[Math] how do u make sinoid

[Blightsower]

Hi, i just want to ask on how u make ur projectiles move on a sinoid pattern. Sinoid like the sine graph.

 

[Squiggy]

http://www.hiveworkshop.com/forums/...an-we-have-compilation-math-functions-158933/

 

[Zwiebelchen]

Every 0.03 seconds, do the following:

You increment a real counter that keeps track of how much time has passed:
elapsed = elapsed + 0.03

You calculate a dX and dY offset for a simple linear movement:
dX = Cos(angle) * VELOCITY
dY = Sin(angle) * VELOCITY

You calculate the projected coordinates of the unit:
newX = UnitX+dX
newY = UnitY+dY

Then you determine the orthogonal offset value:
offsetX = Cos(angle-pi/2) *AMPLITUDE * Sin(elapsed/PERIOD*2*pi)
offsetY = Sin(angle-pi/2) * AMPLITUDE * Sin(elapsed/PERIOD*2*pi)

Then, in the final step, you just move your unit:
SetUnitPosition(unit, newX+offsetX, newY+offsetY)

VELOCITY is the linear travel speed in coordinate units / 0.03 seconds.
PERIOD is the time in seconds for the projectile to move from the left return point to the right and back again.
AMPLITUDE is the maximum orthogonal distance of the projectile from a straight linear travel.
ANGLE is the movement angle of your projectile. Remember that all trigonometric functions in Warcraft 3 use Radian input, not degrees.

 

[Blightsower]

Omg! Thank you swiebelchen!