transformation

问题 Does anyone know if there is a way to "transform" specific sections of values instead of replacing the whole value or an attribute? For example, I've got several appSettings entries that specify the Urls for different webservices. These entries are slightly different in the dev environment than the production environment. Some are less trivial than others <!-- DEV ENTRY --> <appSettings> <add key="serviceName1_WebsService_Url" value="http://wsServiceName1.dev.domain.com/v1.2.3.4/entryPoint

问题 I have this function, -(void)transitionstar{ star.hidden = NO; star2.hidden = NO; star3.hidden = NO; star4.hidden = NO; star5.hidden = NO; star6.hidden = NO; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.4f]; [UIView animateWithDuration:0.0 animations:^{ CGAffineTransform scale = CGAffineTransformMakeScale(1, 1); CGAffineTransform rotate = CGAffineTransformMakeRotation(360.0); CGAffineTransform rotate2 = CGAffineTransformMakeRotation(-360.0); CGAffineTransform

问题 I have this function, -(void)transitionstar{ star.hidden = NO; star2.hidden = NO; star3.hidden = NO; star4.hidden = NO; star5.hidden = NO; star6.hidden = NO; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.4f]; [UIView animateWithDuration:0.0 animations:^{ CGAffineTransform scale = CGAffineTransformMakeScale(1, 1); CGAffineTransform rotate = CGAffineTransformMakeRotation(360.0); CGAffineTransform rotate2 = CGAffineTransformMakeRotation(-360.0); CGAffineTransform

问题 I have a shape (the red path below) and i have to apply to this path a TranslateTransform and a ScaleTransform transformation. But if i use the Shape RenderTransform property in this way: Path MyPath = new Path { Fill = new SolidColorBrush(Colors.Red) }; MyPath.Data = MyPathGeometry; TransformGroup transf = new TransformGroup(); transf.Children.Add(new TranslateTransform(50, 50)); transf.Children.Add(new ScaleTransform(2, 2)); MyPath.RenderTransform = transf; I get a drawing of this type:

问题 I have a shape (the red path below) and i have to apply to this path a TranslateTransform and a ScaleTransform transformation. But if i use the Shape RenderTransform property in this way: Path MyPath = new Path { Fill = new SolidColorBrush(Colors.Red) }; MyPath.Data = MyPathGeometry; TransformGroup transf = new TransformGroup(); transf.Children.Add(new TranslateTransform(50, 50)); transf.Children.Add(new ScaleTransform(2, 2)); MyPath.RenderTransform = transf; I get a drawing of this type:

问题 In this question Three.js: chaotic mesh rotation after applyMatrix I asked about an issue. Now I'll try to look at the issue from another end: to describe the desired behaviour of the program. I have an array of rotation matrices for each time point of object's state. Each rotation matrix represents a difference between some initial object state (point zero) and the desired state. User should be able at any time select any desired rotation matrix from the array. How to implement the correct

问题 I can't understand how scaling and rotation are applied to QGraphicsItem . I need to be able to apply rotation and scaling ( not necessarily keeping aspect ratio ) and I get fully unexpected results. Rotation must be around the item center. I seem to have no problem doing that - yet if I try to debug the bounding rectangle, I get seemingly wrong values. If I don't keep aspect ratio, instead of rotation I get a very weird skew, and I have been struggling for quite a while to find the cause and

问题 I can't understand how scaling and rotation are applied to QGraphicsItem . I need to be able to apply rotation and scaling ( not necessarily keeping aspect ratio ) and I get fully unexpected results. Rotation must be around the item center. I seem to have no problem doing that - yet if I try to debug the bounding rectangle, I get seemingly wrong values. If I don't keep aspect ratio, instead of rotation I get a very weird skew, and I have been struggling for quite a while to find the cause and

问题 i want to show my image view some arbitrary degrees tilted instead of just simple straight how to transform it to show tilted? Please help me. Edit this is the image view at present and i want like this only white bordered image view i want to tilt(slanted) not tiled 回答1: Just set the imageView s transform property: // 10 degrees imageView.transform = CGAffineTransformMakeRotation(M_PI / 180 * 10); 来源： https://stackoverflow.com/questions/10394376/how-to-display-imageview-tilted

问题 The example in the link below is using findHomography to get the transformation between two sets of points. I want to limit the degrees of freedom used in the transformation so want to replace findHomography with estimateRigidTransform . http://docs.opencv.org/doc/tutorials/features2d/feature_homography/feature_homography.html#feature-homography Below I use estimateRigidTransform to get the transformation between the object and scene points. objPoints and scePoints are represented by vector