我有问题我不知道如何将OnTouch方法中的值x和y传递给私有最终类MyRenderer并更新OnDrawFrame tex.draw（，x，y ,,,）函数x和y的值是能够平移我想用手指移动的对象。
任何指导都值得赞赏〜
public class Stage extends GLSurfaceView{
// Stage width and height
private float w, h;
// Screen width and height
private int screenWidth, screenHeight;
// Our native vertex buffer
private FloatBuffer vertexBuffer;
private Texture tex;
@Override
public boolean onTouchEvent(MotionEvent event) {
final int action = event.getAction() & MotionEvent.ACTION_MASK;
float x, y;
int pointerIndex;
int pointerId;
if (action == MotionEvent.ACTION_DOWN) {
pointerId = event.getPointerId(0);
x = event.getX();
y = event.getY();
pointerIndex = 0;
} else {
pointerIndex = event.getActionIndex();
pointerId = event.getPointerId(pointerIndex);
x = event.getX(pointerIndex);
y = event.getY(pointerIndex);
}
Log.v("this X", String.valueOf(x));
Log.v("this Y", String.valueOf(y));
return true;
}
public Stage(Context context, AttributeSet attrs) {
super(context, attrs);
setEGLConfigChooser(8, 8, 8, 8, 0, 0);
setRenderer(new MyRenderer());
setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
float vertices[] = {
-0.5f, -0.5f, 0.0f, // 0. left-bottom
0.5f, -0.5f, 0.0f, // 1. right-bottom
-0.5f, 0.5f, 0.0f, // 2. left-top
0.5f, 0.5f, 0.0f // 3. right-top
};
ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
vbb.order(ByteOrder.nativeOrder());
vertexBuffer = vbb.asFloatBuffer();
vertexBuffer.put(vertices);
vertexBuffer.position(0);
tex = new Texture(R.drawable.kdk);
}
private final class MyRenderer implements GLSurfaceView.Renderer {
public final void onDrawFrame(GL10 gl) {
gl.glClear(GLES10.GL_COLOR_BUFFER_BIT);
gl.glLoadIdentity();
tex.prepare(gl, GL10.GL_CLAMP_TO_EDGE);
gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
tex.draw(gl, w / 2, h / 2, tex.getWidth(), tex.getHeight(), 0);
}
public final void onSurfaceChanged(GL10 gl, int width, int height) {
gl.glClearColor(0, 0, 0, 0);
if(width > height) {
h = 600;
w = width * h / height;
} else {
w = 600;
h = height * w / width;
}
screenWidth = width;
screenHeight = height;
gl.glViewport(0, 0, screenWidth, screenHeight);
gl.glMatrixMode(GL10.GL_PROJECTION);
gl.glLoadIdentity();
gl.glOrthof(0, w, h, 0, -1, 1);
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glLoadIdentity();
}
public final void onSurfaceCreated(GL10 gl, EGLConfig config) {
// Set up alpha blending
gl.glEnable(GL10.GL_ALPHA_TEST);
gl.glEnable(GL10.GL_BLEND);
gl.glBlendFunc(GL10.GL_ONE, GL10.GL_ONE_MINUS_SRC_ALPHA);
// We are in 2D. Why needs depth?
gl.glDisable(GL10.GL_DEPTH_TEST);
// Enable vertex arrays (we'll use them to draw primitives).
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
// Enable texture coordination arrays.
gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
tex.load(getContext());
}
}
}
其他编码
How to apply drag drop and scale in Android OpenGL ES
最佳答案
为此，您必须将MyRenderer属性添加到Stage类。
此解决方案将起作用，但它可能不是最佳解决方案，因此可以置评。
您需要通过删除final语句来更改内部类MyRenderer的定义：
编辑：我不确定这一点，因为final class将其所有方法设置为final，但可能没有属性。如果有人可以回答，我会很高兴阅读。
私有最终类MyRenderer实现GLSurfaceView.Renderer
至
私有类MyRenderer实现GLSurfaceView.Renderer
在您的舞台课程中：
public class Stage extends GLSurfaceView {
// Stage width and height
private float w, h;
...
// The renderer
MyRenderer mRenderer;
...
public Stage(Context context, AttributeSet attrs) {
mRenderer = new MyRenderer();
super(context, attrs);
setEGLConfigChooser(8, 8, 8, 8, 0, 0);
setRenderer(mRenderer);
...
}
}
将设置器添加到MyRenderer类中：
private class MyRenderer implements GLSurfaceView.Renderer {
float xPos;
float yPos;
// ...
public void setX(float x) {
xPos = x;
}
public void setY(float y) {
yPos = y;
}
public void setXY(float x, float y) {
xPos = x;
yPos = y;
}
}
最后，在
OnTouch方法中设置这些值。编辑：
设置xPos和yPos默认值：
private class MyRenderer implements GLSurfaceView.Renderer {
float xPos;
float yPos;
boolean initialised = false;
...
public final void onSurfaceChanged(GL10 gl, int width, int height) {
if (!initialised) {
xPos = width /2;
yPos = height / 2;
initialised = true;
}
...
}
...
}
编辑2：
为了避免出现竞争状态，请使用一个功能同时设置X和Y值。输入方法时，它将创建临时变量，并带有传入参数的值。这将确保传递的x和y值来自同一事件。
private class MyRenderer implements GLSurfaceView.Renderer {
float xPos;
float yPos;
// ...
public void setXY(float x, float y) {
xPos = x;
yPos = y;
}
}