我有麻烦了。我不知道如何将OnTouch方法中的值x和y传递给私有的最终类MyRenderer,并更新OnDrawFrame tex.draw(、x、y、)函数x和y值,以便能够转换我想用手指移动的对象。
如有任何指导,请注意~
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
发布于 2015-09-17 08:52:57
要实现这一点,您必须将MyRenderer属性添加到Stage类中。
这一解决方案将有效,但它可能不是最好的,所以可以自由评论。
final语句:
编辑:我对此并不确定,因为final class将将其所有方法设置为最终,但可能不会设置属性。如果有人能回答的话,我很乐意去读它。
私有最终类MyRenderer实现GLSurfaceView.Renderer至
私有类MyRenderer实现GLSurfaceView.Renderer
OnTouch方法中设置这些值。编辑:
若要设置xPos和yPos默认值,请执行以下操作:
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:
为了避免竞争条件,用一个函数同时设置X和Y值。当输入该方法时,它将使用传入参数的值创建临时变量。这将确保传递的x和y值来自同一个事件。
private class MyRenderer implements GLSurfaceView.Renderer {
float xPos;
float yPos;
// ...
public void setXY(float x, float y) {
xPos = x;
yPos = y;
}
}https://stackoverflow.com/questions/32625793
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