doc

doc/demo01_hello/5.node2d.md

@@ -18,10 +18,12 @@ Sprite用来显示一张图片，再给Sprite增加一个刚体
 3 移除RigidBody2D刚体节点
 ```
 
-# 2. Node2D节点
+# 2. Node节点
 
 - Node节点，父类节点
 
+![Image text](image/node2d-01.JPG)
+
 ```
 1. Pause Mode节点的暂停
 get_tree().paused = true
@@ -34,14 +36,41 @@ Process（处理） ：无条件处理节点（以及 Inherit 模式的子节点
 process方法执行的优先级，对于子节点依然有效
 
 挂载外部的脚本
+
 ```
 
+```
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	# get_tree().paused = true
+	pass
+
+var count = 0
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	count = count + 1
+	
+	if (count % 60 == 0):
+		print("parent node")
+	pass
+```
+
+# 3. CanvasItem节点
+
 - CanvasItem节点，CanvasItem -> Node
 
+- Canvas是画布的意思，所以CanvasItem代表了就是可以被绘制节点
+
+- CanvasItem是按树的树的深度优先遍历顺序绘制的
+- 默认情况下，子项在其父项的顶部，所以根CanvasItem将被画在所有项的后面
+- 可以通过设置CanvasItem的Show Behind Parent来改变最终渲染到屏幕上的画面顺序
+
 ```
 所有2d节点都要继承的节点，设置可视化，设置材质的颜色
 ```
 
+# 4. Node2D节点
+
 - Node2D节点，Node2d -> CanvasItem -> Node
 
 ```

doc/demo01_hello/image/node2d-01.JPG.import

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="StreamTexture"
+path="res://.import/node2d-01.JPG-08ad83c39fc41db8695db0d7520e3e64.stex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://doc/demo01_hello/image/node2d-01.JPG"
+dest_files=[ "res://.import/node2d-01.JPG-08ad83c39fc41db8695db0d7520e3e64.stex" ]
+
+[params]
+
+compress/mode=0
+compress/lossy_quality=0.7
+compress/hdr_mode=0
+compress/bptc_ldr=0
+compress/normal_map=0
+flags/repeat=0
+flags/filter=true
+flags/mipmaps=false
+flags/anisotropic=false
+flags/srgb=2
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/HDR_as_SRGB=false
+process/invert_color=false
+stream=false
+size_limit=0
+detect_3d=true
+svg/scale=1.0