function to discretize a line between two points
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following are the two questions I have to do.
I did the first one and it does not look right. following is the code
function [points] = discretizeLine(p1, p2, stepsize)
dt = stepsize;
theta = atan2(p2(1,2)-p1(1,2),p2(1,1)-p1(1,1));
i_comp = dt * cos(theta);
j_comp = dt * sin(theta);
i=0;
while(1)
points(i+1,1) = p1(1,1) + i_comp * i;
points(i+1,2) = p1(1,2) + j_comp * i;
i = i+1;
if((abs(p1(1,1) + i_comp * i-p2(1,1)) < abs(i_comp))||(abs(p1(1,2)+j_comp*i-p2(1,2))<abs(j_comp)))
break;
end
end
end
please help me with these two questions thanks!
0 Comments
Answers (1)
Victor Parry
on 18 Nov 2019
just took me a few hours to answer this 5 yo question, but at least it works now.
function [points] = discretizeLine(p1, p2, stepsize)
dt = stepsize;
theta = atan2(p2(1,2)-p1(1,2),p2(1,1)-p1(1,1));
i_comp = dt * cos(theta);
j_comp = dt * sin(theta);
deltadist = [i_comp,j_comp];
i=0;
while(1)
points(i+1,1) = p1(1,1) + i_comp * i;
points(i+1,2) = p1(1,2) + j_comp * i;
i = i+1;
if(abs(p1+i*deltadist-p2)<=abs(deltadist)) %((abs(p1(1,1) + i_comp * i-p2(1,1)) < abs(i_comp))||(abs(p1(1,2)+j_comp*i-p2(1,2))<abs(j_comp)))
break;
end
end
end
2 Comments
Russell Niven
on 27 Jul 2022
This is great! However, it breaks when you have a perfectly horizontal line, assuming since arctan(90)= undefined)
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