Re-programming the "Birds" example
in
Programming Questions
•
1 year ago
Hello all,
I have a Processing dilemma. What I am essentially trying to do is modify the 3D flocking "Birds" example on
processing.org so that void mousePressed() will add another "bird" to the environment (birdCount), and so that colorR and size (w & h, or another value like sizeMultiplier to scale w & h) will be mapped to a pulse sensor value I will be getting from an Arduino. However, with the way the arrays are set up in the example, this seems impossible by means of a simple modification. Here is the code I am working with, which I am hoping you can help me make more sense of:
// Flock array
int birdCount = 10;
//CLICK TO ADD ONE TO BIRDCOUNT--DOES NOT WORK
//void mousePressed() {
// birdCount += 1;
//}
Bird[]birds = new Bird[birdCount];
float[]x = new float[birdCount];
float[]y = new float[birdCount];
float[]z = new float[birdCount];
float[]rx = new float[birdCount];
float[]ry = new float[birdCount];
float[]rz = new float[birdCount];
float[]spd = new float[birdCount];
float[]rot = new float[birdCount];
void setup() {
size(800, 600, P3D);
noStroke();
// Initialize arrays with random values
for (int i = 0; i < birdCount; i++){
birds[i] = new Bird(random(-300, 300), random(-300, 300),
random(-500, -2500), random(5, 30), random(5, 30));
x[i] = random(20, 340);
y[i] = random(30, 350);
z[i] = random(1000, 4800);
rx[i] = random(-160, 160);
ry[i] = random(-55, 55);
rz[i] = random(-20, 20);
spd[i] = random(.1, 3.75);
rot[i] = random(.025, .15);
}
}
void draw() {
background(255);
lights();
for (int i = 0; i < birdCount; i++){
birds[i].setFlight(x[i], y[i], z[i], rx[i], ry[i], rz[i]);
birds[i].setWingSpeed(spd[i]);
birds[i].setRotSpeed(rot[i]);
birds[i].fly();
}
}
class Bird {
// Properties
float offsetX, offsetY, offsetZ;
float w, h;
int bodyFill;
int wingFill;
float ang = 0, ang2 = 0, ang3 = 0, ang4 = 0;
float radiusX = 120, radiusY = 200, radiusZ = 700;
float rotX = 15, rotY = 10, rotZ = 5;
float flapSpeed = 0.4;
float rotSpeed = 0.1;
//BIRD COLOR
float colorR = random(0, 255); // THIS WILL BE REPLACED BY A SCALED PULSE SENSOR VALUE
float colorG = 0;
float colorB = 255 - colorR;
// Constructors
Bird(){
//BIRDH & BIRDW CAN BE MULTIPLIED TO CHANGE SIZE OF BIRDS
this(0, 0, 0, 60, 80);
}
Bird(float offsetX, float offsetY, float offsetZ,
float w, float h){
this.offsetX = offsetX;
this.offsetY = offsetY;
this.offsetZ = offsetZ;
this.h = h;
this.w = w;
bodyFill = color(colorR, colorG, colorB);
wingFill = color(colorR, colorG, colorB);
}
void setFlight(float radiusX, float radiusY, float radiusZ,
float rotX, float rotY, float rotZ){
this.radiusX = radiusX;
this.radiusY = radiusY;
this.radiusZ = radiusZ;
this.rotX = rotX;
this.rotY = rotY;
this.rotZ = rotZ;
}
void setWingSpeed(float flapSpeed){
this.flapSpeed = flapSpeed;
}
void setRotSpeed(float rotSpeed){
this.rotSpeed = rotSpeed;
}
void fly() {
pushMatrix();
float px, py, pz;
// Flight
px = sin(radians(ang3)) * radiusX;
py = cos(radians(ang3)) * radiusY;
pz = sin(radians(ang4)) * radiusZ;
translate(width/2 + offsetX + px, height/2 + offsetY+py, -700 + offsetZ+pz);
rotateX(sin(radians(ang2)) * rotX);
rotateY(sin(radians(ang2)) * rotY);
rotateZ(sin(radians(ang2)) * rotZ);
// Body
fill(bodyFill);
box(w/5, h, w/5);
// Left wing
fill(wingFill);
pushMatrix();
rotateY(sin(radians(ang)) * 20);
rect(0, -h/2, w, h);
popMatrix();
// Right wing
pushMatrix();
rotateY(sin(radians(ang)) * -20);
rect(-w, -h/2, w, h);
popMatrix();
// Wing flap
ang += flapSpeed;
if (ang > 3) {
flapSpeed*=-1;
}
if (ang < -3) {
flapSpeed*=-1;
}
// Ang's run trig functions
ang2 += rotSpeed;
ang3 += 1.25;
ang4 += 0.55;
popMatrix();
}
}
How might I be able to modify this in a way that will work, and why is my current thinking not working?
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