使填充的形状在MATLAB中移动 [英] make filled shapes move in MATLAB

问题描述

对于在matlab中绘制填充的长方体和圆弧形状，我有以下声明. 我为这些语句添加的内容仅是为了使每个起点和目标点之间形成形状而不会发生碰撞.

I have the following statement for drawing filled rectangler and cirle shapes in matlab. What I have to add for those statement only to make shapes between start point and target point for each without collision.

fill([9.5 9.5 11.5 11.5 ],[12.6 14.6 14.6 12.6],'r');  %rectangler shape
hold on
r=1; 
color=[1 0 0]; 
t=linspace(0,2*pi);
fill(15+r*cos(t),8+r*sin(t),color); %circle shape
grid on

推荐答案

带有矩形的示例.诀窍是逐步修改对象属性，在本例中为'Vertices'

Example with a rectangle. The trick is to gradually modify the object properties, in this case its 'Vertices'

origin_x = [9.5 9.5 11.5 11.5 ]; %// initial coordinates of vertices
origin_y = [12.6 14.6 14.6 12.6];
destination_x = origin_x + 3; %// final coordinates of vertices
destination_y = origin_y + 2;
n_steps = 100; %// number of "frames"
t_pause = .03; %// seconds between frames

h = fill(origin_x, origin_y, 'r'); %// create object at initial position
axis([8 16 10 18]) %// adjust as needed, to cover the desired area
axis equal %// same scale in both axes
axis manual %// prevent axes from auto-scaling
for t = linspace(0,1,n_steps)
    x = (1-t)*origin_x + t*destination_x; %// update x
    y = (1-t)*origin_y + t*destination_y; %// update y
    set(h, 'Vertices', [x(:) y(:)]) %// change object's position
    pause(t_pause) %// a pause is needed to make movement slower
    drawnow %// probably not needed after pause. Just in case
end

带有矩形和圆形的示例.方法类似:创建两个对象并在for循环中更新它们的'Vertices'属性.

Example with a rectangle and a circle. The approach is similar: create both objects and update their 'Vertices' property within the for loop.

%// Define rectangle values
origin_x1 = [9.5 9.5 11.5 11.5 ];
origin_y1 = [12.6 14.6 14.6 12.6];
destination_x1 = origin_x1 + 3;
destination_y1 = origin_y1 + 2;

%// Define circle values
r = 1;
v = linspace(0,2*pi);
origin_x2 = 15+r*cos(v);
origin_y2 = 10+r*sin(v);
destination_x2 = origin_x2 - 1;
destination_y2 = origin_y2 + 3;

%// Define movement speed
n_steps = 100;
t_pause = .03;

%// Create objects
h1 = fill(origin_x1, origin_y1, 'r');
hold on
h2 = fill(origin_x2, origin_y2, 'b');

axis([8 16 10 18])
axis equal
axis manual

%// Update properties
for t = linspace(0,1,n_steps)
    x1 = (1-t)*origin_x1 + t*destination_x1;
    y1 = (1-t)*origin_y1 + t*destination_y1;
    set(h1, 'Vertices', [x1(:) y1(:)])

    x2 = (1-t)*origin_x2 + t*destination_x2;
    y2 = (1-t)*origin_y2 + t*destination_y2;
    set(h2, 'Vertices', [x2(:) y2(:)])

    pause(t_pause)
    drawnow
end

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