transformation

I calculated the 3x3 homography matrix and I need to get rotation, translation, shear and scale to use them as parameters in the windows8 media element attributes ?! Tom Larkworthy see https://math.stackexchange.com/questions/78137/decomposition-of-a-nonsquare-affine-matrix def getComponents(normalised_homography): '''((translationx, translationy), rotation, (scalex, scaley), shear)''' a = normalised_homography[0,0] b = normalised_homography[0,1] c = normalised_homography[0,2] d = normalised_homography[1,0] e = normalised_homography[1,1] f = normalised_homography[1,2] p = math.sqrt(a*a + b*b)

I am using a SQL query and then transforming the result using Hibernates's Transformers.aliasToBean() . One of the columns in my query is an enum. The transformation somehow fails for the enum. What should I do? Which datatype should I use? I want more than 1 character to transform the result into my enum type. This is how the simplified version of my query/code looks like ( b is an enum in the table profiles): session.createSQLQuery("select a, b from profiles").setResultTransformer(Transformers.aliasToBean(Profile.class)) .list(); Exception : expected type: Foo.ProfileStateEnum, actual value:

Let's say I have a blue 3D box (where the top side is red colored). Now I call glScalef(1, 10, 1). Then I call glRotatef(90, 0, 1, 0). Then i render the cube. What i expected is to see the the red side facing and stretched towards the screen (along the Y axis of the model). But what im seeing is this: The red side is facing the screen (as expected). But the stretch is occurring on the Y axis of the view space (not the model). I do know that if I set the scale along the Z axis, then i'll get the right result. But my confusion is that i thought scaling up on the Y axis, then rotating the box,

How is it possible to distort paths in SVG in browser so that they are distorted to certain perspective using possibly javascript or css? The perspective distort can be made easily in Photoshop, Illustrator etc, but how about browsers? This is source path: And this is the path after transformation: This is my drag distort proposal ( share you knowledge, Q&A-style ). Live example is in http://jsfiddle.net/xjHUk/278/ and the main code is this: (only output window: http://jsfiddle.net/xjHUk/279/embedded/result/ ) function transferPoint (xI, yI, source, destination) { var ADDING = 0.001; // to

I would like to do something looking like what is done in How to use Data Transformers tutorial. But I would like to add a process and I can't find any example. In the symfony tutorial, data transformation is about changing an issue number to an Issue object. This is done in the reverseTransform() function of IssueToNumberTransformer public function reverseTransform($number) { if (!$number) { return null; } $issue = $this->om ->getRepository('AcmeTaskBundle:Issue') ->findOneBy(array('number' => $number)) ; if (null === $issue) { throw new TransformationFailedException(sprintf( 'An issue with