[fixed] Spiker and Dispenser will work with away-facing Platforms at their exit

[mugg91]

Status

• IN DEVELOPMENT
• Spiker will not work correctly as it shoots spike through any solid blobs.

Description

[fixed] Spiker will work when Platform is at its exit but only if it is not facing towards Spiker
[fixed] Dispenser will work when Platform is at its exit but only if it is not facing towards Dispenser
[changed] If Dispenser can't pop out items, don't make a Particle
[added] Dispenser will have a different sound effect if its exit was blocked

Fixes #1979

Previously, Spiker and Dispenser would not work if a Platform was placed at their exit. Since it looked odd that they wouldn't work even with away-facing platforms, I made this PR to make changes.

The CollidesWithPlatform() code from #1864 is used, this time separated in a new file PlatformCommon.as and added as an include in Spiker.as and Dispenser.as.
To make the ray correctly detect the platform, start position position + offset * map.tilesize/2; is used instead of position + offset * 5;

Previously, Dispenser would make a particle and sound without popping out item if its exit is blocked.
I changed it to not make the particle to better indicate that it is blocked.

Tested in offline. Should work the same in online.

Blocked by bridge

but it works if it is opened (since it is non-solid)

[Vam-Jam]

This PR was marked as IN DEVELOPMENT, is it ready for me to test/are there any known issues? I noticed most of your PR's are marked as in development, so i'll ignore that for now

[Vam-Jam]

Code looks sane and can confirm it works in dedi+client setup.

My one suggestion is you can place a platform on a spike that is active, either we should prevent platforms being placed or have the spike retract. This could for for another PR however.

[mugg91]

This didn't work in the "all in one" PR I made but since @Vam-Jam said they confirmed it works, all is good.