Tutorial 04a - 燈光的使用

重點API：
sandy.primitive.Box;
sandy.primitive.Cylinder;
sandy.primitive.PrimitiveMode;
sandy.primitive.Sphere;

1. package
2. {
3. import flash.display.Sprite;
4. import flash.events.Event;
5. import flash.events.KeyboardEvent;
6. import flash.ui.Keyboard;
7. import sandy.core.Scene3D;
8. import sandy.core.scenegraph.Camera3D;
9. import sandy.core.scenegraph.Group;
10. import sandy.core.scenegraph.TransformGroup;
11. import sandy.materials.Appearance;
12. import sandy.materials.attributes.CylinderEnvMap;
13. import sandy.materials.attributes.LightAttributes;
14. import sandy.materials.attributes.LineAttributes;
15. import sandy.materials.attributes.MaterialAttributes;
16. import sandy.materials.ColorMaterial;
17. import sandy.materials.Material;
18. import sandy.primitive.Box;
19. import sandy.primitive.Cylinder;
20. import sandy.primitive.PrimitiveMode;
21. import sandy.primitive.Sphere;
24. public class Example004a extends Sprite
25. {
26. private var scene:Scene3D;
27. private var camera:Camera3D;
28. private var tg:TransformGroup;
30. // 設定燈光 x, y, z 軸參數
31. private var lightX:Number = 0;
32. private var lightY:Number = 0;
33. private var lightZ:Number = 10;
35. public function Example004a()
36. {
37. camera = new Camera3D(300, 300);
38. camera.z = -400;
40. var root:Group = createScene();
42. scene = new Scene3D("scene", this, camera, root);
43. // 設定場景燈光的方向位置
44. scene.light.setDirection(lightX, lightY, lightZ);
46. addEventListener(Event.ENTER_FRAME,
47. enterFrameHandler);
48. stage.addEventListener(KeyboardEvent.KEY_DOWN,
49. keyPressed);
50. }
52. private function createScene():Group
53. {
54. var g:Group = new Group();
55. tg = new TransformGroup();
57. var materialAttr:MaterialAttributes =
58. new MaterialAttributes(
59. new LineAttributes(0, 0x2111BB, 0),
60. new LightAttributes(true, 0.1)
61. );
63. var material:Material = new ColorMaterial(
64. 0xFFCC33, 1, materialAttr
65. );
66. material.lightingEnable = true;
68. var app:Appearance = new Appearance(material);
70. var materialAttr2:MaterialAttributes =
71. new MaterialAttributes(
72. new LineAttributes(0, 0x2111BB, 0),
73. new LightAttributes(true, 0.1)
74. );
76. var material2:Material = new ColorMaterial(
77. 0xCC0000, 1, materialAttr
78. );
79. material2.lightingEnable = true;
81. var app2:Appearance = new Appearance(material2);
83. var materialAttr3:MaterialAttributes =
84. new MaterialAttributes(
85. new LineAttributes(0, 0x2111BB, 0),
86. new LightAttributes(true, 0.1)
87. );
89. var material3:Material = new ColorMaterial(
90. 0x008AE6, 1, materialAttr
91. );
92. material3.lightingEnable = true;
94. var app3:Appearance = new Appearance(material3);
96. // 產生一 Box 物件，並設定其參數，分別為：
97. // 識別名稱、寬、高、深度、face generation 及 Quility
98. var table:Box = new Box(
99. "table", 10, 150, 200, PrimitiveMode.QUAD, 1
100. );
101. //table.enableBackFaceCulling = false;
102. // 設定是否容許使用者改變呈現此 table 的方式
103. table.useSingleContainer = false;
104. // 設定 table 的外觀
105. table.appearance = app;
106. // 旋轉 table
107. table.rotateY = 90;
108. table.rotateX = 90;
110. // 產生一 Cylinder 物件，並設定其參數，分別為
111. // 識別名稱、半徑及高
112. var leg01:Cylinder = new Cylinder("leg01", 5, 80);
113. // 設定 leg01 的外觀
114. leg01.appearance = app;
115. // 設定 leg01 的 x，y，z 座標
116. leg01.x = -80;
117. leg01.y = -45;
118. leg01.z = 50;
120. var leg02:Cylinder = new Cylinder("lig02", 5, 80);
121. leg02.appearance = app;
122. leg02.x = 80;
123. leg02.y = -45;
124. leg02.z = 50;
126. var leg03:Cylinder = new Cylinder("leg03", 5, 80);
127. leg03.appearance = app;
128. leg03.x = -80;
129. leg03.y = -45;
130. leg03.z = -50;
132. var leg04:Cylinder = new Cylinder("leg04", 5, 80);
133. leg04.appearance = app;
134. leg04.x = 80;
135. leg04.y = -45;
136. leg04.z = -50;
138. // 產生一 Sphere 物件，並設定其參數，分別為：
139. // 識別名稱、半徑、水平切割數及垂直切割數
140. var mySphere:Sphere = new Sphere("theSphere", 20, 20, 8);
141. mySphere.useSingleContainer = true;
142. mySphere.appearance = app2;
143. mySphere.y = 25;
144. mySphere.x = -30;
146. var myBox:Box = new Box(
147. "theBox", 60, 60, 60, PrimitiveMode.TRI, 3
148. );
149. myBox.useSingleContainer = true;
150. myBox.appearance = app3;
151. myBox.rotateY = 30;
152. myBox.x = 40;
153. myBox.y = 35;
155. tg.addChild(table);
156. tg.addChild(leg01);
157. tg.addChild(leg02);
158. tg.addChild(leg03);
159. tg.addChild(leg04);
160. tg.addChild(mySphere);
161. tg.addChild(myBox);
163. tg.rotateX = 5;
165. g.addChild(tg);
167. return g;
168. }
170. private function enterFrameHandler(evt:Event):void
171. {
172. // 將場景顯示快取設定為 false
173. scene.render(false);
174. }
176. private function keyPressed(evt:KeyboardEvent):void
177. {
178. switch(evt.keyCode)
179. {
180. case Keyboard.PAGE_DOWN:
181. // 減少場景燈光的亮度
182. scene.light.setPower(scene.light.getPower() - 5);
183. break;
184. case Keyboard.PAGE_UP:
185. // 增加場景燈光的亮度
186. scene.light.setPower(scene.light.getPower() + 5);
187. break;
188. case Keyboard.UP:
189. lightY += 10;
190. scene.light.setDirection(lightX, lightY, lightZ);
191. break;
192. case Keyboard.DOWN:
193. lightY -= 10;
194. scene.light.setDirection(lightX, lightY, lightZ);
195. break;
196. case Keyboard.RIGHT:
197. lightX += 10;
198. scene.light.setDirection(lightX, lightY, lightZ);
199. break;
200. case Keyboard.LEFT:
201. lightX -= 10;
202. scene.light.setDirection(lightX, lightY, lightZ);
203. break;
204. }
205. }
206. }
207. }

產出：



程式碼出處：http://www.flashsandy.org/tutorials/3.0/sandy_cs3_tut041