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Grass Geometry Shader with Interactivity (Part 2, the editor tool)
🕑 Added 2021-01-12 15:28:34 +0000 UTCEdit: Improved the script a bit, you can now edit the grass too with color and length/width, pastebins are renewed. Grass Shader linked below is also updated!
Hi all,
Here are finally the 2 scripts that let you paint the grass from the Geometry Grass Shader Part 1 post
The first script does the actual painting, the second script is a custom editor
Geometry Painter Script
GeometryPainterScript.cs(Updated): PasteBin Link
The script is sending out raycasts based on your mouse position. When the raycasts hit something that is defined in the layer mask, it puts down Mesh Points that the grass shader will use to create grass blades on.
Grass Painter Editor Script
GrassPainterEditor.cs (Updated) : Pastebin Link
The editor script creates the brush-sized disc that changes color depending on mode, and the custom inspector sliders and buttons
How to use
1. Grab both scripts, GeometryGrassPainter.cs and GrassPainterEditor.cs
The latter goes in the Assets>Editor folder
2. Create new empty Gameobject.
3. Add GeometryGrassPainter.cs, it will automatically add a MeshFilter and MeshRenderer
4. Drag a Material of the Geometry Grass Shader into the MeshRenderer
5. Turn on Add Toggle
6. Paint! By holding right-click. You can swap modes to remove and edit too.
Settings Breakdown;
Grass Limit, just in case, you can limit the number of points painted (number of grassblades per point are defined in the shader, so it's more blades than points)
Paint Status - Add, remove points, or edit color and size
Layer Mask - The Physics layers you can paint on
Brush Size - Radius size of brush
Density - How many points are put down within the brush radius
Normal Limit - Angle limit of where the points are placed. 0 = only perfectly flat, 1 = every angle
Brush Color - Additional tinting to the grass material
Color Variation - Add some random color values into the material per point, split into Red Green Blue.
Clear Mesh - Deletes all points (Has extra confirmation dialogue to make sure)
Thanks for reading!
