How to create a plot3 on a truncated pyramid ?
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Dear all: I want to crat a line plot to produce a truncated pyramid with 45degree inclination. The truncated pyramid has an initial width and length of 50mm,50mm. Hight of 30mm. I want to crat plot3 lines within 0.25mm depth until the final hight is reached(30mm). So how to crat the plot for this truncated pyramid. The sample part is attached. Thank You!
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L = 50 ; B = 50 ; H = -30 ;
theta = 45 ;
% Bottom rectangle
B = [0 0 0; L 0 0; L B 0; 0 B 0; 0 0 0] ;
mx = mean(B(1:4,1)) ; my = mean(B(1:4,2)) ;
h = 0:-0.25:H ;
figure
hold on
plot3(B(:,1),B(:,2),B(:,3),'r')
for i = 1:length(h)
C = [mx my h(i)] ;
x = h(i)/tand(theta) ;
s = L/2-x ;
% Top rectangele points
T = [mx-s my-s h(i); mx+s my-s h(i) ; mx+s my+s h(i) ; mx-s my+s h(i) ; mx-s my-s h(i)] ;
plot3(T(:,1),T(:,2),T(:,3),'b')
end
2 个评论
Saurabh Thakur
2022-3-7
Hi, I want to create similar truncated pyramid. With initial dimensions of 70 X 70 mm. A depth of 25 mm is to be reached and stepsize is 1mm. But the path traced should have equally spaced points at 1mm distance. Can it be done?
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