i have a problem with setDuration. for example i used this code:
image.animate().alpha(1).set duration(200);
if in setting > developer option > animatordurationscale is on x1, this cod will be work.
but if the scale is x5 this cod will be work so slowly !
how i can turn off animate scale ?
Related
Now, I am developing our own Android Auto Project. I encountered an issue.
I added 3 supported VideoConfiguration. (1920 X 1080, 1280 X 720, 800 X 480)
Our in-car screen's size is 1920 X 720.
After I started my app in car, I noticed the cellphone informed us which the video output from the cellphone(or MD) was 1920 X 1080. I also set the view area as 1920 X 720, or in another way, the content area was 1920 X 720.
Finally, the projectional video was shown, but unfortunately, the video was stretched forcefully. All of those icons, texts were out of shape, as if my configuration was useless.
My question is, how can I adjust my parameters so that the projectional contents from MD can be shown properly.
I asked google's service desk, they told me to set the margin on top and bottom 180 respectively.
But I tried, as below,
VideoFrameRateType frameRate = (fps == 30) ? VideoFrameRateType.VIDEO_FPS_30 : VideoFrameRateType.VIDEO_FPS_60;
Protos.Insets.Builder insetsBuilder = Protos.Insets.newBuilder().setTop(180).setBottom(180);
UiConfig.Builder uiBuilder = UiConfig.newBuilder().setMargins(insetsBuilder);
VideoConfiguration.Builder builder = VideoConfiguration.newBuilder()
// .setUiConfig(uiBuilder)
.setCodecResolution(codecResolution)
.setFrameRate(frameRate)
.setWidthMargin(0)
.setHeightMargin(360)
.setDensity(213)
.setRealDensity(170)
.setVideoCodecType(MediaCodecType.MEDIA_CODEC_VIDEO_H264_BP)
.setDecoderAdditionalDepth(decoderAdditionalDepth)
.setViewingDistance(viewingDistance)
.setPixelAspectRatioE4(Math.round(pixelAspectRatio * 1e4f));
I tried to set heightMargin, or add UiConfig's setTop(180).setBottom(180), nothing could sort the problem out.
Or, is there anything I can do we I create MediaFormat format = MediaFormat.createVideoFormat programmatically?
I think I have already wrapped things up by myself.
First, we need to adjust our layout attributes, from match_parent to 1920px & 1080px.
Second, before we create a VedioConfiguration, we should new UiConfig and set its top & bottom to match your content area.
I am trying to display 2 overlaid images in an app within a UIAxes.
I know about imshowpair(bg,fg,'blend'), and although it does work, it doesn't allow me to control the transparency level.
I tried following Steve's tip, where he recommends using:
f1 = imshow(fig1);
f2 = imshow(fig2);
set(f2,'AlphaData',alpha)
but it doesn't work properly within a UIAxes. When I set the 'AlphaData' property, both images become transparent.
How can I do this? The idea would be to have a slider where the user can set the transparency of the top image interactively.
Reference code and images
f1 = imshow(ref,'Parent',app.UIAxes);
hold on
f2 = imshow(gbT2,'Parent',app.UIAxes);
hold off
set(f2,'AlphaData', alpha);
How it looks in a figure vs how it looks in UIAxes:
Running in R2018a, I'm not able to reproduce this. This is the code I used though:
I = imread('cameraman.tif');
f1 = imshow(I,'Parent',app.UIAxes);
hold(app.UIAxes, 'on')
I2 = imread('pout.tif');
f2 = imshow(I2,'Parent',app.UIAxes);
hold(app.UIAxes, 'off')
set(f2,'AlphaData', 0.5);
I'm developing a mobile game in Unity3d which the player needs to move a stick that is placed just a little bit higher then the finger with transform.position and block a ball that is moved with Force.Mode2D.impulse. The problem is that the ball goes through the stick if the stick is moved too fast. Could anyone please teach me how to code the stick movement with Force (or any other way that works) that still moves according to the finger position on touch screen ( A.K.A Input.mousePosition) instead of using buttons?
The code goes as such if anyone needs the info;
Stick:
float defencePosX = Mathf.Clamp( Input.mousePosition.x / Screen.width * 5.6f - 2.8f , -2.8f, 2.8f);
float defencePosY = Mathf.Clamp( Input.mousePosition.y / Screen.height * 10 - 4f, -3.3f, -0.5f);
this.transform.position = new Vector3 (defencePosX, defencePosY, 0);
Ball:
projectileSpeed = Random.Range (maxSpeed, minSpeed);
projectileSwing = Random.Range (-0.001f, 0.001f);
rb.AddForce (new Vector2 (projectileSwing * 1000, 0), ForceMode2D.Impulse);
rb.AddForce (new Vector2 (0, projectileSpeed), ForceMode2D.Impulse);
a video of the bug:
https://youtu.be/cr2LVBlP2O0
basicly if i dont move the stick it hits but if i move it fast the ball goes right through. (the bouncing sound effect doesnt work if itss too fast as well)
When working with physics objects, you'll want to use just the Rigidbody component when moving them. Otherwise, it's interpreted as a teleport and no physics is applied and no movement is calculated.
Try using Rigidbody.MovePosition instead of transform.position.
Also, make sure the Rigidbody components on your stick AND ball both have collisionDetectionMode set to 'Continuous Dynamic'. That's how you get small fast-moving physics objects to hit one another in between frames.
float defencePosX = Mathf.Clamp( Input.mousePosition.x / Screen.width * 5.6f - 2.8f , -2.8f, 2.8f);
float defencePosY = Mathf.Clamp( Input.mousePosition.y / Screen.height * 10 - 4f, -3.3f, -0.5f);
rb.MovePosition(new Vector3 (defencePosX, defencePosY, 0));
Id recommend that you set the balls force to Vector3.zero before adding force to it, or that you use the collider of your blocking movement as a bounce pad for the ball.
Please remember to check that your colliders are scaled correctly according to the blocker.
A video displaying your issue would be helpful to understand it better.
From this post i came to know that there exist some platform improvements for
implementing pinch and zoom functionality. By using this new method(ManipulationDeltaEventArgs.PinchManipulation) how i can implement pinch to zoom functionality in windows phone.
Apart from this i need to implement scrolling feature too to the image control. In my current implementation, i am using Toolkit(gesture listener) for pinch and zoom functionality along with scroll viewer, now it seem both scrolling and and pinching events are overlapping and hence it produces a bad user experience.
Can anyone help me to solve this issue in my application. I am looking some code samples that help me to achieve the functionality.
I am not expected to get Multi touch behavior(codeplex) as answer. The assemblies using in the project are quite old and i heard that many of them are facing issues with marketplace submission only because of this.
As I said in my previous answer if you're building a WP8 exclusive app you can use the new ManipulationDeltaEventArgs.PinchManipulation for pinch & zoom effects. Here's a basic example of how to use ManipulationDeltaEventArgs.PinchManipulation data to scale, move and rotate an image.
First, we'll create a basic image hovering in the middle of a grid:
<Grid x:Name="ContentPanel">
<Image Source="Assets\Headset.png"
Width="200" Height="150"
ManipulationDelta="Image_ManipulationDelta"
x:Name="img"
>
<Image.RenderTransform>
<CompositeTransform CenterX="100" CenterY="75" />
</Image.RenderTransform>
</Image>
</Grid>
Next, we'll handle the ManipulationDelta event, check if it's a Pinch Manipulation and apply the correct Silverlight transformations on our UIElement.
private void Image_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
if (e.PinchManipulation != null)
{
var transform = (CompositeTransform)img.RenderTransform;
// Scale Manipulation
transform.ScaleX = e.PinchManipulation.CumulativeScale;
transform.ScaleY = e.PinchManipulation.CumulativeScale;
// Translate manipulation
var originalCenter = e.PinchManipulation.Original.Center;
var newCenter = e.PinchManipulation.Current.Center;
transform.TranslateX = newCenter.X - originalCenter.X;
transform.TranslateY = newCenter.Y - originalCenter.Y;
// Rotation manipulation
transform.Rotation = angleBetween2Lines(
e.PinchManipulation.Current,
e.PinchManipulation.Original);
// end
e.Handled = true;
}
}
// copied from http://www.developer.nokia.com/Community/Wiki/Real-time_rotation_of_the_Windows_Phone_8_Map_Control
public static double angleBetween2Lines(PinchContactPoints line1, PinchContactPoints line2)
{
if (line1 != null && line2 != null)
{
double angle1 = Math.Atan2(line1.PrimaryContact.Y - line1.SecondaryContact.Y,
line1.PrimaryContact.X - line1.SecondaryContact.X);
double angle2 = Math.Atan2(line2.PrimaryContact.Y - line2.SecondaryContact.Y,
line2.PrimaryContact.X - line2.SecondaryContact.X);
return (angle1 - angle2) * 180 / Math.PI;
}
else { return 0.0; }
}
Here's what we did:
Scaling: PinchManipulation actually tracks scaling for us, so all we had to do is apply PinchManipulation.CumulativeScale to the scaling factor.
Transform: PinchManipulation tracks the original center and the new center (calculated between the two touch points). By subtracting the new center from the old center we can tell how much the UIElement needs to move and apply that to a translate transform. Note that a better solution here would also account for multiple Manipulation sessions by tracking cumulative original centers which this code doesn't.
Rotation: We figured out the angle between the two touch points and applied it as the rotation transform. More on that in this Nokia wiki article # Real-time rotation of the Windows Phone 8 Map Control
Here's a few print screens showing this code runs just fine:
I found the perfect soultion for smooth pinch to zoom and pan. It is actually a Microsoft Code sample at the following link
http://code.msdn.microsoft.com/wpapps/Image-Recipes-0c0b8fee
I just used it as boiler plate code and it worked wonders.
Cheers
If you're looking to roll your own, you might want to check out this article about pinch zooming in Silverlight: Implementing pinch zoom correctly in Silverlight
Telerik also has an out of the box pan and zoom image control, but it does cost money: Telerik Pan and Zoom Control
I've written a home-brew view_port class for a 2D strategy game. The panning (with arrow keys) and zooming (with mouse wheel) work fine, but I'd like the view to also home towards wherever the cursor is placed, as in Google Maps or Supreme Commander
I'll spare you the specifics of how the zoom is implemented and even what language I'm using: this is all irrelevant. What's important is the zoom function, which modifies the rectangle structure (x,y,w,h) that represents the view. So far the code looks like this:
void zoom(float delta, float mouse_x, float mouse_y)
{
zoom += delta;
view.w = window.w/zoom;
view.h = window.h/zoom;
// view.x = ???
// view.y = ???
}
Before somebody suggests it, the following will not work:
view.x = mouse_x - view.w/2;
view.y = mouse_y - view.h/2;
This picture illustrates why, as I attempt to zoom towards the smiley face:
As you can see when the object underneath the mouse is placed in the centre of the screen it stops being under the mouse, so we stop zooming towards it!
If you've got a head for maths (you'll need one) any help on this would be most appreciated!
I managed to figure out the solution, thanks to a lot of head-scratching a lot of little picture: I'll post the algorithm here in case anybody else needs it.
Vect2f mouse_true(mouse_position.x/zoom + view.x, mouse_position.y/zoom + view.y);
Vect2f mouse_relative(window_size.x/mouse_pos.x, window_size.y/mouse_pos.y);
view.x = mouse_true.x - view.w/mouse_relative.x;
view.y = mouse_true.y - view.h/mouse_relative.y;
This ensures that objects placed under the mouse stay under the mouse. You can check out the code over on github, and I also made a showcase demo for youtube.
In my concept there is a camera and a screen.
The camera is the moving part. The screen is the scalable part.
I made an example script including a live demo.
The problem is reduced to only one dimension in order to keep it simple.
https://www.khanacademy.org/cs/cam-positioning/4772921545326592
var a = (mouse.x + camera.x) / zoom;
// now increase the zoom e.g.: like that:
zoom = zoom + 1;
var newPosition = a * zoom - mouse.x;
camera.setX(newPosition);
screen.setWidth(originalWidth * zoom);
For a 2D example you can simply add the same code for the height and y positions.