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refactor: fillCanvasWithSquares

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sthag 2026-04-20 20:39:35 +02:00
parent 0f92174143
commit c73f4fbdb3
1 changed files with 41 additions and 101 deletions
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132
source/view/demo/art/squares.liquid
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@ -29,40 +29,21 @@ tags:
'#b7e0f0', '#52bed1', '#0c85ff'
];
// Verify maxSquareSize and minSquareSize are powers of 2
if (!isPowerOfTwo(maxSquareSize) || !isPowerOfTwo(minSquareSize)) {
console.error('Both maxSquareSize and minSquareSize must be powers of 2');
return;
}
if (minSquareSize > maxSquareSize) {
console.error('minSquareSize must be <= maxSquareSize');
return;
}
if (largeSquarePercentage < 0 || largeSquarePercentage > 100) {
console.error('largeSquarePercentage must be between 0 and 100');
return;
}
function isPowerOfTwo(n) {
return n > 0 && (n & (n - 1)) === 0;
}
// Grid to track occupied cells
let grid = [];
if (!isPowerOfTwo(maxSquareSize) || !isPowerOfTwo(minSquareSize)) {
console.error('Both sizes must be powers of 2');
return;
}
function initializeGrid() {
grid = Array(Math.ceil(canvas.height / minSquareSize))
let grid = Array(Math.ceil(canvas.height / minSquareSize))
.fill(null)
.map(() => Array(Math.ceil(canvas.width / minSquareSize)).fill(false));
}
function canPlaceSquare(gridX, gridY, sizeInCells) {
if (gridY + sizeInCells > grid.length || gridX + sizeInCells > grid[0].length) {
return false;
}
function canPlace(gridX, gridY, sizeInCells) {
if (gridY + sizeInCells > grid.length || gridX + sizeInCells > grid[0].length) return false;
for (let y = gridY; y < gridY + sizeInCells; y++) {
for (let x = gridX; x < gridX + sizeInCells; x++) {
if (grid[y][x]) return false;
@ -71,7 +52,7 @@ tags:
return true;
}
function markSquareOccupied(gridX, gridY, sizeInCells) {
function markOccupied(gridX, gridY, sizeInCells) {
for (let y = gridY; y < gridY + sizeInCells; y++) {
for (let x = gridX; x < gridX + sizeInCells; x++) {
grid[y][x] = true;
@ -79,108 +60,67 @@ tags:
}
}
function drawSquare(gridX, gridY, sizeInPixels) {
const pixelX = gridX * minSquareSize;
const pixelY = gridY * minSquareSize;
const color = colors[Math.floor(Math.random() * colors.length)];
ctx.fillStyle = color;
ctx.fillRect(pixelX, pixelY, sizeInPixels, sizeInPixels);
function draw(gridX, gridY, sizeInPixels) {
const x = gridX * minSquareSize;
const y = gridY * minSquareSize;
ctx.fillStyle = colors[Math.floor(Math.random() * colors.length)];
ctx.fillRect(x, y, sizeInPixels, sizeInPixels);
ctx.strokeStyle = '#333';
ctx.lineWidth = 1;
ctx.strokeRect(pixelX, pixelY, sizeInPixels, sizeInPixels);
ctx.strokeRect(x, y, sizeInPixels, sizeInPixels);
}
function getSizesInDescendingOrder() {
const sizes = [];
for (let size = maxSquareSize; size >= minSquareSize; size /= 2) {
sizes.push(size);
}
return sizes;
}
function fill() {
const largestSizeInCells = maxSquareSize / minSquareSize;
function countPossibleSquares(size) {
const sizeInCells = size / minSquareSize;
let count = 0;
for (let gridY = 0; gridY < grid.length; gridY++) {
for (let gridX = 0; gridX < grid[0].length; gridX++) {
if (canPlaceSquare(gridX, gridY, sizeInCells)) {
count++;
}
}
}
return count;
}
function fillCanvasWithPercentage() {
const sizes = getSizesInDescendingOrder();
// Fill the largest squares based on percentage
const largestSize = sizes[0];
const maxPossibleLargeSquares = countPossibleSquares(largestSize);
const targetLargeSquares = Math.floor((maxPossibleLargeSquares * largeSquarePercentage) / 100);
const largestSizeInCells = largestSize / minSquareSize;
// Collect all valid positions for largest squares
if (targetLargeSquares > 0) {
// Collect and shuffle positions for largest squares
const positions = [];
for (let gridY = 0; gridY < grid.length; gridY++) {
for (let gridX = 0; gridX < grid[0].length; gridX++) {
if (canPlaceSquare(gridX, gridY, largestSizeInCells)) {
if (canPlace(gridX, gridY, largestSizeInCells)) {
positions.push({ gridX, gridY });
}
}
}
// Shuffle positions array
positions.sort(() => Math.random() - 0.5);
// Place squares up to target percentage
let placedCount = 0;
for (let i = 0; i < positions.length && placedCount < targetLargeSquares; i++) {
// Place largest squares up to percentage
const target = Math.floor(positions.length * largeSquarePercentage / 100);
for (let i = 0; i < target; i++) {
const { gridX, gridY } = positions[i];
// Double-check the position is still valid before placing
if (canPlaceSquare(gridX, gridY, largestSizeInCells)) {
markSquareOccupied(gridX, gridY, largestSizeInCells);
drawSquare(gridX, gridY, largestSize);
placedCount++;
}
if (canPlace(gridX, gridY, largestSizeInCells)) {
markOccupied(gridX, gridY, largestSizeInCells);
draw(gridX, gridY, maxSquareSize);
}
}
// Fill remaining space with all sizes in descending order
// Skip the largest size since we already handled it
for (let i = 1; i < sizes.length; i++) {
const size = sizes[i];
const sizeInCells = size / minSquareSize;
// Fill remaining space with smaller sizes
for (let size = maxSquareSize / 2; size >= minSquareSize; size /= 2) {
const cellSize = size / minSquareSize;
for (let gridY = 0; gridY < grid.length; gridY++) {
for (let gridX = 0; gridX < grid[0].length; gridX++) {
if (canPlaceSquare(gridX, gridY, sizeInCells)) {
markSquareOccupied(gridX, gridY, sizeInCells);
drawSquare(gridX, gridY, size);
if (canPlace(gridX, gridY, cellSize)) {
markOccupied(gridX, gridY, cellSize);
draw(gridX, gridY, size);
}
}
}
}
}
initializeGrid();
fillCanvasWithPercentage();
fill();
window.addEventListener('resize', () => {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
grid = Array(Math.ceil(canvas.height / minSquareSize))
.fill(null)
.map(() => Array(Math.ceil(canvas.width / minSquareSize)).fill(false));
ctx.clearRect(0, 0, canvas.width, canvas.height);
initializeGrid();
fillCanvasWithPercentage();
fill();
});
}
fillCanvasWithSquares(128, 8, 40);
fillCanvasWithSquares(128, 8, 10);
</script>
{% endblock %}