This is a common problem with yaw, pitch and roll. You cannot get rid of it as long as you are using yaw, pitch and roll (Euler angles). This video explains why. I use rotation matrices instead of Euler angles in my motion sensing application. For an introduction to rotation matrices I recommend: Direction Cosine … Read more
Transform the coordinates of all four corners Find the smallest of all four x’s as min_x Find the largest of all four x’s and call it max_x Ditto with the y’s Your bounding box is (min_x,min_y), (min_x,max_y), (max_x,max_y), (max_x,min_y) AFAIK, there isn’t any royal road that will get you there much faster. If you are … Read more
Absent a clear question, a simple animation using your coordinate arrays is shown below. In general you can transform the graphics context (g2d) or the polygonal Shape itself (p3); the example shows both. Resize the window to see the effect of each. Note the last-specified-first-applied order of the transformations in at. First, a suitable point … Read more
Short answer: Get the rectangle of the original image and set the position. Get the rectangle of the rotated image and set the center position through the center of the original rectangle. Return a tuple of the rotated image and the rectangle: def rot_center(image, angle, x, y): rotated_image = pygame.transform.rotate(image, angle) new_rect = rotated_image.get_rect(center = … Read more
def rotate(l, n): return l[-n:] + l[:-n] More conventional direction: def rotate(l, n): return l[n:] + l[:n] Example: example_list = [1, 2, 3, 4, 5] rotate(example_list, 2) # [3, 4, 5, 1, 2] The arguments to rotate are a list and an integer denoting the shift. The function creates two new lists using slicing and … Read more
API 11 added a setRotation() method to all views.
The CSS Transforms spec explains this behavior. Elements with transforms act as a containing block for fixed position descendants, so position:fixed under something with a transform no longer has fixed behavior. They do work when applied to the same element; the element will be positioned as fixed, and then transformed.
To rotate by 45 degrees in IE, you need the following code in your stylesheet: filter: progid:DXImageTransform.Microsoft.Matrix(sizingMethod=’auto expand’, M11=0.7071067811865476, M12=-0.7071067811865475, M21=0.7071067811865475, M22=0.7071067811865476); /* IE6,IE7 */ -ms-filter: “progid:DXImageTransform.Microsoft.Matrix(SizingMethod=’auto expand’, M11=0.7071067811865476, M12=-0.7071067811865475, M21=0.7071067811865475, M22=0.7071067811865476)”; /* IE8 */ You’ll note from the above that IE8 has different syntax to IE6/7. You need to supply both lines of code … Read more
You can use canvas’ context.translate & context.rotate to do rotate your image Here’s a function to draw an image that is rotated by the specified degrees: function drawRotated(degrees){ context.clearRect(0,0,canvas.width,canvas.height); // save the unrotated context of the canvas so we can restore it later // the alternative is to untranslate & unrotate after drawing context.save(); // … Read more
The github project JavaScript-Load-Image provides a complete solution to the EXIF orientation problem, correctly rotating/mirroring images for all 8 exif orientations. See the online demo of javascript exif orientation The image is drawn onto an HTML5 canvas. Its correct rendering is implemented in js/load-image-orientation.js through canvas operations. Hope this saves somebody else some time, and … Read more