coordinate-transformation

If I have a point (x, y z), how do I find the linear index, i for that point? My numbering scheme would be (0,0,0) is 0, (1, 0, 0) is 1, . . ., (0, 1, 0) is the max-x-dimension, .... Also, if I have a linear coordinate, i, how do I find (x, y, z)? I can't seem to find this on google, all the results are filled with other irrelevant stuff. Thank you! Kevin There are a few ways to map a 3d coordinate to a single number. Here's one way. some function f(x,y,z) gives the linear index of coordinate(x,y,z). It has some constants a,b,c,d which we want to derive so we can write a useful conversion

i want to scale the below element in fixed position. <path id="container_svg_rectsymbol1" fill="red" stroke-width="1" stroke="Gray" d="M 73.1111111111111 -71.75 L 83.1111111111111 -71.75 L 83.1111111111111 -61.75 L 73.1111111111111 -61.75 L 73.1111111111111 -71.75" transform="scale(1)"/> when am start scaling it moves from one location to another location. i don't want to move the object i just want to enlarge the size of object. i have referred following link. http://commons.oreilly.com/wiki/index.php/SVG_Essentials/Transforming_the_Coordinate_System how to do fixed scaling ? i want to

I'm currently working on my own 2D Maths library for my project to improve my understanding of the underlying matrix math. In the past I've use libraries such as GLM but I felt like it might be worth looking into as a learning experience. Most of this has been straightforward and the majority of my Maths classes integrate and work well with OpenGL, however my view matrix appears to be stretching my quad at the edges of the window. Note this isn't an issue of perspective, not only am I using an Orthographic Matrix but I've separated this from the MVP, using the view matrix in the place of the

If i have a point (x,y,z) how to project it on to a sphere(x0,y0,z0,radius) (on its surface). My input will be the coordinates of point and sphere. The output should be the coordinates of the projected point on sphere. Just convert from cartesian to spherical coordinates? Stephen Canon For the simplest projection (along the line connecting the point to the center of the sphere): Write the point in a coordinate system centered at the center of the sphere (x0,y0,z0): P = (x',y',z') = (x - x0, y - y0, z - z0) Compute the length of this vector: |P| = sqrt(x'^2 + y'^2 + z'^2) Scale the vector so

I am using LG Optimus 2x smartphone(Gyroscope and Accelerometer sensor) for positioning. I want to get correct rotation angles from gyroscope that can be used later on for body to earth coordinate transformation. My question is that How I can measure and remove the drift in gyro sensor. The one way is to take the average of gyro samples (when mobile is in static condition) for some time and subtracting from current sample, which is not good way. When the mobile is in rotation/motion how to get the drift free angles? As far as I know, either the Kalman filter or something similar is implemented

I'm trying to write a basic python script that will track a given satellite, defined with tle's, from a given location. I'm not a asto/orbital person but am trying to become smarter on it. I am running into a problem when I try to convert the azimuth, elevation, range values to a ECEF position. I'm using PyEphem to get the observation values and spg4 to get the real location to verify. I'm also using the website, http://www.n2yo.com/?s=25544 , the verify the values. I'm getting the observed azimuth, elevation and range with: def get_ob(epoch, sv, obsLoc): site = ephem.Observer() site.lon = str