MATLAB Examples

Contents

%DEMOPOLYNOMIALCURVEPROJECTION  One-line description here, please.
%   output = demoPolynomialCurveProjection(input)
%
%   Example
%   demoPolynomialCurveProjection
%
%   See also
%

% ------
% Author: David Legland
% e-mail: david.legland@nantes.inra.fr
% Created: 2007-12-21,    using Matlab 7.4.0.287 (R2007a)
% Copyright 2007 INRA - BIA PV Nantes - MIAJ Jouy-en-Josas.

Initializations

% parametrization basis
t = linspace(-10, 10, 1000)';

% coefficients of polynomial curve
xc = [0 12 0 -1/5];
yc = [0 0 1];

% curve for display
curve = polynomialCurvePoint(t, xc, yc);

% draw the curve
figure(1); clf; hold on;
drawPolyline(curve);
axis equal;

Compute projection point

% the point to project
point = [0 40];

% position of projection on the curve
pos = polynomialCurveProjection(t, xc, yc, point);

% coordinate of projection point
proj = polynomialCurvePoint(pos, xc, yc);

% draw the point and its projection
drawPoint(point, 'bo');
drawPoint(proj, 'ro');
drawEdge([point proj], 'k');