Since C (the language we’ll be using) doesn’t have native support for graphics, we’ll use the SFML library to help create the game. It will be assumed that you have already installed and set up SFML since this differs from platform to platform. See the SFML website for details on how to do this.
Download the appropriate development files or the whole SDK for your development environment, and extract the files to the directory of your choice. The SFML Development Files have been set up for a variety of operating systems and with some particular IDEs in mind already.
I have an object that needs to be able to be rotated around its center, but keeping the same origin (for setting position, etc). So, I figured I needed to use a Transform.
In case you installed SFML to a non-standard path, you'll need to tell the compiler where to find the SFML headers (.hpp files): g -c main.cpp -I /include Here, sfml-install-path is the directory where you copied SFML, for example /home/me/sfml. In the first lesson we will set up an SFML project. The next section will add in the Box2D library (which is a little harder to do than SFML). This tutorial uses Visual Studio 2015. However, SFML has a good tutorial on their site if your using another IDE.
Code is in Java (JSFML), but I figured the syntax was similar and able to be understood by anyone familiar with SFML.
getTextureCenter(Texture t) returns the center coordinates of t.
Now, when I apply this rotation, my sprites have a weird behavior. At first, using 45 degrees as a test, they completely disappeared from the screen. So then I tried 1 degree. The sprites affected seemed to have pieces 'cut off' and translated downward. Here's a picture, using 1 degree as an argument:
For context, I'm trying to rotate those white sprites (will be 'doors') so they fit properly in the corridor. E.g. horizontal on vertical cooridors, vertical on horizontal corridors. (The white part of the sprite is a placeholder for transparency, that's just there for debugging purposes.)
What should I do to be able to make this work properly? That is, how can I:
Rotate a sprite around its center
Keep the original origin (top left corner)
So, the problem was, that I wasn't accounting for the way Transform handles its transforms (that is, from (0, 0)). So, even if I tried rotating around the center of the texture (in this case a 16x16 texture), it would rotate all my sprites around (8, 8), which is why my results are odd. So, I changed my draw function to account for the position of the sprites:
Also, I needed to make sure I set the position of the sprites before rotation, as the draw() method would still think I was rotating them on (8, 8) otherwise (since the sprite's default position is (0, 0)).
WKWebView added as Subview is not resized on rotation in Swift
ios,swift,rotation,addsubview,wkwebview
I managed to solve the problem by using this line of code: self._webView!.autoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight :)..
How to rotate image to its next degree on button click event?
jquery,html,css,rotation,transform
Make changes in Jquery like following will work for your: $('body').on('click', '#button', function () { $('.north, canvas').rotate(getNextAngle()); }); Because on click of rotate your image is converted to canvas. Check Fiddle Edit: Change in JQuery as following to get your desired output as you mention in your question image. $('body').on('click',..
How can I rotate a font icon 45 degrees?
css,rotation,icons,icon-fonts
The reason why the icon does not rotate in it's 'raw' state is because it's default display setting is inline. You cannot apply transforms to inline elements like this. To solve the problem just apply `display:inline-block'. @font-face { font-family: 'Flaticon'; src:..
I imrotate() an image, draw two lines, rotate back the lines and draw them in orginal image, but don't get the expected result in MATLAB?
matlab,rotation,translation,image-rotation
I found the solution ! Well, what happens is that the built-in function imrotate does not only rotate by default the image, but it does also a translation so that the rotated-image fit in the figure. the solution is to use : I_R = imrotate(I,-45,'nearest','crop'); the important parameter here is..
JavaFX 8 Transform to pitch, yaw and roll rotation angles
matrix,3d,rotation,javafx-8
If you want to get the pitch, yaw and roll angles at any stage after several rotations, you can get them from the transformation matrix of the 3D model. If you have a look at the transformation matrix after several rotations: Transform T = model3D.getLocalToSceneTransform(); System.out.println(T); you'll see something like..
jQuery - Simple Text Rotator with click event
jquery,rotation
I don't think it's working because the text rotator plugin is removing and adding back the links in the DOM. You can get around this by using delegated event binding, as follows: $(function() { $('.sliding-text').on('click', 'a[href*=#]:not([href=#])', function() { // . your code here }); }); ..
Your code XMVECTOR quaternion = XMVectorSet(random_x, random_y, 0); is not creating a valid quaternion. First, if you did not set the w component to 1, then the 4-vector quaternion doesn't actually represent a 3D rotation. Second, a quaternion's vector components are not Euler angles. You want to use XMQuaternionRotationRollPitchYaw which..
SFML 2.3 and CodeBlocks error compilation
c++,compilation,codeblocks,sfml
Try reordering your links. Sfml system should last or first in your linker settings. It should the last of the SFML links.
Rotating charts in Chart JS
javascript,canvas,charts,rotation
There's no way to rotate the chartJS but not rotate the tips :- On the bright side, it's easy enough to code yourself from previous Stackoverflow posts! A polar chart is a set of concentric wedges as shown in this Stackoverflow post: Creating Polar Area Chart using Canvas Tooltips are..
Undefined symbols for architecture x86_64: CMMotionManager with SFML
c++,ios,objective-c,sfml
The problem ended up being that I did not include the dependencies of libsfml-window-s.a in my project. One of the required dependencies was CoreMotion.framework.
raphael js drag rotation in Firefox and Internet Explorer
javascript,rotation,raphael,drag
I can't see where 'event' is defined, you could try amending your handler function params to take the event direct like so.. moveNeedle = function (dx,dy,x,y,e) { .. var startDrag = function () { // console.log(this); }, dragger = moveNeedle, endDrag = function () {}; jsfiddle Edit: That should fix..
program linked to SFML dlls wont start, returns 0xC000007B or missing __gxx_personality_v0
c++,dll,sfml
Due to C++ ABI incompatibility the SFML libraries must be built with the same exact compiler as your application gets built with. If you don't use this MinGW compiler, you'll have to rebuild SFML by yourself..
MATLAB: How to make camera light follow 3D Rotation
matlab,user-interface,3d,rotation,lighting
Implement own rotation functionality You can implement an own functionality to adjust the axes and the lights at the same time. This way the light gets adjusted continuously while rotating the axes. function follow_me_1 figure axes('buttondownfcn', @buttondownfcn); % assign callback set(gca,'NextPlot','add'); % add next plot to current axis surf(peaks,'hittest','off'); %..
Rotate Point3D around Unit Vector, Solved
c#,wpf,rotation,quaternions
The problem was that i didnt save the result of Matrix Transform point3D = matrix.Transform(point3D); // now point3D rotates as it should be ..
C - matrix rotation
c,matrix,rotation
Here's an idea. I've implemented it in Java, but it should work in the same manner in C. The idea is to read the array row major wise from the end, and fill the other array column major wise, from the beginning. int a[][]={{1,4},{2,5},{3,6}}; int m=3,n=2; //you will need to..
CSS3 animation function for smooth 3D revolution?
css,css3,rotation,css-animations
If you want to move you element in a 3d environement, you can use the perspective property and actual 3d rotation. Right now you are animating on straight lines between positions so simulating a rotation is almost imposible. I built the following example, you will need to tweak the size..
WPF Rotate an Image and align it
wpf,xaml,rotation,rendertransform
The problem is that the Transforms were applied after the layout pass. You should use a LayoutTransform to perform the transformation before the layout is calculated: <Image Name='ImageTarget' HorizontalAlignment='Left' VerticalAlignment='Top' Stretch='Uniform' RenderTransformOrigin='.5,.5'> <Image.LayoutTransform> <TransformGroup> <ScaleTransform ScaleX='{Binding Main.BindedViewMode, Converter={StaticResource ImageSizeConverter}}' /> <ScaleTransform ScaleY='{Binding Main.BindedViewMode,..
How To Set Up Sfml In Dev C 2b 2b 1b
Java ArrayList Adding objects --> Throw out old ones
java,arraylist,rotation
You can do it without the loop. Assuming the ArrayList already contains 5 elements : oldestElement = latestTransactions.remove(0); // this will remove the element at the 0 index // and decrement the index of all the others Then latestTransactions.add(newElement); // will add the new element at the end (index 4)..
CSS rotate animation with pulse
html,css,animation,rotation,frontend
This is a guess since I don't know how you html (markup). You have to add all the transform properties on each step in the keyframe. So if any of the keyframes have sett: transform: scale(2); Then it will only scale. So you have to set all the transfrom properties..
Movement of sprite using fixed time step
c++,game-engine,game-physics,sfml,movement
object.speed = object.speed * TimePerFrame.asSeconds(); This line is reducing the speed every frame until it is 0. You need to scale the movement distance by delta time whenever you move the object. Try this: float distance = speed * TimePerFrame.asSeconds(); sprite.move(cos(sprite.getRotation()*PI / 180) * distance, sin(sprite.getRotation()*PI / 180) * distance);..
rotating around objects
opengl,rotation,jogl,coordinate,orbit
7.07 is the value of r in your code, which is the distance of your point from the origin: sqrt(5 * 5 + 5 * 5) = sqrt(50) = 7.0711 With both angles being zero, all the cos() values will be 1.0, and the sin() values 0.0. Which means that..
Adjusting views when Status Bar hides on rotation
ios,rotation,autolayout,uistatusbar
The correct approach is: Use a normal toolbar with a normal height - do not set any constraint on the height. Add leading constraint 0 to superview (not superview margin), trailing constraint 0 to superview (not superview margin). Add top constraint 0 to top layout guide. This will appear to..
I believe you want to use the Gram-Schmidt process here, which finds an orthogonal basis for a set of vectors. If V is not orthogonal to M[0], you can simply change M[0] to V and run Gram-Schmidt, to arrive at an orthogonal basis. If it is orthogonal to M[0], instead..
How to read a bitmap from the Windows Clipboard
c++,windows,bitmap,sfml
Learn the bitmap structure from Wikipedia and then write it out to a file and then write out the pixels. I've tested the below with Paint on Windows 8.1. I opened an image with paint and then pressed Ctrl + C to copy to the clipboard. then I ran the..
Snake Game - Collision I have no idea
c++,sfml
Given a sf::RectangleShape you can construct a sf::FloatRect (which is just sf::Rect<float>) and then call sf::FloatRect::intersects between two sf::FloatRect. As an example: sf::RectangleShape a(.); sf::RectangleShape b(.); sf::FloatRect a_rect(a.getPosition(), a.getSize()); sf::FloatRect b_rect(b.getPosition(), b.getSize()); if (a_rect.intersects(b_rect)) { // .. } ..
Reversing RotateAxisAngle back to angles
c++,matrix,rotation,geometry,axis
OK, I'm going to take another stab at this. My first answer was for XYZ order of rotations. This answer is for ZYX order, now that I know more about how MathGeoLib works. MathGeoLib represents position vectors as column vectors v = [x y z 1]^T where ^T is the..
How to rotate selected QGraphicsItems around the selection center?
qt,rotation,selection,qgraphicsitem
You need to rotate and move each item individually, so that they can be later moved to another scene independently. You can manually calculate new rotations and positions: void Form2::on_rotate_clicked() { QRectF rect; foreach(QGraphicsItem* item, scene->selectedItems()) { rect |= item->mapToScene(item->boundingRect()).boundingRect(); } QPointF center = rect.center(); qreal angle = 10; QTransform..
Linker error with SFML
c++,linker-error,sfml
There are two ways to solve this issue. The first is to swap some of the options so the command goes like this: g++ main.cpp -lsfml-window -lsfml-graphics -lsfml-system. The second option is to try updating g++ to version 4.9.2, which can be achieved on ubuntu by doing this
Rotate animation after Translate doesn't work on Android
android,animation,rotation,translate
like this: here you have to caliculate the distance of the target position after translate animation, EDIT: float pivotX=(getResources().getDisplayMatrics().widthPixcels/100)*83; RotateAnimation animation2 = new RotateAnimation(0,90,Animation.RELATIVE_TO_PARENT,pivotX,Animation.RELATIVE_TO_PARENT,0); ..
rotating a square in javascript
javascript,canvas,rotation,geometry
You could manually implement a transformation matrix. This allows you to set up the matrix for both read and write, then apply it to the points returning absolute points with the new actual values without the need or hassle to make special code for each use-case. The formula for the..
Controlling/moving an object in a circular motion in Unity
c#,unity3d,rotation,position
float timeCounter = 0; void Update () { timeCounter += Input.GetAxis('Horizontal') * Time.deltaTime; // multiply all this with some speed variable (* speed); float x = Mathf.Cos (timeCounter); float y = Mathf.Sin (timeCounter); float z = 0; transform.position = new Vector3 (x, y, z); } ..
Change the way i load resources
c++,sfml
What works for me is to have a ResourceManager class, which contains a hash table mapping resource names (or paths, if you prefer) to the actual resource instances (sf::Sound, sf::Texture). When a user requests a certain resource (e.g., by calling ResourceManager::getTexture('res/texture.png')), the ResourceManager class checks if a texture with name..
Is it possible to rotate a vector in 3D space using quaternions only?
How To Set Up Sfml In Dev C 2b 2b Download
c++,rotation
Your function rotates by angles in radians but you input angles in degrees. You should either input angles in radians, or convert from degrees to radians at the top of the function.
Separating axis theorem: rotation around center of mass
This should work whether or not polygon origin is aligned to center of gravity. I'll start with the most important stuff, and end with supporting methods that have changed. Edit: Revised implementation. struct Response { Response() : overlap(std::numeric_limits<double>::max()) {} Vector2D axis; double overlap; }; bool FindAxisLeastPenetration(const Polygon& a, const Polygon&..
Rotate a grid of points in C++
c++,math,rotation,grid,geometry
float x_old = p.x; float y_old = p.y; p.x = x_old * cos(a) - y_old * sin(a); p.y = x_old * sin(a) + y_old * cos(a); Of course, if you are rotating many points by the same angle, you will want to save the sin & cos, instead of calculating..
Tile-based Movement and Animation
c++,animation,sprite,sfml
You could use a FSM so something along the lines of. // Visual states of the character. enum class State { WALKING, STANDING, ATTACK, }; State character_state = State::STANDING; // Change on input (or other things like impact.) if(input.up() || input.down() || input.left() || input.right) character_state = State::WALKING; else character_state..
How to rotate an image R raster
r,plot,rotation,raster
For the 90 degree rotations, this is an easy solution: image(t(flip(x, 1))) image(t(flip(x, 2))) plotRGB(t(flip(x, 1))) plotRGB(t(flip(x, 2))) For the 45 degree and 135 degree rotation, it will be a bit trickier. There are probably other ways, but I'll use the persp function and give different angles to the theta..
Smooth camera rotation unity
unity3d,camera,rotation,unityscript
I suggest to use Linear Interpolation (lerp function) as also suggest JinJi in the comment. Here is the official tutorial The Lerp function will change the value from to the value to smoothly at the interval time. Lerp(float from, float to, float time) With your code, you code do something..
Rotate Icon 360 degrees clockwise angularjs
javascript,angularjs,rotation
only blue box rotate when you click blue box <button >Rotate <div ng-controller='fullRotation' ng-click='fullRotate()'></div> </button> Only blue box rotate when you click button $scope.fullRotate = function() { console.log('im here'); $element.children().css('transition', 'transform 800ms ease'); $element.children().css('transform', 'rotate(' + degrees + 'deg)'); degrees += 360; }; other way is to add..
jQuery - Simple Text Rotator with a href links
jquery,rotation
How To Set Up Sfml In Dev C 2b 2b Answer
It appears that the library is set up to only rotate using jQuery's .text() method. As such, any extraneous HTML will be parsed out when the text array is built. A few modifications to the library code will fix the problem for you. var el = $(this) var array =..
Rotating four lines around a common point
c++,vector,rotation
Seems like it happens because you're rotating lines relatively to the first point of the line. So, rotate not the line relatively to the first point, but rotate two points separately. Update: if you have an anchor (xa, ya), and you want to rotate the point (x, y) around it..
Get current rotation in degrees of group in snap.svg
svg,rotation,snap.svg
You can access elements matrices via the transform() function (with no parameters). That will provide localMatrix which is probably what you want (if there are no nested transforms or anything). Then there is a function split() which will show the different parts of the matrix. Using your SVG code above,..
Custom C++ Quaternion Rotation Not Working Correctly
c++,rotation,vector-graphics,quaternions
I ended up deciding to just incorporate GLM into my math classes and after some changing of things, everything works as it should.
Unwanted database file being generated, how to prevent and remove?
The sdf file is created and owned by Visual Studio, not your program. When you open a solution Visual Studio will check to see if this file exists. If it doesn't VS will create one and populate it with code browsing and other information about the projects it manages. If..
How to spin and rotate in css?
html,css,rotation
Its because you are using keyFrame, you can achieve this with transform alone. Take a look at this: (Also, hovering an img while its moving is not an easy task) img{ border-radius:50%; -webkit-transition: -webkit-transform .8s ease-in-out; -ms-transition: -ms-transform .8s ease-in-out; transition: transform .8s ease-in-out; } button:hover + img { position:..
cmake target_link_libraries() launching error Cannot specify link libraries for target “debug”
How To Set Up Sfml In Dev C 2b 2b 1
c++,api,cmake,sfml
EXECUTABLE_NAME is not set in target_link_libraries command, so in a debug build target_link_libraries(${EXECUTABLE_NAME} ${SFML_LIBRARIES}) is expanded to target_link_libraries(debug path/to/debug/library optimized path/to/release/library .. ) The first argument is treated as target name so you see the error Error:Cannot specify link libraries for target 'debug' which is not built by this project..
Error while loading shared libraries: libsfml-graphics.so.2.2.0
c++,linux,shared-libraries,sfml
This answer relies on libsfml-dev being installed on your system. The way to fix it is removing all SFML options from the Search Directories>Linker, then make sure the linker settings looks something like this: This means that CodeBlocks will link to the default place. Afterwards recompile the code (Edit the..
How to rotate a THREE.PlaneBufferGeometry with THREE.WaterShader and MirrorMesh
rotation,three.js,shader
I managed to solve my problem. As I thought there is something to be changed at the WaterShader.js file. At the vertexShader (line 24) you need to change the line 34 from : worldPosition = mirrorCoord.xyz to worldPosition = mirrorCoord.xzy and the problem is solved!..
You should use the rotate attribute as Lars Kotthoff already mentioned. As you're basically creating a rect I replaced your path with a svg:rect for convenience. The following code does the rotation by rotating the g element. This way you can crate any number of shapes inside and they will..