first commit

1 files changed, 33 insertions, 0 deletions

diff --git a/examples/src/main/scala/Example.scala b/examples/src/main/scala/Example.scala
new file mode 100644
index 0000000..5d315b2
--- /dev/null
+++ b/examples/src/main/scala/Example.scala
@@ -0,0 +1,33 @@
+import Math._
+import org.scalajs.dom
+
+object Example extends scalajs.js.JSApp{
+  def main() = {
+    val canvas =
+      dom.document
+         .getElementById("example-canvas")
+         .asInstanceOf[dom.HTMLCanvasElement]
+
+    val renderer =
+      canvas.getContext("2d")
+            .asInstanceOf[dom.CanvasRenderingContext2D]
+
+    val (h, w) = (canvas.height, canvas.width)
+    var x = 0.0
+    val graphs = Seq[(String, Double => Double)](
+      ("red", sin),
+      ("green", x => 2 - abs(x % 8 - 4)),
+      ("blue", x => 3 * pow(sin(x / 12), 2) * sin(x))
+    ).zipWithIndex
+    dom.setInterval(() => {
+      x = (x + 1) % w
+      if (x == 0) renderer.clearRect(0, 0, w, h)
+      else for (((color, func), i) <- graphs) {
+        val y = func(x/w * 75) * h/40 + h/3 * (i+0.5)
+        renderer.fillStyle = color
+        renderer.fillRect(x, y, 3, 3)
+      }
+    }, 10)
+
+  }
+}
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