Curve_Terrain

Add-on for Godot Engine to generate simple 3D platformer terrain meshes based on bezier curves

Installation

Copy the folder addons/curve_terrain into your project and activate the add-on from the Project -> Project Settings... -> Plugins menu.

Purpose

I've seen several tweets recently of similar tools in Godot for simple/quick prototyping of level objects. Godot's existing CSGMeshs are useful for prefab shapes but the existing tools for custom shapes are laborious.

Usage

Once the addon is active, you can add a curve_terrain node to your scene. Standard Godot Curve controls are present above the editor viewport to add and manipulate Bezier points. Once more than 3 points are added, the terrain will be generated that matches the Curve profile and is updated in real time as changes are made.

TBD

- Fix non-unique material parameter editing

• Fix add point only updating on every second point
• Add a second subtraction curve that allows you to cut lakes into a landscape.
• Add bevel/lip to terrain edge

Mesh Parameters

The terrain adjustable parameters currently include:

• Depth - The vertical depth of the terrain.
• Bake Interval - The effective resolution of the curve shape. Lower = higher resolution
• Smooth Faces - Self explanatory
• Edge Noise Freq - A very WIP noise modifier for adding procedural variation to the curve. Requires a low Bake Interval and can cause slef intersections which break geometry.
• Edge Noise Strength - The strength of the above variation

Material

• Max Grass Height - Height of the top edge of the Grass Texture (Hard)
• Min Grass Height - Height of the top edge of the Grass Texture (Soft)
• Grass Scale - The UV scaling used for the top texture (assumed to be Grass)
• Dirt Scale - The UV scaling used for the bottom texture (assumed to be Dirt)
• Specular - Basic Specular control (TBC Texture Specular)
• Metallic - Basic Metallic control (TBC Texture Metallic)
• Roughness - Basic Roughness control (TBC Texture roughness)
• Edge UV Scale - Probably redundant as Dirt Scale should be used instead

Current Limitations

• Uses a hidden child node to store geometry, so get_children() or get_child(0) will produce unexpected results
• Material is currently hard coded/not unique. Changes made to one will alter all (make unique currently not working).
• Uses builtin CSGPolygon functionality under the hood, so has similar limitations (i.e their may be a performance dropoff as more objects are created, and they probably shouldn't be subjected to movement at runtime)
• The bundled shader currently allows for a basic two tone approach with minimal configuration for PBRs.
• UV scales need to be adjusted manually and are not altered by depth
• Real time performance drops off the lower Bake Interval becomes (too be expected as vertex count increases).

Credits

• Base textures used and the icon were from the fabulous Kenney assets at https://www.kenney.nl/assets/prototype-textures (CC-0)

Contributing

Please feel free to raise issues or submit PRs. This is my first attempt at a plugin so go easy on me ^^.