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Introduction
In this part 2, our character will hold a rifle, aim, shoot with sound, count ammunition, and be able to reload. All done with blueprints, no coding required. Hello, welcome back to Cerdas Inovasi Digital. We continue the TPS Shooter project from part 1. Now we add a weapon and shooting system. Let's start.
Add weapon asset: Add » Add Feature or Content Pack
First, we need a weapon model. In the content browser, click Add, then select Add Feature or Content Pack.
Select First Person, click Add to Project
Select the First Person package, then click Add to Project. This package is free from Unreal and contains rifle, pistol, and shooting sound models.
The Folder Weapons contains Rifle, Pistol and shooting sound
Open the Weapons folder. Here we have Rifle, Pistol, and Grenade Launcher. We will use the Rifle along with its mesh.
Search and open ABP Unarmed (Animation Blueprint)
Now we set up the animation so the character holds the rifle. Find and open ABP Underscore Unarmed, which is the Animation Blueprint of the character.
Open AnimGraph from the My Blueprint
Double-click Anim Grab in the My Blueprint panel to open the animation graph.
mb node Layered blend per bone
Right-click, then add a node Layered Blend per bone. This node blends two animations based on body bone parts.
Add node Layered Jan per bm
Connect the output of Control Rig to Base Pose, then the output of Layered Blend to Output Pose.
From Pin Blend Poses 0, drag and select the animation MF Underscore Refle Underscore Idle Underscore ADS.
.... Blend Poses 0: sa MR ADS aim rifle)
This is the pose holding the rifle while aiming.
Select node Layered blend, check Mesh Space Rotation Blend
Select the node Layered Blend per bone, then in the details panel, check Mass Space Rotation Blend, so that the upper body rotation follows the aiming direction.
Layer Setup » Branch Filters: amin Bone Nine - spine 01
On the setup screen, add a Branch Filter and fill the bone name with Spine Underscore 01. This means starting from the spine upwards uses the rifle pose, While the legs still use the running animation.
Compile: upper body holding, tifle, legs still running
Click Compile. Check the preview window, the upper body is now in the position of holding the rifle. Save and close the Animation Blue Apprint.
Save then close A8P Unamed
Now we will create a shooting button.
Folder Input » Actions: create IA Shoot and IA Reload
In the input folder, Actions, create two new input actions, IA Underscore Shoot and IA Underscore Reload. Then click Save All.
Open IMC Default
Open IMC Underscore Default, where we map the buttons.
Mapping IA Shoot - Left Click Mouse
Add a new mapping, select IA Underscore Shoot, then select the left mouse button, which is the left click. Add another mapping for IA Underscore Reload, using the R key on the keyboard.
Save IMC Default then close
Save the input mapping and close the window.
Open BP ThirdPersonCharacter
Next, open the Blue Apprint character, BP Underscore Third Person Character.
Select Mesh, Add » Skeletal Mesh, name it Weapon
Select the Mesh Component, click Add, select Skeletal Mesh, and name it weapon. This component will become the rifle held by the character.
Skeletal Mesh Asset - SKM Rifle
In the Skeletal Mesh Asset, select SKM Underscore Rifle. In the Parent Socket, select Handgrip Underscore R Socket, which is already prepared in the character's right hand, so the rifle fits directly into the grip.
View in Viewport: rifle is now in the hand
Open the Viaport tab. The rifle is already in the character's hand with the correct position.
Create a variable named Amunisi with type Integer
Now create a Variable for Ammunition. Click the plus sign on Variables, name it ammunition, then change its type to integer, which is a whole number. Click Compile, then set the default value of ammunition to 30 bullets.
Create a new graph named Menembak
For neatness, create a new function specifically named Shoot.
Add an event IA Shoot
Right-click and add an event IA Underscore Shoot.
Started → Branch: shoot only if Amunisi > 0
From the Started pin, create a Branch node. The condition is, ammunition is greater than 0. So the character can only shoot if there are bullets left. If True, add a node for Damage Int from the Ammunition Variable.
True → Decrement Int: Amunisi decreases by 1
Each shot reduces ammunition by 1.
Play Sound at Location: gunshot sound
Add Play Sound at Location, then select the built-in gunshot sound from the First Person package.
Location of sound: Weapon → Get Socket Location (Muzzle)
We take the sound location from the end of the barrel. Attach the weapon component, then Get Socket Location with the name Socket Musle.
Line Trace By Channel: bullet trace line
Add another node Trace By Channel. This is an invisible line that detects what gets hit by the shot. We enable Draw The Book Type 4 Duration so the line is visible when trying.
Start - camera follow location
The start point of the line is the camera position. Attach Follow Camera, then Gateway Location, and connect to Start.
h va - Start 4 Forward Vector x 5000
The end point is the camera position plus the camera's forward direction multiplied by 5000. Use Gate Forward Factor, Multiply, and Add, then connect to End.
sa display remaining Amunisi on screen
Add Print String and connect to the Ammunition Variable, so the remaining bullets are displayed on screen.
Ka IA Reload: SET Amunisi to 30
For Reload, add the event IA underscore Reload, then set ammunition back to 30.
Cerdas Inovasi Digital and Save, then close Blueprint
Click Compile and Save, close the Blueprint, then save all with Save All.
Play: right click to aim, left click to shoot, R to reload
It's time to try it out. Press Play. Hold right-click to aim, left-click to shoot. Notice the shooting line, the red dot where the bullet hits the target, and the ammunition count decreasing. Press R to Reload.
Done! The character can now shoot
Done. Our character is now holding a rifle and can shoot. In part 3, we will build the combat arena environment. Don't forget to subscribe, like, and share. Goodbye. Want to master game development with Unreal Engine? Cerdas Inovasi Digital opens a complete Unreal Engine course, game development services and 3D character creation as well as selling ready-to-use project files. Contact our WhatsApp or visit cerdasinovasidigital.com
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Cerdas Inovasi Digital Team
Software developers, BIM & 3D engineers, and AI practitioners
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We build software, BIM models, games and AI automations for clients every day, and turn that hands-on work into step-by-step classes: every step is shown on screen and comes with a PDF guide you can keep.
