Moving at angles

[drewski]

I need to know how to move my sprite along a path at a certain angle. Can anybody help me with this?

[Zaei]

This is pretty easy. Take the angle, and convert it into a unit vector:

Type Vector
   x as Single
   y as Single
End Type

...

Dim dir as Vector
dir.x = cos(angle)
dir.y = sin(angle)

Remember that angle must be in radians. If it is in degrees, you have to convert. just use the following:

radians = angle * (3.14159 / 180)

... and use radians in place of the angle variable above.

Now, when you want to move, you need to know the speed you want to move your sprite at. Then, use this:

sprite.x = sprite.x + sprite.speed * dir.x
sprite.y = sprite.y + sprite.speed * dir.y

Z.

[drewski]

Thanks man. That's exactly what I wanted. I'm going to try that out right now.

[SapphireGreen]

Yeah. It's common practice to do them as constants.

Const PI = 3.14159
Const RAD = PI / 180
Const DEG = 180 / PI


Pi, radians, degrees. There you are!