Processing Forum

Trying to make a simple for loop drawing blocks within a rectangle

[3 Replies]
- 23-Oct-2012 05:57 PM
- Forum: Programming Questions
I thought this would be easy, and it should be. But here is my problem. In the for loop, the blocks are drawing spaces in between and running off the screen. The size of each square is equal to the distance of the 1st rect / 10 ( or at least I'm pretty sure). Each time the loop iterates, there is a space I believe to be 175 pixels between the new rect. When I manipulate the 'x' component of the rect() the squares will eventuall overlap but will be too big for the rect() i'm drawing in. Can someone please help?

void gameBoard() {



float x = width*.175;

float y = height*.175;



rectMode(CENTER);

//rect1 outlines game board

rect(width/2,height/2,width*.75,height*.75);



//i = amount of game spaces - 10





for(int i = 1; i < 11; i++) {

//rect2

//reason for w & h / 10 is equal to width of rect2 / 10

rect(x*(i) ,y,width/10,height/10);





}



}

Trying to make a 2d array of a maze

[2 Replies]
- 04-Oct-2012 02:36 PM
- Forum: Programming Questions
I'm in the beginning part of this project. Having trouble with getting nested for loops to do what I want. Initially, what I am trying to do is create 3 cells that has 3 columns and 27 rows. They are drawing on top of each other and can not figure out how to get it to work. If I can get this cornerstone, than I'll be able to make the other components.

This is my initial code.

//think low level

// the parts of this function

// maze component

// particle movement component

//first make maze called drawBlocks

//global variables - what variables are needed for maze component

// drawing cells

int rows = 360;

int cols = 460;

//int cells; error message said duplicate

int w = width/cols;

int h = height/rows;

int [] [] cells = new int [w] [h];

void setup () {

size(460,360);

background(255);



//working 2D array, nested for loop



int cells = 10;

//meant to correlate to rows

for (int i = 0; i < 27; i++) {

//loop meant to correlate to cols

for (int j = 0; j < 3; j++) {

rect(0,0,cells,cells);



// w*=i;

//h*=j;



}

}

}

Having trouble with simple animation

[6 Replies]
- 21-Sep-2012 01:09 PM
- Forum: Programming Questions
Could someone guide me to figure out my problem? What I am trying to do is have a ball drop randomly to fall down stairs. I have not included code so that the ball will 'bounce' from the stairs, I'm just trying to get it to move right now.

float gravity;

float dampen;

void setup () {

background(255);

size(1000,1000);

stairs(width/1000, height/10, 100,100);

//collide(); // ball hitting stairs and falling

//window(); staic background window



}

void draw () {

ball(width/random(500), height/20, -20,-20); // sets random location for ball drop in an effort for different outcomes

//sun(width*.3, height/3, 50,50); // attempt to have the sun rise in background

int x = 15;

int y = 15;

}

void ball (float x, float y, float w, float h) {



float moveX = 3.5;

float moveY = 4.5;

float gravity = 1.5;

float dampen = 2.5;



fill(255,0,0);



ellipse(x,y,w,h);

// may be cool to have a mouse drop of ball



x += moveX;

y += moveY;

moveX = gravity;

moveY = dampen;



}

void stairs(float x, float y, float w, float h) { // function stairs making stairs



//pushMatrix(); do not entirely understand matrix stack

fill(0); // black background



for (int i = 0; i < 10; i++) { // begin loop for stairs

// rectMode(CORNER);

rect(x,y,w,h); // paramaterized from function stairs which contain values

translate(w,h); // w and h come from values in stairs ();

}

//popMatrix(); matrix stack



}

Getting a weird error message and code wont run.

[4 Replies]
- 20-Sep-2012 09:12 AM
- Forum: Programming Questions
Here is my code. Trying to make a ball bounce down stairs

//code inspired by real class notes

float x = 100; // class code

float y = 200;// class code

float moveX = 5.0;

float moveY = 0.0; //what would happen if y is > 1

float h;

float w;

float gravity = .05; // class

float damping = .77; // class

float friction = .05; // class

void setup () {

size(1000, 1000);

// why is init like this? cause you are calling the function init dumbass

init(x, y, moveX, moveY, w, h);

ball();

}

//what is void draw()

void draw () {

//makes a white background

background(255);

//what does bounce do?

bounce();

//what does collide do?

dontHitWall(); // taken from class code

//would stairs work in here? what if I put a loop before stairs

for (int i=0; i<10; i++) {

//or do you put Stairs(); in between the brackets?

}

stairs();

}

void ball () {

fill(255,0,0);

ellipseMode(CORNER);

ellipse(width/10, 0, width/80, height/80);



}

void stairs (int x = 100, float w = width/10, float h = height/10) {

fill(0);

rectMode(CORNER);

rect(x, x, w, h);

translate(w, h);

}

void bounce() {

x += moveX;

moveY += gravity;

y += moveY;

display();

}

//inspired by class code

void dontHitWall(){

if(x > width-w/2){

moveX *= -.5;

}



if(x < w/2){

spdX *= -.5;

}



if(y > height-h/2){

y = height-h/2;

moveY *= -1;

moveY *= damping;

moveX *= friction;

}



if(y < h/2){

moveY *= -1;

}

}

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