I want to maker a marker. I use mac.
I try to make this by processing. And I use an unfoldingmap library.
But a marker doesn't show.
Additionally, I draw a text for knowing my position. But It doesn't show.
Thank you for your answer!
import de.fhpotsdam.unfolding.*;
import de.fhpotsdam.unfolding.geo.*;
import de.fhpotsdam.unfolding.utils.*;
import de.fhpotsdam.unfolding.providers.*;
import de.fhpotsdam.unfolding.marker.*;
UnfoldingMap map;
void setup() {
size(800,600);
map=new UnfoldingMap(this,new Google.GoogleMapProvider());
MapUtils.createDefaultEventDispatcher(this,map);
Location seoulLocation=new Location(37.549,126.989);
map.zoomAndPanTo(seoulLocation,10);
float maxPanningDistance=30; //in km
map.setPanningRestriction(seoulLocation,maxPanningDistance);
SimplePointMarker seoulMarker=new SimplePointMarker(seoulLocation);
//SimplePointMarker dublinMarker=new SimplePointMarker(dublinLocation);
map.addMarkers(seoulMarker);
map.setTweening(true);
}
void draw() {
map.draw();
// position showing
Location location=map.getLocation(mouseX,mouseY);
fill(100);
text(location.getLat()+","+location.getLon(),mouseX,mouseY);
}
I try to show my mouse position in draw fucntion.but It doesn't show.
But if I delete "map.draw()", then I can show. But I don't know why.
When I run your code, both things show up.
The marker is here:
You can zoom in to see it better:
Similarly, I also see the text. In this screenshot, my mouse is just to the right of the marker:
If this is not what you're seeing, then check the console are of the Processing editor for any errors.
Related
I get the error to draw, move, resize some rectangles over the image upload in React-shape-editor library. It's said "arr.slice is not a function or its return value is not iterable"
My code is here https://codesandbox.io/s/rectangles-ihsgo
My code will let the user upload image, after upload, there is 2 rectangles display but I can not resize, move or draw other rectangles as well. I think the error is in this function:
function arrayReplace(arr, index, item) {
return [
...arr.slice(0, index),
...(Array.isArray(item) ? item : [item]),
...arr.slice(index + 1),
];
}
I have looked at a lot of fixing errors but don't know how to fix them. Can someone help me?
You're passing the whole state object to arrayReplace, you need to pass just currentItems.items
What would be the best way, in linux from gnu C and not C++, to display a gif87a file on screen and redisplay it in the same location on the screen so the user can observe changes that are made on the fly to the dataset? This is not an animated gif.
in some old code (fortran77) that has a C wrapper which takes an image that was displayed on the screen and writes it to a gif file, there is a comment about X Window Applications Programming, Ed. 2, Johnson & Reichard that was used as a reference to write the C code to display image data to the screen and write a gif87a file, and this code was written around 1995, the onscreen display of the image no longer works (just a black window) but the creation of the gif file still works. What i would like to do is from the existing C code, in SLES version 11.4 with the libraries that are available to open the gif file and display it on screen. The image, or contour plot, has a color bar that the user sets the min/max value for to display the image to their liking and it would be preferable to make it as easy & efficient for the user to adjust those min max values then redraw the image (re-write the gif then redisplay on screen in same location). There's also a handful of other knobs that the user can turn, such as windowing of the dat (hamming or han) and it would be best if the user can quickly/easily run though about 5+ ways of looking at the image before settling on what is considered correct then using that final gif that was created in powerpoint, excel, etc.
Writing an X11 application is non-trivial. You can display a GIF (or any one of around 200 image formats) using ImageMagick which is included in most Linux distros and is available for macOS. Windows doesn't count.
So, you can create images and manipulate images from the command line, or in C if you want. So, let's create a GIF that is 1024x768 and full of random colours:
convert -size 1024x768 xc:blue +noise random -pointsize 72 -gravity center -annotate 0 "10" image.gif
Now we can display it, using ImageMagick's display program:
display image.gif &
Now we can get its X11 "window-id" with:
xprop -root
...
_NET_ACTIVE_WINDOW(WINDOW): window id # 0x600011
...
...
Now you can change the image, however you like with filters and blurs and morphology and thresholds and convolutions:
convert image.gif -threshold 80% -morphology erode diamond -blur 0x3 -convolve "3x3: -1,0,1, -2,0,2, -1,0,1" ... image.gif
And then tell the display program to redraw the window with:
display -window 0x600011 image.gif
Here is a little script that generates images with a new number in the middle of each frame and updates the screen:
for ((t=0;t<100;t++)) ; do
convert -size 640x480 xc:blue +noise random -pointsize 72 -fill white -gravity center -annotate 0 "$t" image.gif
display -window 0x600011 image.gif
done
Now all you need to do is find a little Python or Tcl/Tk library that draws some knobs and dials, reads their positions and changes the image accordingly and tells the screen to redraw.
As a result of the lack of enthusiasm for my other answer, I thought I'd have another attempt. I had a quick look and learn of Processing which is a very simple language, very similar to C but much easier to program.
Here is a screen shot of it loading a GIF and displaying a couple of twiddly knobs - one of which I attached to do a threshold on the image.
Here's the code - it is not the prettiest in the world because it is my first ever code in Processing but you should be able to see what it is doing and adapt to your needs:
import controlP5.*;
ControlP5 cp5;
int myColorBackground = color(0,0,0);
int knobValue = 100;
float threshold=128;
Knob myKnobA;
Knob myKnobB;
PImage src,dst; // Declare a variable of type PImage
void setup() {
size(800,900);
// Make a new instance of a PImage by loading an image file
src = loadImage("image.gif");
// The destination image is created as a blank image the same size as the source.
dst = createImage(src.width, src.height, RGB);
smooth();
noStroke();
cp5 = new ControlP5(this);
myKnobA = cp5.addKnob("some knob")
.setRange(0,255)
.setValue(50)
.setPosition(130,650)
.setRadius(100)
.setDragDirection(Knob.VERTICAL)
;
myKnobB = cp5.addKnob("threshold")
.setRange(0,255)
.setValue(220)
.setPosition(460,650)
.setRadius(100)
.setNumberOfTickMarks(10)
.setTickMarkLength(4)
.snapToTickMarks(true)
.setColorForeground(color(255))
.setColorBackground(color(0, 160, 100))
.setColorActive(color(255,255,0))
.setDragDirection(Knob.HORIZONTAL)
;
}
void draw() {
background(0);
src.loadPixels();
dst.loadPixels();
for (int x = 0; x < src.width; x++) {
for (int y = 0; y < src.height; y++ ) {
int loc = x + y*src.width;
// Test the brightness against the threshold
if (brightness(src.pixels[loc]) > threshold) {
dst.pixels[loc] = color(255); // White
} else {
dst.pixels[loc] = color(0); // Black
}
}
}
// We changed the pixels in destination
dst.updatePixels();
// Display the destination
image(dst,100,80);
}
void knob(int theValue) {
threshold = color(theValue);
println("a knob event. setting background to "+theValue);
}
void keyPressed() {
switch(key) {
case('1'):myKnobA.setValue(180);break;
case('2'):myKnobB.setConstrained(false).hideTickMarks().snapToTickMarks(false);break;
case('3'):myKnobA.shuffle();myKnobB.shuffle();break;
}
}
Here are some links I used - image processing, P5 library of widgets and knobs.
The code bellow will paint he component on the image graphics - but it will translate it - instead of fitting it to the size of the graphics.
int ratio = 2;
Image screenshotImage = Image.createImage(getWidth()* ratio,getHeight()* ratio);
c.revalidate();
c.setVisible(true);
c.paintComponent(screenshotImage.getGraphics(), true);
I cannot use the the image and just scale it because some of the content will be truncated.
Can the component paint itself on image graphics with specified size.
Many thanks
Use:
c.setX(0);
c.setY(0);
c.setWidth(img.getWidth());
c.setHeight(img.getHeight());
if(c instanceof Container) {
c.setShouldLayout(true);
c.layoutContainer();
}
c.remove();
c.paintComponent(myImage.getGraphics(), true);
// add c back to it's parent container and revalidate
If the component is currently on a form you would want to undo all of that by calling revalidate on the parent form afterwards.
I am displaying videos on a form but the video is always stretched to a square. I can't get hold of any video component to get it's true size. This is the code to display video:
imageVideoContainer = new Container(new BorderLayout(BorderLayout.CENTER_BEHAVIOR_SCALE)) {
protected Dimension calcPreferredSize() {
return new Dimension(Display.getInstance().getDisplayWidth(), Display.getInstance().getDisplayWidth());
}
};
media = MediaManager.createMedia(FileSystemStorage.getInstance().getAppHomePath() + movePath, true);
mp = new MediaPlayer(media);
mp.setAutoplay(true);
imageVideoContainer.add(BorderLayout.CENTER, mp);
container = new Container(new BoxLayout(BoxLayout.Y_AXIS));
container.add(BorderLayout.centerAbsolute(imageVideoContainer));
If I don't overwrite the calcPreferredSize it doesn't display at all. Any help appreciated. I've tried debugging to look into Media Player to get something that has a size but can't find anything.
The problem is that until the video is loaded the size isn't there. So when you add it to the form it's preferred size will be 0.
You then add it to center absolute which requires preferred size to position/size the video. A solution can be to start the video then call revalidate() to redo the layout and position the video correctly.
I have this set up in my main.lua file
images = {
display.newImageRect("images/player3.png", 45,35),
display.newImageRect("images/player4.png", 45,35),
display.newImageRect("images/player5.png", 45,35)
}
and call it from my game.lua file with this code:
bird = images[math.random(1,3)]
bird.x, bird.y = -80, 140
bird.name = "bird"
physics.addBody( bird, "static")
bird.isFixedRotation = true
birdIntro = transition.to(bird,{time=1000, x=100, onComplete= birdReady})
A random image spawns (where it should, in the middle) but the issue is that a second image spawns and sits in the top left corner of the screen (slightly off screen). I can't seem to remove it and keep the one correct image only, any solutions?
Your help is greatly appreciated.
Thanks
I think the problem is your images array. I've found by calling the display.newImageRect it will create the object and plop it on the screen. Even if you don't want it to show the object right then. Usually I see this when I should be putting it in a display group (not sure if you are doing that).
I think the solution might be to have the array of images be the image paths and then you can set bird equal to a new image rect at that point, thus only creating 1 image rectangle instead of 3.
images = {
"images/player3.png",
"images/player4.png",
"images/player5.png",
}
bird = display.newImageRect(images[math.random(1,3)],45,35)
Let me know if that works.