www.gusucode.com > graphics 案例源码程序 matlab代码 > graphics/CreateAnimationExample.m
%% Animate Graphics Object % This example shows how to animate a triangle looping around the inside of % a circle by updating the data properties of the triangle. %% % Plot the circle and set the axis limits so that the data units are % the same in both directions. % Copyright 2015 The MathWorks, Inc. theta = linspace(-pi,pi); xc = cos(theta); yc = -sin(theta); plot(xc,yc); axis equal %% % Use the |area| function to draw a flat triangle. Then, change the value % of one of the triangle vertices using the (x,y) coordinates of the % circle. Change the value in a loop to create an animation. Use a % <docid:matlab_ref.f56-719157> or |drawnow limitrate| command to display % the updates after each iteration. |drawnow limitrate| is fastest, but it % might not draw every frame on the screen. xt = [-1 0 1 -1]; yt = [0 0 0 0]; hold on t = area(xt,yt); % initial flat triangle hold off for j = 1:length(theta)-10 xt(2) = xc(j); % determine new vertex value yt(2) = yc(j); t.XData = xt; % update data properties t.YData = yt; drawnow limitrate % display updates end %% % The animation shows the triangle looping around the inside of the circle.