0,0,0);

Vec3D inivel = new Vec3D (100,0,0);

arm = new branch(v, inivel, 6,"A");

allArms. add(arm);

}

void draw() {

background(255);

fill(227,53,53);

stroke(80);

sphere(100);

for (branch b: allArms){

b.run();

}

class branch {

Vec3D loc;

Vec3D oriLoc;

Vec3D vel;

int generations;

String type;

branch(Vec3D _loc, Vec3D _vel, int _generations, String _type){

loc =_loc;

oriLoc = loc.copy();

vel = _vel;

generations = _generations;

type= _type;

updateDir();

updateLoc();

spawn();

}

void run (){

Display();

}

void spawn(){

if (generations > 0) {

if (type == "A") {

Vec3D v = loc. copy();

Vec3D inivel = vel. copy();

branch newArm = new branch(v, inivel,generations -1,"A");

allArms. add(newArm);

Vec3D v2 = loc. copy();

Vec3D inivel2 = vel. copy();

branch newArm2 = new branch(v2, inivel2,generations -1,"B");

allArms. add(newArm2);

Vec3D v3 = loc. copy();

Vec3D inivel3 = vel. copy();

branch newArm3 = new branch(v3, inivel3,generations -1,"C");

allArms. add(newArm3);

Vec3D v4 = loc. copy();

Vec3D inivel4 = vel. copy();

branch newArm4 = new branch(v4, inivel4,generations -1,"D");

allArms. add(newArm4);

}

if (type == "B") {

Vec3D v3 = loc. copy();

Vec3D inivel3 = vel. copy();

branch newArm3 = new branch(v3, inivel3,generations -1,"B");

allArms. add(newArm3);

Vec3D v4 = loc. copy();

Vec3D inivel4 = vel. copy();

branch newArm4 = new branch(v4, inivel4,generations -1,"C");

allArms. add(newArm4);

Vec3D v5 = loc. copy();

Vec3D inivel5 = vel. copy();

branch newArm5 = new branch(v5, inivel5,generations -1,"D");

allArms. add(newArm5);

Vec3D v6 = loc. copy();

Vec3D inivel6 = vel. copy();

branch newArm6 = new branch(v6, inivel6,generations -1,"A");

allArms. add(newArm6);

}

if (type == "C") {

Vec3D v3 = loc. copy();

Vec3D inivel3 = vel. copy();

branch newArm3 = new branch(v3, inivel3,generations -1,"C");

allArms. add(newArm3);

Vec3D v4 = loc. copy();

Vec3D inivel4 = vel. copy();

branch newArm4 = new branch(v4, inivel4,generations -1,"D");

allArms. add(newArm4);

Vec3D v5 = loc. copy();

Vec3D inivel5 = vel. copy();

branch newArm5 = new branch(v5, inivel5,generations -1,"A");

allArms. add(newArm5);

Vec3D v6 = loc. copy();

Vec3D inivel6 = vel. copy();

branch newArm6 = new branch(v6, inivel6,generations -1,"B");

allArms. add(newArm6);

}

if (type == "D") {

Vec3D v3 = loc. copy();

Vec3D inivel3 = vel. copy();

branch newArm3 = new branch(v3, inivel3,generations -1,"D");

allArms. add(newArm3);

Vec3D v4 = loc. copy();

Vec3D inivel4 = vel. copy();

branch newArm4 = new branch(v4, inivel4,generations -1,"A");

allArms. add(newArm4);

Vec3D v5 = loc. copy();

Vec3D inivel5 = vel. copy();

branch newArm5 = new branch(v5, inivel5,generations -1,"B");

allArms. add(newArm5);

Vec3D v6 = loc. copy();

Vec3D inivel6 = vel. copy();

branch newArm6 = new branch(v6, inivel6,generations -1,"C");

allArms. add(newArm6);

}

void updateLoc(){

loc. addSelf(vel);

}

void updateDir(){

if (type =="A"){

float angle1 = radians(30);

float angle2 = radians(30);

float angle3 = radians(30);

vel. rotateX (angle1);

vel. rotateY (angle2);

vel. rotateZ (angle3);

}

if (type =="B"){

float angle1 = radians(-30);

float angle2 = radians(-30);

float angle3 = radians(-30);

vel. rotateX (angle1);

vel. rotateY (angle2);

vel. rotateZ (angle3);

}

if (type =="C"){

float angle1 = radians(0);

float angle2 = radians(0);

float angle3 = radians(0);

vel. rotateX (angle1);

vel. rotateY (angle2);

vel. rotateZ (angle3);

}

if (type =="D"){

float angle1 = radians(0);

float angle2 = radians(0);

float angle3 = radians(0);

vel. rotateX (angle1);

vel. rotateY (angle2);

vel. rotateZ (angle3);

}

void Display(){

stroke(0,0,0);

strokeWeight(0);

point (loc.x, loc.y, loc.z);

stroke(0);

strokeWeight(1);

line (loc.x, loc.y, loc.z, oriLoc.x, oriLoc.y, oriLoc.z);

}

Replies(10)

asimes

Re: Getting a static L system to grow in real time

1 year ago

Store the instructions into an array and go through the array one element (or more if you prefer) at a time in the draw loop.

retina_ma..

Re: Getting a static L system to grow in real time

1 year ago

hi thanks for the reply, but is there any way you could show me an example of how to do this?

sorry i am new to this

retina_ma..

Re: Getting a static L system to grow in real time

1 year ago

this docent work, but you mean something like this ?

i have also put the the intrusions in to the void run(); inside the class

import toxi.geom.*;

import peasy.*;

PeasyCam cam;

branch arm;

ArrayList <branch> allArms;

void setup (){

size (600,600, P3D);

smooth();

allArms = new ArrayList <branch>();

cam = new PeasyCam(this, 100);

Vec3D v = new Vec3D (0,0,0);

Vec3D inivel = new Vec3D (100,0,0);

arm = new branch(v, inivel, 6,"A");

allArms.add(arm);

}

void draw() {

background(255);

fill(227,53,53);

stroke(80);

sphere(100);

for (branch b: allArms){

b.updateDir();

b.updateLoc();

b.spawn();

b.run();

}

asimes

Re: Getting a static L system to grow in real time

1 year ago

I don't have those libraries, I built my own L Systems a while ago just using Strings of characters. I would animate it by going through the String one character at a time in my draw loop and execute its rule.

I looked over your code and it seems like your L System is made up of "A", "B", "C", or "D". Have a global array that stores these instructions to run through later. Your code includes a lot of terms I have never used (notably branch) so it is hard for me to say where to add this.

retina_ma..

Re: Getting a static L system to grow in real time

1 year ago

branch is just what i called the array

asimes

Re: Getting a static L system to grow in real time

1 year ago

Then I don't know what arm is, I have never seen an array in that form of initialization.

It seems like your idea is on the right track although I can't test it. This is multiple L Systems running at the same time then?

retina_ma..

Re: Getting a static L system to grow in real time

1 year ago

sorry my mistake. branch is the name of the class, and the arms are the class instance's. there are multiple strings(types) running at he same time. I can take c and d out. i was just playing and added more.

retina_ma..

Re: Getting a static L system to grow in real time

1 year ago

i have took them out to make it bait less clutered

import toxi.geom.*;

import peasy.*;

PeasyCam cam;

branch arm;

ArrayList <branch> allArms;

void setup (){

size (600,600, P3D);

smooth();

allArms = new ArrayList <branch>();

cam = new PeasyCam(this, 100);

Vec3D v = new Vec3D (0,0,0);

Vec3D inivel = new Vec3D (100,0,0);

arm = new branch(v, inivel, 6,"A");

allArms.add(arm);

}

void draw() {

background(255);

fill(227,53,53);

stroke(80);

sphere(100);

for (branch b: allArms){

b.run();

}

class branch {

Vec3D loc;

Vec3D oriLoc;

Vec3D vel;

int generations;

String type;

branch(Vec3D _loc, Vec3D _vel, int _generations, String _type){

loc =_loc;

oriLoc = loc.copy();

vel = _vel;

generations = _generations;

type= _type;

updateDir();

updateLoc();

spawn();

}

void run (){

Display();

}

void spawn(){

if (generations > 0) {

if (type == "A") {

Vec3D v = loc. copy();

Vec3D inivel = vel. copy();

branch newArm = new branch(v, inivel,generations -1,"A");

allArms. add(newArm);

Vec3D v2 = loc. copy();

Vec3D inivel2 = vel. copy();

branch newArm2 = new branch(v2, inivel2,generations -1,"B");

allArms. add(newArm2);

}

if (type == "B") {

Vec3D v3 = loc. copy();

Vec3D inivel3 = vel. copy();

branch newArm3 = new branch(v3, inivel3,generations -1,"B");

allArms. add(newArm3);

Vec3D v4 = loc. copy();

Vec3D inivel4 = vel. copy();

branch newArm4 = new branch(v4, inivel4,generations -1,"A");

allArms. add(newArm4);

}

void updateLoc(){

loc. addSelf(vel);

}

void updateDir(){

if (type =="A"){

float angle1 = radians(30);

float angle2 = radians(30);

float angle3 = radians(30);

vel. rotateX (angle1);

vel. rotateY (angle2);

vel. rotateZ (angle3);

}

if (type =="B"){

float angle1 = radians(-30);

float angle2 = radians(-30);

float angle3 = radians(-30);

vel. rotateX (angle1);

vel. rotateY (angle2);

vel. rotateZ (angle3);

}

void Display(){

stroke(0,0,0);

strokeWeight(0);

point (loc.x, loc.y, loc.z);

stroke(0);

strokeWeight(1);

line (loc.x, loc.y, loc.z, oriLoc.x, oriLoc.y, oriLoc.z);

}

retina_ma..

Re: Getting a static L system to grow in real time

1 year ago

would you be able to post an example of the code you used to structure?

asimes

Re: Getting a static L system to grow in real time

1 year ago

Sure, this makes a Koch curve. The code is quite old, I'm sure there is a better way to store the information but this is how I figured it out at the time:

String rule = "F+F-F-F+F";
String toDo = "F";
String newStr = "";
int currChar;
int unitSize = 3;
int iterations = 5;
float angle,x,y,nx,ny;
void setup() {
size(750,375);
x = unitSize;
y = height-unitSize;
nx = x;
ny = y;
for(int i = 0; i < iterations; i++) {
for(int j = 0; j < toDo.length(); j++) {
char curr = toDo.charAt(j);
if(curr == 'F') newStr += rule;
if(curr == '+') newStr += "+";
if(curr == '-') newStr += "-";
}
toDo = newStr;
newStr = "";
}
}
void draw() {
if(currChar < toDo.length()) {
char curr = toDo.charAt(currChar);
if(curr == 'F') {
nx = x+(cos(angle)*unitSize);
ny = y+(sin(angle)*unitSize);
line(x,y,nx,ny);
x = nx;
y = ny;
}
if(curr == '-') angle += radians(90);
if(curr == '+') angle -= radians(90);
currChar++;
}
}