line from 2d vector and angle
Author
hello ive got a 2d point lets say 250,100
and a direction in degree lets say 15°
how cann i construct a line from this
thx, a lot
Your question is?!:
define a line through given point with given direction.
one solution in vector-parameter-notation:
y =( Pxcoord ) + t*( cos(angle) )
( Pycoord ) ( sin(angle) )
hope that clarifies
/Mankind gave birth to God.
define a line through given point with given direction.
one solution in vector-parameter-notation:
y =( Pxcoord ) + t*( cos(angle) )
( Pycoord ) ( sin(angle) )
hope that clarifies
/Mankind gave birth to God.
that was me!
Your question is?!:
define a line through given point with given direction.
one solution in vector-parameter-notation:
Yx = Pxcoord + t*cos(angle)
Yy = Pycoord + t*sin(angle)
hope that clarifies
/Mankind gave birth to God.
Edited by - silvren on October 16, 2001 12:54:54 PM
Your question is?!:
define a line through given point with given direction.
one solution in vector-parameter-notation:
Yx = Pxcoord + t*cos(angle)
Yy = Pycoord + t*sin(angle)
hope that clarifies
/Mankind gave birth to God.
Edited by - silvren on October 16, 2001 12:54:54 PM
first version:
y=k+m*x; m=atan(angle)
k is y offset , m is the angular coeff.
second version
x=x0+t*cos(angle)
y=y0+t*sin(angle)
thus , (l,m)=(cos(angle),sin(angle)); (-m,l) is an orthogonal vector , always usefull
third version
x=y/p+q where p=1/m ,q=k/m segmentary equation
i hope it helps , translate in to c .
y=k+m*x; m=atan(angle)
k is y offset , m is the angular coeff.
second version
x=x0+t*cos(angle)
y=y0+t*sin(angle)
thus , (l,m)=(cos(angle),sin(angle)); (-m,l) is an orthogonal vector , always usefull
third version
x=y/p+q where p=1/m ,q=k/m segmentary equation
i hope it helps , translate in to c .
I think v71''s first version is "wrong" at one point:
atan(angle) was certainly meant to be tan(dy/dx) or something like that.
Anyway, it (1st version) cannot handle vertical lines, coz dy/dx wouldn''t exist!
/Mankind gave birth to God.
atan(angle) was certainly meant to be tan(dy/dx) or something like that.
Anyway, it (1st version) cannot handle vertical lines, coz dy/dx wouldn''t exist!
/Mankind gave birth to God.
Yes, of course!
You were both right.
don''t know where I got that from.
But it cannot, still, handle vertical lines
...I think.
thanks
/Mankind gave birth to God.
You were both right.
don''t know where I got that from.
But it cannot, still, handle vertical lines
...I think.thanks
/Mankind gave birth to God.
This topic is closed to new replies.
Advertisement
Popular Topics
Advertisement
