From f177163dcfe0fea9ae3b5efeb4d7156ced66c384 Mon Sep 17 00:00:00 2001
From: David Wursteisen <david.wursteisen+git@gmail.com>
Date: Mon, 18 Mar 2024 23:49:34 +0100
Subject: [PATCH] Add Gfx example

---
 .../com/github/minigdx/tiny/lua/GfxLib.kt     |  2 +-
 .../github/minigdx/tiny/lua/GfxLibExamples.kt | 33 +++++++++++++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/tiny-engine/src/commonMain/kotlin/com/github/minigdx/tiny/lua/GfxLib.kt b/tiny-engine/src/commonMain/kotlin/com/github/minigdx/tiny/lua/GfxLib.kt
index 6720bd99..82926083 100644
--- a/tiny-engine/src/commonMain/kotlin/com/github/minigdx/tiny/lua/GfxLib.kt
+++ b/tiny-engine/src/commonMain/kotlin/com/github/minigdx/tiny/lua/GfxLib.kt
@@ -129,7 +129,7 @@ class GfxLib(private val resourceAccess: GameResourceAccess) : TwoArgFunction()
         }
     }
 
-    @TinyFunction("Move the game camera.")
+    @TinyFunction("Move the game camera.", example = GFX_CAMERA_EXAMPLE)
     inner class camera : TwoArgFunction() {
 
         @TinyCall("Reset the game camera to it's default position (0,0).")
diff --git a/tiny-engine/src/commonMain/kotlin/com/github/minigdx/tiny/lua/GfxLibExamples.kt b/tiny-engine/src/commonMain/kotlin/com/github/minigdx/tiny/lua/GfxLibExamples.kt
index 26d33693..816fd061 100644
--- a/tiny-engine/src/commonMain/kotlin/com/github/minigdx/tiny/lua/GfxLibExamples.kt
+++ b/tiny-engine/src/commonMain/kotlin/com/github/minigdx/tiny/lua/GfxLibExamples.kt
@@ -111,3 +111,36 @@ function _draw()
     local pos = ctrl.touch()
     shape.circlef(pos.x, pos.y, 4, math.rnd())
 end"""
+
+//language=Lua
+const val GFX_CAMERA_EXAMPLE = """
+local x = 0
+local y = 0
+
+function _update()
+    if ctrl.pressing(keys.left) then
+        x = x - 0.5
+    elseif ctrl.pressing(keys.right) then
+        x = x + 0.5
+    end
+
+    if ctrl.pressing(keys.up) then
+        y = y - 0.5
+    elseif ctrl.pressing(keys.down) then
+        y = y + 0.5
+    end
+    gfx.camera(math.floor(x), math.floor(y))
+end
+
+function _draw()
+    gfx.cls(2)
+    for x = 0 - 64, 256 + 64, 16 do
+        for y = 0 - 64, 256 + 64, 16 do
+            shape.line(x - 2, y, x + 2, y, 9)
+            shape.line(x, y - 2, x, y + 2, 9)
+        end
+    end
+    print("camera: ("..x..", "..y..")", 6, 6)
+    
+    shape.rect(0, 0, 256, 256, 1)
+end"""