1. 瞄准星

1 /**画瞄准星*/ 2     private void drawSight(){ 3         debugRenderer.begin(ShapeRenderer.ShapeType.Line); 4         float w = 50; 5         float h = 40; 6         Rectangle rect = new Rectangle((Gdx.graphics.getWidth()-w)/2, (Gdx.graphics.getHeight()-h)/2, w, h); 7         debugRenderer.setColor(new Color(0, 1, 0, 1)); 8         debugRenderer.rect(rect.x, rect.y, rect.width, rect.height); 9 10         //画十字线11         debugRenderer.line((Gdx.graphics.getWidth()-2*w)/2,Gdx.graphics.getHeight()/2,(Gdx.graphics.getWidth()+2*w)/2,Gdx.graphics.getHeight()/2);12         debugRenderer.line(Gdx.graphics.getWidth()/2,(Gdx.graphics.getHeight()-2*h)/2,Gdx.graphics.getWidth()/2,(Gdx.graphics.getHeight()+2*h)/2);13         debugRenderer.end();14     }

debugRenderer = new ShapeRenderer();debugRenderer.setProjectionMatrix(stage.getCamera().combined);

 

其中stage是ui用的，比如显示个FPS之类的，或者其他用户界面

效果图：

 

 

2. 隐藏鼠标指针

1 /**隐藏鼠标指针*/ 2     private void hideCursor(){ 3         if (Gdx.app.getType() != Application.ApplicationType.Desktop) 4             return; 5         if (emptyCursor == null) { 6             if (Mouse.isCreated()) { 7                 int min = org.lwjgl.input.Cursor.getMinCursorSize(); 8                 IntBuffer tmp = BufferUtils.newIntBuffer(min * min); 9                 try {10                     emptyCursor = new org.lwjgl.input.Cursor(min, min, min / 2, min / 2, 1, tmp, null);11                 } catch (LWJGLException e) {12                     e.printStackTrace();13                 }14             } else {15                 System.out.println("Could not create empty cursor before Mouse object is created");16             }17         }18         if (Mouse.isInsideWindow())19             try {20                 Mouse.setNativeCursor(false ? null : emptyCursor);21             } catch (LWJGLException e) {22                 e.printStackTrace();23             }24     }

private org.lwjgl.input.Cursor emptyCursor;

我抄来的，详情见：https://gist.github.com/mattdesl/4255483 

 

 

//TODO 准星在调整窗口大小后有问题。