draw

I want to simulate the flow around objects in two dimensions. Therefore I wrote a program in C which uses the Navier-Stokes equations to describe the motion of fluids. Now I came to the point where I actually want more than just placing a rectangle in the simulation domain. To draw such a rectangle I just do something like: for(int i=start_x; i<end_x; i++) for(int j=start_y; j<end_y; j++) M[i][j] = 1; // barrier cell = 1 Doing this I get a nice rectangle. No surprise. But what would be an approach if I want to simulate the flow around a circle, a cross, a triangle, a wing profile or any other

I am drawing a graph using the plot() function, but by default it doesn't show the axes. How do we enable showing the axes at x=0 and y=0 on the graph? Actually my graph is something like: And I want a horizontal line corresponding to y=0 . How do I get that? By default, plot does show axes, unless you've modified some settings. Try the following hold on; % make sure no new plot window is created on every plot command axes(); % produce plot window with axes plot(% whatever your plot command is); plot([0 10], [0 0], 'k-'); % plot the horizontal line dysan This should work in Matlab: set(gca,

It is not good idea to construct path object every time when call Draw method. Is it better to keep path object and clear/set points every time? Update: One more question - what is difference between 'reset' and 'rewind' path object? Yes, it is better to reset the path and set the points rather than instatiating a new one. This prevents excessive allocation of memory, which can lead to frequent garbage collection. When the GC runs the graphics may pause for a moment, especially on older devices so you want to keep this to a minimum. The reset() and rewind() methods both have pretty much the

Is there a framework I can use to draw lines with touch. Basically I want to add ability for a customer to sign on iPad/iPhone and capture it as an image. Any help much appreciated. Thanks. you can meet your requirement by using core graphics available in UIKIT framework. i had a similar requirement in my application with a different use ,if needed i can provide you the code. TNQ .h file #import <UIKit/UIKit.h> typedef enum _DrawingMode{ DrawingModePen =0, DrawingModeEraser=1, } DrawingMode; @interface DrawingView : UIView { CGPoint lastPoint; UIImageView *drawImage; BOOL mouseSwiped; int

How to display only the corners of a UIView? let view = UIView() view.layer.borderColor = UIColor.white.cgColor view.layer.borderWidth = 2 let maskframe = UIView(frame: CGRect(x:0, y:0, width:view.frame.width, height:view.frame.height)) view.layer.mask = maskframe.layer.` This masks only the right edge and i dont understand how it works either. Try with this class , here I use a custom view drawing using CoreGraphics , added some Inspectable variables to help with customization // // CornerView.swift // CornersViewSO // // Created by Reinier Melian on 5/31/17. // Copyright © 2017 Reinier

I'm new with Google Charts and I am not able to obtain a fine result with the texts surrounding the graph. This is how my chart looks: As you can see, it does cut both Horizontal-Axis and Legends, so the final result is not as good as It could be. Is there a way to solve this? I've been reading the official documentation and some posts from here, but I haven't found the way to do this. Recap: How do we modify the legend or the axis texts so they are fully visible? After some time experimenting, I daresay it is not posible to choose how much part of the words on legend or axis you can show.