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Topic: beginnger: Creating Objects (Read 622 times) |
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roland_g
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beginnger: Creating Objects
« on: Feb 15th, 2005, 10:15pm » |
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I am still pretty bad at programming and want to modify this simple bouncing ball programm so it automatically creates a new bouncing ball whenever a ball hits the wall.
Unfortunatly I don't quite know how to do this. How to I get the exact coordinates whenever the ball hits the wall and how do I assign a different speed to the dynamically created ball so all the balls don't overlap and move along the same course?
Like I said I am still learning, so please bear with me
Code:
//---------------------------------------------------------
float size;
float [] xspeed = new float[3];
float [] yspeed = new float[3];
float xpos, ypos;
float xdirection = 1;
float ydirection = 1;
//---------------------------------------------------------
void setup (){
size (500,500);
xpos = width/2;
ypos = height/2;
xspeed[0] = 0.5;
xspeed[1] = 2.8;
xspeed[2] = 1.9;
yspeed[0] = 3.1;
yspeed[1] = 9.3;
yspeed[2] = 10.4;
framerate(200);
}
//---------------------------------------------------------
void loop (){
background(#280915);
noStroke();
fill(#940B35);
smooth();
//----- SPEED CONFIG
xpos = xpos +(xspeed[1] * xdirection);
ypos = ypos +(yspeed[0] * ydirection);
//----- CHANGE HORIZONTAL DIRECTION
if (xpos > width-size/2 || xpos < 1+size/2)
{
xdirection *=-1;
}
//----- CHANGE VERTICAL DIRECTION
if (ypos > height-size/2 || ypos <1+size/2)
{
ydirection *=-1;
}
//----- SIZE CHANGE
/* if (xdirection < 1){
size = 70; }
else{
size = 100;}*/
//----- DRAW ELLIPSE
ellipseMode(CENTER_DIAMETER);
ellipse(xpos, ypos,size,size);
}
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sspboyd
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Re: beginnger: Creating Objects
« Reply #1 on: Feb 16th, 2005, 9:49pm » |
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Hi Roland,
Have you seen this tutorial?
http://p5.chronotext.org/tutorials/motion_oop/
You might find it helpful. It will introduce you to object oriented programming, and, coincidentally it uses an example program of moving several balls around.
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gmail.com w/ sspboyd username
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roland_g
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Re: beginnger: Creating Objects
« Reply #2 on: Feb 23rd, 2005, 10:51am » |
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thanks!
I tried another object oriented programming tutorial earlier, but that didn't go over too well.
Hope I'll make it work this time 
Code:
Ball ball001;
Ball ball002;
void setup (){
size (500,500);
framerate(30);
colorMode(RGB);
color tempcolor = color (10,90,255);
ball001 = new Ball(tempcolor,width/2,height/2,5,2.4);
ball001 = new Ball(tempcolor,width/2,height/2,2.9,3.6);
}
void loop (){
background(#280915);
ball001.draw();
ball002.draw();
ball001.move();
ball002.move();
}
class Ball {
int size = 50;
float xpos;
float ypos;
float xspeed;
float yspeed;
color c;
int xdirection = 1;
int ydirection = 1;
Ball (color c_, float xp, float yp,float xs, float ys){
c = c_;
xpos = xp;
ypos = yp;
xspeed = xs;
yspeed = ys;
}
void draw(){
ellipseMode(CENTER_DIAMETER);
noStroke();
fill (c);
smooth();
ellipse(xpos,ypos,size,size);
}
void move(){
xpos = xpos +(xspeed * xdirection);
ypos = ypos +(yspeed * ydirection);
if (xpos > width-size/2 || xpos < 1+size/2){
xdirection *=-1;}
if (ypos > height-size/2 || ypos <1+size/2){
ydirection *=-1;}
}
}
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| « Last Edit: Feb 23rd, 2005, 10:52am by roland_g » |
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roland_g
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Re: beginnger: Creating Objects
« Reply #3 on: Feb 23rd, 2005, 2:25pm » |
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it worked
Now this is my first time using classes, does anybody have some tips on how to optimize this code?.
thank you
Code:
Ball[] ball;
int objectnumber = 250;
void setup (){
background(#280915);
size (500,500);
framerate(30);
ball = new Ball[objectnumber];
for (int i= 0; i < objectnumber; i++){
ball[i] = new Ball(#940B35,random(50,500),random(10,400),random(1,8),random(1,7));
}
}
void loop (){
background(#280915);
for (int i = 0; i < objectnumber; i++){
ball[i].draw ();
ball[i].move ();
}
}
class Ball {
float size= 5;
float xpos;
float ypos;
float xspeed;
float yspeed;
color c;
int xdirection = 1;
int ydirection = 1;
Ball (color c_,float xp, float yp,float xs, float ys){
c = c_;
xpos = xp;
ypos = yp;
xspeed = xs;
yspeed = ys;
}
void draw(){
ellipseMode(CENTER_DIAMETER);
colorMode(RGB);
smooth();
stroke(255,10);
//bezier(mouseX,mouseY,0,xpos,ypos,height/2,xpos,ypos);
//rect(mouseX,mouseY,10,10);
noStroke();
fill (255,40);
//push();
//translate(xpos,ypos);
//rotate(20);
ellipse(xpos,ypos,size+5,size+5);
//pop();
fill (c);
ellipse(xpos,ypos,size,size);
}
void move(){
xpos = xpos +(xspeed * xdirection);
ypos = ypos +(yspeed * ydirection);
if (xpos > width-size/2 || xpos < 1+size/2){
xdirection *=-1;
}
if (ypos > height-size/2 || ypos <1+size/2){
ydirection *=-1;
}
}
}
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| « Last Edit: Feb 23rd, 2005, 6:37pm by roland_g » |
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