rainingcloud-blasty

art/rainingcloud-blasty/index.js

@@ -0,0 +1,110 @@
+/*
+@title: rainingCloud
+@author: blasty
+@snapshot: 0.png
+*/
+
+const width = 125;
+const height = 125;
+setDocDimensions(width, height);
+
+
+
+
+
+// =====================
+// User Parameters Start
+// =====================
+// These are the settings I recommend to change to customise the drawing
+// Don't use negative numbers, they won't work on anything other than rainOffset
+// There are some other changable parameters in the code, but I don't think they should be changed
+
+// Random seed, leave commented for random cloud every time
+// bt.setRandSeed(1234567890)
+
+// Number of arcs the cloud should have
+const cloudArcs = bt.randInRange(5, 7)
+
+// Number of rows of rain that should be drawn
+const rowsOfRain = Math.round(bt.randInRange(5, 7))
+// Number of "raindrops" that should be drawn per row
+const maxPerRow = bt.randInRange(20, 40)
+
+// The distance the rain should start from the bottom of the cloud
+const rainOffset = bt.randInRange(1, 3)
+// The degrees the "raindrops" should vary by. A value of 1 will randomise between -1 and 1
+const rainAngleRange = bt.randInRange(0, 2)
+
+// ===================
+// User Parameters End
+// ===================
+
+
+
+
+
+// cloud
+const cloudFinalLines = [];
+const ct = new bt.Turtle();
+
+var cloudArcAngle = 270
+for (let i = 0; i < cloudArcs; i++) {
+  cloudArcAngle = bt.randInRange(-80, -40) * (i / 2)
+  ct.setAngle(-cloudArcAngle)
+  const min = 6
+  const max = i == (cloudArcs - 1) ? 6 : 11
+  ct.arc(180, bt.randInRange(min, max))
+}
+
+const cloudEndPoint = [
+  ct.lines()[0][ct.lines()[0].length - 1][0],
+  ct.lines()[0][ct.lines()[0].length - 1][1]
+]
+
+ct.goTo([0, 0])
+
+// rain
+const rainFinalLines = []
+const rt = new bt.Turtle()
+
+const cloudBottomLength = Math.sqrt(Math.pow(cloudEndPoint[0], 2)
+                                    + Math.pow(cloudEndPoint[1], 2))
+const cloudBottomAngle = Math.atan(cloudEndPoint[0] / cloudEndPoint[1]) * (180 / Math.PI)
+
+bt.join(cloudFinalLines, ct.lines())
+bt.translate(cloudFinalLines, [width / 2, height / 2], bt.bounds(cloudFinalLines).cb)
+const angleOffset = cloudBottomAngle < 0 ? 90 : -90
+bt.rotate(cloudFinalLines, cloudBottomAngle + angleOffset)
+drawLines(cloudFinalLines)
+
+for (let i = 0; i < maxPerRow; i++) {
+  for (let j = 0; j < rowsOfRain; j++) {
+    const pos = rt.pos
+    rt.setAngle(bt.randInRange(-rainAngleRange, rainAngleRange) - 90)
+    rt.forward(bt.randInRange(3, 6))
+    rt.up()
+    rt.forward(bt.randInRange(2, 4))
+    rt.down()
+  }
+  rt.jump([rt.pos[0] + (cloudBottomLength / maxPerRow), 0])
+}
+
+
+bt.join(rainFinalLines, rt.lines())
+bt.translate(rainFinalLines, [
+  width / 2, bt.bounds(cloudFinalLines).yMin
+], bt.bounds(rainFinalLines).cb)
+bt.translate(rainFinalLines, [
+  0, -bt.bounds(rainFinalLines).height - rainOffset
+])
+drawLines(rainFinalLines)
+
+
+
+// the below draw bounding boxes, they were used for debug purposes
+
+// const temp1 = bt.bounds(cloudFinalLines)
+// drawLines([[[temp1.xMin, temp1.yMin], [temp1.xMin, temp1.yMax], [temp1.xMax, temp1.yMax], [temp1.xMax, temp1.yMin], [temp1.xMin, temp1.yMin]]])
+
+// const temp2 = bt.bounds(rainFinalLines)
+// drawLines([[[temp2.xMin, temp2.yMin], [temp2.xMin, temp2.yMax], [temp2.xMax, temp2.yMax], [temp2.xMax, temp2.yMin], [temp2.xMin, temp2.yMin]]])