44 lines
1.4 KiB
GDScript3
44 lines
1.4 KiB
GDScript3
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extends MeshInstance3D
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var fnl = FastNoiseLite.new()
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var mdt = MeshDataTool.new()
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func _ready():
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fnl.frequency = 0.7
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mdt.create_from_surface(mesh, 0)
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for i in range(mdt.get_vertex_count()):
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var vertex = mdt.get_vertex(i).normalized()
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# Push out vertex by noise.
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vertex = vertex * (fnl.get_noise_3dv(vertex) * 0.5 + 0.75)
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mdt.set_vertex(i, vertex)
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# Calculate vertex normals, face-by-face.
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for i in range(mdt.get_face_count()):
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# Get the index in the vertex array.
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var a = mdt.get_face_vertex(i, 0)
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var b = mdt.get_face_vertex(i, 1)
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var c = mdt.get_face_vertex(i, 2)
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# Get vertex position using vertex index.
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var ap = mdt.get_vertex(a)
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var bp = mdt.get_vertex(b)
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var cp = mdt.get_vertex(c)
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# Calculate face normal.
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var n = (bp - cp).cross(ap - bp).normalized()
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# Add face normal to current vertex normal.
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# This will not result in perfect normals, but it will be close.
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mdt.set_vertex_normal(a, n + mdt.get_vertex_normal(a))
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mdt.set_vertex_normal(b, n + mdt.get_vertex_normal(b))
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mdt.set_vertex_normal(c, n + mdt.get_vertex_normal(c))
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# Run through vertices one last time to normalize normals and
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# set color to normal.
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for i in range(mdt.get_vertex_count()):
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var v = mdt.get_vertex_normal(i).normalized()
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mdt.set_vertex_normal(i, v)
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mdt.set_vertex_color(i, Color(v.x, v.y, v.z))
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mesh.clear_surfaces()
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mdt.commit_to_surface(mesh)
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