Based on: Traveling Through the Square Series by Roger Coqart, 1976
Category: direct
Description:
This sketch is running in the browser.
/*
Part of the ReCode Project (http://recodeproject.com)
Based on "Traveling Through the Square Series" by Roger Coqart
Originally published in "Computer Graphics and Art" vol1 no3, 1976
Copyright (c) 2012 Sermad Buni - OSI/MIT license (http://recodeproject/license).
*/
// globals
int square_size = 40;
int canvaswidth = 16;
int canvasheight = 9;
Square[][] squares = new Square[canvaswidth][canvasheight];
void setup() {
strokeWeight(1);
smooth(8);
// set the size of the canvas
size( (canvaswidth + 2) * square_size, (canvasheight + 2) * square_size, P2D );
// set the background of the canvas
background(#ffffff);
// by default squares are drawn with a filled colour
// so we need to turn this off
noFill();
// we need to make a loop in a loop
for(int i=0; i < canvaswidth; i++) {
for(int j=0; j < canvasheight; j++) {
squares[i][j] = new Square(i, j);
squares[i][j].display();
}
}
// finished!
save("traveling_through_square_series.jpg");
}
class Square {
int i, j, type;
int tri_padding = 3;
int tri_length = square_size-tri_padding;
boolean top_open;
boolean right_open;
boolean bottom_open;
boolean left_open;
Square (int i_, int j_) {
i = i_;
j = j_;
//type = 0;
//type = 1;
// set the triange type - big or small
type = int (random(2));
// assign one side randonly to be blank
// but match up two blank sides
setRandomSide();
}
boolean checkRandomSide() {
if(top_open || bottom_open || left_open || right_open) {
return true;
} else {
return false;
}
}
void setRandomSide() {
/// check if we are not on the first column
if(i > 0) {
// check if the square to the left has a space open to the right
// if so then this square needs to open to the left
if(squares[i-1][j].right_open) {
left_open = true;
}
}
if(j > 0) { // check if we are on the top row
// check if the square to the above has a space open to the bottom
// if so then this square needs to open to the top
if(squares[i][j-1].bottom_open) {
top_open = true;
}
}
// check if we are not on the bottom row
if(j < canvasheight-1 && !checkRandomSide() ) {
bottom_open = generateRandom();
}
// check if we are not on far right column
if( i < canvaswidth-1 && !checkRandomSide() ) {
right_open = generateRandom();
}
}
boolean generateRandom() {
int R = int (random(1));
if(R == 0) {
return true;
} else {
return true;
}
}
void display() {
switch(type) {
case 0:
// big triangles
pushMatrix();
translate((square_size*i) + square_size, (square_size*j) + square_size);
if(int (random(2)) == 0) {
if(left_open) {
beginShape();
vertex(0, tri_padding);
vertex(tri_length - tri_padding, tri_padding);
vertex(0, tri_length - 0);
endShape();
} else if(top_open) {
// fixed
beginShape();
vertex(tri_padding, 0);
vertex(tri_padding, tri_length - tri_padding);
vertex(tri_length-0, 0);
endShape();
} else if (right_open) {
// no need
beginShape();
vertex(tri_padding, tri_padding);
vertex(tri_length-tri_padding, tri_padding);
vertex(tri_padding, tri_length-tri_padding);
endShape(CLOSE);
} else {
beginShape();
vertex(tri_padding, tri_padding);
vertex(tri_length-tri_padding, tri_padding);
vertex(tri_padding, tri_length-tri_padding);
endShape(CLOSE);
}
if(bottom_open) {
// fixed
beginShape();
vertex(tri_padding+0, tri_length+tri_padding);
vertex(tri_length, tri_padding+tri_padding);
vertex(tri_length, tri_length+tri_padding);
endShape();
} else if(right_open) {
beginShape();
//stroke(255,0,255);
vertex(tri_length + tri_padding, tri_padding + 0);
vertex(tri_padding + tri_padding, tri_length);
vertex(tri_length + tri_padding, tri_length);
endShape();
}else {
beginShape();
vertex(tri_length, tri_padding+tri_padding);
vertex(tri_padding+tri_padding, tri_length);
vertex(tri_length, tri_length);
endShape(CLOSE);
}
} else {
//
if(left_open) {
// fixed
beginShape();
vertex(0, tri_padding+0);
vertex(tri_length-tri_padding, tri_length);
vertex(0, tri_length);
endShape();
} else if(bottom_open) {
// fixed
beginShape();
vertex(tri_padding, tri_length+tri_padding);
vertex(tri_padding, tri_padding+tri_padding);
vertex(tri_length, tri_length+tri_padding);
endShape();
} else if(right_open) {
// no need
beginShape();
vertex(tri_padding, tri_length);
vertex(tri_padding, tri_padding+tri_padding);
vertex(tri_length-tri_padding, tri_length);
endShape(CLOSE);
} else {
beginShape();
vertex(tri_padding, tri_length);
vertex(tri_padding, tri_padding+tri_padding);
vertex(tri_length-tri_padding, tri_length);
endShape(CLOSE);
}
//
if(top_open) {
beginShape();
// fixed
vertex(tri_padding, 0);
vertex(tri_length, tri_length-tri_padding);
vertex(tri_length, 0);
endShape();
} else if (right_open) {
// fixed
beginShape();
vertex(tri_length + tri_padding, tri_length - 0);
vertex(tri_padding+tri_padding, tri_padding);
vertex(tri_length + tri_padding, tri_padding);
endShape();
} else {
beginShape();
vertex(tri_length, tri_length-tri_padding);
vertex(tri_padding+tri_padding, tri_padding);
vertex(tri_length, tri_padding);
endShape(CLOSE);
}
}
popMatrix();
break;
case 1:
// little triangles
pushMatrix();
translate((square_size*i) + square_size, (square_size*j) + square_size);
// top
beginShape();
if(top_open) {
vertex(tri_padding, 0);
vertex(square_size/2, (square_size/2) - tri_padding);
vertex(tri_length, 0);
endShape();
} else {
vertex(tri_padding+tri_padding, tri_padding);
vertex(square_size/2, (square_size/2) - tri_padding);
vertex(tri_length-tri_padding, tri_padding);
endShape(CLOSE);
}
// right
beginShape();
if(right_open) {
vertex(tri_length + tri_padding, tri_padding);
vertex( (square_size/2) + tri_padding, square_size/2);
vertex(tri_length + tri_padding, tri_length );
endShape();
} else {
vertex(tri_length, tri_padding+tri_padding);
vertex( (square_size/2) + tri_padding, square_size/2);
vertex(tri_length, tri_length - tri_padding);
endShape(CLOSE);
}
// bottom
beginShape();
if(bottom_open) {
vertex(tri_padding, tri_length + tri_padding );
vertex(square_size/2, (square_size/2) + tri_padding );
vertex(tri_length, tri_length + tri_padding );
endShape();
} else {
vertex(tri_padding+tri_padding, tri_length );
vertex(square_size/2, (square_size/2) + tri_padding );
vertex(tri_length-tri_padding, tri_length );
endShape(CLOSE);
}
// left
if(left_open) {
beginShape();
vertex(0, tri_padding );
vertex( (square_size/2) - tri_padding, square_size/2);
vertex(0, tri_length );
endShape();
} else {
beginShape();
vertex(tri_padding, tri_padding+tri_padding);
vertex( (square_size/2) - tri_padding, square_size/2);
vertex(tri_padding, tri_length - tri_padding);
endShape(CLOSE);
}
popMatrix();
break;
}
}
}