Weapon FOV

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Weapon FOV is an advanced and very useful material node that solves many issues related to the first-person character. This package will take your FPP game to industry standards like Shadow Warrior, HL2, Battlefield, Dying Light, and much more without any noticeable additional cost.

It is just one node in material calculated per vertex, so implementation is very fast. You don’t need to use an additional render target or separate pass to fix problems with a weapon.

Unreal Marketplace :
https://www.unrealengine.com/marketplace/weapon-fov

Features:

• Separate weapon FOV – You can set a custom field of view per weapon. This fixes the weapon stretching when changing the game FOV and is helpful for calibrating weapon size on the screen independently of the camera.
• Weapon depth priority – Weapon scale in camera Z-axis (depth). This feature fixes the intersection of weapons with walls. The player capsule radius can be smaller, and the weapons can be rendered over the environment.
• Near-plane clipping – Modify the near-clip plane to see more/less mesh in the camera.
• Weapon transform – Applies a custom position of the weapon in camera space.
• Effect blending – Implements the transition between FOV space and world space. It is useful for projectiles and the character’s body that is standing on the ground.
• Material node – Can be customized per weapon or controlled in global material parameter collection.
• Clean implementation – Calculated per-vertex, very fast no need to use the separate pass to fix problems with a weapon.
• Zooming effect – Change the camera FOV when the weapon stays the same. That makes scope zoom effect really easy to implement.
• NEW! Realistic sniper scope – Multiple parameters: lens refraction, aberration, overlays, etc.

Get Started

1. Open material that should be rendered in special weapon FOV mode.
2. Go to detail panel on the left-hand side ( Default Viewport on 4.23 )
   Check ” Materials > Use Material attributes [ Bool Value ] “ to true. 
3. Create a new node ” MakeMaterialAttributes “ and plug everything the same as how your materials work.
4. Create a new materials function node ” ML_WeaponFOV “ plug into ” Material Attributes “.
5. Or in case you have “ Use Material attributes = False ”in the material then put” MF_WeaponFOV “ material node before the final node in the chain.
6. Here is an example of materials.
7. 

Parameters

All global parameters can be edited by ( MP_WeaponFOV [ Material Parameter Collection ] ) inside of the Weapon FOV folder.

Weapon FOV

A custom field of view for the mesh applied with materials fixes the weapon stretching when the field of view of the game camera has been changed to other values. This is useful for implementing the zoom effect and calibrating weapon size on the screen independently of the camera.

Clip Distance

Modify near clip plane to see more/less of mesh in the camera, This function is working same as (Near clip plane) features in Unreal Engine 4.

Depth Scale

Weapon scale in camera Z-axis (depth). This feature prevents weapons from intersecting with walls. The Player capsule radius can be small, and the weapons will still be rendered over the scene’s geometry.

Blend Effect

It implements a transition between FOV space and world space based on the distance from the camera. This is useful for projectiles and character bodies standing on the ground.

Wide Screen

By default, the engine uses Horizontal FOV ( adjusting FOV when the screen stretches on the X-axis). To enable widescreen support, you need to change how FOV is calculated in the player camera:

Camera.AspectRatioAxisContraint = Maintain-XAxisFOV 

The WeaponFOV System needs to know how to interpret the constant FOV in the project.

MP_WeaponFOV.ConstantRatio = 0 This option forces the system to keep the mesh size the same when the screen is wide.

Scope Material

The WeaponFOV package in version 1.2 introduces a new feature that helps to implement sniper scope in your games.

Basically the scope implementation is base on rendering the scene to texture form second zoom camera installed inside the scope so it can be little heavy and should be used wisely

New advanced material M_ScopeLens can be found in the Utils folder.

For example, the material of M_ScopeLens can be found in the Demo folder WeaponFov/Demo/Weapon/MI_ScopeLens. Multiple parterres can be modified to achieve a very realistic effect of scope all visual effects are divided into three categories Lens Layer, Overlay Layer, Circle Mask:

Circle Layer

The black circle represents the mask of effect.

Lens Layer

Distortion is used on texture rendered from the additional camera.

Overlay Layer

The texture layer renders the telescopic sight.

Advanced Mesh UV

Mesh UV is a group of advanced parameters that can be used to adjust the UV mapping of the scope projection on the screen.

Questions & Answers