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Flickering rectangle using AS3 and drawRect() when using math for coordinates

Instead of redrawing the rectangle each frame you could simply scale it.

var mc:MovieClip = new MovieClip();;,0,1,1);;

stage.addEventListener(Event.ENTER_FRAME, loop);
function loop(e:Event) {
    mc.scaleX = mouseX;
    mc.scaleY = mouseY; 

Categories : Actionscript

Related to : Flickering rectangle using AS3 and drawRect() when using math for coordinates
Given the coordinates how to find if they make a rectangle using C++ programms?
check this clever solution from this link find the center of mass of corner points: cx=(x1+x2+x3+x4)/4, cy=(y1+y2+y3+y4)/4 test if square of distances from center of mass to all 4 corners are equal bool isRectangle(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4) { double cx,cy;

Categories : C++
R: Need to populate a matrix with counts of coordinates (from data frame with list of coordinates, some of which are duplicates)
Here's one approach, using the data.table and Matrix packages: library(data.table) library(Matrix) f <- function(df, nx, ny) { ## Tally up the frequencies dt <- data.table(df, key=c("x", "y")) xyN <- dt[, .N, by=key(dt)] ## Place counts in matrix in their respective i/j x/y row/column as.matrix(with(xyN, sparseMatrix(i=x,j=y,x=N,dims=c(nx,ny)))) } ## Check that it

Categories : R
Is it possible to convert Pointer Coordinates to Map Coordinates (Location / Geocoordinates)?
Why not grab the coordinate information from the pushpin. That's the coordinate you are likely using in your collection. Try something like this: int locToRemove = MapLayer.GetPosition(p); DataLayer.Children.Remove(p);

Categories : C#
UIView class properties seemingly disappear when I call drawRect:
This is a nasty one! I think you have 2 instances of PlayingCardView: Your view connected to your IBOutlet in Interface Builder Your (same) view in IB where/because you have not set the class to PlayingCardView. So that drawRect call is actually happening on the PlayingCardView in your IB when it is loaded from IB and not on the "outlet" view where you are setting the rank and suit. I am gu

Categories : Objective C
astlib coordinates code to astropy coordinates code
This is one way to do it: In [1]: import numpy as np In [2]: from astropy import units as u In [3]: from astropy.coordinates import SkyCoord, FK4, FK5, Galactic In [4]: clra = np.zeros(3) In [5]: cldec = np.zeros(3) In [6]: c1 = SkyCoord(clra * u.deg, cldec * u.deg, frame=FK4) In [7]: c2 = c1.transform_to(FK5(equinox='J2000')) In [8]: c3 = c2.transform_to(Galactic) In [9]: print(c3.l.degr

Categories : Python
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