Add simple example

examples/simple/src/config.nims

@@ -0,0 +1,43 @@
+import ospaths
+
+switch("nimcache", "nimcache"/hostOS/hostCPU)
+
+when defined(macosx):
+  switch("passL", "-framework Cocoa -Wl,-undefined,dynamic_lookup")
+elif defined(android):
+  let ndk = getEnv("ANDROID_NDK_ROOT")
+  let toolchain = getEnv("ANDROID_TOOLCHAIN")
+
+  if ndk.len == 0:
+    raise newException(OSError,
+      "ANDROID_NDK_ROOT environment variable is necessary for android build")
+  if toolchain.len == 0:
+    raise newException(OSError,
+      "ANDROID_TOOLCHAIN environment variable is necessary for android build")
+
+  const level = $16 # change this to the necessary API level
+  const arch = "arm"
+  let sysroot = "--sysroot=\"" & ndk & "/platforms/android-" & level & "/arch-" & arch & "/\""
+  switch("passL", sysroot)
+  switch("passC", sysroot)
+
+  switch("cc", "clang")
+  switch("arm.linux.clang.path", toolchain / "bin")
+  switch("arm.linux.clang.exe", arch & "-linux-androideabi-clang")
+  switch("arm.linux.clang.compilerexe", arch & "-linux-androideabi-clang")
+  switch("arm.linux.clang.linkerexe", arch & "-linux-androideabi-clang")
+elif defined(windows):
+  assert(sizeof(int) == 8)
+  switch("cc", "vcc")
+  let godotLib = getEnv("GODOT_LIB")
+  if godotLib.len == 0:
+    raise newException(OSError,
+      "GODOT_LIB must be specified and point to the .lib file")
+  switch("clib", godotLib.changeFileExt(""))
+elif defined(linux):
+  switch("passC", "-fPIC")
+else:
+  raise newException(OSError, "Unsupported platform: " & hostOS)
+
+when not defined(release):
+  switch("debugger", "native")

examples/simple/src/fpscounter.nim

@@ -0,0 +1,17 @@
+# Copyright 2017 Xored Software, Inc.
+
+import strutils
+import godot
+import engine, label, resource_loader, packed_scene
+
+gdobj FPSCounter of Label:
+  var lastFPS: float32
+
+  method ready*() =
+    setProcess(true)
+
+  method process*(delta: float64) =
+    let fps = getFramesPerSecond()
+    if int(fps * 10) != int(lastFPS * 10):
+      lastFPS = fps
+      self.text = "FPS: " & formatFloat(fps, ffDecimal, 1)

examples/simple/src/mainpanel.nim

@@ -0,0 +1,18 @@
+# Copyright 2017 Xored Software, Inc.
+
+import godot
+import scene_tree, resource_loader, packed_scene, panel, global_constants,
+       input_event_mouse_button
+
+gdobj MainPanel of Panel:
+  method ready*() =
+    setProcessInput(true)
+
+  method input*(event: InputEvent) =
+    if event of InputEventMouseButton:
+      let ev = event as InputEventMouseButton
+      if ev.buttonIndex == BUTTON_LEFT:
+        getTree().setInputAsHandled()
+        let scene = load("res://scene.tscn") as PackedScene
+        getTree().getRoot().addChild(scene.instance())
+        queueFree()

examples/simple/src/nim.cfg

@@ -0,0 +1,9 @@
+--path:"$projectdir"
+--path:"$projectdir/../godotapi"
+--cincludes:"$projectdir/../godot_headers/"
+--experimental
+--app:lib
+--stackTrace:on
+-d:useRealtimeGc
+--noMain
+--warning[LockLevel]:off

examples/simple/src/simple.nim

@@ -0,0 +1,12 @@
+# Copyright 2017 Xored Software, Inc.
+
+## Import independent scene objects here
+## (no need to import everything, just independent roots)
+
+when not defined(release):
+  import segfaults # converts segfaults into NilAccessError
+
+import nimruntime
+
+import fpscounter
+import mainpanel

examples/simple/src/simple.nimble

@@ -0,0 +1,34 @@
+version       = "0.1.0"
+author        = "Xored Software, Inc."
+description   = "FPS Counter Sample"
+license       = "MIT"
+bin           = @["simple"]
+
+requires "https://github.com/pragmagic/godot-nim.git >= 0.2.2 & < 0.3.0"
+
+task make, "build":
+  const archPostfix = when sizeof(int) == 8: "_64" else: "_32"
+  const libFile =
+    when defined(windows):
+      "nim" & archPostfix & ".dll"
+    elif defined(ios):
+      "nim_ios.dylib"
+    elif defined(macosx):
+      "nim_mac.dylib"
+    elif defined(android):
+      "nim_android.so"
+    elif defined(linux):
+      "nim_linux" & archPostfix & ".so"
+    else: nil
+  if libFile.isNil:
+    raise newException(OSError, "Unsupported platform")
+
+  exec "nimble build -y"
+  const dir = "../project/_dlls/"
+  const target = dir & libFile
+  mkDir(dir)
+  when defined(windows):
+    rmFile(target)
+    mvFile(bin[0] & ".exe", target)
+  else:
+    mvFile(bin[0], target)