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• Replication with AK8

  - by Steve Tunstall

  Hello folks, This came up today and I want to make sure it's clear. Remember the "deferred update" I spoke about in my "Upgrade to AK8" entry just a bit ago? It's important to understand that this deferred update changes the way replication works. It is necessary that systems with the deferred update applied only replicate with other systems that have also had this deferred update applied. So if you apply it, your system can NOT replicate with ANY other system that has NOT had it applied, even if that other system is running AK8!!! Got it??? Remember, we do have a new version of the 2011 code for the older systems that do not want to upgrade to AK8. This 2011.1.8 code ALSO HAS this same deferred update in it. So, if you upgrade your system to AK8, and then apply the deferred update, and you have another system running either 2011.1.8 or AK8, you can replicate with them again once they apply the deferred update for multiple initiator groups. Yes, even if you're not using LUNs. Here is what it looks like if you try. It will fail.

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• ????????! ??????????????????WebLogic Server 12c?|WebLogic Channel|??????

  - by ???02

  ???????2011?12?9??WebLogic Server????Oracle WebLogic Server 12c??????????????????12?1????????????????????·?????10????????Oracle OpenWorld 2011?????????????????????????????1?????????????????????????????????????????Oracle Corporation??????? ???·????????????·????????????????????????????(???)?WebLogic Server 12c??????????????????　?????????????WebLogic Sever?BEA?????????????????????????????????????????????????BEA???????WebLogic Server????????????????????????????·??????????????????????????????????????????WebLogic Server?????????????????????　???????????????????????????·????????·????????????????????IBM????????????·?????????????????????????????????????????????????????????????????????????????????WebLogic Server????????????????????????????????　???????????????????????·?????????????·????????????????????WebLogic Server????????????12c?????????????c???????(Cloud)?????????????????????WebLogic Server 12c????????????????????????????　????????PC????????????????????????????????Exalogic???Engineered Systems??????????·?????????????????????????????????????(?????)　????????????/????????????????????????????????????????????????·??????????????????????????????????WebLogic Server??????????????????????????????????????????"???·??·????"????????????????????????????????　????????????Cloud Application Foundation????????????????????????????????????????????????????????·??·?????????????????????????????Cloud Application Foundation??????????????????WebLogic Server????WebLogic Server 12c?"6?"???????　??????WebLogic Server 12c?????200?????????????????????????????????6?????????????????????Java EE 6???????????????????????????·??????????????????????????????????????????????????????????????????　WebLogic Server 12c????Java EE 6???Java SE 7??????????????????????????·?????????????????????????????　????Java EE???????????????????????????????????????????Apache Maven???????????????????????????WebLogic Maven Plug-in???????????????????·????GlassFish?????????????WebLogic Server?????????????????·??????????????　?????????Oracle Database??????????????????Oracle Active DataGuard???Oracle GoldenGate?????????????/????????????????????????????????????????????????????/????????????????????????????"?????"?Oracle Database?WebLogic Server 12c??????????????????????????????????????????　???????????????????????????????????????????????????WebLogic Server 12c????????????????????????·?????·????Oracle Virtual Assembly Builder??????????WebLogic Server????????????????????????????????????????????????????????????Exalogic(Engineered Systems)???????·??????????????????????????????　?????????????????????????????????????????????????????????????????????????????????(?????)　WebLogic Server??????????????????????????????Oracle Enterprise Manager Cloud Control 12c????????????????????Exalogic??????????Oracle Traffic Director???????????????????????????????HTTP1.1???????SSL??????????????·????·????????????·???????????????????????????????????????????????　WebLogic Server 12c???????????·???????????????????????????????????????????·?????????????SPECjEnterprise 2010????????????????????????????????????????????WebLogic Server 12c??????????????????????????????　???WebLogic Sever??????????Engineered Systems???Exalogic????????????????????????????　?Exalogic??WebLogic Server??????????????????????5~10????????????(?????)　???????????????????????????????????????????????????????????　????Oracle Real Application Clusters(RAC)??????????·?????WebLogic??????????????????·????????????????Active GlidLink for RAC???????·??????????????????????·???·???????Oracle Coherence??????????????????????????????????　WebLogic Server 12c??Cloud Application Foundation??????Fusion Middleware 12c?????????2012?????Oracle Tuxedo???Oracle Coherence???SOA??????Oracle WebCenter?????????????????????????????Fusion Middleware?????????????????????　??????????????????Java???????????????????????????Java EE????HTML5???????????????PaaS?????????????????????????Java????????????????????????????????????????????????????????Java EE?????????????????Oracle OpenWorld Tokyo 2012??????ENGINEERED FOR INNOVATION ??????????????????????????????????????????????????????????????????????????????????WebLogic Server???????????????????????![???????????:4324]??:2012?4?4?(?)~6?(?)??:???? ????? ??????????????49????????????:????Oracle OpenWorld Tokyo 2012???? ~??????~(PDF)Oracle OpenWorld Tokyo 2012???????

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• Java Simple WGS84 Lat Lon to Pixel X, Y

  - by Cnich

  I've read a multitude of information regarding map projection today. The amount of information available is overwhelming. I am attempting to simply convert lat, long values into a screen X, Y coordinate not using any map. I do not need the values projected onto any map, just on the window. The window itself is representing approx. a 1500x1500 meter location. Lat, Long accuracy needed is to a 1/10th of a second. What may be some simpler ways in converting lat/long representation to the screen? I've read several articles and post regarding translation onto images, but nothing related to the natural java coordinate system. Thanks for any insight.

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• Why the CLLocationManager delegate is not getting called in iPhone SDK 4.0 ???

  - by Biranchi

  Hi, This is the code that I have in my AppDelegate Class - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { CLLocationManager *locationManager = [[CLLocationManager alloc] init]; locationManager.delegate = self; locationManager.distanceFilter = 1000; // 1 Km locationManager.desiredAccuracy = kCLLocationAccuracyKilometer; [locationManager startUpdatingLocation]; } And this is the delegate method i have in my AppDelegate Class //This is the delegate method for CoreLocation - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { //printf("AppDelegate latitude %+.6f, longitude %+.6f\n", newLocation.coordinate.latitude, newLocation.coordinate.longitude); } Its working in 3.0, 3.1, 3.1.3 , but its not working in 4.0 simulator and device both. What is the reason ?? I am getting frustrated ...... Thanks....

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• iphone zoom to user location on mapkit

  - by satyam

  I'm using map kit and showing user's location using "showsUserLocation" I"m using following code to zoom to user's location, but not zooming. Its zooming to some location in Africa, though the user location on map is showing correct. MKCoordinateRegion newRegion; MKUserLocation* usrLocation = mapView.userLocation; newRegion.center.latitude = usrLocation.location.coordinate.latitude; newRegion.center.longitude = usrLocation.location.coordinate.longitude; newRegion.span.latitudeDelta = 20.0; newRegion.span.longitudeDelta = 28.0; [self.mapView setRegion:newRegion animated:YES]; Why is user's location correctly showing and not zooming properly. Can some one correct me please?

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• Trying to convert openGL to MFC coordinates and having Problems with "gluProject"

  - by Erez

  Hi, i'm trying to find the naswer on the web and can't find a full solution that i can use and that will work... I'm developing a MFC project with static picture as the canvas for an openGL class that draw the grphics for my game. On moush down, i need to retrive a shape coordinate from the openGL class. I'm looking for a way to convert the openGL coordinates to MFC coordinates but no matter what i try i get junk after using the gluProject or gluUnProject (i've tried to do both ways but non is working) GLdouble modelMatrix[16]; glGetDoublev(GL_MODELVIEW_MATRIX,modelMatrix); GLdouble projMatrix[16]; glGetDoublev(GL_PROJECTION_MATRIX,projMatrix); int viewport[4]; glGetIntegerv(GL_VIEWPORT,viewport); POINT mouse; // Stores The X And Y Coords For The Current Mouse Position GetCursorPos(&mouse); // Gets The Current Cursor Coordinates (Mouse Coordinates) ScreenToClient(hWnd, &mouse); GLdouble winX, winY, winZ; // Holds Our X, Y and Z Coordinates winX; = (float)point.x; // Holds The Mouse X Coordinate winY; = (float)point.y; // Holds The Mouse Y Coordinate winY = (float)viewport[3] - winY; glReadPixels(winX, winY, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &winZ); GLdouble posX=s1->getPosX(), posY=s1->getPosY(), posZ=s1->getPosZ(); // Hold The Final Values gluUnProject( winX, winY, winZ, modelMatrix, projMatrix, viewport, &posX, &posY, &posZ); gluProject(posX, posY, posZ, modelMatrix, projMatrix, viewport, &winX, &winY, &winZ); This is just part of the code i've tried. ofcourse not gluProject and gluUnProject together. just had them both here to show.....and i know there is lots of junk over there, its from some of my tries... p.s. i've tried many many more combinations and examples from the web and nothing seem to work in my case.... Can any one show me what is the right way to do the transformation? 10x

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• Does weak typing offer any advantages?

  - by sub

  Don't confuse this with static vs. dynamic typing! You all know JavaScripts/PHPs infamous type systems: PHP example: echo "123abc"+2; // 125 - the reason for this is explained // in the PHP docs but still: This hurts echo "4"+1; // 5 - Oh please echo "ABC"*5; // 0 - WTF // That's too much, seriously now. // This here might be actually a use for weak typing, but no - // it has to output garbage. JavaScript example: // A good old JavaScript, maybe you'll do better? alert("4"+1); // 51 - Oh come on. alert("abc"*3); // NaN - What the... // Have your creators ever heard of the word "consistence"? Python example: # Python's type system is actually a mix # It spits errors on senseless things like the first example below AND # allows intelligent actions like the second example. >>> print("abc"+1) Traceback (most recent call last): File "<pyshell#2>", line 1, in <module> print("abc"+1) TypeError: Can't convert 'int' object to str implicitly >>> print("abc"*5) abcabcabcabcabc Ruby example: puts 4+"1" // Type error - as supposed puts "abc"*4 // abcabcabcabc - makes sense After these examples it should be clear that PHP/JavaScript probably have the most inconsistent type systems out there. This is a fact and really not subjective. Now when having a closer look at the type systems of Ruby and Python it seems like they are having a much more intelligent and consistent type system. I think these examples weren't really necessary as we all know that PHP/JavaScript have a weak and Python/Ruby have a strong type system. I just wanted to mention why I'm asking this. Now I have two questions: When looking at those examples, what are the advantages of PHPs and JavaScripts type systems? I can only find downsides: They are inconsistent and I think we know that this is not good Types conversions are hardly controllable Bugs are more likely to happen and much harder to spot Do you prefer one of the both systems? Why? Personally I have worked with PHP, JavaScript and Python so far and must say that Pythons type system has really only advantages over PHPs and JavaScripts. Does anybody here not think so? Why then?

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• How to flip the origin.y of an CGRect?

  - by mystify

  I'm trying to draw an UIImageView, but the frame's origin is wrong when I flip the coordinate system for drawing not upside-down. CGRect imgRect = imgView.frame; imgRect.origin.y += 10.0f; CGContextTranslateCTM(context, 0.0f, imgRect.size.height); CGContextScaleCTM(context, 1.0f, -1.0f); CGContextDrawImage(context, imgRect, imgView.image.CGImage); like you can see I move the image down by 10, but instead of going down by 10, it goes UP by 10. That's completely unlogical since I had actually inverted the wrong coordinate system to look exactly like the one in UIView, right? What to do about it?

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• Java :moving ball with angle ?

  - by Meko

  Hi all.I am started to learn game physics and I am trying to move ball with an angle.But it does not change its angle .Java coordinate sydstem is a little different and i think my problem is there.Here my codes this is for calculating x and y speed scale_X= Math.sin(angle); scale_Y=Math.cos(angle); velosity_X=(speed*scale_X); velosity_Y=(speed*scale_Y); This is for moving ball in run() function ball.posX =ball.posX+(int)velosity_X; ball.posY=ball.posY+(int)velosity_Y; I used (int)velosity_X and (int)velosity_Y because in ball class I draw object g.drawOval(posX, posX, width, height); and here g.drawOval requares int.I dont know is it problem or not. Also if I use angle 30 it goes +X and +Y but if I use angle 35 it goes -X and -Y. I didnot figure out how work coordinate system on java.

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• MATLAB: Convert two array to a sparse matrix

  - by CziX

  I'm looking for an a command or trick to convert two arrays to a sparse matrix. The two arrays contain x-values and y-values, which gives a coordinate in the cartesian coordinate system. I want to group the coordinates, which if the value is between some value on the x-axes and the y-axes. % MATLAB x_i = find(x > 0.1 & x < 0.9); y_i = find(y > 0.4 & y < 0.8); %Then I want to find indicies which are located in both x_i and y_i Is there an easy way to this little trick?

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• MKMapView not centered on pin

  - by Val Smith

  Hi all, I have an mkmapview that i'm currently adding pins to, but for some reason when I call [mapView setRegion:[detailItem coordinateRegion] animated:YES]; the pin is off-centered (toward the right side of the screen) on the map. Here is the code for [deailItem coordinateRegion]: - (MKCoordinateRegion)coordinateRegion { MKCoordinateRegion region = { {0.0, 0.0 }, { 0.0, 0.0 } }; region.center = self.coordinate; region.span.longitudeDelta = 0.0075f; region.span.latitudeDelta = 0.0075f; return (region); } I'm setting the coordinateRegion's center to the object's x,y coordinate, so why is it off-center on the map? I feel like there's something I'm missing here... ::Val::

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• Erlang list comprehension, traversing two lists and excluding values

  - by ErJab

  I need to generate a set of coordinates in Erlang. Given one coordinate, say (x,y) I need to generate (x-1, y-1), (x-1, y), (x-1, y+1), (x, y-1), (x, y+1), (x+1, y-1), (x+1, y), (x+1, y+1). Basically all surrounding coordinates EXCEPT the middle coordinate (x,y). To generate all the nine coordinates, I do this currently: [{X,Y} || X<-lists:seq(X-1,X+1), Y<-lists:seq(Y-1,Y+1)] But this generates all the values, including (X,Y). How do I exclude (X,Y) from the list using filters in the list comprehension?

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• Zoom on userLocation

  - by Marco

  Hello, how can I zoom the map on my userLocation automatically in my app? I have the following code to zomm in the map but i must zoom on the userLocation and the following code zooms always to africa? MKCoordinateRegion zoomIn = mapView.region; zoomIn.span.latitudeDelta *= 0.2; zoomIn.span.longitudeDelta *= 0.2; zoomIn.center.latitude = mapView.userLocation.location.coordinate.latitude; zoomIn.center.longitude = mapView.userLocation.location.coordinate.longitude; [mapView setRegion:zoomIn animated:YES];

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• TomTom integration does not work anymore?

  - by viezel

  I did for 6 months back an integration for TomTom navigation with URL Scheme. This worked out great, but then TomTom updated their iPhone app to version 1.10. Since then the integration does not work. Anyone tried the same? My iOS integration looks like this: (Titanium appcelerator) var lat = dbDataArray[chosenRoute]["lat"].toFixed(6); //geo coordinate var lng = dbDataArray[chosenRoute]["lng"].toFixed(6); //geo coordinate //open navigation var url = "tomtomhome://geo:action=navigateto&lat="+lat+"&long="+lng+"&name=name"; //show map //var url = "tomtomhome://geo:action=show&lat="+lat+"&long="+lng+"&name=name"; if (Ti.Platform.canOpenURL(url)) { Ti.Platform.openURL(url); }else { alert('Please install TomTom Navigation app'); } Note: I cannot get TomTom to tell me what has changed.

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• How to fix rotations in a Rubik's Cube?

  - by Eindbaas

  I'm trying to create a Rubik's Cube in Flash & Papervision and i'm really stuck here. I'm up to the point where i can rotate any plane of cubes once, but after that...it's messed up because all local coordinate systems are messy. I dont really know where to go from here, can anybody give any advice on what do do? I'm not looking for 'read about transformation matrices', i know i should (and i am doing that), but i'm not really sure what to look for. My idea is that, after each rotation, i should fix each coordinate system of each cube again, but i have no idea how. Any hints on what i want to achieve (in words), and why, are much appreciated. http://dl.dropbox.com/u/250155/rubik/main.html (you can press the K key once ;) )

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• I've got my 2D/3D conversion working perfectly, how to do perspective

  - by user346992

  Although the context of this question is about making a 2d/3d game, the problem i have boils down to some math. Although its a 2.5D world, lets pretend its just 2d for this question. // xa: x-accent, the x coordinate of the projection // mapP: a coordinate on a map which need to be projected // _Dist_ values are constants for the projection, choosing them correctly will result in i.e. an isometric projection xa = mapP.x * xDistX + mapP.y * xDistY; ya = mapP.x * yDistX + mapP.y * yDistY; xDistX and yDistX determine the angle of the x-axis, and xDistY and yDistY determine the angle of the y-axis on the projection (and also the size of the grid, but lets assume this is 1-pixel for simplicity). x-axis-angle = atan(yDistX/xDistX) y-axis-angle = atan(yDistY/yDistY) a "normal" coordinate system like this --------------- x | | | | | y has values like this: xDistX = 1; yDistX = 0; xDistY = 0; YDistY = 1; So every step in x direction will result on the projection to 1 pixel to the right end 0 pixels down. Every step in the y direction of the projection will result in 0 steps to the right and 1 pixel down. When choosing the correct xDistX, yDistX, xDistY, yDistY, you can project any trimetric or dimetric system (which is why i chose this). So far so good, when this is drawn everything turns out okay. If "my system" and mindset are clear, lets move on to perspective. I wanted to add some perspective to this grid so i added some extra's like this: camera = new MapPoint(60, 60); dx = mapP.x - camera.x; // delta x dy = mapP.y - camera.y; // delta y dist = Math.sqrt(dx * dx + dy * dy); // dist is the distance to the camera, Pythagoras etc.. all objects must be in front of the camera fac = 1 - dist / 100; // this formula determines the amount of perspective xa = fac * (mapP.x * xDistX + mapP.y * xDistY) ; ya = fac * (mapP.x * yDistX + mapP.y * yDistY ); Now the real hard part... what if you got a (xa,ya) point on the projection and want to calculate the original point (x,y). For the first case (without perspective) i did find the inverse function, but how can this be done for the formula with the perspective. May math skills are not quite up to the challenge to solve this. ( I vaguely remember from a long time ago mathematica could create inverse function for some special cases... could it solve this problem? Could someone maybe try?)

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• Rotation towards an object in 3d space

  - by retoucher

  hello, i have two coordinates on a 2d plane in 3d space, and am trying to rotate one coordinate (a vector) to face the other coordinate. my vertical axis is the y-axis, so if both of the coordinates are located flat on the 2d plane, they would both have a y-axis of 0, and their x and z coordinates determine their position length/width-wise on the plane. right now, i'm calculating the angle like so (language agnostic): angle = atan2(z2-z1,x2-x1); and am rotating/translating in space like so: pushMatrix(); rotateY(angle); popMatrix(); this doesn't seem to be working though. are my calculations/process correct?

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• Find top "n" nearby coordinates.

  - by John Hamelink

  I have a coordinate. I want to find the top "n" (n being a variable value) nearest coordinates out of several thousand rows stored on a MySQL database. I also want to be able to define maximum and minimum distances between the coordinate in question and the coordinates in the database. How best am I to go about this? Would it be bonkers to use PHP as I understand the syntax much better than MySQL? If I use a MySQL function, how do I move it between databases if I choose to switch servers? How is it stored? Lastly, what is the most efficient method of getting through all these coordinates accurately - the coordinates are all relatively close to one another? Thanks for your time, John.

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• Can't access annotation property of subclassed uibutton - editted

  - by Tzur Gazit

  Below is my original question. I kept investigating and found out that the type of the button I allocate is of type UIButton instead of the subclassed type CustomButton. the capture below is the allocation of the button and connection to target. I break immediately after the allocation and check the button type (po rightButton at the debugger console). It's turned out tht the type is UIButton instead of CustomButton. CustomButton* rightButton = [CustomButton buttonWithType:UIButtonTypeDetailDisclosure]; [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside]; I have a mapView to which I add annotations. The pin's callout have a button (rightCalloutAccessoryView). In order to be able to display various information when the button is pushed, i've subclassed uibutton and added a class called "Annotation". @interface CustomButton : UIButton { NSIndexPath *indexPath; Annotation *mAnnotation; } @property (nonatomic, retain) NSIndexPath *indexPath; @property (nonatomic, copy) Annotation *mAnnotation; - (id) setAnnotation2:(Annotation *)annotation; @end Here is "Annotation": @interface Annotation : NSObject <MKAnnotation> { CLLocationCoordinate2D coordinate; NSString *mPhotoID; NSString *mPhotoUrl; NSString *mPhotoName; NSString *mOwner; NSString *mAddress; } @property (nonatomic, assign) CLLocationCoordinate2D coordinate; @property (nonatomic, copy) NSString *mPhotoID; @property (nonatomic, copy) NSString *mPhotoUrl; @property (nonatomic, copy) NSString *mPhotoName; @property (nonatomic, copy) NSString *mOwner; @property (nonatomic, copy) NSString *mAddress; - (id) initWithCoordinates:(CLLocationCoordinate2D)coordinate; - (id) setPhotoId:(NSString *)id url:(NSString *)url owner:(NSString *)owner address:(NSString *)address andName:(NSString *)name; @end I want to set the annotation property of the uibutton at - (MKAnnotationView *)mapView:(MKMapView *)pMapView viewForAnnotation:(id )annotation, in order to refer to it at the button push handler (-(IBAction) showDetails:(id)sender). The problem is that I can't set the annotation property of the button. I get the following message at run time: 2010-04-27 08:15:11.781 HotLocations[487:207] *** -[UIButton setMAnnotation:]: unrecognized selector sent to instance 0x5063400 2010-04-27 08:15:11.781 HotLocations[487:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UIButton setMAnnotation:]: unrecognized selector sent to instance 0x5063400' 2010-04-27 08:15:11.781 HotLocations[487:207] Stack: ( 32080987, 2472563977, 32462907, 32032374, 31884994, 55885, 30695992, 30679095, 30662137, 30514190, 30553882, 30481385, 30479684, 30496027, 30588515, 63333386, 31865536, 31861832, 40171029, 40171226, 2846639 ) I appreciate the help. Tzur.

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• Triangular bounding volumes

  - by Cheery

  I've come up with an alternative for beziers that might be easier to ray-trace, perhaps even though a plain vertex shader. Though there's missing a piece. I need to find the parametric surface equation from the surface normals I have for edge vertices. I also have to know it's peak and valley so I can constraint the depth of my bounding triangle. Image explains the overall idea: I build a bounding-volume from a control triangle. Then apply a function to each parametric coordinate of the triangle (s+t+u=1 where s,t,u = 0) to get the height coordinate for that certain point. Simply put, it produces a procedurally generated height-map for the triangle's surface. I just need to find a function that generates the height-map so I can make it work.

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• How to draw an UILabel in -drawRect: ?

  - by mystify

  Must I also do all this crazy coordinate system conversion stuff here, or is an UILabel different from an UIImageView drawing in -drawRect: ?

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• Python: Repeat elements in a list comprehension?

  - by User

  I have the following list comprehension which returns a list of coordinate objects for each location. coordinate_list = [Coordinates(location.latitude, location.longitude) for location in locations] This works. Now suppose the location object has a number_of_times member. I want a list comprehension to generate n Coordinate objects where n is the number_of_times for the particular location. So if a location has number_of_times = 5 then the coordinates for that location will be repeated 5 times in the list. (Maybe this is a case for a for-loop but I'm curious if it can be done via list comprehensions)

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• draw line with php using coordinates from txt file

  - by netmajor

  I have file A2.txt with coordinate x1,y1,x2,y2 in every line like below : 204 13 225 59 225 59 226 84 226 84 219 111 219 111 244 192 244 192 236 209 236 209 254 223 254 223 276 258 276 258 237 337 in my php file i have that code. This code should take every line and draw line with coordinate from line. But something was wrong cause nothing was draw :/: <?php $plik = fopen("A2.txt", 'r') or die("blad otarcia"); while(!feof($plik)) { $l = fgets($plik,20); $k = explode(' ',$l); imageline ( $mapa , $k[0] , $k[1] , $k[2] , $k[3] , $kolor ); } imagejpeg($mapa); imagedestroy($mapa); fclose($plik) ; ?> If I use imagejpeg and imagedestroy in while its only first line draw. What to do to draw every line ?? Please help :)

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• Draw and move a point over an image in python

  - by frx08

  Hi all I have to do a little script in Python. In this script I have a variable (that represents a coordinate) that is continuously updated to a new value. So I have to draw a red point over a image and update the point position every time the variable that contains the coordinate is updated. I tried to explain what I need doing something like this but obviously it doesn't works: import Tkinter, Image, ImageDraw, ImageTk i=0 root = Tkinter.Tk() im = Image.open("img.jpg") root.geometry("%dx%d" % (im.size[0], im.size[1])) while True: draw = ImageDraw.Draw(im) draw.ellipse((i, 0, 10, 10), fill=(255, 0, 0)) pi = ImageTk.PhotoImage(im) label = Tkinter.Label(root, image=pi) label.place(x=0, y=0, width=im.size[0], height=im.size[1]) i+=1 del draw someone may help me please? thanks very much!

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• Searching a 2D array for a range of values in java

  - by Paige O

  I have a 2^n size int array and I want to check if an element exists that is greater than 0. If the element exists, I want to divide the array by 4 and check if the coordinates of the found element are in the 1st, 2nd, 3rd or 4th quadrant of the array. For example, logically if the element exists in the first quadrant it would look something like this: If array[][] 0 && the row of that coordinate is in the range 0-(grid.length/2-1) && the column of that coordinate is in the range 0-(grid.length/2-1) then do something. I'm really not sure how to check the row and column index of the found element and store those coordinates to use in my if statement. Help!

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