More changes

- Adds more variants
- Adds personalized power cells for the shield generator.
- Adds more variants.
- Fixes a mixup of words.
- Rebalances some of the modifiers to make it so they ramp up slower & have at least some effect when nearing the end of the charge.
- Fixes a dividing by 0 bug on specialty shield generators, such as the 'parry' one.
- Adds a huge text wall to explain this stuff to future people.

- Power cells now take longer before starting to charge and now charge slower by default.

code/modules/mob/_modifiers/modifiers.dm

@@ -76,7 +76,7 @@
 	// 0 = immune || < 0 = heals || 1 = full damage || >1 = increased damage.
 	// It should never be below zero as it is not intended to do such, but you are free to experiment!
 	// Ex: Max_brute_resistance = 0. Min_brute resistance = 1. When started, provides 100% resistance to brute. When cell is dying, goes down to 0% resistance.
-	// Max is the MAXIMUM % multiplier that will be taken at a low charge. Min is the MINIMUM % multiplier that will be taken at a full charge.
+	// Max is the MAXIMUM % multiplier that will be taken at a MAX charge. Min is the MINIMUM % multiplier that will be taken at a MINIMUM charge.
 	// Think of it like this: Minimum = what happens at minimum charge. Max = what happens at maximum charge.
 	// Why do I mention this so much? Because even /I/ got confused, and I wrote this thing!
 	var/min_damage_resistance

code/modules/mob/_modifiers/modifiers_vr.dm

@@ -142,7 +142,7 @@
 
 //Shield variants.
 
-//Simple. Goes from 100% resistance to 0% resistance depending on charge.
+//Simple. Goes from 100% resistance to 0% resistance depending on charge. This is mostly an example of a shield variant.
 /datum/modifier/shield_projection/bruteburn
 	max_brute_resistance = 0
 	effective_brute_resistance = 1
@@ -154,19 +154,25 @@
 	max_brute_resistance = 0.5
 	max_fire_resistance = 0.5
 
-/datum/modifier/shield_projection/security // Security backpack.
+//SECURITY VARIANTS
+/datum/modifier/shield_projection/security // Security backpack. 50% resistance at full charge. 90% resistance for the last shot taken.
 	max_brute_resistance = 0.5
+	min_brute_resistance = 0.9
 	effective_brute_resistance = 1
 
 	max_fire_resistance = 0.5
+	min_fire_resistance = 0.9
 	effective_fire_resistance = 1
 
 	max_hal_resistance = 0.5
+	min_hal_resistance = 0.9
 	effective_hal_resistance = 1
 
 /datum/modifier/shield_projection/security/weak // Security belt.
 	max_brute_resistance = 0.75
+	min_brute_resistance = 0.95
 	max_fire_resistance = 0.75
+	min_fire_resistance = 0.95
 	max_hal_resistance = 0.75
 
 /datum/modifier/shield_projection/security/strong // Dunno. Upgraded variant of security backpack?
@@ -175,11 +181,15 @@
 	max_hal_resistance = 0.25
 	siemens_coefficient = 1.5 //Not as weak as normal, but still weak.
 
-/datum/modifier/shield_projection/mining //Base mining belt. 25% resistance.
-	max_brute_resistance = 0.75
+
+//MINING VARIANTS
+/datum/modifier/shield_projection/mining //Base mining belt. 45% resistance that fades to 15% resistance
+	max_brute_resistance = 0.55
+	min_brute_resistance = 0.85
 	effective_brute_resistance = 1
 
-	max_fire_resistance = 0.75
+	max_fire_resistance = 0.55
+	min_brute_resistance = 0.85
 	effective_fire_resistance = 1
 
 	max_hal_resistance = 1.5 // No mobs should be shooting you with halloss. If this happens, it means you're using it wrong!!!
@@ -188,14 +198,31 @@
 
 	disable_duration_percent = 0.75 //Miners often come into contact with things that can stun them.
 
-/datum/modifier/shield_projection/mining/strong // Mining belt, but upgraded. Even weaker to halloss! Tasers WILL destroy you. Don't try to be superman.
+/datum/modifier/shield_projection/mining/strong // Mining belt, but upgraded. Even weaker to halloss! It also scales from .5 to .75 instead of back to 1.0!
 	max_brute_resistance = 0.5
+	min_brute_resistance = 0.75
 	max_fire_resistance = 0.5
+	min_fire_resistance = 0.75
 	disable_duration_percent = 0.5
 
 	max_hal_resistance = 2
 	min_hal_resistance = 2
 
+//MISC VARIANTS
+
+/datum/modifier/shield_projection/biohazard //The odd-ball damage types. Provides near-complete immunity while it's up.
+	min_tox_resistance = 0.25
+	max_tox_resistance = 0
+	effective_tox_resistance = 1
+
+	min_oxy_resistance = 0.25
+	max_oxy_resistance = 0
+	effective_oxy_resistance = 1
+
+	min_clone_resistance = 0.25
+	max_clone_resistance = 0
+	effective_clone_resistance = 1
+
 /datum/modifier/shield_projection/admin // Adminbus.
 	on_created_text = "<span class='notice'>Your shield generator activates and you feel the power of the tesla buzzing around you.</span>"
 	on_expired_text = "<span class='warning'>Your shield generator deactivates, leaving you feeling weak and vulnerable.</span>"
@@ -230,4 +257,26 @@
 
 	max_fire_resistance = 2
 	min_fire_resistance = 2
-	effective_fire_resistance = 1
+	effective_fire_resistance = 1
+
+/datum/modifier/shield_projection/inverted //Becomes stronger the weaker the cell is. Means the last shot taken will be the weakest. Example just to show it can be done.
+	max_brute_resistance = 1
+	min_brute_resistance = 0
+	effective_brute_resistance = 1
+
+	max_fire_resistance = 1
+	min_fire_resistance = 0
+	effective_fire_resistance = 1
+
+/datum/modifier/shield_projection/parry //Intended for 'parry' shields, which only last for a single second before running out of charge
+	max_brute_resistance = 0
+	min_brute_resistance = 0
+	effective_brute_resistance = 1
+
+	max_fire_resistance = 0
+	min_fire_resistance = 0
+	effective_fire_resistance = 1
+
+	max_hal_resistance = 0
+	min_hal_resistance = 0
+	effective_hal_resistance = 1