cocos2d-x for android：士兵听我的命令移动
2012-11-11 20:49 Terry_龙 阅读(8486) 评论(3) 编辑 收藏 举报上一篇文章讲述了利用cocos2d-x构建精灵的动画效果，今天打算以此为引子，创建一个在移动时同时指挥角色到我手指触摸的移动地点，那么就开始吧。
开始
本篇要点
- 角色(Sprite)缓存
- 动画(Animation)缓存
- 触摸(Touch)精灵到我指定的移动地点
- 动作(Action)移动和切换
涉及到的要学的学习点：
角色缓存
角色缓存使用CCSpriteFrameCache ，配合CCSpriteBatchNode将图片*.plist和*.png 加载进内存，方便以后调用。
以上为动作序列图，图片名称为：sg.png.图片来源于博客园:nowpaper.
角色缓存代码如下：
CCSpriteFrameCache* cache=CCSpriteFrameCache::sharedSpriteFrameCache();
cache->addSpriteFramesWithFile("sg.plist");
sprite=CCSprite::createWithSpriteFrameName("A1_6.png");
sprite->setPosition(ccp(size.width-sprite->getContentSize().width,size.height/2));
spriteBatchNode=CCSpriteBatchNode::create("sg.png");
spriteBatchNode->addChild(sprite);
addChild(spriteBatchNode);
cache->addSpriteFramesWithFile("sg.plist");
sprite=CCSprite::createWithSpriteFrameName("A1_6.png");
sprite->setPosition(ccp(size.width-sprite->getContentSize().width,size.height/2));
spriteBatchNode=CCSpriteBatchNode::create("sg.png");
spriteBatchNode->addChild(sprite);
addChild(spriteBatchNode);
以上代码，CCSpriteFrameCache负责加载sg.plist，CCSpriteBatchNode负责加载sg.png，然后创建一个精灵指定初始化位置和精灵纹理，并添加进CCSpriteBatchNode。通过上面的代码即可以将一个plist序列图加载进缓存了，你要做的就是将这些缓存的数据拿出来操作它。
动画缓存
上面己经将数据加载进缓存了，可以使用其中的那些节点来制作动画缓存了。
缓存动画使用 CCAnimationCache，该动画同样需要使用到plist文件，代码如下
CCAnimationCache *animCache = CCAnimationCache::sharedAnimationCache();
animCache->addAnimationsWithFile("sg.plist");
animCache->addAnimationsWithFile("sg.plist");
在将plist文件添加完后，即可以通过动画Animation将每一个动画的Animation添加进CCAnimationCache了，这里我写了一个函数，代码见下方
CCAction* HelloWorld::createAction(int begin,int end,char* cacheActionName,CCPoint point){
CCAnimationCache *animCache = CCAnimationCache::sharedAnimationCache();//得到一个缓存对象
CCArray *array = CCArray::createWithCapacity(end-begin);
char name[20];
for(int i = begin ;i<end;i++){
sprintf(name,"A1_%d.png",i);
CCSpriteFrame* frame =cache->spriteFrameByName(name);
array->addObject(frame);
}//以上创建一个动作序列集合
CCAnimation *plistAnimation = CCAnimation::createWithSpriteFrames(array,0.2f);//通过动作序列集合创建animation
animCache->addAnimation(plistAnimation, cacheActionName);//添加进缓存并指定缓存名称
array->removeAllObjects();
CCAnimation *animation = animCache->animationByName(cacheActionName);//通过缓存名称得到一个动画
animation->setRestoreOriginalFrame(true);
CCAnimate *ani=CCAnimate::create(animation);
CCActionInterval* plistSeq=(CCActionInterval*)(CCSequence::create(ani,
CCFlipX::create(point.x>0? true:false),
ani->copy()->autorelease(),
NULL
));
return CCRepeatForever::create(plistSeq);//创建动画并返回Action
}
CCAnimationCache *animCache = CCAnimationCache::sharedAnimationCache();//得到一个缓存对象
CCArray *array = CCArray::createWithCapacity(end-begin);
char name[20];
for(int i = begin ;i<end;i++){
sprintf(name,"A1_%d.png",i);
CCSpriteFrame* frame =cache->spriteFrameByName(name);
array->addObject(frame);
}//以上创建一个动作序列集合
CCAnimation *plistAnimation = CCAnimation::createWithSpriteFrames(array,0.2f);//通过动作序列集合创建animation
animCache->addAnimation(plistAnimation, cacheActionName);//添加进缓存并指定缓存名称
array->removeAllObjects();
CCAnimation *animation = animCache->animationByName(cacheActionName);//通过缓存名称得到一个动画
animation->setRestoreOriginalFrame(true);
CCAnimate *ani=CCAnimate::create(animation);
CCActionInterval* plistSeq=(CCActionInterval*)(CCSequence::create(ani,
CCFlipX::create(point.x>0? true:false),
ani->copy()->autorelease(),
NULL
));
return CCRepeatForever::create(plistSeq);//创建动画并返回Action
}
触摸精灵到我指定的移动地点
设定好让程序允许Touch之后，在回调函数ccTouchesEnded 里面通过捕获触摸位置指定精灵移动，代码见下方
CCTouch* touch=(CCTouch*)(touches->anyObject());
CCPoint location = touch ->getLocation();
float offX=location.x-sprite->getPosition().x;
float offY=location.y-sprite->getPosition().y;
walkAction=createAction(4,6,"move",ccp(offX,offY));
sprite->setFlipX(offX>0?true:false);
float realX=offY/offX;
CCPoint realDeast =ccp(location.x,location.y);
CCActionInterval *actionTo=CCMoveTo::create(2.2f,realDeast);
CCAction *moveToAction=CCSequence::create(
actionTo,
CCCallFunc::create(this,callfunc_selector(HelloWorld::moveDone)),
NULL
);
sprite->runAction(moveToAction);
CCPoint location = touch ->getLocation();
float offX=location.x-sprite->getPosition().x;
float offY=location.y-sprite->getPosition().y;
walkAction=createAction(4,6,"move",ccp(offX,offY));
sprite->setFlipX(offX>0?true:false);
float realX=offY/offX;
CCPoint realDeast =ccp(location.x,location.y);
CCActionInterval *actionTo=CCMoveTo::create(2.2f,realDeast);
CCAction *moveToAction=CCSequence::create(
actionTo,
CCCallFunc::create(this,callfunc_selector(HelloWorld::moveDone)),
NULL
);
sprite->runAction(moveToAction);
ok了，精灵移动了，但你会发现，你想让精灵移动的时候不是一整张图片移动，而是边移动边两只脚在走路的移动，就像是我们人类一样，是走着过去的，而不是幽灵飘过去的，那么，我们要做些什么呢？
动作移动
其实，很简单 ，只要记住要精灵移动的时候即：MoveTo时，同时再让精灵执行一个动作即walk的动作，代码如下：
sprite->stopAllActions(); //因为Touch是无时无刻的，所以每当touch一次即停止当前的action
walkAction=createAction(4,6,"move",ccp(offX,offY));//构建一个walk的action
sprite->runAction(walkAction);//播放走的action
sprite->runAction(moveToAction);//播放moveTo的action
walkAction=createAction(4,6,"move",ccp(offX,offY));//构建一个walk的action
sprite->runAction(walkAction);//播放走的action
sprite->runAction(moveToAction);//播放moveTo的action
当到达指定地点时，希望让角色以站立的姿势站在屏幕上，这时我们需要在moveTo的callback函数里面调用，让其停止当前action，并重新执行站立的action,代码如下：
void HelloWorld::moveDone(){
sprite->stopAllActions();
CCAnimationCache *animCache = CCAnimationCache::sharedAnimationCache();
CCAnimation *standAnimation = animCache->animationByName("stand");
standAnimation->setRestoreOriginalFrame(true);
CCAnimate *standAni=CCAnimate::create(standAnimation);
CCActionInterval* s=(CCActionInterval*)(CCSequence::create(standAni,
standAni->copy()->autorelease(),
NULL
));
CCAction *frameAction=CCRepeatForever::create(s);
sprite->runAction(frameAction);
}
全部代码如下：
View Code 
1 using namespace cocos2d;
2 using namespace CocosDenshion;
3
4 #define LOG_TAG "main" ||- function
5 #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)
6
7 CCScene* HelloWorld::scene()
8 {
9 // 'scene' is an autorelease object
10 CCScene *scene = CCScene::create();
11
12 // 'layer' is an autorelease object
13 HelloWorld *layer = HelloWorld::create();
14
15 // add layer as a child to scene
16 scene->addChild(layer);
17
18 // return the scene
19 return scene;
20 }
21
22 // on "init" you need to initialize your instance
23 bool HelloWorld::init()
24 {
25 //////////////////////////////
26 // 1. super init first
27 if ( !CCLayer::init() )
28 {
29 return false;
30 }
31
32 this->setTouchEnabled(true);
33
34 CCSize size = CCDirector::sharedDirector()->getWinSize();
35 CCAnimationCache::purgeSharedAnimationCache();
36 CCAnimationCache *animCache = CCAnimationCache::sharedAnimationCache();
37
38 animCache->addAnimationsWithFile("sg.plist");
39
40
41
42 cache=CCSpriteFrameCache::sharedSpriteFrameCache();
43 cache->addSpriteFramesWithFile("sg.plist");
44
45 sprite=CCSprite::createWithSpriteFrameName("A1_6.png");
46 sprite->setPosition(ccp(size.width-sprite->getContentSize().width,size.height/2));
47 spriteBatchNode=CCSpriteBatchNode::create("sg.png");
48 spriteBatchNode->addChild(sprite);
49 addChild(spriteBatchNode);
50
51 cache->addSpriteFramesWithFile("hero.plist");
52 hero=CCSprite::createWithSpriteFrameName("Hero02_0.png");
53 hero->setPosition(ccp(hero->getContentSize().width,size.height/2));
54 heroBatchNode=CCSpriteBatchNode::create("hero.png");
55 heroBatchNode ->addChild(hero);
56 hero->setFlipX(true);
57
58 addChild(heroBatchNode);
59
60
61
62 attackArray =CCArray::createWithCapacity(4);
63 char attackName[20];
64 for(int i=0;i<4;i++){
65 sprintf(attackName,
66 "A1_%d.png",i);
67 CCSpriteFrame* frame =cache->spriteFrameByName(attackName);
68 attackArray->addObject(frame);
69 }
70 CCAnimation *attackAnimation =CCAnimation::createWithSpriteFrames(attackArray,0.2f);
71 CCAnimationCache::sharedAnimationCache()->addAnimation(attackAnimation, "attack");
72
73 attackArray->removeAllObjects();
74
75
76
77 standArray= CCArray::createWithCapacity(1);
78 char standName[20];
79 for(int i=6;i<7;i++){
80 sprintf(standName,
81 "A1_%d.png",i);
82 CCSpriteFrame* frame =cache->spriteFrameByName(standName);
83 standArray->addObject(frame);
84 }
85 CCAnimation *standAnimation =CCAnimation::createWithSpriteFrames(standArray,0.2f);
86 CCAnimationCache::sharedAnimationCache()->addAnimation(standAnimation, "stand");
87 standArray->removeAllObjects();
88
89
90 return true;
91 }
92
93 void HelloWorld::moveDone(){
94 //
95 sprite->stopAllActions();
96 CCAnimationCache *animCache = CCAnimationCache::sharedAnimationCache();
97
98
99 CCAnimation *standAnimation = animCache->animationByName("stand");
100 standAnimation->setRestoreOriginalFrame(true);
101 CCAnimate *standAni=CCAnimate::create(standAnimation);
102 CCActionInterval* s=(CCActionInterval*)(CCSequence::create(standAni,
103 standAni->copy()->autorelease(),
104 NULL
105 ));
106 CCAction *frameAction=CCRepeatForever::create(s);
107
108
109 sprite->runAction(frameAction);
110 }
111
112 CCAction* HelloWorld::createAction(int begin,int end,char* cacheActionName,CCPoint point){
113 CCAnimationCache *animCache = CCAnimationCache::sharedAnimationCache();
114 CCArray *array = CCArray::createWithCapacity(end-begin);
115
116 char name[20];
117 for(int i = begin ;i<end;i++){
118 sprintf(name,"A1_%d.png",i);
119 CCSpriteFrame* frame =cache->spriteFrameByName(name);
120 array->addObject(frame);
121 }
122
123 CCAnimation *plistAnimation = CCAnimation::createWithSpriteFrames(array,0.2f);
124 CCAnimationCache::sharedAnimationCache()->addAnimation(plistAnimation, cacheActionName);
125
126 array->removeAllObjects();
127
128 CCAnimation *animation = animCache->animationByName(cacheActionName);
129 animation->setRestoreOriginalFrame(true);
130 CCAnimate *ani=CCAnimate::create(animation);
131 CCActionInterval* plistSeq=(CCActionInterval*)(CCSequence::create(ani,
132 CCFlipX::create(point.x>0? true:false),
133 ani->copy()->autorelease(),
134 NULL
135 ));
136 return CCRepeatForever::create(plistSeq);
137 }
138
139
140 void HelloWorld::registerWithTouchDispatcher(){
141 CCDirector::sharedDirector()->getTouchDispatcher()->addStandardDelegate(this,0);
142 }
143 void HelloWorld::ccTouchesEnded(cocos2d::CCSet * touches,cocos2d::CCEvent * event){
144
145 sprite->stopAllActions();
146
147
148 CCTouch* touch=(CCTouch*)(touches->anyObject());
149 CCPoint location = touch ->getLocation();
150 float offX=location.x-sprite->getPosition().x;
151 float offY=location.y-sprite->getPosition().y;
152
153 walkAction=createAction(4,6,"move",ccp(offX,offY));
154
155 sprite->setFlipX(offX>0?true:false);
156
157
158 float realX=offY/offX;
159 CCPoint realDeast =ccp(location.x,location.y);
160 CCActionInterval *actionTo=CCMoveTo::create(2.2f,realDeast);
161 CCAction *moveToAction=CCSequence::create(
162 actionTo,
163 CCCallFunc::create(this,callfunc_selector(HelloWorld::moveDone)),
164 NULL
165 );
166
167 sprite->runAction(walkAction);
168 sprite->runAction(moveToAction);
169 }
170
171
172 void HelloWorld::menuCloseCallback(CCObject* pSender)
173 {
174 CCDirector::sharedDirector()->end();
175
176 #if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
177 exit(0);
178 #endif
179
2 using namespace CocosDenshion;
3
4 #define LOG_TAG "main" ||- function
5 #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)
6
7 CCScene* HelloWorld::scene()
8 {
9 // 'scene' is an autorelease object
10 CCScene *scene = CCScene::create();
11
12 // 'layer' is an autorelease object
13 HelloWorld *layer = HelloWorld::create();
14
15 // add layer as a child to scene
16 scene->addChild(layer);
17
18 // return the scene
19 return scene;
20 }
21
22 // on "init" you need to initialize your instance
23 bool HelloWorld::init()
24 {
25 //////////////////////////////
26 // 1. super init first
27 if ( !CCLayer::init() )
28 {
29 return false;
30 }
31
32 this->setTouchEnabled(true);
33
34 CCSize size = CCDirector::sharedDirector()->getWinSize();
35 CCAnimationCache::purgeSharedAnimationCache();
36 CCAnimationCache *animCache = CCAnimationCache::sharedAnimationCache();
37
38 animCache->addAnimationsWithFile("sg.plist");
39
40
41
42 cache=CCSpriteFrameCache::sharedSpriteFrameCache();
43 cache->addSpriteFramesWithFile("sg.plist");
44
45 sprite=CCSprite::createWithSpriteFrameName("A1_6.png");
46 sprite->setPosition(ccp(size.width-sprite->getContentSize().width,size.height/2));
47 spriteBatchNode=CCSpriteBatchNode::create("sg.png");
48 spriteBatchNode->addChild(sprite);
49 addChild(spriteBatchNode);
50
51 cache->addSpriteFramesWithFile("hero.plist");
52 hero=CCSprite::createWithSpriteFrameName("Hero02_0.png");
53 hero->setPosition(ccp(hero->getContentSize().width,size.height/2));
54 heroBatchNode=CCSpriteBatchNode::create("hero.png");
55 heroBatchNode ->addChild(hero);
56 hero->setFlipX(true);
57
58 addChild(heroBatchNode);
59
60
61
62 attackArray =CCArray::createWithCapacity(4);
63 char attackName[20];
64 for(int i=0;i<4;i++){
65 sprintf(attackName,
66 "A1_%d.png",i);
67 CCSpriteFrame* frame =cache->spriteFrameByName(attackName);
68 attackArray->addObject(frame);
69 }
70 CCAnimation *attackAnimation =CCAnimation::createWithSpriteFrames(attackArray,0.2f);
71 CCAnimationCache::sharedAnimationCache()->addAnimation(attackAnimation, "attack");
72
73 attackArray->removeAllObjects();
74
75
76
77 standArray= CCArray::createWithCapacity(1);
78 char standName[20];
79 for(int i=6;i<7;i++){
80 sprintf(standName,
81 "A1_%d.png",i);
82 CCSpriteFrame* frame =cache->spriteFrameByName(standName);
83 standArray->addObject(frame);
84 }
85 CCAnimation *standAnimation =CCAnimation::createWithSpriteFrames(standArray,0.2f);
86 CCAnimationCache::sharedAnimationCache()->addAnimation(standAnimation, "stand");
87 standArray->removeAllObjects();
88
89
90 return true;
91 }
92
93 void HelloWorld::moveDone(){
94 //
95 sprite->stopAllActions();
96 CCAnimationCache *animCache = CCAnimationCache::sharedAnimationCache();
97
98
99 CCAnimation *standAnimation = animCache->animationByName("stand");
100 standAnimation->setRestoreOriginalFrame(true);
101 CCAnimate *standAni=CCAnimate::create(standAnimation);
102 CCActionInterval* s=(CCActionInterval*)(CCSequence::create(standAni,
103 standAni->copy()->autorelease(),
104 NULL
105 ));
106 CCAction *frameAction=CCRepeatForever::create(s);
107
108
109 sprite->runAction(frameAction);
110 }
111
112 CCAction* HelloWorld::createAction(int begin,int end,char* cacheActionName,CCPoint point){
113 CCAnimationCache *animCache = CCAnimationCache::sharedAnimationCache();
114 CCArray *array = CCArray::createWithCapacity(end-begin);
115
116 char name[20];
117 for(int i = begin ;i<end;i++){
118 sprintf(name,"A1_%d.png",i);
119 CCSpriteFrame* frame =cache->spriteFrameByName(name);
120 array->addObject(frame);
121 }
122
123 CCAnimation *plistAnimation = CCAnimation::createWithSpriteFrames(array,0.2f);
124 CCAnimationCache::sharedAnimationCache()->addAnimation(plistAnimation, cacheActionName);
125
126 array->removeAllObjects();
127
128 CCAnimation *animation = animCache->animationByName(cacheActionName);
129 animation->setRestoreOriginalFrame(true);
130 CCAnimate *ani=CCAnimate::create(animation);
131 CCActionInterval* plistSeq=(CCActionInterval*)(CCSequence::create(ani,
132 CCFlipX::create(point.x>0? true:false),
133 ani->copy()->autorelease(),
134 NULL
135 ));
136 return CCRepeatForever::create(plistSeq);
137 }
138
139
140 void HelloWorld::registerWithTouchDispatcher(){
141 CCDirector::sharedDirector()->getTouchDispatcher()->addStandardDelegate(this,0);
142 }
143 void HelloWorld::ccTouchesEnded(cocos2d::CCSet * touches,cocos2d::CCEvent * event){
144
145 sprite->stopAllActions();
146
147
148 CCTouch* touch=(CCTouch*)(touches->anyObject());
149 CCPoint location = touch ->getLocation();
150 float offX=location.x-sprite->getPosition().x;
151 float offY=location.y-sprite->getPosition().y;
152
153 walkAction=createAction(4,6,"move",ccp(offX,offY));
154
155 sprite->setFlipX(offX>0?true:false);
156
157
158 float realX=offY/offX;
159 CCPoint realDeast =ccp(location.x,location.y);
160 CCActionInterval *actionTo=CCMoveTo::create(2.2f,realDeast);
161 CCAction *moveToAction=CCSequence::create(
162 actionTo,
163 CCCallFunc::create(this,callfunc_selector(HelloWorld::moveDone)),
164 NULL
165 );
166
167 sprite->runAction(walkAction);
168 sprite->runAction(moveToAction);
169 }
170
171
172 void HelloWorld::menuCloseCallback(CCObject* pSender)
173 {
174 CCDirector::sharedDirector()->end();
175
176 #if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
177 exit(0);
178 #endif
179
注意点
CCAnimation *attackAnimation =CCAnimation::createWithSpriteFrames(attackArray,0.2f); 与CCAnimation *attackAnimation =CCAnimation::createWithSpriteFrames(attackArray);因为站立action才一帧，所以我不打算指定时间，但是如果不指定时间，它无法成功切换action，这个目前还不清楚是为什么。
最后实现的效果如下：
由于是在ubuntu下开发，好像没有什么抓取屏幕gif 图片的软件可用，简单截一屏！！！
代码没有做任何的处理，很多多余的代码，做个DEMO可以看看就行！！！
代码下载：https://github.com/terryyhl/SpriteAnimation.git
