我试图根据LibGDX书中存在的代码做一些代码。将一些屏幕转换添加到流（在gles1中工作），并且由于LibGDX弃用了GL10，我试图将其重构为GL20。
我做了一些更改，其中大部分都是以不同的方式调用已弃用的函数或函数。但是我的最终结果并不接近可行，因为它使我的屏幕闪烁。
由于这个问题，我现在专注于桌面版本。
SplashScreen01.java
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.Texture.TextureFilter;
import com.badlogic.gdx.graphics.g2d.Sprite;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.math.Interpolation;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Image;
import com.badlogic.gdx.scenes.scene2d.ui.Stack;
import com.badlogic.gdx.scenes.scene2d.ui.Table;
import com.badlogic.gdx.utils.viewport.StretchViewport;
import com.packtpub.libgdx.canyonbunny.screens.transitions.ScreenTransition;
import com.packtpub.libgdx.canyonbunny.screens.transitions.ScreenTransitionSlice;
import com.packtpub.libgdx.canyonbunny.util.Constants;
public class SplashScreen01 extends AbstractGameScreen {
private static final String TAG = SplashScreen01.class.getName();
private Stage stage;
Texture splashTexture;
Sprite splashSprite;
boolean inTransition;
float screenTimingLeft;
private Image imgBackground;
// debug
private final float DEBUG_REBUILD_INTERVAL = 5.0f;
private boolean debugEnabled = false;
private float debugRebuildStage;
public SplashScreen01(DirectedGame app) {
super(app);
}
/*
* cycled function for each graphic frame renders the SplashScreen depending in the deltatime
* @param deltatime - graphics timer counter
*/
@Override
public void render(float deltaTime) {
checkNextScreen(deltaTime);
//clear screen with color GREY
Gdx.gl.glClearColor(126 / 255.0f, 126 / 255.0f, 126 / 255.0f, 1.0f);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
if (debugEnabled) {
debugRebuildStage -= deltaTime;
if (debugRebuildStage <= 0) {
debugRebuildStage = DEBUG_REBUILD_INTERVAL;
rebuildStage();
}
}
stage.act(deltaTime);
stage.draw();
// Table.drawDebug(stage);
}
/*
* Change the internal Viewport in case of a screen size alteration
*/
@Override
public void resize(int width, int height) {
stage.setViewport(new StretchViewport(Constants.VIEWPORT_GUI_WIDTH, Constants.VIEWPORT_GUI_HEIGHT));
}
/*
* First initialization of this class, first status initializer
*/
@Override
public void show() {
stage = new Stage();
try {
splashTexture = new Texture("images/LogoSingleGrey768h.png");
splashTexture.setFilter(TextureFilter.Linear, TextureFilter.Linear);
} catch (Exception e) {
//graphic Splash Screen: SomeOne Tempered the Game files system
}
screenTimingLeft = Constants.SPLASH_SCREEN_01_TOTAL_DURATION;
rebuildStage();
}
@Override
public void hide() {
splashTexture.dispose();
stage.dispose();
}
@Override
public void pause() {
}
/**
* Rebuild Stage preparing elements and gathering them together
*/
private void rebuildStage() {
// build all layers
Table layerBackground = buildBackgroundLayer();
// assemble stage for menu screen
stage.clear();
Stack stack = new Stack();
stage.addActor(stack);
stack.setSize(Constants.VIEWPORT_GUI_WIDTH, Constants.VIEWPORT_GUI_HEIGHT);
stack.add(layerBackground);
}
//check if it is time for next screen
private void checkNextScreen(float deltaTime) {
screenTimingLeft -= deltaTime;
if (!inTransition && screenTimingLeft < 0) {
inTransition = true;
//call next screen
ScreenTransition transition = ScreenTransitionSlice.init(Constants.SPLASH_SCREEN_02_ANIM_DURATION, ScreenTransitionSlice.UP_DOWN, 20, Interpolation.pow5Out);
game.setScreen(new SplashScreen02(game), transition);
}
}
/**
* Aggregates objects and actors for background layer
*
* @return layer - Table layer with the elements
*/
private Table buildBackgroundLayer() {
Table layer = new Table();
TextureRegion splashRegion = new TextureRegion(splashTexture, 0, 0, 768, 384);
imgBackground = new Image(splashRegion);
layer.add(imgBackground);
return layer;
}
@Override
public InputProcessor getInputProcessor() {
return stage;
}
}
ScreenTransitionSlice.java
/*******************************************************************************
* Copyright 2013 Andreas Oehlke
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.packtpub.libgdx.canyonbunny.screens.transitions;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.math.Interpolation;
import com.badlogic.gdx.utils.Array;
public class ScreenTransitionSlice implements ScreenTransition {
public static final int UP = 1;
public static final int DOWN = 2;
public static final int UP_DOWN = 3;
private static final ScreenTransitionSlice instance = new ScreenTransitionSlice();
private float duration;
private int direction;
private Interpolation easing;
private Array<Integer> sliceIndex = new Array<Integer>();
public static ScreenTransitionSlice init(float duration, int direction, int numSlices, Interpolation easing) {
instance.duration = duration;
instance.direction = direction;
instance.easing = easing;
// create shuffled list of slice indices which determines the order of slice animation
instance.sliceIndex.clear();
for (int i = 0; i < numSlices; i++)
instance.sliceIndex.add(i);
instance.sliceIndex.shuffle();
return instance;
}
@Override
public float getDuration() {
return duration;
}
@Override
public void render(SpriteBatch batch, Texture currScreen, Texture nextScreen, float alpha) {
float w = currScreen.getWidth();
float h = currScreen.getHeight();
float x = 0;
float y = 0;
int sliceWidth = (int) (w / sliceIndex.size);
Gdx.gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
batch.begin();
batch.draw(currScreen, 0, 0, 0, 0, w, h, 1, 1, 0, 0, 0, currScreen.getWidth(), currScreen.getHeight(), false, true);
if (easing != null)
alpha = easing.apply(alpha);
for (int i = 0; i < sliceIndex.size; i++) {
// current slice/column
x = i * sliceWidth;
// vertical displacement using randomized list of slice indices
float offsetY = h * (1 + sliceIndex.get(i) / (float) sliceIndex.size);
switch (direction) {
case UP:
y = -offsetY + offsetY * alpha;
break;
case DOWN:
y = offsetY - offsetY * alpha;
break;
case UP_DOWN:
if (i % 2 == 0) {
y = -offsetY + offsetY * alpha;
} else {
y = offsetY - offsetY * alpha;
}
break;
}
batch.draw(nextScreen, x, y, 0, 0, sliceWidth, h, 1, 1, 0, i * sliceWidth, 0, sliceWidth, nextScreen.getHeight(), false, true);
}
batch.end();
}
}
因为我并不真正知道哪个文件无法正常工作，所以任何想要帮助代码的人都在： https://bitbucket.org/LisarteBarbosa/canyonbunny/src/7da43bb21833cfc7c0037e55182f380d31d7e34b/core/src/com/packtpub/libgdx/canyonbunny/?at=master
答案 0 :(得分：0)
排名第一 - 注释掉代码非常令人困惑，我不知道它是否仍然被注释掉了。如果没有注释掉绘图代码，CanyonBunnyMain中的render方法肯定会导致闪烁。因为它会继续被调用，因为它是你的主要切入点。
public void render() {
/*
Gdx.gl.glClearColor(1, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); batch.begin(); batch.draw(img, 0, 0); batch.end();
*/
}
使render（）方法永远为空。这个类中唯一需要的代码就是create（）方法中的代码。但是，你仍然需要一个空的@Override for render（）。
第二 - 我怀疑你在SplashScreen01或SplashScreen02中不需要超级（app）。我会这样做（对他们两个人来说）
private float debugRebuildStage;
**private DirectedGame app;**
然后在你的构造函数中改变这个
public SplashScreen01(DirectedGame app) {
super(app);
}
到这个
public SplashScreen01(DirectedGame app) {
**this.app = app;**
}
因此，上面的app声明成为传递给构造函数的app。适用于SplashScreen01和SplashScreen02。所以你的游戏可以继续其完整性和＃34;完好。
我希望有帮助，......并解决您的问题。
约翰