游戏入门之一 雷电 精灵模型
????? 设计游戏我个人认为一个好的角色操作将事半工倍。所以我现在把雷电的所有角色抽象成一个Fairy。里面有实现绘制的方法以及移动，碰撞算法。
????? 在这里我强调下，我的碰撞算法是简单的实现。就是一个物体为参照物体。在10像素范围内x，y轴如果发现另外一个物体侵入则判断为true，发之为false
java 代码?

1. ???
2. package?org.wuhua.game.model;??
3. ??
4. import?javax.microedition.lcdui.Graphics;??
5. import?javax.microedition.lcdui.Image;??
6. ??
7. import?org.wuhua.game.util.Log;??
8. ???
9. /**?
10. ?*?类名：Sprite.java?
    ??
11. ?*?编写日期:?2006-11-29?
    ?
12. ?*?程序功能描述：建立精灵物体模型?
    ?
13. ?*?Demo:?
    ?
14. ?*?Bug:?
    ?
15. ?*??
16. ?*?程序变更日期?：
    ??
17. ?*?变更作者?：
    ??
18. ?*?变更说明?：
    ?
19. ?*??
20. ?*?@author?wuhua?
    ??
21. ?*/??
22. public?class?Fairy?{??
23. ????static?Log?log?=?Log.getLog("Fairy");??
24. ????/**?
25. ?????*?position?of?Fairy?in?x?offset??
26. ?????*/??
27. ????int?x;?//?=?0;??
28. ??
29. ????/**?
30. ?????*?position?of?Fairy?in?y?offset??
31. ?????*/??
32. ????int?y;?//?=?0;??
33. ??
34. ????/**?
35. ?????*?width?of?layer??
36. ?????*/??
37. ????int?width;?//?=?0;??
38. ??
39. ????/**?
40. ?????*?height?of?layer?
41. ?????*/??
42. ????int?height;?//?=?0;??
43. ??
44. ????/**??
45. ?????*?If?the?Layer?is?visible?it?will?be?drawn?when?paint?
46. ?????*?is?called.?
47. ?????*/??
48. ????boolean?visible?=?true;??
49. ??????
50. ????/**?
51. ?????*?图片资源?
52. ?????*???
53. ?????*/??
54. ??????
55. ????Image?fairy;???
56. ??????
57. ????public?Fairy(Image?fairy,int?x,?int?y){??
58. ????????this.fairy?=?fairy;??
59. ????????this.x?=?x;??
60. ????????this.y?=?y;??
61. ????}??
62. ??????
63. ????public?void?setPosition(int?x,?int?y)?{??
64. ????????this.x?=?x;??
65. ????????this.y?=?y;??
66. ????}??
67. ??????
68. ????public?void?move(int?dx,?int?dy)?{????
69. ???????
70. ????????x?+=?dx;??
71. ????????y?+=?dy;??
72. ????}??
73. ??????
74. ????public?void?setVisible(boolean?visible)?{??
75. ????????this.visible?=?visible;??
76. ????}??
77. ??
78. ?????
79. ????public?final?boolean?isVisible()?{??
80. ????????return?visible;??
81. ????}??
82. ??
83. ????public?final?int?getHeight()?{??
84. ????????return?height;??
85. ????}??
86. ??
87. ????public?final?int?getWidth()?{??
88. ????????return?width;??
89. ????}??
90. ??
91. ????public?final?int?getX()?{??
92. ????????return?x;??
93. ????}??
94. ??
95. ????public?final?int?getY()?{??
96. ????????return?y;??
97. ????}??
98. ??????
99. ????public?void?paint(Graphics?g){??
100. ????????if?(g?==?null)?{??
101. ????????????throw?new?NullPointerException("Graphics?不存在");??
102. ????????}??
103. ????????if(this.visible){??
104. ????????????//log.debug("x="?+?x?+?"?y="?+?y);???
105. ????????????g.drawImage(fairy,?x,?y,??Graphics.TOP?|?Graphics.HCENTER);??
106. ????????}??
107. ????}??
108. ??
109. ????/**?
110. ?????*?进行简单的碰撞算法,?希望高手可以给个建议。?
111. ?????*?@param?f?
112. ?????*?@return?
113. ?????*/??
114. ????public?final?boolean?collidesWith(Fairy?f){??
115. ??????????
116. ???????
117. ????????if((f.getX()?>=?this.getX()?-?20?&&?f.getX()?<=?this.getX()?+?20)??
118. ????????????????&&??(f.getY()?>=?this.getY()?-?10??&&?f.getY()?<=?this.getY()+10?)){??
119. ????????????//log.debug("this.getY="?+?this.getY());??
120. ????????????//log.debug("f.getY="?+?f.getY());??
121. ???????????????
122. ???????????????
123. ????????????return?true;??
124. ????????}??
125. ??????????????
126. ????????return?false;??
127. ????}??
128. ???
129. ??
130. }??

1 楼 lordhong 2006-12-04 好，关注中。。。