https://github.com/roymasad/unreal-snow-deformation

Snow Deformation BluePrint for Unreal Engine
https://github.com/roymasad/unreal-snow-deformation

Last synced: 3 months ago
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Snow Deformation BluePrint for Unreal Engine

• Host: GitHub
• URL: https://github.com/roymasad/unreal-snow-deformation
• Owner: roymasad
• License: bsd-2-clause
• Created: 2021-02-28T09:42:15.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2023-10-11T10:14:03.000Z (over 1 year ago)
• Last Synced: 2023-10-11T16:09:58.393Z (over 1 year ago)
• Size: 44.7 MB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Unreal-Snow-Deformation

Snow Deformation BluePrint for Unreal Engine 4

Code Roy Massaad

License BSD 2 

Date: 2018

Tech: Unreal Blueprint

![](screenshot.png)

**Description:**

This is a BluePrint system i put in together in 2016 to enable snow deformation

Last tested and still working on Unreal Engine 4.25.3

**What is in the repository:**

-Sample Project with 1 level using a third person game controller

**Features of Snow blueprint:**

-Supports flat and curved surfaces

-Supports multiple objects deforming the snow surface objects

**How to test it:**

-Clone the repository and open it with Unreal engine, it has all needed files

**What should i look for to figure out how it works:**

-The 2 different blueprint classes of the surfaces and objects affecting them, in addition to the textures, render targets and materials used by them. ( 1 BP for the character, 2 for 2 spheres + 3 for 3 snow surfaces)

**How does the snow deformation system work ?**

-Some objects can deform snow, some objects act as snow surfaces 

-Both objects that can deform and the snow surfaces that can be deformed have different Blueprints that defines them as such allow them to do this

-The snow surfaces material have a dynamic depth normal map that can be edited by other other objects with bluerpints (texture, material, material instance)

-Under each objects that deform snow, there is camera underneath that is tracking their depth shape from underneath (feet, ball bottom..) and it saves this data in a render target

-The objects that can deform snow emits a trace line that goes down, if it hits a snow surface, it can affect its height map by calculating where the UV hit collided, then it draws/merges the camera's render target depth image on the snow surface material in the exact hit location with proper orientation and scaling, effectively editing its depth normal map dynamically

-The blueprints expose variable properties that help tune this, such as strength of impact depth+snow normal merger, length of tracing beam..

**What needs to be improved:**

-Smoother deformation (i tried to blend it with another material, but just barely smoothed it)

-Testing performance on a large scene

-The BP code hasnt been updated since 2016, it needs to be revised and improved

-Better Snow material, i did a quick one for this test

-Maybe its best to do this in C++ instead of BP