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VisualShaderNodeTextureSDFNormal
繼承： VisualShaderNode < Resource < RefCounted < Object
在視覺化著色器圖中，執行 SDF（帶符號距離場）法線紋理搜尋。
說明
翻譯為著色器語言中的 texture_sdf_normal(sdf_pos)。