Aligning weapon-graphics on ship

[Absu]

The way I'm aligning my gun-texture on a ship is simply type in the coordinates I get from Photoshop when opening the ship-base image. However then it's always a little off by some pixels which I simply count and add to the ship XML-file. I was hoping I could make this work slightly more effective but I must be missing something.

Take the texture for the missile for example:

Code: Select all

<weaponAnim name="missiles_1">
	<sheet>missiles_1</sheet>
	<desc length="3" x="0" y="0"/>
	<chargedFrame>0</chargedFrame>
	<fireFrame>1</fireFrame>
	<firePoint  x="15" y="20"/>
	<mountPoint x="7" y="30"/>
	<chargeImage>weapons/missiles_1_glow.png</chargeImage>
</weaponAnim>

Going through the attributes I think I've identified them all: "desc length" is the number of frames for the gun-texture when it animates. "chargedFrame" is the frame when the weapon slides up or down, "fireFrame" is when it fires. "firePoint" I'm guessing is from where the projectile goes. Then "mountPoint" appears to be an offset on the texture.

However when I use Photoshop to try and align the images there seem to be some 20 pixels that aren't accounted for on the x-axis and just 2-3 pixels on the y-axis. The way I "align" them is simply to divide the image by the number in "desc length"-attribute, then flip it 90 degree. It's also then the same width and height as the "fh" and "fw"-attributes in the "animSheet"-tag.

Anyone noticed a similar problem or know if there are some other offset-attributes? Some things I've got suspicions with are the rotating of the image with 90 degrees, that it might not rotate over the center or something. There are some x- and y-coordinates in the img-tagg in the ship's XML-file too but changing those doesn't appear to do anything, except settings them to 0 crashes the game...