作者nadfed (me)
看板MATLAB
標題[問題] 如何正確製作動畫
時間Tue May 6 07:29:30 2014
如果標題下的不好請多包涵 OrZ
大家好~小弟剛開始學用Movie 寫了一點code有一些問題如下:
1.在圖中要畫兩台車，若用rectangle畫車，程式可以跑但是車子移動過程
其中一台會有殘影。請問如何可以消掉殘影呢?
2.如果直接讀取車子的圖片則有一台無法顯示，好像跟讀取順序有關。
要怎麼做才能使兩台車同時顯現呢?
3.動畫好像會重複跑兩次，而且第二次的座標完全跑掉了。要怎麼做才能只跑一次?
4.應該如何正確uistack呢?我一直出現'Invalid or deleted object.' 錯誤
問題有點多，還請版上高手解惑~謝謝
以下附上程式碼:
% Car Information
l = 4.91; % vehicle length (Hyundai grandeur specs) [m]
l_r = 3; % length rear end - cg [m]
l_f = l-l_r; % length front end - cg [m]
w = 1.86; % width of vehicle (Hyundai grandeur specs) [m]
car_size=[l_r l_f w/2 w/2]; % car size array
v1 = 60*1000/3600; % constant speed of car1 = 60 km/h
v2 = 65*1000/3600; % constant speed of car2 = 80 km/h
% Road Information
% 1000m in total distance
rl = 1000; % road length
rw = 10; % road width
% Trajectory Information
% [x,y,phi] (left lower corner of the car box)
x1 = [0:v1:rl]';
y1 = 2.5-0.5*w*ones(length(x1),1);
x2 = [0:v2:rl]';
y2 = 7.5-0.5*w*ones(length(x2),1);
phi1 = zeros(length(x1),1);
phi2 = zeros(length(x2),1);
traj1 = [x1,y1,phi1];
traj2 = [x2,y2,phi2];
leng_traj2 = length(traj2);
% Drawing picture
frame = 100;
for i=1:leng_traj2
% read a car
uniquebgcolor = [0 0 0]; % background color
car1 = imread('car.png','BackgroundColor',uniquebgcolor);
car2 = imread('car2.png','BackgroundColor',uniquebgcolor);
% car rotation with yaw angle
car1 = imrotate(car1,traj1(i,3),'bilinear','loose');
car2 = imrotate(car2,traj2(i,3),'bilinear','loose');
% mask1 = bsxfun(@eq,car1,reshape(uniquebgcolor,1,1,3));
% mask2 = bsxfun(@eq,car2,reshape(uniquebgcolor,1,1,3));
% display image
% rec1=rectangle('position',[traj1(i,1) traj1(i,2) l w],'FaceColor','r');
% rec2=rectangle('position',[traj2(i,1) traj2(i,2) l w],'FaceColor','b');
% set(rec1,'erasemode','non');
% set(rec2,'erasemode','non');
car1_im = image(car1,'Xdata',[traj1(i,1),traj1(i,1)+l],...
'Ydata',[traj1(i,2),traj1(i,2)+w]);
car2_im = image(car2,'Xdata',[traj2(i,1),traj2(i,1)+l],...
'Ydata',[traj2(i,2),traj2(i,2)+w]);
% drawing road image
line([0,rl],[0,0],'LineWidth',2,'Color','k');
line([0,rl],[rw,rw],'LineWidth',2,'Color','k');
line([0,rl],[rw/2,rw/2],'LineWidth',2,'Color','y');
% moving axes
axis xy % cartesian convention
axis([traj1(i,1)-5 traj1(i,1)+50 traj1(i,2)-10 traj1(i,2)+10]);
% keep car image on the top
uistack(car1_im,'top');
uistack(car2_im,'top');
% recording each movie frame
M(i) = getframe(gcf); % get current frame
end
movie(M)
--
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