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art/citySnow-alex/index.js

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+/*
+@title: City at Night - Snowflakes Edition
+@author: alexdevz
+@snapshot: snowflake-city
+*/
+
+const buildingCount = 7;
+const minBuildingWidth = 10;
+const maxBuildingWidth = 20;
+const minBuildingHeight = 20;
+const maxBuildingHeight = 100;
+const buildingColors = ['gray', 'darkgray', 'lightgray'];
+const windowColor = 'yellow';
+const windowSize = 2;
+const moonRadius = 10;
+const moonColor = 'white';
+const snowflakeCount = 100;
+const snowflakeColor = 'white';
+const snowflakeSize = 0.5;
+const skyColor = 'black';
+
+setDocDimensions(125, 125);
+
+function randomInRange(min, max) {
+  return Math.random() * (max - min) + min;
+}
+
+function randomColor() {
+  const index = Math.floor(Math.random() * buildingColors.length);
+  return buildingColors[index];
+}
+
+function sky() {
+  const bottomLeft = [0, 0];
+  const topLeft = [0, 125];
+  const topRight = [125, 125];
+  const bottomRight = [125, 0];
+  return [bottomLeft, topLeft, topRight, bottomRight, bottomLeft];
+}
+
+const skyPoints = sky();
+drawLines([skyPoints], { fill: skyColor });
+
+//buildings and windows
+function building(x, width, height) {
+  const bottomLeft = [x, 0];
+  const bottomRight = [x + width, 0];
+  const topLeft = [x, height];
+  const topRight = [x + width, height];
+  return [bottomLeft, topLeft, topRight, bottomRight, bottomLeft];
+}
+
+function windows(x, width, height) {
+  const windows = [];
+  for (let i = x + windowSize; i < x + width; i += windowSize * 2) {
+    for (let j = windowSize; j < height; j += windowSize * 2) {
+      const window = [
+        [i, j],
+        [i + windowSize, j],
+        [i + windowSize, j + windowSize],
+        [i, j + windowSize],
+        [i, j]
+      ];
+      windows.push(window);
+    }
+  }
+  return windows;
+}
+//moon
+function moon() {
+  const moon = [];
+  const centerX = moonRadius;
+  const centerY = 125 - moonRadius;
+  for (let i = 0; i <= 360; i += 5) {
+    const angle = i * Math.PI / 180;
+    const x = centerX + moonRadius * Math.cos(angle);
+    const y = centerY + moonRadius * Math.sin(angle);
+    moon.push([x, y]);
+  }
+  return moon;
+}
+
+drawLines([moon()], { fill: moonColor });
+
+//building
+let x = 0;
+for (let i = 0; i < buildingCount; i++) {
+  const width = randomInRange(minBuildingWidth, maxBuildingWidth);
+  const height = randomInRange(minBuildingHeight, maxBuildingHeight);
+  const buildingPoints = building(x, width, height);
+  drawLines([buildingPoints], { fill: randomColor() });
+  const windowPoints = windows(x, width, height);
+  drawLines(windowPoints, { fill: windowColor });
+  x += width;
+}
+
+//snow
+function snowflake(x, y) {
+  const topLeft = [x, y];
+  const topRight = [x + snowflakeSize, y];
+  const bottomRight = [x + snowflakeSize, y + snowflakeSize];
+  const bottomLeft = [x, y + snowflakeSize];
+  return [topLeft, topRight, bottomRight, bottomLeft, topLeft];
+}
+
+for (let i = 0; i < snowflakeCount; i++) {
+  let x = randomInRange(0, 125);
+  let y = randomInRange(0, 125);
+
+  // avoid moon
+  while (Math.sqrt(Math.pow(x - moonRadius, 2) + Math.pow(y - (125 - moonRadius), 2)) < moonRadius) {
+    x = randomInRange(0, 125);
+    y = randomInRange(0, 125);
+  }
+
+  const snowflakePoints = snowflake(x, y);
+  drawLines([snowflakePoints], { fill: snowflakeColor });
+}