Code covered by the BSD License  

Highlights from
fast bresenham

Be the first to rate this file! 9 Downloads (last 30 days) File Size: 21.2 KB File ID: #13221

fast bresenham

by

 

04 Dec 2006 (Updated )

implement bresenham algo using C mex file for higher speed

| Watch this File

File Information
Description

Two functions, LineTwoPnts and SegInmat, are provided.

LineTwoPnts lines two arbitray points.
for example:
------------
[rr, cc] = LineTwoPnts(-2,-3, 2,4);
disp('The line between (-2,-3) and (2,4): ');
disp('row: ');disp(rr);
disp('col: ');disp(cc);

The line between (-2,-3) and (2,4):
row:
    -2 -1 -1 0 0 1 1 2

col:
    -3 -2 -1 0 1 2 3 4

SegInMat returns value of a segment within a matrix
for example:
------------
mat = reshape(1:18, 3, 6);
elems = SegInMat(mat, 1,1, 3,5);
disp('mat:'); disp(mat);
disp('the values of line (1,1) and (3,5) within mat: ');
disp(elems);

mat:
     1 4 7 10 13 16
     2 5 8 11 14 17
     3 6 9 12 15 18

the values of line (1,1) and (3,5) within mat:
     1 5 8 12 15

Using C mex file for higher speed.

Have fun:)

MATLAB release MATLAB 7.2 (R2006a)
Tags for This File   Please login to tag files.
Please login to add a comment or rating.
Updates
15 Dec 2006

a bug is fixed. previous version will crash wehn |rs-re|==|cs-ce|

Contact us