Alter visual animation effect

seraglio

Opcode 339. Not sure what this does even after some experiments. Anyone play with this? Also is there anything newer than IEDSP http://gibberlings3.net/iesdp/opcodes/index.htm ? They have quite a few unknowns and 20 or so that are missing at least. And those they are missing are obviously the newest most interesting codes.

argent77

There is a more up to date IESDP here: https://gibberlings3.github.io/iesdp/index.htm

seraglio

#339 (0x153) Alter Animation
Parameter #1: Value and Modifier
Parameter #2: Projectile Type
Special: Range
Description:
Modifies an area animation's Cycle and plays an area hit animation over it indexed by 'Projectile Type'.
'Value' is the high word of the first parameter, 'Modifier' is a bitfield manipulation operation. 'Range' defines the range of effect.
Known values for 'Modifier' are:
0 - Set 'Value' - ignores original
1 - And 'Value' - keeps bits
2 - Or 'Value' - sets bits
3 - Xor 'Value' - toggles bits
4 - And not 'Value' - turns off bits


This is still a little bit over my head.

What I'm hoping for is to create a toggleable spell that replaces whatever projectile a subsequently cast spell would normally use. Think of the wild surge that makes the wild mages spell effect all targets within 60', even if its normally single target, like stoneskin. That's what I'm hoping to build. Cant this effect do that? What does it do if not?

seraglio

Still messing with this to no avail. Maybe no one has ever attempted to use it?

My next guess as to its function is that its used on an existing spell...one that you might want to have multiple projectiles or different varieties. I could see some uses there..still could be accomplished other ways though.

kjeron

It doesn't do anything to projectiles. It alters which cycle of a BAM file is used. The projectile it uses is for display purposes only.

The Resource field indicates which BAM animation is to be affected.
The Value and Modifier change which Cycle of the BAM animation is played.

It's used in IWDEE to switch the endgame area's portal animation on/off.
Here's my understanding of how it works:
Each of the 4 corners of the portal use the same BAM, but different cycles: 0, 1, 2, & 3.(Closed)
The effect uses value=4, modifier=3(XoR).
0 XoR 4 = 4
1 XoR 4 = 5
2 XoR 4 = 6
3 XoR 4 = 7
Each of the 4 corners of the portal now use cycles 4, 5, 6, & 7 respectively.(Open)
The next effect again uses value=4, modifier=3(XoR).
4 XoR 4 = 0
5 XoR 4 = 1
6 XoR 4 = 2
7 XoR 4 = 3
Each of the 4 corners of the portal now use cycles 0, 1, 2, & 3 respectively.(Closed)

seraglio

Thanks so much for the explanation. That was driving me nuts!