我刚刚了解 LIBGDX 库，需要将所有对象的颜色更改为不同深浅的紫色。我认为通过将相同类型的所有对象（例如钉、墙、捕手）放入数组列表中，然后迭代它们并在
render()Play这是我最初的想法：
sb.setColor(Color.PINK);
for (RoundPeg peg : pegs) {
peg.draw(sb);
}
我的相关代码：
公共游戏（GameStateManager gsm）{ 超级（GSM）；
world = new World(new Vector2(0, gravity), true);
world.setContactListener(new GameContactListener());
b2dr = new Box2DDebugRenderer();
int x= (int) (PPM/2); //feste x Pos evtl.
placePegs();
placeWalls();
placeCatchers();
// dropBall(MathUtils.random(100, 300));
dropBall(250);//siehe x
// Set up camera
b2dcam = new OrthographicCamera();
b2dcam.setToOrtho(false, Game.WIDTH / PPM, Game.HEIGHT / PPM);
}
private void placePegs() {
int numRows = 9;
pegs = new ArrayList<RoundPeg>();
for (int row = numRows; row >= 1; row--) {
for (int col = 1; col <= row; col++) {
int x = (int) (Game.WIDTH * (col + (numRows - row) / 2.0) * 10 / PPM); // x-Position
int y = (int) (Game.HEIGHT * (numRows - row + 1) * 8 / PPM); // y-Position
RoundPeg peg = new RoundPeg(x, y, world, Color.PURPLE);
pegs.add(peg);
}
}
// 9 Peg rows
/*for (int i = 10; i < 100; i = i + 10) {
for (int j = 10; j < 100; j = j + 10) {
RoundPeg peg = new RoundPeg((int) (Game.WIDTH * i / PPM), (int) ((Game.HEIGHT * j) / PPM), world);
}
}
// 3 Peg rows
for (int i = 25; i < 100; i = i + 25) {
for (int j = 120; j < 700; j = j + 160) {
RoundPeg peg = new RoundPeg((int) (Game.WIDTH * i / PPM), (int) j, world);
}
}
// 2 Peg Rows wide
for (int i = 15; i < 100; i = i + 70) {
for (int j = 200; j < 700; j = j + 160) {
RoundPeg peg = new RoundPeg((int) (Game.WIDTH * i / PPM), (int) j, world);
}
}
// 2 Peg rows narrow
for (int i = 35; i < 90; i = i + 30) {
RoundPeg peg = new RoundPeg((int) (Game.WIDTH * i / PPM), 355, world);
} */
}
private void placeWalls() {
BodyDef bdef;
FixtureDef fdef;
PolygonShape shape;
bdef = new BodyDef();
fdef = new FixtureDef();
shape = new PolygonShape();
// Left Wall
bdef.position.set(0 / PPM, 0 / PPM);
bdef.type = BodyDef.BodyType.StaticBody;
Body body = world.createBody(bdef);
shape.setAsBox(5 / PPM, Game.HEIGHT / PPM);
fdef.shape = shape;
fdef.filter.categoryBits = Box2dVars.BIT_WALLS;
fdef.filter.maskBits = Box2dVars.BIT_BALL;
body.createFixture(fdef).setUserData("wall");
// Right wall
bdef.position.set(Game.WIDTH / PPM, 0 / PPM);
bdef.type = BodyDef.BodyType.StaticBody;
Body body1 = world.createBody(bdef);
shape.setAsBox(5 / PPM, Game.HEIGHT / PPM);
fdef.shape = shape;
fdef.filter.categoryBits = Box2dVars.BIT_WALLS;
fdef.filter.maskBits = Box2dVars.BIT_BALL;
body1.createFixture(fdef).setUserData("wall");
// Bottom wall
bdef.position.set(0 / PPM, 0 / PPM);
bdef.type = BodyDef.BodyType.StaticBody;
Body body2 = world.createBody(bdef);
shape.setAsBox(Game.WIDTH / PPM, 5 / PPM);
fdef.shape = shape;
fdef.filter.categoryBits = Box2dVars.BIT_WALLS;
fdef.filter.maskBits = Box2dVars.BIT_BALL;
body2.createFixture(fdef).setUserData("wall");
}
private void placeCatchers() {
BodyDef bdef;
FixtureDef fdef;
PolygonShape shape;
bdef = new BodyDef();
fdef = new FixtureDef();
shape = new PolygonShape();
for (int i = 10; i < 100; i = i + 10) {
bdef.position.set((Game.WIDTH * i / PPM) / PPM, 0);
bdef.type = BodyDef.BodyType.StaticBody;
Body body = world.createBody(bdef);
shape.setAsBox(5 / PPM, 30 / PPM);
fdef.shape = shape;
fdef.filter.categoryBits = Box2dVars.BIT_WALLS;
fdef.filter.maskBits = Box2dVars.BIT_BALL;
body.createFixture(fdef).setUserData("wall");
System.out.println("placing catcher");
}
}
@Override
public void handleInput() {
}
//Bitmap
private void dropBall(int posX){
BodyDef bdef = new BodyDef();
FixtureDef fdef = new FixtureDef();
bdef.position.set(posX / PPM, 790 / PPM);
bdef.type = BodyDef.BodyType.DynamicBody;
// Randomly drop ball
Body body = world.createBody(bdef);
CircleShape cshape = new CircleShape();
cshape.setRadius(13 / PPM);
fdef.shape = cshape;
fdef.filter.categoryBits = Box2dVars.BIT_BALL;
fdef.filter.maskBits = Box2dVars.BIT_WALLS | Box2dVars.BIT_PEG;
fdef.restitution = 0.7f;
fdef.density = 0.9f;
fdef.friction = 0.1f;
body.createFixture(fdef).setUserData("ball");
}
@Override
public void update(float dt) {
world.step(dt, 6, 2);
}
@Override
public void render() {
Gdx.gl20.glClearColor(1, 1, 1, 1);
Gdx.gl20.glClear(GL20.GL_COLOR_BUFFER_BIT);
b2dr.render(world, b2dcam.combined);
}
@Override
public void dispose() {
world.dispose();
b2dr.dispose();
}
public class Game implements ApplicationListener {
public static final String TITLE = "Plinko";
public static final int WIDTH = 480;
public static final int HEIGHT = 800;
public static final float STEP = 1 / 60f;
private float accum;
private SpriteBatch sb;
private OrthographicCamera cam;
private OrthographicCamera hudCam;
private GameStateManager gsm;
@Override
public void create() {
sb = new SpriteBatch();
cam = new OrthographicCamera();
cam.setToOrtho(false, WIDTH, HEIGHT);
hudCam = new OrthographicCamera();
hudCam.setToOrtho(false, WIDTH, HEIGHT);
gsm = new GameStateManager(this);
}
@Override
public void render() {
accum += Gdx.graphics.getDeltaTime();
while (accum >- STEP) {
accum -= STEP;
gsm.update(STEP);
gsm.render();
}
}
@Override
public void resize(int width, int height) {
}
@Override
public void pause() {
}
@Override
public void resume() {
}
@Override
public void dispose() {
sb.dispose();
}
// Getters And Setters
public SpriteBatch getSpriteBatch() {
return sb;
}
public OrthographicCamera getCamera() {
return cam;
}
public OrthographicCamera getHUDCamera() {
return hudCam;
}
和
RoundPegpublic class RoundPeg {
private final com.badlogic.gdx.graphics.Color color;
private BodyDef bdef;
private FixtureDef fdef;
private PolygonShape shape;
private CircleShape cshape;
public RoundPeg(int posX, int posY, World world, com.badlogic.gdx.graphics.Color color) {
bdef = new BodyDef();
bdef.position.set(posX / PPM, posY / PPM);
fdef = new FixtureDef();
bdef.type = BodyDef.BodyType.StaticBody;
Body body = world.createBody(bdef);
cshape = new CircleShape();
cshape.setRadius(4 / PPM);
fdef.shape = cshape;
fdef.filter.categoryBits = Box2dVars.BIT_PEG;
fdef.filter.maskBits = Box2dVars.BIT_BALL;
body.createFixture(fdef).setUserData("peg");
this.color= color;
}
}
您需要为单个精灵而不是精灵批次设置颜色。