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Fire bullets

Fire bullets, manage ammo, reloading and overheating.

Authors and contributors to this experimental extension: 4ian, Muzan7, Bouh, VictrisGames.

This extension allows objects to fire bullets. To use it, add the behavior to the object that will shoot, then use the provided action to launch another object as the bullet.

The properties of the behavior can be used to customize:

The speed can be specified when using the actions to fire the bullets. The bullets are automatically given a permanent force to make them move (no need to use a linear movement or move them with another behavior).

It can be used for:

A simple example shows how to make firing patterns (open the project online).

Read more...

Tip

Learn how to install new extensions by following a step-by-step guide.

Fire bullets

Fire bullets, manage ammo, reloading, and overheating. Once added to your object that must shoot, use the behavior action in your events to fire another object as a bullet. This action will also make the bullet move (using a permanent force) at the speed specified in the action.

Behavior actions

Fire bullets toward an angle
Fire bullets in the direction of a given angle at a specified speed.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2 (🔢 Number): X position, where to create the bullet
  • Parameter 3 (🔢 Number): Y position, where to create the bullet
  • Parameter 4 (👾 Object): The bullet object
  • Parameter 5 (🔢 Number): Angle of the bullet, in degrees
  • Parameter 6 (🔢 Number): Speed of the bullet, in pixels per second

Technical note: parameter 7 are internal parameters handled by GDevelop.

Fire bullets toward an object
Fire bullets toward an object at a specified speed.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2 (🔢 Number): X position, where to create the bullet
  • Parameter 3 (🔢 Number): Y position, where to create the bullet
  • Parameter 4 (👾 Object): The bullet object
  • Parameter 5 (👾 Object): Target object
  • Parameter 6 (🔢 Number): Speed of the bullet, in pixels per second

Technical note: parameter 7 are internal parameters handled by GDevelop.

Fire bullets toward a position
Fire bullets toward a position at a specified speed.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2 (🔢 Number): X position, where to create the bullet
  • Parameter 3 (🔢 Number): Y position, where to create the bullet
  • Parameter 4 (👾 Object): The bullet object
  • Parameter 5 (🔢 Number): Target X position
  • Parameter 6 (🔢 Number): Target Y position
  • Parameter 7 (🔢 Number): Speed of the bullet, in pixels per second

Technical note: parameter 8 are internal parameters handled by GDevelop.

Increase ammo
Increase ammo quantity.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2 (🔢 Number): Ammo gained

Technical note: parameter 3 are internal parameters handled by GDevelop.

Reload ammo
Reload ammo.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Reset total bullets created
Reset total bullets created.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Reset total reloads completed
Reset total reloads completed.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Reset total shots fired
Reset total shots fired.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Ammo quantity
Change the ammo quantity.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Angle variance
Change the angle variance (in degrees) applied to each bullet.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Enable (or disable) automatic reloading
Enable (or disable) automatic reloading.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2 (❓ Yes or No): Enable automatic reloading

Technical note: parameter 3 are internal parameters handled by GDevelop.

Set bullet layer
Change the layer that bullets are created on.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🔤 Layer name (String)

Technical note: parameter 3 are internal parameters handled by GDevelop.

Bullets per shot
Change the number of bullets shot every time the "fire bullet" action is used.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Bullet speed variance
Change the bullet speed variance (pixels per second) applied to each bullet.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Firing cooldown
Change the firing cooldown (in seconds) also known as rate of fire.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Exponential cooling rate
Change the exponential cooling rate, per second.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Firing arc
Change the firing arc (in degrees) where bullets are shot. Bullets are evenly spaced out inside the firing arc.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Heat increase per shot
Change the heat increase per shot.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Linear cooling rate
Change the linear cooling rate (per second).

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Max ammo
Change the max ammo.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Overheat duration
Change the overheat duration (in seconds). When an object is overheated, it can't fire for this duration.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Reload duration
Change the reload duration (in seconds).

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Enable (or disable) bullet rotation
Enable bullet rotation.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2 (❓ Yes or No): Rotate bullet to match trajetory

Technical note: parameter 3 are internal parameters handled by GDevelop.

Shots per reload
Change the number of shots per reload.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Operator
  • Parameter 3 (🔢 Number): Value

Technical note: parameter 4 are internal parameters handled by GDevelop.

Enable (or disable) unlimited ammo
Enable unlimited ammo.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2 (❓ Yes or No): Unlimited ammo

Technical note: parameter 3 are internal parameters handled by GDevelop.

Behavior conditions

Ammo quantity
Compare the ammo quantity.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Angle variance
Compare the angle variance (in degrees) applied to each bullet.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Bullets per shot
Compare the number of bullets shot every time the "fire bullet" action is used.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Is bullet rotation enabled
Check if bullet rotates to match trajectory.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Bullet speed variance
Compare the bullet speed variance (pixels per second) applied to each bullet.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Firing cooldown
Compare the firing cooldown (in seconds) also known as rate of fire.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Duration before cooldown end
Compare the remaining duration before the cooldown will permit a bullet to be fired, in seconds.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Exponential cooling rate
Compare the exponential cooling rate, per second.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Firing arc
Compare the firing arc (in degrees) where bullets are shot. Bullets are evenly spaced out inside the firing arc.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Has just fired
Check if the object has just fired something.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Heat increase per shot
Compare the heat increase per shot.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Heat level
Compare the heat level (range: 0 to 1).

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Is automatic reloading enabled
Check if automatic reloading is enabled.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Is firing cooldown active
Check if firing cooldown is active.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Is out of ammo
Check if object has no ammo available.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Is overheated
Check if object is overheated.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Is ready to shoot
Check if object is ready to shoot.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Is ammo reloading in progress
Check if object is currently performing an ammo reload.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Is a reload needed
Check if object needs to reload ammo.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Is ammo unlimited
Check if ammo is unlimited.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior

Technical note: parameter 2 are internal parameters handled by GDevelop.

Linear cooling rate
Compare the linear cooling rate (per second).

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Max ammo
Compare the max ammo.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Overheat duration
Compare the overheat duration (in seconds). When an object is overheated, it can't fire for this duration.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Duration before overheat end
Compare the remaining duration before the overheat penalty ends, in seconds.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Reload duration
Compare the reload duration (in seconds).

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Duration before the reload finishes
Compare the remaining duration before the reload finishes, in seconds.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Shots before next reload
Compare the remaining shots before the next reload is required.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Shots per reload
Compare the number of shots per reload.

See parameters
  • Parameter 0: 👾 Object
  • Parameter 1: 🧩 Behavior
  • Parameter 2: 🟰 Relational operator
  • Parameter 3 (🔢 Number): Value to compare

Technical note: parameter 4 are internal parameters handled by GDevelop.

Behavior expressions

Expression Description
Object.FireBullet::AmmoQuantity() Return the ammo quantity.
Object.FireBullet::AngleVariance() Return the angle variance (in degrees) applied to each bullet.
Object.FireBullet::BulletLayer() Layer that bullets are created on.
Object.FireBullet::BulletQuantity() Return the number of bullets shot every time the "fire bullet" action is used.
Object.FireBullet::BulletSpeedVariance() Return the bullet speed variance (pixels per second) applied to each bullet.
Object.FireBullet::Cooldown() Return the firing cooldown (in seconds) also known as rate of fire.
Object.FireBullet::CooldownTimeLeft() Return the remaining duration before the cooldown will permit a bullet to be fired, in seconds.
Object.FireBullet::ExponentialCoolingRate() Return the exponential cooling rate, per second.
Object.FireBullet::FiringArc() Return the firing arc (in degrees) where bullets are shot. Bullets are evenly spaced out inside the firing arc.
Object.FireBullet::HeatIncreasePerShot() Return the heat increase per shot.
Object.FireBullet::HeatLevel() Return the heat level (range: 0 to 1).
Object.FireBullet::LinearCoolingRate() Return the linear cooling rate (per second).
Object.FireBullet::MaxAmmo() Return the max ammo.
Object.FireBullet::OverheatDuration() Return the overheat duration (in seconds). When an object is overheated, it can't fire for this duration.
Object.FireBullet::OverheatTimeLeft() Return the remaining duration before the overheat penalty ends, in seconds.
Object.FireBullet::ReloadDuration() Return the reload duration (in seconds).
Object.FireBullet::ReloadTimeLeft() Return the remaining duration before the reload finishes, in seconds.
Object.FireBullet::ShotsBeforeNextReload() Return the remaining shots before the next reload is required.
Object.FireBullet::ShotsPerReload() Return the number of shots per reload.
Object.FireBullet::TotalBulletsCreated() Total bullets created.
Object.FireBullet::TotalReloadsCompleted() Reloads completed.
Object.FireBullet::TotalShotsFired() Total shots fired (multi-bullet shots are considered one shot).

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