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Animated acid shader

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MaddoScientisto 2026-03-01 17:46:24 +01:00
commit 6777cb1447
5 changed files with 301 additions and 217 deletions
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33
3D/TrenchBroom/EntityScripts/Solid/acidarea.gd
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@ -2,5 +2,38 @@
class_name AcidArea
extends Area3D
const _ACID_SHADER := preload("res://Shaders/Acid.gdshader")
# Replace this path with your actual noise texture resource once you have one saved on disk.
# A NoiseTexture2D saved as a .tres file works well here.
const _NOISE_TEX_PATH := "res://Shaders/acid_noise.tres"
func _init() -> void:
add_to_group("Acid", true)
func _ready() -> void:
if Engine.is_editor_hint():
return
var noise_tex: NoiseTexture2D = null
if ResourceLoader.exists(_NOISE_TEX_PATH):
noise_tex = load(_NOISE_TEX_PATH)
for child in find_children("*", "MeshInstance3D", true, false):
_apply_shader_to_mesh(child as MeshInstance3D, noise_tex)
func _apply_shader_to_mesh(mesh_instance: MeshInstance3D, noise_tex: NoiseTexture2D) -> void:
var surface_count := mesh_instance.get_surface_override_material_count()
if surface_count == 0 and mesh_instance.mesh != null:
surface_count = mesh_instance.mesh.get_surface_count()
for i in range(surface_count):
# Grab the texture func_godot baked into the surface before we replace the material
var existing_tex: Texture2D = null
var existing_mat := mesh_instance.mesh.surface_get_material(i) as BaseMaterial3D
if existing_mat != null:
existing_tex = existing_mat.albedo_texture
var mat := ShaderMaterial.new()
mat.shader = _ACID_SHADER
if existing_tex != null:
mat.set_shader_parameter("albedo_tex", existing_tex)
if noise_tex != null:
mat.set_shader_parameter("noise_tex", noise_tex)
mesh_instance.set_surface_override_material(i, mat)