Question

我刚刚学习了OpenGL，我正在使用OpenGL开发游戏。我不知道如何将OnTouch Event实现为image＆amp;移动图像我使用OpenGL文档示例OpenGLES 0.1但未完成

Answer 1

见下面的代码 -

@Override
public boolean onTouchEvent(MotionEvent event) 
{
    mX = (int) event.getX();
    mY = (int) event.getY();
    return super.onTouchEvent(event);
}

并按照此tutorial.它可以帮助您。

Answer 2

此链接非常有助于理解OpenGL中的TouchEvent概念

Detect user's touches over an OpenGL square

Answer 3

默认情况下，您可以使用以下代码处理活动中的触摸，

 @Override
        public boolean onTouch(View v, MotionEvent event) {

            final float mouseSensitivity = 0.5f;

            if(event.getAction()==MotionEvent.ACTION_DOWN){
                startX = event.getX();
                startY = event.getY();
            } else if(event.getAction()==MotionEvent.ACTION_UP){
                startX = 0.0f;
                startY = 0.0f;
            } else if(event.getAction()==MotionEvent.ACTION_MOVE){
                graphicsRenderer.rotate((startY - event.getY()) * mouseSensitivity,(startX - event.getX()) * mouseSensitivity);
                startX = event.getX();
                startY = event.getY();
            }

            return true;
        }

// Where startX and startY are global int variables;

为了处理GLSurface视图，请执行此操作，

class ClearGLSurfaceView extends GLSurfaceView {
    public ClearGLSurfaceView(Context context) {
        super(context);
        mRenderer = new ClearRenderer();
        setRenderer(mRenderer);
    }

    public boolean onTouchEvent(final MotionEvent event) {
        queueEvent(new Runnable(){
            public void run() {
                mRenderer.setColor(event.getX() / getWidth(),
                        event.getY() / getHeight(), 1.0f);
            }});
            return true;
        }

        ClearRenderer mRenderer;
}

Answer 4

首先，你实现了覆盖方法onTouchMethod，然后你就可以看到触摸每一个动作，如向下，向上和触摸时移动。

 @Override
    public boolean onTouch(View v, MotionEvent event) {

        if(event.getAction()==MotionEvent.ACTION_DOWN){
            Log.i(TAG,"Action Down");
        } else if(event.getAction()==MotionEvent.ACTION_UP){
             Log.i(TAG,"Action Up");
        } else if(event.getAction()==MotionEvent.ACTION_MOVE){
           Log.i(TAG,"Action Move");
        }
        return true;
    }

如何实现OnTouch事件

4 个答案: