coordinates

Basically, I need to get all the coordinates drawn from a Bezier curve implementation in OpenGL. Specifically, I need the coordinates to move a sphere object (baseball) in my scene along a curved trajectory path. This is what I use to draw my curve: GL2 gl = drawable.getGL().getGL2(); float ctrlpoints[][] = new float[][]{ {0.0f, 0.0f, 60f}, {0.0f, 3.0f, 45.0f}, {0.0f, 2.0f, 15.0f}, {0.0f, 1.0f, 0f}}; FloatBuffer ctrlpointBuf = FloatBuffer.allocate(ctrlpoints[0].length * ctrlpoints.length); for (int i = 0; i < ctrlpoints.length; i++) { for (int j = 0; j < 3; j++) { ctrlpointBuf.put(ctrlpoints[i

I want to get a simple solution to calculate the angle of a line (like a pointer of a clock). I have 2 points: cX, cY - the center of the line. eX, eY - the end of the line. The result is angle (0 <= a < 360). Which function is able to provide this value? Christian Mann You want the arctangent: dy = ey - cy dx = ex - cx theta = arctan(dy/dx) theta *= 180/pi // rads to degs Erm, note that the above is obviously not compiling Javascript code. You'll have to look through documentation for the arctangent function. Edit: Using Math.atan2(y,x) will handle all of the special cases and extra logic for

I'm wondering how to use a Matrix to get the new position of a coordinate within a rectangle after rotation. What I would like to do is: Define a rectangle Define a coordinate within that rectangle Rotate the rectangle Get the new position of the coordinate after the rotation The parts I can't figure out are 2 & 4. Any ideas? I have created a simple Demo for this. It has a little extra, so you can also see how to use this in Drawing. main.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/container" android

Problem Users can provide up to four latitude and longitude coordinates, in any order. They do so with Google Maps. Using Google's Polygon API (v3), the coordinates they select should highlight the selected area between the four coordinates. Question How do you sort an array of latitude and longitude coordinates in (counter-)clockwise order? Solutions and Searches StackOverflow Questions Drawing resizable (not intersecting) polygons How to sort points in a Google maps polygon so that lines do not cross? Sort Four Points in Clockwise Order Related Sites http://www.daftlogic.com/projects-google

I am using UIMapView to display locations on the iPhone. I want to do a directions from current location to the location of interest, I don't think its possible using MapKit (but if it is please inform) So I will open either the Google Maps application or safari to display it. Can i do this by specifying co-ordinates from (current location) to co-ordinates (the location of interest) I have these longitudes and latitudes. Or do i have to use street addresses? If I do have to use street addresses, can i get them from the latitude and longitude. iGo It is possible.Use MKMapView Get the location

I have this : and what i want exactly is that to show portion of Bitmap via coords (X,Y) of object with OnTouchListener(orange square with dot in center). So the problem is that i want to draw portion of image like it shows on image(Red square " Area that i want " to show). So in this case,excepted result is(portion of bitmap) : At current moment i'm doing like this: public boolean onTouch(View view, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_MOVE: Bitmap mBitmap = Bitmap.createBitmap(sourceBitmap,view.getX() - view.getWidth(),view.getY()-view.getHeight(),250,250

I've been trying to write a little application that recognizes custom events in Android: you hold your finger over a TextView for a certain length of time, and it changes color. I'm using the MotionEvent coordinates and checking if they are within the bounds of a particular TextView, which is within a table. private boolean checkBounds(TextView v, MotionEvent event) { int[] origin = new int[2]; v.getLocationOnScreen(origin); if ((event.getX() > origin[0]) && (event.getX() < (origin[0] + v.getMeasuredWidth()))) { if ((event.getY() > origin[1]) && (event.getY() < (origin[1] + v.getMeasuredHeight

I want to have certain code such that given the latitude and longitude as input, I want to get the continent which it belongs to? I know I can manually read the coordinates and then see that from the map. But is there an easier way to do it? I've done this code just for getting the continent. It is not 100% exact, but pretty good for most territories. I did this to identify continents as asked by PVsyst, so I differenciate between Australia and Pacific, but this can be easily changed: If you do not want to differenciate between Australia and Pacific, just remove the Australian part (LatAus