Cocos2d-x
发布时间：2022-05-02 发布网站：大佬教程 code.js-code.com
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Create spritesheet
Have you seen this sort of image before? The first time I saw this I thought this is created using Photoshop,and I also have no idea how to use thisBIGimage in the game.
Until… I started to look in the game development,I only know that this is actually created byspritesheetprogram/app.
Here I will be usingTexturePacker.
Why? I have seen many game tutorials are talking about this,I tried it and found that it is very easy to use.
How to use demo
First of all,I’m going to do this in Cocos2d-x ENGIne,so SELEctCocos2dhere.
Now,drag images to thebox
Here I drag 3 bird images,and you can see the left pane,there arehero_01.png,hero_02.png,244)">hero_03.png,these are the original file name.
Once you’ve done,SELEctPublish sprite sheet
It will prompt you twice,one is to save the plist file contains the meta data of the original images such asframe,244)">offset,244)">rotated,etc. It may sound complicated,but no worry,Cocos2d-x will handle it.
The second prompt is to save the merged image.
And you’ve done.
Use in Cocos2d-x
File structure
InAppDelegate.cppapplicationDidFinishLaunching()@H_425_28@method,add
// 1. fix the resolution glview->setDesignResolutionSize(320, 480, ResolutionPolicy::EXACT_FIT); director->setContentScaleFactor(1); // 2. add search path for images std::vector<String> searchPaths; searchPaths.push_BACk("images"); FileUtils::geTinstance()->setSearchPaths(searchPaths); // 3. add sprite frame SpriteFrameCache::addSpriteFramesWithFile("hero.plist", "hero.png"); "images.plist",152)!important">"images.png"); |
- I’m a iPhone user,thus I fix the resolution to320 x 480for simplicity
- In this case,I put the sprite sheet underimagesdirectory,thus I add the search path
imagestoFileUtils
- Add sprite sheet to cache
Create a sprite object (bird in this casE)
I just name itHero. EditHero.h
#ifndef __HERO_SCENE_H__ #define __HERO_SCENE_H__ #include "cocos2d.h" class Hero : @H_167_262@public cocos2d::Sprite { @H_167_262@public: Hero(); @H_167_262@private: RepeatForever *@H_806_70@moving(); }; #endif // __HERO_SCENE_H__ |
andHero.cpp
#include "Hero.h" #include "GameScene.h" USING_NS_CC; Hero::Hero() { // 1. load a default image initWithSpriteFramename("hero_01.png"); // 2. run the move action @H_167_262@this->runAction(@H_806_70@moving()); } RepeatForever* @H_806_70@moving() { // 3. repeat the frame int numFrame = 3; Vector<SpriteFrame *> frames; SpriteFrameCache *frameCache = geTinstance(); char file[100] = {0}; @H_167_262@for (i = 0; i < numFrame; i++) { sprintf(file,152)!important">"hero_%02d.png",210)!important">i+1); SpriteFrame *frame = frameCache->getSpriteFrameByName(file); frames.pushBACk(frame); } Animation *animation = Animation::createWithSpriteFrames(frames, 0.3); Animate *animate = Animate::create(animation); repeat = RepeatForever::animate); @H_167_262@return repeat; } |
- Load an image for the Hero(a.k.a bird)by default during object instantiation
@H_347_208@make the bird fly by running the move action
- As we know that there are 3 images onhero.plist,thus fix it to 3. Then add all these 3 images(get from sprite frame cachE)to an array,and then repeat it forever.
Add hero to GameScene
EditGameScene.cpp,under theinit()@H_425_28@method,add the code below right beforereturnstatement
Hero *hero = @H_167_262@new Hero(); hero->setPosition(Point(visibleSize.width / 2,210)!important">height / 2)); addChild(hero); |
This is to instantiate aHeroobject,set the position to center of screen then add to current scene.
Run it and you will get the animated bird,see screenshot below.
Done.
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