openscad/BOSL2
1
0
Fork 0
mirror of https://github.com/revarbat/BOSL2.git synced 2025-01-16 13:50:23 +01:00
Code Issues Projects Releases Wiki Activity

Fixed crazy FP rounding error in vector3d_angle()

Browse Source
This commit is contained in:
Revar Desmera 2018-10-09 15:34:26 -07:00
parent b6a922295b
commit 924a35188c
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
math.scad
View File

@ -207,7 +207,8 @@ function normalize(v) = v/norm(v);
function vector2d_angle(v1,v2) = atan2(v1[1],v1[0]) - atan2(v2[1],v2[0]);
// Returns angle in degrees between two 3D vectors.
function vector3d_angle(v1,v2) = acos((v1*v2)/(norm(v1)*norm(v2)));
// NOTE: min and max are to correct for crazy FP rounding errors that exceed acos()'s domain.
function vector3d_angle(v1,v2) = acos(max(-1,min(1,(v1*v2)/(norm(v1)*norm(v2)))));
// Returns a slice of an array. An index of 0 is the array start, -1 is array end
function slice(arr,st,end) = let(