To get transformations from the Axes instance ax, you can use axis_to_data = ax.transAxes + ax.transData.inverted() points_data = axis_to_data.transform(points_axis) data_to_axis = axis_to_data.inverted() numpy.testing.assert_allclose(points_axis, data_to_axis.transform(points_data))
I finally managed to solve it! So to get acceleration vector in Earth’s coordinate system you need to: get rotation matrix (float[16] so it could be used later by android.opengl.Matrix class) from SensorManager.getRotationMatrix() (using SENSOR.TYPE_GRAVITY and SENSOR.TYPE_MAGNETIC_FIELD sensors values as parameters), use android.opengl.Matrix.invertM() on the rotation matrix to invert it (not transpose!), use Sensor.TYPE_LINEAR_ACCELERATION sensor … Read more
Calculate the distance of each point using Math.sqrt( Math.pow(x, 2) + Math.pow(y, 2) ); Take the result that’s the lowest var points = [ {x: 10, y: 20}, {x: 12, y: 18}, {x: 20, y: 30}, {x: 5, y: 40}, {x: 100, y: 2} ]; function d(point) { return Math.pow(point.x, 2) + Math.pow(point.y, 2); } … Read more
You need more information than just a single lat/lon pair to be able to do this. At this stage, the information you have provided is missing two things: how large an area does your image cover (in terms of lat/lon)? Based on what you’ve provided, I don’t know if the image shows an area a … Read more
A very simple example of a swing component to draw lines. It keeps internally a list with the lines that have been added with the method addLine. Each time a new line is added, repaint is invoked to inform the graphical subsytem that a new paint is required. The class also includes some example of … Read more
Using numpy, you can define the following: import numpy as np def cart2pol(x, y): rho = np.sqrt(x**2 + y**2) phi = np.arctan2(y, x) return(rho, phi) def pol2cart(rho, phi): x = rho * np.cos(phi) y = rho * np.sin(phi) return(x, y)
If you use a Camera (which you should) changing the coordinate system is pretty simple: camera= new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight()); camera.setToOrtho(true, Gdx.graphics.getWidth(), Gdx.graphics.getHeight()); If you use TextureRegions and/or a TextureAtlas, all you need to do in addition to that is call region.flip(false, true). The reasons we use y-up by default (which you can easily change as … Read more
This image presents both orientation(Landscape/Portrait) To get MaxX and MaxY, read on. For Android device screen coordinates, below concept will work. Display mdisp = getWindowManager().getDefaultDisplay(); Point mdispSize = new Point(); mdisp.getSize(mdispSize); int maxX = mdispSize.x; int maxY = mdispSize.y; EDIT:- ** **for devices supporting android api level older than 13. Can use below code. Display … Read more