Help needed re Shader coordinates?

My shader currently uses 'offSetX and offSetY to alter the vec2(tex) coordinates.

(see below)

This works fine for one direction, but when I add all the other directions into

it, I end up with another 30 or so lines.

So my question is..how do add an 'Angle' parameter into the equation?

Changing the calculations to something like -

vec2(tex.x-(pixelWidth*(offsetX*1.0)*cos(angle)),tex.y-(pixelHeight*(offSetY*1.0))*sin(angle)))*0.20000;

would simplify things, but after 2 weeks of trawling the Internet for a solution,

I have come no closer to solving the problem.

Cheers.

I'm not super clear about what you're doing but here's the formula to

https://www.siggraph.org/education/mate ... 2drota.htm

then you could do this to rotate the offsets by the angle:

vec2(tex.x+ cos(radians(angle))*offsetX - sin(radians(angle))*offsetY, tex.y + sin(radians(angle))*offsetX + cos(radians(angle))*offsetY)

Thanks ROJOhound (worked on first test!)

R0J0hound

'I'm not super clear about what you're doing but here's the formula'

(motion blur effect)