所以我试图在我的游戏中实现碰撞检测,我在tmx文件中有一个名为Collision的图层.LIBGDX现场教程不涉及与对象层的交互,很难弄清楚如何首先渲染地图.这就是我渲染屏幕的方式,我想学习如何获取碰撞图层,然后让我的精灵与它进行交互.
@Override
public void render(float delta) {
translateCamera();
Gdx.gl.glClearColor(0, 0, 0, 1);
Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
camera.update();
renderer.setView(camera);
renderer.render(bgLayers);
// renderer.render();
batch.begin();
batch.draw(playerDirect, Gdx.graphics.getWidth() / 2,
Gdx.graphics.getHeight() / 2);
batch.end();
renderer.render(fgLayers);
}
有一种方法可以使用对象层.不要放弃希望!
与使用tile属性相比,此方法的一个主要优点是可以轻松地生成更少,更大的实体,以提高Box2d的效率.而且,更好的是,这些身体可以是你想要的任何形状!我的游戏中的样本水平现在只有三个有趣的形状(看起来更有机体)ChainShape的身体,而不是几十个方形的身体.
在网络丛林深处严重打猎之后,我在GameDev上回答了同样的问题.我找到的教程对我来说并不是很有效,所以稍后编辑我想出了这个:
public class MapBodyBuilder {
// The pixels per tile. If your tiles are 16x16, this is set to 16f
private static float ppt = 0;
public static Array<Body> buildShapes(Map map, float pixels, World world) {
ppt = pixels;
MapObjects objects = map.getLayers().get("Obstacles").getObjects();
Array<Body> bodies = new Array<Body>();
for(MapObject object : objects) {
if (object instanceof TextureMapObject) {
continue;
}
Shape shape;
if (object instanceof RectangleMapObject) {
shape = getRectangle((RectangleMapObject)object);
}
else if (object instanceof PolygonMapObject) {
shape = getPolygon((PolygonMapObject)object);
}
else if (object instanceof PolylineMapObject) {
shape = getPolyline((PolylineMapObject)object);
}
else if (object instanceof CircleMapObject) {
shape = getCircle((CircleMapObject)object);
}
else {
continue;
}
BodyDef bd = new BodyDef();
bd.type = BodyType.StaticBody;
Body body = world.createBody(bd);
body.createFixture(shape, 1);
bodies.add(body);
shape.dispose();
}
return bodies;
}
private static PolygonShape getRectangle(RectangleMapObject rectangleObject) {
Rectangle rectangle = rectangleObject.getRectangle();
PolygonShape polygon = new PolygonShape();
Vector2 size = new Vector2((rectangle.x + rectangle.width * 0.5f) / ppt,
(rectangle.y + rectangle.height * 0.5f ) / ppt);
polygon.setAsBox(rectangle.width * 0.5f / ppt,
rectangle.height * 0.5f / ppt,
size,
0.0f);
return polygon;
}
private static CircleShape getCircle(CircleMapObject circleObject) {
Circle circle = circleObject.getCircle();
CircleShape circleShape = new CircleShape();
circleShape.setRadius(circle.radius / ppt);
circleShape.setPosition(new Vector2(circle.x / ppt, circle.y / ppt));
return circleShape;
}
private static PolygonShape getPolygon(PolygonMapObject polygonObject) {
PolygonShape polygon = new PolygonShape();
float[] vertices = polygonObject.getPolygon().getTransformedVertices();
float[] worldVertices = new float[vertices.length];
for (int i = 0; i < vertices.length; ++i) {
worldVertices[i] = vertices[i] / ppt;
}
polygon.set(worldVertices);
return polygon;
}
private static ChainShape getPolyline(PolylineMapObject polylineObject) {
float[] vertices = polylineObject.getPolyline().getTransformedVertices();
Vector2[] worldVertices = new Vector2[vertices.length / 2];
for (int i = 0; i < vertices.length / 2; ++i) {
worldVertices[i] = new Vector2();
worldVertices[i].x = vertices[i * 2] / ppt;
worldVertices[i].y = vertices[i * 2 + 1] / ppt;
}
ChainShape chain = new ChainShape();
chain.createChain(worldVertices);
return chain;
}
}
假设你已经设置好了你的瓷砖大小相当于你的Box2d中的1平方米(如果你愿意,1平方单位),那么它产生World的静态Bodys就是你在Tiled中绘制它们的确切位置.看到这种情况真是令人满意,相信你吧.