Rotating Pictures

 In Half-Life single-player you see a poster and after few minutes/seconds it flips into three sections showing another picture; I was wondering how is that done? And entity; or a sprite?

lots of func_rotating brushes aligned next to each other, each side has a piece of a picture textured to it so that when theyved rotated 90 degree's it forms the full image.

look up any tut on "func_rotating_door" and you can use it..

first i would apply the texture and then use the clip tool to make seperate peices

I asked ralph this same question and saw it for myself. Basically its 4 different func_rotatings, rotating at different angles, at different times, and stopping for a few seconds before rotating again.

Correct me if I'm wrong, but I didn't think func_rotating's could stop rotating. I would probably resort to either func_door_rotatings or some weird func_train thing that rotates the trains between path_corners.

If you really want to know, I believe there's the source (.rmf) to c1a0 or something in the HL SDK 2.2 Full, and you can see for yourself. Along with a spinkee env_beam demonstration map.

It must be some func_door_rotatings, or similar entities such as func_platrots (which are rotating, rising platforms).

A func_door_rotating is a rotating entity that rotates back and forth between two positions.  You can set the degree and direction of rotation.  A func_platrot could be used for the same effect, but there is no need here.

Note that it would be much more difficult to create a rotating billboard that displayed more than two different adverts.  This is because a func_door_rotating can only have two positions.  You could create the illusion of more adverts by using a sequence of env_renders to swap several billboards, which appear to be only one billboard.  If you would like to know how this is done, let me know  :smile:

A func_rotating cannot be stopped in a particular position (it can be stopped by triggering, but where it ends up will depend on when it is triggered.  This is imprecise for positioning).

From my considerable and frustrating experience with rotating func_trains and tracktrains, I suggest that neither of these entities would work.

The source file to that particular map is not included in the SDK.

I've seen this map file. It was done with func_door_rotating entities controlled by multi_managers and started by a trigger_auto.

Gollum said:
The source file to that particular map is not included in the SDK.

I could have sworn it was! Argh.

There's a lot of similar maps in that section of the game - c1a0, c1a0a, c1a0b etc.  The very first one (c1a0) is included, but I don't believe it contains this effect.

Use the map decompiler then, it's usefull for seeing entity arrangements.

KoRnFlakes said:
lots of func_rotating ...

PLEASE! you're a mapper! is "func_door_rotating"!

Func_rotatings are different than func_door_rotatings. I'm sure he meant what he said.