Print

[Ben]

Ben

[Request / Listing] Drawing line based on angle ...

Taking the starting position of this as 0,0 (for ease, and the fact that you can just add anything on to it anyway), how would I draw a line of angle theta and length l?

It's been annoying me because sin and cos only range from 0 to 90, not 360.
Help please.

Want a place to upload your sprites and games for FREE? Look no further than GameDevotion

[Infinitus]

Infinitus

Re: Drawing a line based on an angle less than 3...

Basic pusedo code for drawing a line along a Angle / Length.

Code: [Select]

X2 = X + (Sin(Angle) * Length)
Y2 = Y + ((-Cos(Angle)) * Length)
DrawLine(X,Y,X2,Y2)

Im not sure what you mean by sin/cos being only from 0-90, but it may be because C++ using another measurment for Angles, ill have a look 1 sec.

[Ben]

Ben

Re: Drawing a line based on an angle less than 3...

What I mean is that sine ranges from -1 to 1, and the arcsine of those is 90, the maximum, and of course the lowest is 0 (asin(0))

Want a place to upload your sprites and games for FREE? Look no further than GameDevotion

[aab]

aab

Re: Drawing a line based on an angle less than 3...

radians?
the range of asin is -Pi/2 to Pi/2 and inverse sin doesnt mathematically exist beyond those values, its all fine. acos is 0 to Pi as this is similarly the closed interval under which inverse cosine is mathematically a function.

I ♥ Sol
.... I ♥ Sol ? wtf how long has that been there? >_> *rrrrrrrrar*

•