I do have one column vector:
And the matrix of (let's say) 5 vectors:
-0.8903 -0.6071 -0.7037 0.4638 0.7759
0.3896 0.5431 -0.1126 -0.2208 -0.4987
0.2358 -0.5801 0.7015 -0.8580 0.3863
I need to calculate angles between vector st_direction and each column vector from A matrix, for example:
- angle between vector [0.6320 0.7308 0.2579] and vector [-0.8903, 0.3896, 0.2358].
Currently I'm trying to calculate it like that:
acos((dot(A(:,i),st_direction))/(norm(A(:,i))*norm(st_direction)))
But I think that something is wrong, because in later stages of a code I must check whether this angle is less than given variable:
acos((dot(A(:,i),st_direction))/(norm(A(:,i))*norm(st_direction)))<=deg2rad(fov_st)
I think that something is wrong because the program spits many point that when plotted on a graph are very far away. Is there any mistake?
Below there is an example for a greater amount of column vectors in matrix A (1000, generated as units vectors ) so it's easier to see. Red points are the points that satisfy the equation and the cyan line is the st_direction vector. As you can see, those points seem to be very randomly distributed.
