added NaturalTree

src/logo/NaturalTree.scala

@@ -0,0 +1,93 @@
+package logo
+
+import java.awt.{Color, Point}
+import scala.util.Random
+
+class NaturalTree(width: Int, height: Int, angleStep_ : Double) extends Tree(width, height, angleStep_) {
+  val MIN_STRAW_ANGLE: Double = 60
+  val MAX_STRAW_ANGLE: Double = 100
+  val MIN_N_STRAWS: Int = 90
+  val MAX_N_STRAWS: Int = 200
+  //val STRAW_COLOR1: Color = new Color(230, 188, 43)
+  //val STRAW_COLOR2: Color = new Color(255, 226, 71)
+  //val STRAW_COLOR1: Color = new Color(96, 163, 67)
+  //val STRAW_COLOR2: Color = new Color(112, 198, 76)
+  val STRAW_COLOR1: Color = new Color(108, 83, 61)
+  val STRAW_COLOR2: Color = new Color(174, 105, 44)
+  val TRUNK_COLOR: Color = new Color(65, 61, 64)
+
+  override def drawTree(n: Int, length: Double): Unit = {
+    var n2: Int = n
+    val r: Double = math.random()
+    if (r < 0.25) {
+      n2 -= 1
+    } else if (r > 0.9) {
+      if (n2 < 2) {
+        n2 += 3
+      }
+    }
+    turn(angleStep * (math.random() - 0.5) * 2)
+    val a: Double = angleStep
+    angleStep -= math.random() * angleStep / 10
+    super.drawTree(n2, length)
+    angleStep = a
+  }
+
+  override def drawBranch(length: Double): Unit = {
+    setPenWidth((length / 10).toFloat)
+    setColor(TRUNK_COLOR)
+    super.drawBranch(length)
+  }
+
+  override def drawLeaf(length: Double): Unit = {
+    val angle: Double = getTurtleAngle()
+    val pos: Point = getPosition()
+    val nStraws: Int = Random.between(MIN_N_STRAWS, MAX_N_STRAWS)
+    val strawsAngle: Double = Random.between(MIN_STRAW_ANGLE, MAX_STRAW_ANGLE)
+    val step: Double = strawsAngle / (nStraws - 1)
+    val oAngle: Double = angle - strawsAngle / 2
+    val strawLen: Double = length * 20
+
+    setPenWidth(1f)
+    for (i: Int <- 0 until nStraws) {
+      setPenWidth(0.5f + (nStraws - i) / (nStraws - 1f) / 10)
+      setColor(lerpCol((nStraws - i) / (nStraws - 1.0)))
+      //val a: Double = oAngle + i * step + (math.random() * 2 -1) * step / 5
+      val a: Double = oAngle + math.random() * strawsAngle
+      var l: Double = strawLen * (nStraws.toDouble - i) / nStraws
+      l += (math.random() * 2 - 1) * l / 2
+      setAngle(a)
+      jump(pos.x, pos.y)
+      //forward(strawLen + (math.random() * 2 - 1) * strawLen / 2)
+      forward(l)
+    }
+    jump(pos.x, pos.y)
+    setAngle(angle)
+  }
+
+  def lerpCol(f: Double): Color = {
+    val r: Int = ((STRAW_COLOR2.getRed - STRAW_COLOR1.getRed) * f + STRAW_COLOR1.getRed).toInt
+    val g: Int = ((STRAW_COLOR2.getGreen - STRAW_COLOR1.getGreen) * f + STRAW_COLOR1.getGreen).toInt
+    val b: Int = ((STRAW_COLOR2.getBlue - STRAW_COLOR1.getBlue) * f + STRAW_COLOR1.getBlue).toInt
+    return new Color(
+      math.min(255, math.max(0, r)),
+      math.min(255, math.max(0, g)),
+      math.min(255, math.max(0, b))
+    )
+  }
+}
+
+object NaturalTree {
+  def main(args: Array[String]): Unit = {
+    val tree: NaturalTree = new NaturalTree(600, 600, 25)
+    tree.jump(300, 600)
+    tree.setAngle(-90)
+    tree.drawTree(8, 80)
+
+    for (i: Int <- 0 until 10) {
+      tree.jump(Random.between(0, 600), 600)
+      tree.setAngle(-90)
+      tree.drawTree(3, 20)
+    }
+  }
+}

src/logo/Tree.scala

@@ -4,7 +4,7 @@ import hevs.graphics.TurtleGraphics
 
 import java.awt.Point
 
-class Tree(width: Int, height: Int, val angleStep: Double) extends TurtleGraphics(width, height) {
+class Tree(width: Int, height: Int, var angleStep: Double) extends TurtleGraphics(width, height) {
   def drawTree(n: Int, length: Double): Unit = {
     if (n > 1) {
       drawBranch(length)
@@ -19,12 +19,17 @@ class Tree(width: Int, height: Int, val angleStep: Double) extends TurtleGraphic
       drawTree(n - 1, length * 0.8)
     } else {
       drawBranch(length)
+      drawLeaf(length / 10)
     }
   }
 
   def drawBranch(length: Double): Unit = {
     forward(length)
   }
+
+  def drawLeaf(length: Double): Unit = {
+
+  }
 }
 object Tree {
   def main(args: Array[String]): Unit = {