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Space.js
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Space.js
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"use strict"
function Space() {
this.center = {x: 0, y: 0};
this.radius = 0;
this.center = pickCenter();
if (this.center != null) {
this.radius = pickRadius(this.center);
}
function pickCenter() {
let numTries = 0;
let maxTries = 3;
let center = pickPoint();
// does this point lie in another space in the composition?
for (let i = 0; i < canvas.composition.spaces.length; i++) {
while (dist(center.x, center.y, canvas.composition.spaces[i].center.x, canvas.composition.spaces[i].center.y) <= canvas.composition.spaces[i].radius) {
if (numTries == maxTries) {
return null;
} else {
center = pickPoint();
numTries++;
i = 0
}
}
}
return center;
function pickPoint() {
return {
x: int(random(-canvas.composition.width/2, canvas.composition.width/2)),
y: int(random(-canvas.composition.height/2, canvas.composition.height/2)),
};
}
}
function pickRadius(center) {
let radius = 0;
// does the space extend beyond the edge of a mat?
while( inComposition(center) ) {
radius++;
// does the space encroach on another space?
for (let i = 0; i < canvas.composition.spaces.length; i++) {
if ( encroaching(center, radius, canvas.composition.spaces[i]) ) {
return radius;
};
}
}
return radius;
function inComposition(center) {
if ((abs(center.x) + radius < int(canvas.composition.width/2)) && (abs(center.y) + radius < int(canvas.composition.height/2) )) {
return true;
}
}
function encroaching(center, radius, space) {
let overlap = 1; // 1 = no overlap
if (dist(center.x, center.y, space.center.x, space.center.y) < (radius + space.radius)/overlap) {
return true;
}
}
}
}