小编dot*_*ury的帖子

我只是在jsfiddle中乱搞,试图调整鼠标位置的盒子大小.当鼠标移开时使盒子变大是很简单的,只需要距离.但是,我想做相反的事情; 我希望盒子随着鼠标的移动而增大,随着鼠标的移动而减小.我还没有想出任何公式.我觉得我可能会有一些非常简单的东西.

<div id="box"></div>

#box { height: 100px; width: 100px; background: black; }

var box = document.getElementById('box');

// center point of the box
var boxX = 50;
var boxY = 50;

document.addEventListener('mousemove', function(e) {
    var x = e.pageX,
        y = e.pageY;

    var dx = x - boxX,
        dy = y - boxY;

    var distance = Math.sqrt(dx *dx + dy * dy);

    box.style.width = box.style.height = distance + 'px';

}, false);

这是一个小提琴的链接:http: //jsfiddle.net/gSDPq/

任何帮助表示赞赏,谢谢

基本上,我想要做的是通过应用程序中的按钮单击更改CONTROL_AE_MODE.用户可以使用AUTO闪光(ON_AUTO_FLASH),如果ON(ON_ALWAYS_FLASH)或OFF(CONTROL_AE_MODE_OFF)则使用.

在此示例中:https://github.com/googlesamples/android-Camera2Basic/blob/master/Application/src/main/java/com/example/android/camera2basic/Camera2BasicFragment.java

第818行,他们设置闪光灯一次:

// Use the same AE and AF modes as the preview.
            captureBuilder.set(CaptureRequest.CONTROL_AF_MODE,
                    CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
            setAutoFlash(captureBuilder);

            // Orientation
            int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
            captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));

            CameraCaptureSession.CaptureCallback CaptureCallback
                    = new CameraCaptureSession.CaptureCallback() {

                @Override
                public void onCaptureCompleted(@NonNull CameraCaptureSession session,
                                               @NonNull CaptureRequest request,
                                               @NonNull TotalCaptureResult result) {
                    showToast("Saved: " + mFile);
                    Log.d(TAG, mFile.toString());
                    unlockFocus();
                }
            };

            mCaptureSession.stopRepeating();
            mCaptureSession.capture(captureBuilder.build(), CaptureCallback, null);

然后在840行构建CaptureSession.

有没有办法在预览后更改CONTROL_AE_MODE？

我试过改造会议,这有点奏效:

if(flashMode == CameraView.CAMERA_FLASH_ON){
            Log.e("CAMERA 2", "FLASH ON");
            mPreviewCaptureRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON_ALWAYS_FLASH);
        }else if(flashMode == CameraView.CAMERA_FLASH_OFF){
            Log.e("CAMERA 2", "FLASH OFF"); …

嗨,我正在尝试使用threejs进行简单的着色.我正在使用O'reilly的Up and Running书.

一切都很好,直到我试图这样做:

                var shader = THREE.ShaderLib["normal"];
            var uniforms = THREE.UniformsUtils.clone(shader.uniforms);

            uniforms["tNormal"].texture = normalMap;
            uniforms["tDiffuse"].texture = surfaceMap;
            uniforms["tSpecular"].texture = specularMap;

这一直在抛出这个错误:

TypeError:uniforms.normal未定义[在此错误时出现错误]

制服["normal"].texture = normalMap;

我一直在网上寻找一段时间,我不确定需要改变哪种语法来解决这个问题.

任何帮助表示赞赏.