私がこの権利を理解しているなら、あなたはあなたのゲームエンジンのためのアニメーションクラスを作りたいですか？
私のゲームエンジンには、と呼ばれるクラスがあります。このクラスはSpriteSheetAnimation、基本的に、updateメソッドが呼び出されると、アニメーションのすべてのフレームを反復処理します。その背後にあるロジックを理解し、それを使用する方法を見つけることができると確信しています。 ：
public class SpriteSheetAnimation extends GameObjectTemplate {
int animationSheetLength;
int animationSheetHeight;
int columns;
int rows;
Rect srcRect;
int left;
int bottom;
int lengthOfSpriteInSheet;
int heightOfSpriteInSheet;
boolean repeatAnimation;
boolean animationCompleted;
boolean animationStarted;
Bitmap bitmap;
/**
* You input a bitmap and the number of sprites (by defining the number of rows and columns), and this class will
* take care of animating the sheet.
*
*/
public SpriteSheetAnimation(WorldTemplate world, Bitmap animationSheet, int amountOfRows, int amountOfColumns) {
super(world);
this.animationSheetLength = animationSheet.getWidth();
this.animationSheetHeight = animationSheet.getHeight();
this.columns = amountOfColumns;
this.rows = amountOfRows;
this.lengthOfSpriteInSheet = this.animationSheetLength/this.columns;
this.heightOfSpriteInSheet = this.animationSheetHeight/this.rows;
srcRect = new Rect();
left = 0;
bottom = this.heightOfSpriteInSheet;
repeatAnimation = false;
animationCompleted = false;
animationStarted = false;
this.bitmap = animationSheet;
this.drawShapesOfSprites = true;
this.gameObjectShape.addRectangle(new Rect(0, 0, 0 + this.heightOfSpriteInSheet, 0 + this.lengthOfSpriteInSheet));
}
@Override
public void defineGameObjectPositionShape() {
this.gameObjectShape.addRectangle(new Rect());
}
/**
* <b><i>public Rect getSrcRect()</i></b>
* <br>
* Since: API 1
* <br>
* <br>
* Retrieve the rect that will cover the current source of the sheet.
*
* @return
* The current rect that will cover the current source of the sheet.
*
*/
public Rect getSrcRect() {
return srcRect;
}
/**
* <b><i>public Rect getDstRect()</i></b>
* <br>
* Since: API 1
* <br>
* <br>
* Retrieve the rect where the bitmap will be scaled to fit into.
*
* @return
* The current rect where the bitmap will be scaled to fit into.
*
*/
public Rect getDstRect() {
return this.getGameObjectPositionRect();
}
/**
* <b><i>public void repeatAnimation(boolean repetition)</i></b>
* <br>
* Since: API 1
* <br>
* <br>
* This method will set if the animation should be repeated or not.
*
* @param state
* <br><br>
* 1. True = The animation will repeat once completed and keep on doing so.
* <br><br>
* 2. False = The animation will play only once.
*
*
*/
public void repeatAnimation(boolean repetition) {
this.repeatAnimation = repetition;
}
/**
* <b><i>public boolean isAnimationFinished()</i></b>
* <br>
* Since: API 1
* <br>
* <br>
* Retrieve if the animation has finished.
*
* @return
* If the animation has finished.
*
*/
public boolean isAnimationFinished() {
return animationCompleted;
}
/**
* <b><i>public boolean hasBeenStarted()</i></b>
* <br>
* Since: API 1
* <br>
* <br>
* Retrieve if the animation has started.
*
* @return
* If the animation has started.
*
*/
public boolean hasBeenStarted() {
return animationStarted;
}
/**
* <b><i>public void render()</i></b>
* <br>
* Since: API 1
* <br>
* <br>
* This method will render the animation (the current picture of the sheet).
*
*/
public void render() {
world.game.getGraphics().getCanvasGameScreen().drawBitmap(this.bitmap, this.getSrcRect(), this.getGameObjectPositionRect(), null);
}
/**
* <b><i>public void update()</i></b>
* <br>
* Since: API 1
* <br>
* <br>
* This method will update the animation.
*
*/
@Override
public void update() {
// Every update will advance to the next frame of the animation
// Set if animation has started
if(!animationStarted) {
animationStarted = true;
}
// Set the frame
srcRect.set(left, (bottom - this.heightOfSpriteInSheet), (left + this.lengthOfSpriteInSheet), bottom);
// Change the location, so the next time the frame is set, it will be set accordingly
left = left + this.lengthOfSpriteInSheet;
if(left == this.animationSheetLength && bottom == this.animationSheetHeight) {
if(repeatAnimation == true) {
left = 0;
bottom = 0;
}
else {
animationCompleted = true;
}
}
if(left == this.animationSheetLength) {
bottom = bottom + this.heightOfSpriteInSheet;
left = 0;
}
}
}
これがお役に立てば幸いです。