triangulation

  1. Y

    Triangulation patterns in .ifc file format using coordinates and indexes

    Hello, I have an .ifc format which is a CAD format, and it describes a wall in the xy plane by a set of coordinates and their corresponding indexes according to the link explanation: Explanation I am attaching a .txt where the data is divided into the coordinates in xyz space, then indexes and...
  2. R

    Delaunay triangulation

    I need help in constructing Delaunay triangulation with 3n-6 edges in MATLAB. Pls, help me it's urgent
  3. T

    Triangulation issue

    Hello, Could any one help me with following question; From Vx =K/R2 where Vx isthe Voltage at sensor x, R is the separation & K is a constant. I get to R1 = x2+ y2 aR1 = (R –x)2 + y2 bR1 = x2+ (R – y)2 Where a = V1/ V2 and b = V1 / V3 I’d like to find x, y and R1 in...
  4. M

    Locate Cellphone Using Triangulation

    Hi Everyone... For a homework problem I need to locate a cell phone using triangulation. Three cell towers form an equilateral triangle with 4.1 mile sides. The transmitting cell phone is somewhere inside the the triangle formed by the towers. The transmit power of the phone is unknown. The...
  5. V

    triangulation method

    Hii..... (Hi) I'm stuck up with a triangulation method. I have to find the location coordinates of an acoustic source with the help of three sensors separated by 2 metres (between 1st - 2nd and 1st - 3rd) configured in L shape. I have the time delay estimates of the signals received at the...
  6. S

    Question about the triangulation of surfaces

    For the following simplicial triple system K, T1=max(K)={125,126,134,137,146,157,234,235,247,267,356,367,456,457} decide whether the following properties is true or not. Justify your answer (a) T1 is the triangulation of a surface (b) T1 is a regular triangulation (c) T1 is the...
  7. F

    Matlab - Add/Remove edges in delaunay triangulation

    I want to do the following: 1. Construct Delaunay Triangulation dt I used the following code for basic triangulation x = rand(10,1); y = rand(10,1); dt = DelaunayTri(x,y) triplot(dt); 2. Remove edges from specific nodes in dt if node degree > D (By node degree, I mean the number number of...
  8. V

    Triangulation - Insufficient information?

    Is there enough information to answer the following question: Two hikers are in the field out of each other's sight. They each have a cell phone and a compass. They want to meet together someplace along the straight line that connects their current positions. They call each other and agree on...
  9. T

    triangulation

    Find the number of distinct triangulations of the following polygons: a) Polygon P contain n+3 vertices V0=(0,0) V1=(1,0) ...Vn=(n,0) Vn+1=(1,1) and Vn+2=(0,1) labeled in the counter-clockwise order. b) a) Polygon P contain n+4 vertices V0=(0,0) V1=(1,0) ...Vn=(n,0) Vn+1=(2,1) and Vn+2=(1,1)...
  10. T

    Triangulation

    Find the number of distinct triangulations of the following polygons: a) Polygon P contain n+3 vertices V0=(0,0) V1=(1,0) ...Vn=(n,0) Vn+1=(1,1) and Vn+2=(0,1) labeled in the counter-clockwise order. b) a) Polygon P contain n+4 vertices V0=(0,0) V1=(1,0) ...Vn=(n,0) Vn+1=(2,1) and Vn+2=(1,1)...
  11. M

    [SOLVED] Triangulation help needed

    I need to calculated the height at intermediate grid co-ordinates where I have 3 sets of enclosing co-ordinates and heights. Formula or UDF solutions welcome! I've posted this also at my usual forum VBAEXPRESS.COM, but I think I need a bit more Maths help, rather than coding.
  12. P

    the graph of any triangulation will have at least two vertices of degree 2?

    I am having trouble figuring out this problem for my homework and understanding why this is true: Prove by induction that the graph of any triangulation of a polygon will have at least two vertices of degree 2. Please help me ASAP, thanks.
  13. J

    Triangulation of a Torus

    I need help doing a triangulation of a torus. I don't need to use any formulas or anything, as we have just started doing this kind of thing. What I have to do is do the triangulation and then compute V-E+F and see if it equals 2. My professor said a couple ways we can do this is use a square...
  14. B

    Triangulation on the sphere!!

    Hi, I am trying to perform some triangulation on a sphere. I have 3 distinct points of which I know the lat/long positions. From my position I can measure the angles between between the 3 points as I see them. Using the cosine rule I came up with three equations to find the three unknown...
  15. M

    Create sphere triangulation

    Hello, I want to create a sphere triangulation with given some input data like double radius, int stacks, int slices, double phiStart, double phiSweep, double thetaStart and double thetaSweep. How can we create indices and vertices for sphere with the given data so that can further be used to...
  16. P

    [SOLVED] Triangulation

    S1 is located at (100,200). It's distance to the epicenter is 100 √ 10 miles S2 is located at (400,500). It's distance to the epicenter is 200 miles S3 is located at (700,100). It's distance to the epicenter is 100 √ 13 miles 1)What is the radius of S1? S2? S3? 2)State the equations, in...
  17. M

    Triangulation of points on a globe

    First off, let me apologize if this is in the wrong forum. It's been a while since I've done any form of advanced math and I can't seem to pull up the right forumla here... I'm trying to calculate a total of four points on the surface of the planet. Here are the knowns: Latitude Point A...
  18. J

    A triangulation help area needed! ASAP

    hi thanks for looking at this. i have a triangle with angles ABC A=57 deegrees B=45 deegrees C= not given and one length between AB of 14metres I need to calculate the area within the triangle? can someone work it out and show me how? thanks james
  19. S

    Triangulation / Approximation

    Hi, Introduction I'm working on electronics test system, where a certain measurement take an awfully long time. Basically its find a balance point of a circuit and checks the point is within the test limits. The circuit is a bridge which has an unknown impedance attached, then changing know...
  20. T

    triangulation of a surface

    2 manifolds Anybody have any interesting problems/info on 2-manifolds? Namely regarding their triangulation? :)