I'm drawing texts and computing their bounding boxes. I always want the texts to show their face to the camera and so I'm using following lines:
textArr.forEach(function(text) {
var textGeo = d.geometry;
text.lookAt(camera.position)
})
It's working fine but it rotates from top left corner and I can't change the axis of rotation:
How can I make it rotate from center of the text while using .lookAt()?
Try center the pivot using
THREE.GeometryUtils.center(textGeo)
Related
I have a user interface with:
N.1 Push button (used to upload images)
N.2 QGraphicsView (left and right)
N.1 Push button that takes a print screen of the current image loaded on QGraphicsView left
Using the mouse is possible to:
1) zoom-in/zoom-out from the image
2) draw rectangles on the image.
I want to take the print screen of the image according to the zoom-in or zoom-out area I am using. However, once the file is saved it shows the entire image (wrong because I wanted only the enlarged or shrank part) with the rectangles drawn (this is correct).
According to this post QFileDialog was used in a similar way I am trying to do. I successfully used QFileDialog::getSaveFileName() to save the image. However it is not entirely solving the problem.
Below the pushbutton that takes care of taking the print screen of the image in the QGraphicsView left:
void MainWindow::on_addNewRecordBtn_clicked()
{
leftScene->clearSelection(); // Selections would also render to the file
leftScene->setSceneRect(leftScene->itemsBoundingRect()); // Re-shrink the scene to it's bounding contents
QImage image(leftScene->sceneRect().size().toSize(), QImage::Format_ARGB32); // Create the image with the exact size of the shrunk scene
image.fill(Qt::transparent); // Start all pixels transparent
QPainter painter(&image);
leftScene->render(&painter);
image.save(QFileDialog::getSaveFileName(this, tr("New Image Name"), QDir::rootPath(),
"Name (*.jpg *.jpeg *.png *.tiff *.tif)"));
}
The expected result would be saving the zoomed image (zoom.jpg for example) like this:
However when I save the image (zoom.jpg) the result that I am obtaining is constantly the entire image with the drawn features:
So if anyone needs, it is possible to take a print screen of an image no matter what the zoom in. Meaning you can zoom-in and zoom-out and take a print screen.
The following statement will do the job, grabbing the image your present (zoomed in or out status):
QImage image = ui->leftView->grab().toImage();
The only glitch is that the scroll bars horizontal and vertical (depending on the zoom) are also printed in your image. You can avoid that by setting them off right before taking the print screen and putting them back on right after.
Basically my previous function can be better written as follows:
void MainWindow::on_addNewRecordBtn_clicked()
{
leftScene->setSceneRect(leftScene->itemsBoundingRect());
// Setting off the scroll bars
ui->leftView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
ui->leftView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
QImage image = ui->leftView->grab().toImage();
image.save(QFileDialog::getSaveFileName(this, tr("New Image Name"), QDir::rootPath(),
"Name (*.jpg *.jpeg *.png *.tiff *.tif)"));
// Putting the scroll bars back on
ui->leftView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
ui->leftView->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
}
Hope this will be helpful in case you encountered my same problem.
I am using ArcGIS API v4.8 and the drawing tools to draw circle on my map.
1 issue I notice is when I draw a circle, the center of the circle moves when I move my mouse resizing the circle rather than fixed at the point of the 1st mouse click starts:
How do I fix the center regardless of how I move the radius of the circle? What is missing in my code?
const options = {view, layer: tempGraphicsLayer, pointSymbol, polylineSymbol, polygonSymbol}
let sketchViewModel = new SketchViewModel(options)
let drawCircleButton = document.getElementById('circleButton')
drawCircleButton.onclick = function () {
clear()
isDrawLine = false
sketchViewModel.create('polygon', {mode: 'click'})
sketchViewModel.create('circle')
}
EDIT:
I have found a similar sample, choose the Draw Circle tool, start drawing a circle on the map, you will notice that the center of the circle moves when you move your mouse, I want it to fix the center instead.
The problem when the center moves along with your mouse move is that the circle drawn is not accurate, as I want to start with the center of the circle I want, the circle can expand outward but the center should not move.
That is because the circle, in the given example, is being draw inside the square object. Basically your start and end point are representing corners, not the center point and outer layer of the circle. So every time you expand circle object, it expands from one corner, while the rest is dragging along your mouse.
Visual example:
There are workarounds for this of course. I've made a small sample code of one of the possible ways to draw a circle from a fixed center point.
https://jsfiddle.net/wLd46g8k/9/
Basically I used an ArcGis JS API 4.x constructor called Circle, where you pass a starting point and radius. In my example I've calculated the radius from these two points.
function drawCircle(){//draws the circle
graphicsLayer.graphics.removeAll();
var graphic = new Graphic({
geometry: new Circle({//circle constructor
center: startPoint,//pass the pointer-down event X Y as a starting point
radius: Math.floor(Math.sqrt(Math.pow(startPoint.x - endPoint.x, 2) + Math.pow(startPoint.y - endPoint.y, 2)))
}), //calculates endpoint distance from the startpoint and pass it as a radius
symbol: {//circle design
type: "simple-fill",
color: "orange",
style: "solid",
outline:{
color:"darkorange",
width:4
}
}
});
graphicsLayer.graphics.add(graphic);//adds the circle
};
When I am using QScatterSeries, I can very easily draw point at (x, y). However, instead of points I would like to draw short lines, like in the figure below. How can I get about doing so?
I tried using RectangleMarker, but it just draws a fat square. I would prefer a thin line about 2px wide and 20px in height.
Is there a way I can add custom marker shapes?
Here are the code and the settings I use to transform my points into lines :
//create scatter series to draw point
m_pSeries1 = new QtCharts::QScatterSeries();
m_pSeries1->setName("trig");
m_pSeries1->setMarkerSize(100.0);
//draw a thin rectangle (50 to 50)
QPainterPath linePath;
linePath.moveTo(50, 0);
linePath.lineTo(50, 100);
linePath.closeSubpath();
//adapt the size of the image with the size of your rectangle
QImage line1(100, 100, QImage::Format_ARGB32);
line1.fill(Qt::transparent);
QPainter painter1(&line1);
painter1.setRenderHint(QPainter::Antialiasing);
painter1.setPen(QColor(0, 0, 0));
painter1.setBrush(painter1.pen().color());
painter1.drawPath(linePath);
//attach your image of rectangle to your series
m_pSeries1->setBrush(line1);
m_pSeries1->setPen(QColor(Qt::transparent));
//then use the classic QtChart pipeline...
You can play the marker size, the dimension of the image and the drawing pattern in the painter to adapt the size and shape of the rectangle to obtain a line.
In the picture, it's the black line. As you can see you can repeat the process for other series.
Keep in mind that you cannot use the openGL acceleration:
m_pSeries0->setUseOpenGL(true);
My work is based on the QtCharts/QScatterSeries example : QScatterSeries example
Hope it will help you.
Florian
I am trying to slide a Panel from the bottom, so that it covers the entire viewport, like the Bookmarks panel in iOS Safari. This is similar to the ActionSheet, but fulscreen, and without the dark frame around it.
this.advSearch = Ext.ComponentMgr.create({xtype: 'advanced_search', itemId: 'pnlAdvancedSearch'});
this.advSearch.autoRender = true;
this.advSearch.show({type: 'slide', direction: 'up'});
This sort of works, but the new panel doesn't fill the whole screen, and parts of it appear behind the background panel. I've tried various layouts, including fit, vbox, with varying degrees of ugliness, but the root problem seems to be that the panel doesn't know how tall it needs to be. Maybe because it doesn't have a container?
Any suggestions? Is this even the right approach, or should I try to hack the ActionSheet to expand to fullscreen, and show without the border?
Thanks.
Because your panel is floating (or I presume it is), you will need to give the panel a fixed height in Sencha Touch 1. You are very restricted in that respect. This following code should work:
var sheet = new Ext.Sheet({
html: 'hello',
style: 'color:#fff',
height: window.innerHeight,
stretchX: true
});
// replace this show with your animation
sheet.show();
As you can see, I give it a fixed height of the window and then stretch it on the X axis (y doesn't work).
I am working on a mobile application and using sencha touch charts. By default horizontal bar chart is fitting exactly into screen. If there are more number of bars,then bars are appearing very thin and looking odd. I want to fix bar width to have uniform look and feel irrespective of number of bars being displayed. No matter even user need to scroll down to see entire chart. I have tried below option in series configuration, but it did not work.
style : {
size : 30
}
Please help me.
Thanks,
Nag.
am able to change the bar width by setting barWidth option in touchcharts-debug.js by refering to the following link
http://docs.sencha.com/touch-charts/1-0/source/Bar.html
but the axis labels are not rendering properly labels are fitting into screen
I tried this code in my interactions to render the labels, it's working fine
{
type: 'panzoom',
showOverflowArrows: false,
//axes: ['bottom'],
axes: {
bottom: false,
left: {
startZoom: 2
}
}
}