Hi,

Im using this to calculate angle between two vectors f@angle = degrees( acos (dot(normalize(@dir), normalize(@c)) )); But this gives me just positive values. my @c is {1,0,0} if @dir is {0.5, -0.5,0} I want that it returns a negative angle and {0.5, 0.5,0} would return a positive value. How to do this?

Thx
Mika

Hi,

you can use plane for example defined by an up vector ((0,1,0) or something) and @c (plane noraml ~ normalized cross product of

both). This plane can be used to detect, if the @dir vector is on the positive/negative side (using the dot product of @dir and the

plane normal). The result depends on the plane itself, if you invert the normal for example the positive angles will become negative

and vice versa.

Aizatulin
Hi,

you can use plane for example defined by an up vector ((0,1,0) or something) and @c (plane noraml ~ normalized cross product of

both). This plane can be used to detect, if the @dir vector is on the positive/negative side (using the dot product of @dir and the

plane normal). The result depends on the plane itself, if you invert the normal for example the positive angles will become negative

and vice versa.

This worked! Thanks!