Question

我有我的形象（为了解释，我们称之为Image.png）并且我试图将其扩展到适合我所绘制的我的身体。主体和一切都与调试一起工作，但我不是它的粉丝..我正在使用SpriteBatch将背景图像绘制到屏幕上（这也很适合）。如何将Image.png缩放到与已渲染的动态主体相同的大小/位置？

修改在绘制图像时，我无法让它们与调试渲染机构相匹配..

创建身体：

                BodyDef bodydef2 = new BodyDef();  
                bodydef2.type = BodyType.DynamicBody;  
                bodydef2.position.set(camera.viewportWidth + 30.0f, (int)(Math.random()*camera.viewportHeight)%(LastPlatformY+5)+20);  
                //System.out.println(bodydef2.position.y + " " + LastPlatformY);
                Body block = world.createBody(bodydef2);  
                PolygonShape Shape2 = new PolygonShape();  
                Shape2.setAsBox(750*WORLD_TO_BOX, 200*WORLD_TO_BOX);  
                FixtureDef fixtureDef2 = new FixtureDef();  
                fixtureDef2.shape = Shape2;  
                fixtureDef2.density = 1000.0f; 
                fixtureDef2.friction = 0.0f;  
                fixtureDef2.restitution = 0; 
                block.setLinearVelocity(new Vector2((float) (Platform_Velocity*-1), 0));
                block.createFixture(fixtureDef2); 
                //Lock 'block' to X-Axis, Relative to floor.
                PrismaticJointDef jointDef = new PrismaticJointDef();
                jointDef.collideConnected = true;
                jointDef.initialize(block, groundBody, block.getWorldCenter(), new Vector2(1, 0)); 
                world.createJoint(jointDef);
                Platforms.add(block);
                Platforms_Created++;
                LastPlatformY = (int)bodydef2.position.y;

绘图图片：

sp.draw(platforms, (float)(Platforms.get(i).getPosition().x), (float)(Platforms.get(i).getPosition().y), 75,20);

编辑＃2： 事实证明，如果您的相机小于屏幕尺寸，您必须做一些补偿以解释位置的变化。问题解决了，谢谢！

Answer 1

在创建身体时，只需将身体大小保存为两个变量，然后调用appropriate绘制方法。要获取对象的位置，请调用body.getPosition（）。

例如

Texture t = assetManager.get("your texture", Texture.class);

BodyDef bodyDef = new BodyDef();
body.type = BodyType.DynamicBody

float width = 64 * WORLD_TO_BOX;
float height = 64 * WORLD_TO_BOX;

Shape shape = new PolygonShape();
float[] points = new float[]{0,0,width,0,width,height,0, height};
shape.set(points);
FixtureDef def = new FixtureDef();
def.shape = shape;
...
body.createFixture(def);
shape.dispose();

以后当你想画画时

public void render(Spritebatch batch) {
    batch.draw(t, body.getPosition().x * BOX_TO_WORLD, body.getPosition().y * BOX_TO_WORLD, width * BOX_TO_WORLD, height * BOX_TO_WORLD);
}

使用LibGDX SpriteBatches缩放图像

1 个答案: