Doomsday Manual

Makes this a state triggered generator. Whenever a mobj is set to this state, a new particle generator is spawned. If the spawn flag is set, the generator is only spawned when the source mobj itself is being spawned (handy if the mobj has a loop of states and the generator should only be spawned when the state is first set).

Makes this a flat triggered generator. Each plane with the given flat receives its own generator. Flags can be used to control where the particles are actually spawned.

Makes this a type triggered generator. The value must be a defined thing ID (e.g., “PLAYER”). All type triggered generators are spawned in the beginning of a level, and they create particles using all mobjs of the given type as sources. Use the static flag to prevent the generator from being removed by later generators (could happen when the maximum number of generators is reached).

Alternate mobj type for type triggered generators.

Makes this a damage triggered generator. The generator is spawned when a mobj of the specified type receives damage. The initial movement direction is calculated from the relative positions of the mobjs involved in the operation, so that positive speed values will make the particles move away from the inflictor (in the direction of the damage).

Makes this a map triggered generator. The generator is spawned only in the specified map (e.g., “E2M3”). The Center defines the spawn origin.

Initial speed for new particles.

Randomness of initial particle speed [0..1]:

• 0 = Not random at all.
• 1 = Randomly scaled between zero and the value of Speed.

Initial movement direction for new particles.

Randomness of initial particle direction. Random components of the given value are added to Vector. For example, if Vector Rnd is 2, a random vector with components ranging from -2 to 2 is added to Vector.

One-time random component applied to Vector when the generator is spawned. Works the same as #Vector Rnd but only applied once.

State/Type triggered: An offset to the source coordinates.

• X = Distance on the XY plane (world units), rotated using source angle.
• Y = Source angle offset (degrees).
• Z = Z distance (positive is upwards, world units).

Map triggered: Origin of the generator (X, Y, Z) in the map's coordinate space.

State/Type triggered: If the source is represented by a 3D model, this submodel's center will be used as the origin of the generator. If less than zero, the source's actual coordinates are used and the model has no effect on the origin's position.

Particles will be spawned at a random distance from the center of the source, at a distance of at most this many units. A flat distribution inside a cube is used if the Min spawn radius is zero.

Particles will be spawned at least this many units away from the center of the source. Setting this to a nonzero value will enable the more advanced algorithm for choosing particle spawn coordinates: a random point is chosen inside a sphere with the radius of Spawn radius, but not closer than Min spawn radius.

Maximum distance at which the particles of the generator are visible. If zero, there is no distance limitation.

Number of tics that the generator will create new particles after having been spawned. If -1, the generator will continue creating new particles until destroyed.

Maximum generator lifetime, in tics. If -1, the generator will not be destroyed until either replaced by a newer generator or the level ends.

Maximum number of particles that the generator can have, or the maximum density of particles per 128×128 block (with flat triggered generators using the density flag).

Number of new particles spawned per game tic. Fractional values are allowed (< 1.0).

Randomness of spawn rate (between 0 and 1):

• 0 = Not random.
• 1 = Spawn rate is randomly scaled between zero and the value of Spawn rate.

Number of tics to “think ahead” when the generator is spawned. Useful with flat triggered generators that are visible right after starting a map.

Index number of the alternative particle start stage. By default all particles start from stage zero.

Randomness of initial particle stage (between 0 and 1):

• 0.0 = Default stage (zero) is always used.
• 0.5 = 50% chance of starting with Alt start.
• 1.0 = Always start from Alt start.

Strength of the sphere force that pulls or pushes particles towards the surface of the sphere. In most cases the value should be less than one.

Radius of the sphere for sphere force. The force will push or pull particles to the surface of this sphere, centered around the center of the generator (with the offset specified with Force origin applied).

Defines the coordinates for the force sphere in relation to the center of the source.

The sphere force can also rotate particles around an axis. The length of the axis defines how strong the rotation is.

Each generator can have many particle stages. Each particle will go through the defined stages starting from zero or the alternative start stage.

Type

Specifies the type of a particle during this stage.

Identifier	Description
line	Render particle as a line. The length of the line is determined automatically according to the speed of the particle.
point	Render particle as a point.
texNN	Render the particle as a point-sprite using a texture loaded from the “data/<game-module>/textures/” directory, where the file name is particleNN.ext. For example: “tex01” → particle01.png
modelNN	Render the particle as a model using the definition with ID ParticleNN.

Tics

Number of tics that the particle will spend in this stage.

Rnd

Randomness of stage tics [0..1].

Color

RGBA color of the stage (each component in the range [0..1]). The fourth component of the color vector is the alpha component (1 = opaque, 0 = fully transparent).

Radius

Radius of the particle at this stage, in world units. The visible radius is interpolated between the radii of the current stage and the next one.

Radius Rnd

Randomness of particle radius. The radius of a particle during this stage will be chosen randomly from the range: [ ((1 - RadiusRnd) x Radius) .. Radius ]

Flags

Flags affecting the particle stage:

Flag	Description
stagetouch	When touching a wall or a plane, the particle will immediately skip to the next stage.
stagevtouch	Same as stagetouch but only applies to walls.
stagehtouch	Same as stagetouch but only applies to floor/ceiling planes.
dietouch	Particle will die when it touches a wall or floor/ceiling plane.
bright	Particle color is not affected by the light level of the sector it is in.
flat	When touching a wall or floor/ceiling plane, the particle is drawn flat against the surface.
vflat	Same as flat but only applies to walls.
hflat	Same as flat but only applies to floor/ceiling planes.
force	Particle is affected by the sphere force.
zeroyaw	Set particle yaw to zero.
zeropitch	Set particle pitch to zero.
rndyaw	Set particle yaw to a random value.
rndpitch	Set particle pitch to a random value.

Bounce

Determines how 'bouncy' the particle is [0..1]. Note that particles will only collide with walls and floor/ceiling planes.
0 = Particle loses all its momentum when it hits something (in the direction of the collision).
1 = Particle retains all its momentum and continues moving in the opposite direction after a collision.
>1 = Particle gains extra speed in collisions.

Gravity

Determines how strong an effect gravity has on the particle. The default factor is 1.0.

Force

A linear force that affects the particle during this stage, applied independently of sphere force. Tip: A gravity factor of 1.0 is equivalent to Force { 0 0 -1 }

Resistance

Air resistance for the particle [0..1]:
0.0 = Particle moves without friction.
0.5 = Particle loses half of its momentum each tic.
1.0 = All movement of the particle will stop in one tic.

Spin Resistance

Spin resistance for the particle (yaw and pitch, respectively) [0..1]:
0.0 = Particle spins without resistance.
0.5 = Particle loses half of its spin velocity each tic.
1.0 = All spin velocity of the particle will be lost in one tic.

Frame

First model frame in the animation sequence of a model particle. The animation will interpolate through all the frames between this and End frame.

End Frame

Last model frame in the animation sequence of a model particle.

Spin

Model particle spinning velocity (yaw and pitch, respectively) in degrees per second. Each particle will randomly change the sign of the spinning velocity when the particle is first spawned.

Sound

ID of the sound to play when a particle enters this stage. Sound will use the particle's coordinates as its origin.

Use carefully as starting a lot of sounds is a heavy operation.

Volume

Volume of Sound [0..1].

Hit Sound

ID of the sound to play when a particle hits a surface while in this stage. The sound will use the particle's coordinates as its origin.

Use carefully as starting a lot of sounds is a heavy operation.

Hit Volume

Volume of Hit sound [0..1].