Add gravity direction properties (#292)

Co-authored-by: leo-paul.couturier <leo-paul.couturier@sloclap.com>

Author: leops

fgd/bases/BaseDustParticleSpawner.fgd

@@ -3,10 +3,12 @@
 = BaseDustParticleSpawner
 	[
 	startdisabled(boolean) : "Start Disabled" : 0
-	color(color255) : "Particle Color (R G B)" : "255 255 255"
+	color(color255) : "Start Particle Color (R G B)" : "255 255 255"
+	color2(color255) : "End Particle Color (R G B)" : "255 255 255"
 	spawnrate(integer) : "Particle Per Second" : 40 : "Number of particles to spawn, per second."
 	speedmax(integer) : "Maximum Particle Speed" : 13 : "Maximum speed that the particles can move after spawning."
 	fallspeed(integer) : "Particle Fall Speed" : 0 : "How fast the particles fall to the ground. This value is subtracted from the particle speed in the Z-axis only."
+	falldirection(vector) : "Particle Fall Direction" : "0 0 0" : "The direction the particles should fall towards, if they are affected by gravity. Note: setting this vector will prevent the particles from being affected by wind."
 	lifetimemin(integer) : "Minimum Particle Lifetime" : 3 : "Minimum number of seconds until each particle dies. Particles live for a random duration between this and 'Maximum Particle Lifetime'."
 	lifetimemax(integer) : "Maximum Particle Lifetime" : 5 : "Maximum number of seconds until each particle dies. Particles live for a random duration between 'Minimum Particle Lifetime' and this. Will be clamped to a max of 15."
 	distmax(integer) : "Maximum Visible Distance" : 1024 : "Maximum distance at which particles are visible. They fade to translucent at this distance."
@@ -19,4 +21,5 @@
 	// Inputs
 	input TurnOn(void) : "Turn on."
 	input TurnOff(void) : "Turn off."
+	input SetFallDirection(vector) : "Update the particle fall direction."
 	]

fgd/brush/trigger/trigger_gravity.fgd

@@ -3,4 +3,7 @@
 	[
 	gravity(float) : "Gravity (0-1)" : 1
 	persist(boolean) : "Persist" : 0 : "Whether the gravity change persists. A setting of 0 will reset gravity to default on exiting. 1 will persist and thus act like how it did in older games like TF2."
+	gravityvector(angle) : "Gravity Direction" : "90 0 0" : "Override the gravity vector of players and paint blobs touching the volume to this direction."
+	
+	input SetGravityDirection(vector) : "Update the gravity vector."
 	]

fgd/brush/trigger/trigger_vphysics_motion.fgd

@@ -7,6 +7,8 @@
 		]
 
 	setgravityscale(float) : "Gravity Scale" : 1.0 : "Scale gravity of objects in the field by this amount."
+	setgravitydirection(vector) : "Gravity Direction" : "0 0 0" : "Orient gravity for objects in the field towards this direction."
+	disableaircontrol(boolean) : "Disable Air Control" : 1 : "Disable air control for players touching this volume."
 	setadditionalairdensity(float) : "Additional air density for drag" : 0
 	setvelocitylimit(float) : "Velocity Limit" : 0.0 : "Max velocity in field (0 disables)"
 	setvelocitylimitdelta(float) : "Velocity Limit Force" : 0.0 : "Max amount to reduce velocity per second when it exceeds the velocity limit (0 disables)"
@@ -32,4 +34,5 @@
 	input SetAngVelocityLimit(float) : "Max angular velocity in field."
 	input SetAngVelocityScale(float) : "Angular Velocity scale/drag"
 	input SetLinearForce(float) : "Linear force (0 disables)"
+	input SetGravityDirection(vector) : "Update the gravity direction."
 	]