How can I spawn bullets at a weapons barrel [SOLVED]

[Darton]

First time posting so apologies if I mess anything up.

Picture

picture.PNG (2.17 KiB) Viewed 2136 times

The highlighted green part is where the gun is attached to the player, it rotates around this point using:

Code: Select all

math.atan2(y2-y1,x2-x1)

This is all great however when I create a bullet I want to to be where the pink is. Now normally I would have x and y offset variables to do this for me but since the gun is rotating It will not work. Now I have tried to multiple the guns x and y with math.cos/sin with the guns angle but the I have not been able to get it to work. I have been stuck with this problem for a while and its probably due to my lack of understanding with basic trig; so any help or advice is appreciated

weapon.lua

(2.79 KiB) Downloaded 70 times

[knorke]

Welcome.

Now I have tried to multiple the guns x and y with math.cos/sin with the guns angle but the I have not been able to get it to work

That is the correct approach.
Should be something like:

Code: Select all

pink.x = green.x + cos(gunAngle) * gunLength
pink.y = green.y + sin(gunAngle) * gunLength

(depending how the coordinates system is set up etc)
It is easier when you attach the whole project so that we can actually run and test it.

[togFox]

Remember love uses radians by default - not degrees.

0 radians is "right" or "east" or 90 degrees or positive x axis or 3 o'clock! and it goes clockwise.

[Darton]

Welcome.

Now I have tried to multiple the guns x and y with math.cos/sin with the guns angle but the I have not been able to get it to work

That is the correct approach.
Should be something like:

Code: Select all

pink.x = green.x + cos(gunAngle) * gunLength
pink.y = green.y + sin(gunAngle) * gunLength

(depending how the coordinates system is set up etc)
It is easier when you attach the whole project so that we can actually run and test it.

Seems to have worked. Thanks

[Darton]

Remember love uses radians by default - not degrees.

0 radians is "right" or "east" or 90 degrees or positive x axis or 3 o'clock! and it goes clockwise.

Thanks good to know, thanks TogFox