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  • Rectangle Rotation in Python/Pygame

    - by mramazingguy
    Hey I'm trying to rotate a rectangle around its center and when I try to rotate the rectangle, it moves up and to the left at the same time. Does anyone have any ideas on how to fix this? def rotatePoint(self, angle, point, origin): sinT = sin(radians(angle)) cosT = cos(radians(angle)) return (origin[0] + (cosT * (point[0] - origin[0]) - sinT * (point[1] - origin[1])), origin[1] + (sinT * (point[0] - origin[0]) + cosT * (point[1] - origin[1]))) def rotateRect(self, degrees): center = (self.collideRect.centerx, self.collideRect.centery) self.collideRect.topleft = self.rotatePoint(degrees, self.collideRect.topleft, center) self.collideRect.topright = self.rotatePoint(degrees, self.collideRect.topright, center) self.collideRect.bottomleft = self.rotatePoint(degrees, self.collideRect.bottomleft, center) self.collideRect.bottomright = self.rotatePoint(degrees, self.collideRect.bottomright, center)

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  • 2D pixel array rotation and scaling

    - by Betamoo
    Hi I am working on C# program to process images ( given as int[,] ).. So I have 2D array of pixels, and I need to rotate them around a point, then scale them down to fit the original array.. I already found articles about using matrix to transform to a point and rotate then transform back.. What remains is to scale the resultant image to fit an array of original size.. How that can be done? (preferably with 2 equations one for x and one for y ) Thanks in advance

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  • upload multiple images, display thumbnails, manipulate image

    - by robert
    hy, i need a little help here i want to be able to upload multiple images after i upload all i want to display thumbnails, when i click on a thumb i want to be able to rotate the image (rotate the original image not only the thumb) All uploaded images i want to be in one php array, in the order they have been uploaded. Or if i can to change the order of the images, i know is possible with jQuery! how i can code this?? i started but i can't get this done! here is my project so far: http://www.mediafire.com/?3uzzgx5onzn any help is welcome! Thanks!

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  • can't rotate display on windows 7

    - by Barry Fandango
    I'm running 64-bit windows 7 on a dell inspiron 1525 with an Intel 965 graphics chipset. When I bring up the "screen resolution" settings, I can set up my primary and secondary display (the laptop + an LCD monitor) but there is no option for rotation. I'm used to using this feature at work so I was surprised to see it missing. I installed dell's latest drivers for this chipset (although they were not marked as w7 or 64 bit) and no change. Any idea what's going on here? Thanks superusers!

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  • Auto-rotate rotated images with mogrify

    - by Frank Presencia Fandos
    Some of my images have been taken rotated but kept this data. The problem is that, when using mogrify to convert them from JPG to png, that data seems to dissapear. For showing this problem, I think the best is to show the script and an screenshot. Script with the code. Put it in a text file, give it execution permission, double click, run (from terminal if you wish) and wait a while. All the JPGs in that folder will be converted to png. #! /bin/bash echo "Converting JPG to png. Please don't close this window." mogrify -alpha on -format png *.JPG mogrify -alpha on -format -alpha on png *.jpg It works great and adds an alpha channel. This is personally useful when I edit them later, not to add the channel individually. Now the screenshot that illustrates the problem: As you can see, the original ones' (JPGs) preview is right, the modified preview is wrong, the Shotwell rendering is right and the GIMP edit is wrong and didn't even say the image was rotated, as it uses to do with other images. How can I edit my script to preserve the orientation?

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  • Proper way to rotate Nginx logs

    - by depesz
    I would like to achieve rotation of nginx logs that: would work without any extra software (i.e. - best if without "logrotate") would create rotated files with names based on date Best approach is something like PostgreSQL has - i.e. in it's log_filename config variable I can specify strftime-style %Y-%m-%d, and it will automatically change log on date (or time) change. Another approach from apache - sending logs via pipe to rotatelogs program. As far as I was able to search - no such approach exists. All I can do, is to use logrotate with dateext option, but it has it's own set of drawbacks, and I'd rather use something that works like |rotatelogs or log_filename in PostgreSQL.

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  • Rotate webpage via code?

    - by Adam Davis
    I'm hoping that there's a relatively simple way to rotate a webpage a little bit, 30 degrees or so, while still leaving it fully functional and usable. I completely control the page, and can modify it to make this easier if needed. I'd rather not re-write the whole thing in SVG, though, but perhaps javascript and canvas will work? Is there a way using CSS, Javascript, or some other cross browser method that would allow me to accomplish this?

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  • boost ublas: rotate 2d vector

    - by AndreasT
    Erm. I hope I am seriously overlooking something. I want to rotate a 2d vector (kartesian) v by a certain angle phi. I can't find a function that generates the appropriate matrix or just performs that function. I know how to do this by hand. I am looking for a ublas utility "something" that does this for me.

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  • Image rotate with JQuery and PHP

    - by robertdd
    i have a list of thumbnails! i am able to rotate a image with jquery, but after i refresh the page, the image is the same! i want to make a SAVE button to save all the edited images? how i can save the edited image on the server side? thanks

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  • rotate a plane around a diagonal

    - by compie
    I would like to rotate a plane, not around a single (X or Y) axis, but around the diagonal (45 degrees between X and Y). How do I calculate the Rx and Ry given the Rdiagonal? (Rdiagonal is the amount of rotation I would like to achieve around the diagonal axis).

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  • HTML5 Canvas: How to make a loading spinner by rotating the image in degrees?

    - by Bill
    I am making a loading spinner with html5 canvas. I have my graphic on the canvas but when i rotate it the image rotates off the canvas. How do I tell it to spin the graphic on its center point? <!DOCTYPE html> <html> <head> <title>Canvas test</title> <script type="text/javascript"> window.onload = function() { var drawingCanvas = document.getElementById('myDrawing'); // Check the element is in the DOM and the browser supports canvas if(drawingCanvas && drawingCanvas.getContext) { // Initaliase a 2-dimensional drawing context var context = drawingCanvas.getContext('2d'); //Load the image object in JS, then apply to canvas onload var myImage = new Image(); myImage.onload = function() { context.drawImage(myImage, 0, 0, 27, 27); } myImage.src = "img/loading.png"; context.rotate(45); } } </script> </head> <body> <canvas id="myDrawing" width="27" height="27"> </canvas> </body> </html>

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  • Refactoring a javascript array rotate function

    - by ideotop
    I wrote a rotate function, but I'm not satisfied with it: var pixels=['011','110','000']; var result=new Array(); result=['000','000','000']; for ( y=0; y<(pixels.length); y++ ){ for ( x=0; x<(pixels.length); x++ ){ var newx=0,newy=0; if ( clock ){ if ( x< r.x && y< r.y ) {newx=x+2;newy=y ;}//top left if ( x==r.x && y< r.y ) {newx=x+1;newy=y+1;}//top if ( x> r.x && y< r.y ) {newx=x ;newy=y+2;}//top right if ( x< r.x && y==r.y ) {newx=x+1;newy=y-1;}//left if ( x==r.x && y==r.y ) {newx=x ;newy=y ;}//center if ( x> r.x && y==r.y ) {newx=x-1;newy=y+1;}//right if ( x< r.x && y> r.y ) {newx=x ;newy=y-2;}//bottom left if ( x==r.x && y> r.y ) {newx=x-1;newy=y-1;}//bottom if ( x> r.x && y> r.y ) {newx=x-2;newy=y ;}//bottom right } else { if ( x< r.x && y< r.y ) {newx=x ;newy=y+2;}//top left if ( x==r.x && y< r.y ) {newx=x-1;newy=y+1;}//top if ( x> r.x && y< r.y ) {newx=x-2;newy=y ;}//top right if ( x< r.x && y==r.y ) {newx=x+1;newy=y+1;}//left if ( x==r.x && y==r.y ) {newx=x ;newy=y ;}//center if ( x> r.x && y==r.y ) {newx=x-1;newy=y-1;}//right if ( x< r.x && y> r.y ) {newx=x+2;newy=y ;}//bottom left if ( x==r.x && y> r.y ) {newx=x+1;newy=y-1;}//bottom if ( x> r.x && y> r.y ) {newx=x ;newy=y-2;}//bottom right } //inject(result,newx,newy,pixels[y][x]) } } does someone now how to write a cleaner code for this rotate (clock and counter-clock) function ?

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  • Move rotating image along Canvas

    - by fatnic
    Hi. I've managed to make an image rotate on my canvas. And I've managed to make an image move along the canvas. My problem now is making it do both. I have got it working but I seems a bit like a hack. I've posted a demo online Here's the code. var cnv = document.getElementById("drawing"); var c = cnv.getContext('2d'); var image = new Image(); image.src = 'images/spaceship.png'; var imgWidth = image.width; var imgHeight = image.height; var i=0; function animate() { c.clearRect(0,0,640,480); c.save(); c.translate(-(imgWidth/2)+i,200); c.rotate(i * Math.PI/180); c.translate(-(imgWidth/2),-(imgHeight/2)); c.drawImage(image, 0, 0); c.restore(); (i==640+imgWidth) ? i=0: i+=2; }; setInterval(animate, 1); I think my problem is I'm not understanding the translate() method properly. Is this the correct way to do it or am I competely way off?

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  • Arduino: Putting servos in my class causes them to rotate all the way to one side

    - by user2526712
    I am trying to create a new class that controls two servos. My code compiles just fine. However, when I run it, the servos just turn all the way to one direction. This seems to happen when I try instantiating the class (when in the constructor, I attach the servos in the class to pins). In My class's header file, I have [UPDATED] #ifndef ServoController_h #define ServoController_h #include "Arduino.h" #include <Servo.h> class ServoController { public: ServoController(int rotateServoPin, int elevateServoPin); void rotate(int degrees); void elevate(int degrees); private: Servo rotateServo; Servo elevateServo; int elevationAngle; int azimuthAngle; }; #endif Code so far for my Class: #include "Arduino.h" #include "ServoController.h" ServoController::ServoController(int rotateServoPin, int elevateServoPin) { azimuthAngle = 0; elevationAngle = 0; elevateServo.attach(elevateServoPin); rotateServo.attach(rotateServoPin); } void ServoController::rotate(int degrees) { //TO DO rotateServo.write(degrees); } void ServoController::elevate(int degrees) { //TO DO elevateServo.write(degrees); } And finally my arduino sketch so far is just: #include <ServoController.h> #include <Servo.h> ServoController sc(2 , 3); void setup() { } void loop() { } I'm pretty sure the circuit I am using is fine, since if I do not use my class, and just use the servo library directly in my arduino file, the servos move correctly. any ideas why this might happen? [UPDATE] I actually got this working. In my constructor, I have removed the lines to attach the servos to pins. Instead, I have added another method to my class which does the attachment. ServoController::ServoController(int rotateServoPin, int elevateServoPin) { azimuthAngle = 0; elevationAngle = 0; // elevateServo.attach(elevateServoPin); // rotateServo.attach(rotateServoPin); } void ServoController::attachPins(int rotateServoPin, int elevateServoPin) { azimuthAngle = 0; elevationAngle = 0; elevateServo.attach(elevateServoPin); rotateServo.attach(rotateServoPin); } I then call this in my sketch's setup() function: void setup() { sc.attachPins(2,3); } It seems like if I attach my servos outside of the setup() function, my problem occurs. [UPDATE July 27 9:13PM] Verified something with another test: I created a new sketch where I attached a servo before setup(): #include <Servo.h> Servo servo0; servo0.attach(2); void setup() { } void loop() // this function runs repeatedly after setup() finishes { servo0.write(90); delay(2000); servo0.write(135); delay(2000); servo0.write(45); delay(2000); } When I try to compile, Arduino throws an error: "testservotest:4: error: expected constructor, destructor, or type conversion before '.' token" So there was an error, but it was not thrown when the attach method was called from a class Thanks very much

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  • iPad: SplitView does not rotate

    - by raj.tiwari
    I have the following setup: A subclass of UISplitViewController that creates the master and detail view controllers in the constructor. Master and Detail view controllers that both override shouldAutorotateToInterfaceOrientation to return `YES'. Detail view controller implements the UISplitViewControllerDelegate protocol and deals with the popover. I am observing two weird issues that might be interrelated: When the split view comes up (in portrait mode - default on simulator), the Master view is visible. It should not be. When I rotate the simulator, the view does not "right" itself. My UISplitViewController subclass does not override shouldAutorotateToInterfaceOrientation. However, both master and details view controllers do and return YES. Any ideas what I might be doing wrong? Is this a simulator bug? Thanks. -Raj

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  • Rotate two dimensional array 90 degrees clockwise

    - by user69514
    I have a two dimensional array that I need to rotate 90 degrees clockwise, however I keep getting arrayindexoutofbounds... public int[][] rorateArray(int[][] arr){ //first change the dimensions vertical length for horizontal length //and viceversa int[][] newArray = new int[arr[0].length][arr.length]; //invert values 90 degrees clockwise by starting from button of //array to top and from left to right int ii = 0; int jj = 0; for(int i=0; i<arr[0].length; i++){ for(int j=arr.length-1; j>=0; j--){ newArray[ii][jj] = arr[i][j]; jj++; } ii++; } return newArray; }

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  • PHP - Rotate a HEX color value (eg swap all colors with "next" hex)

    - by Joe
    I have a set of hex values in an array in PHP. On my page, I have a slider which the user can "slide" to return a value between 1-100. I want to then, based on this slider value, swap all the colors in the array based on the colors "next" color based on the position in the array. An example of the same sort of thing would be like in photshop where you can rotate the hue of a layer. I want to do the same thing, in PHP, for a hex value. Any clues?

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  • Rotate a feature programatically Open Layers

    - by Ozaki
    TLDR I want to rotate a Feature in my open layers. I want it to face a certain heading that I am receiving from server. I know that you can make a feature spin on a point or so on: window.setInterval(function() {rotateFeature( pointFeature, 360 / 20, origin)}, 100); as from the open layers example. But I want to be able to face it towards a heading I am given, so. Can I face a feature towards a heading? Can I face a feature(image) in the same way? If not is it possible to automatically calculate the rotation required and position it that way? Or any ideas on how I could do this with the image? (hoping not to have 360 images) Thanks in advance.

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  • How to rotate an SSE/AVX vector

    - by user1584773
    I need to perform a rotate operation with as little clock cycle as possible. In the first case let's assume __m128i as source and dest type source: || A0 || A1 || A2 || A3 || dest : || A1 || A2 || A3 || A0 || dest = (__m128i)_mm_shuffle_epi32((__m128i)source, _MM_SHUFFLE(0,3,2,1)); Now I want to do the same whit AVX intrinsics So let's assume this time __m256i as source and dest type source: || A0 || A1 || A2 || A3 || A4 || A5 || A6 || A7 || dest : || A1 || A2 || A3 || A4 || A5 || A6 || A7 || A0 || The Avx intrinsics is missing most of the corresponding SSE integer operations. Maybe there is some way go get the desider output working with the floating point version. I've tryed with: dest = (__m256i)_mm256_shuffle_ps((__m256)source, (__m256)source, _MM_SHUFFLE(0,3,2,1)); but what I get is: || A0 || A2 || A3 || A4 || A5 || A6 || A7 || A1 || Any Idea on how to solve this in an efficient way? (without mixing SSE and AVX operation and without "manually" inverting A0 and A1 Thanks in advance!

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  • Rotate Windows.Documents.Table

    - by Neverrav
    I need to rotate a table clockwise up to 90 degrees. It's one of the blocks of a FlowDocument. Is there a way to apply some kind of rotation to a Table? The possible solution of creating TextEffect like this: var table = new Table(); ... // fill the table here var effect = new TextEffect { Transform = new RotationTransform(90), PositionStart = 0, PositionCount = int.MaxValue }; table.TextEffects = new TextEffectCollection(); table.TextEffects.Add(effect); doesn't work.

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  • Rotate array clockwise

    - by user69514
    I have a two dimensional array that I need to rotate 90 degrees clockwise, however I keep getting arrayindexoutofbounds... public int[][] rorateArray(int[][] arr){ //first change the dimensions vertical length for horizontal length //and viceversa int[][] newArray = new int[arr[0].length][arr.length]; //invert values 90 degrees clockwise by starting from button of //array to top and from left to right int ii = 0; int jj = 0; for(int i=0; i<arr[0].length; i++){ for(int j=arr.length-1; j>=0; j--){ newArray[ii][jj] = arr[i][j]; jj++; } ii++; } return newArray; }

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  • UIVIewController wrong position before rotate

    - by zegnus
    I have the starter point of my application this window (white background): - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { mainScreen = [[MainScreenController alloc] initWithNibName:@"MainScreenController" bundle:[NSBundle mainBundle]]; // add it to the main window [window addSubview:[mainScreen view]]; // show view [window makeKeyAndVisible]; NSLog(@"started"); return YES; } And MainScreenController is an UIViewController with (blackBackground) created by the Interface Builder. The application executes perfectly but the first time, the black view is moved up like the height of the status iphone pannel (leaving white rectangle at the bottom). If I rotate the iPhone twice, the view is perfectly positioned in the right place, filling all the screen with the black background. Any idea? Thanks!

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