Repository Analysis

effekseer/Effekseer

3.2 Likely human-written View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of effekseer/Effekseer, a C project with 1,732 GitHub stars. SynthScan v2.0 examined 492,013 lines of code across 1453 source files, recording 1342 pattern matches distributed across 12 syntactic categories. The overall adjusted score of 3.2 places this repository in the Likely human-written band.

The scanner applied 160+ deterministic lexical heuristics, multi-line block detectors, abstract syntax tree depth profilers, and a cross-file Jaccard similarity matrix to construct a statistically normalised synthetic code estimate. All matches are individually weighted by severity coefficient and contextual multiplier before summation, and the resulting headline score is temporally discounted to account for the repository's development history relative to the commercial emergence of large language model coding tooling (November 2022 onward).

3.2
Adjusted Score
3.2
Raw Score
100%
Time Factor
2026-07-12
Last Push
1.7K
Stars
C
Language
492.0K
Lines of Code
1.5K
Files
1.3K
Pattern Hits
2026-07-14
Scan Date
0.02
HC Hit Rate

What These Metrics Mean

Adjusted Score
Primary synthetic code indicator. Raw score normalised per 1,000 lines of code and multiplied by the temporal discount factor. This is the definitive comparative metric — use it to rank repositories by AI authorship density.
Raw Score
The unmodified sum of all severity-weighted, context-multiplied pattern match scores before temporal discounting. Reflects the absolute signal strength independent of when the repository was last active.
Time Factor
The temporal discount multiplier (0–100%) applied to the raw score. Repositories last updated before ChatGPT's launch (Nov 2022) receive a 5% factor. Full signal is only assigned to repositories active in the post-adoption era (Jan 2024+).
Pattern Hits
Total count of individual pattern matches across all files and categories. A high hit count with a low score may indicate a very large codebase with isolated AI snippets; a low count with a high score indicates dense, concentrated AI signatures.
HC Hit Rate
High+Critical pattern hits per file, averaged across the repository. This orthogonal signal catches repositories where a few files are densely packed with high-severity AI tells — a strong indicator even when the normalised score appears moderate due to codebase size.
Lines of Code / Files
Total lines and files analysed. The scanner examines 94 file extensions. These denominators are used to normalise the score, enabling fair comparison between repositories of vastly different sizes.

Score History

Longitudinal tracking requires multiple scan runs. Once this repository is re-scanned after new commits land, this chart will visualise how the synthetic code signal evolves over time — enabling you to detect whether AI authorship is growing, stabilising, or being actively corrected by human engineers.

No multi-scan history yet — run the scanner again to build trend data.

Severity Breakdown

Classifies detected patterns by their diagnostic confidence and structural impact. CRITICAL patterns (coefficient 10) represent definitive synthetic signatures — hallucinated imports, explicit LLM attribution metadata — virtually never produced by human authors. HIGH (5) indicates strong structural tells such as cross-file repetition or cross-linguistic idioms. MEDIUM (2) covers recognisable conversational padding and AI-specific vocabulary. LOW (1) captures subtle indicators like tautological comments and generic boilerplate that require density to carry independent signal.

CRITICAL 26HIGH 0MEDIUM 19LOW 1297

Directory Score Breakdown

This horizontal bar chart decomposes the repository's raw synthetic code score by top-level directory, allowing you to pinpoint precisely which modules or components carry the highest AI authorship density. Directories with disproportionately high scores relative to their size warrant targeted manual review: concentrated AI signatures often trace back to mass-generated configuration layers, auto-ported test suites, LLM-scaffolded boilerplate classes, or entire subsystems authored under heavy copilot assistance. Use this view to prioritise your human code-review effort.

Pattern Findings

The scanner identified 1342 distinct pattern matches across 12 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a statistically significant AI authorship indicator. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.

Reading the findings table: The Severity column indicates the diagnostic confidence level (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — comment-context matches receive a ×1.5 weight because LLMs systematically over-annotate. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier as dense clusters constitute far stronger evidence of synthetic authorship than isolated hits.

Over-Commented Block1251 hits · 1084 pts
SeverityFileLineSnippetContext
LOWdocs/Help_Cpp/18x/Guide_Cpp_Ja.md461#elseCOMMENT
LOWdocs/Help_Cpp/18x/Guide_Cpp_En.md441COMMENT
LOWExamples/DirectX11/main.cpp1COMMENT
LOWExamples/Trigger/main.cpp1// Choose from the following graphics APIs you want to enableCOMMENT
LOWExamples/GpuParticles/main.cpp1// Choose from the following graphics APIs you want to enableCOMMENT
LOWExamples/Distortion/main.cpp1// Choose from the following graphics APIs you want to enableCOMMENT
LOWExamples/Distortion/main.cpp221COMMENT
LOWExamples/NetworkServer/main.cpp1// Choose from the following graphics APIs you want to enableCOMMENT
LOWExamples/Utils/stb_image_utils.h121// DOCUMENTATIONCOMMENT
LOWExamples/Utils/stb_image_utils.h141// int desired_channels -- if non-zero, # of image components requested in resultCOMMENT
LOWExamples/Utils/stb_image_utils.h161// 2 grey, alphaCOMMENT
LOWExamples/Utils/stb_image_utils.h181// and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convertCOMMENT
LOWExamples/Utils/stb_image_utils.h201// provide more explicit reasons why performance can't be emphasized.COMMENT
LOWExamples/Utils/stb_image_utils.h221// SIMD supportCOMMENT
LOWExamples/Utils/stb_image_utils.h241//COMMENT
LOWExamples/Utils/stb_image_utils.h261// If you load LDR images through this interface, those images willCOMMENT
LOWExamples/Utils/stb_image_utils.h281// by calling stbi_convert_iphone_png_to_rgb(0), in which caseCOMMENT
LOWExamples/Utils/stb_image_utils.h301// STBI_NO_PSDCOMMENT
LOWExamples/Utils/stb_image_utils.h361//#ifdef __cplusplusCOMMENT
LOWExamples/Utils/stb_image_utils.h521COMMENT
LOWExamples/Utils/stb_image_utils.h541 #ifndef STBI_ONLY_PSDCOMMENT
LOWExamples/Utils/stb_image_utils.h561#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB)COMMENT
LOWExamples/Utils/stb_image_utils.h581COMMENT
LOWExamples/Utils/stb_image_utils.h601 #define stbi_inline __forceinlineCOMMENT
LOWExamples/Utils/stb_image_utils.h621#elseCOMMENT
LOWExamples/Utils/stb_image_utils.h641COMMENT
LOWExamples/Utils/stb_image_utils.h661COMMENT
LOWExamples/Utils/stb_image_utils.h681#define STBI_NO_SIMDCOMMENT
LOWExamples/Utils/stb_image_utils.h741{COMMENT
LOWExamples/Utils/stb_image_utils.h1021}COMMENT
LOWExamples/Utils/stb_image_utils.h1661COMMENT
LOWExamples/Utils/stb_image_utils.h1841}COMMENT
LOWExamples/Utils/stb_image_utils.h2821COMMENT
LOWExamples/Utils/stb_image_utils.h3961// simple implementationCOMMENT
LOWExamples/Utils/stb_image_utils.h5921COMMENT
LOWExamples/Utils/stb_image_utils.h5981 // RLE as used by .PSD and .TIFFCOMMENT
LOWExamples/Utils/stb_image_utils.h7201 } while (chained);COMMENT
LOWExamples/CustomAsyncLoader/main.cpp1// Choose from the following graphics APIs you want to enableCOMMENT
LOWExamples/DirectX12/DeviceDX12.h1#pragma onceCOMMENT
LOWExamples/DirectX12/main.cpp1COMMENT
LOWExamples/CustomLoader/main.cpp1// Choose from the following graphics APIs you want to enableCOMMENT
LOWExamples/SortHandle/main.cpp1// Choose from the following graphics APIs you want to enableCOMMENT
LOWExamples/Multithread/main.cpp1COMMENT
LOWDev/Cpp/EffekseerRendererDX12/EffekseerRendererDX12.h1COMMENT
LOW…X12/EffekseerRendererDX12/EffekseerRendererDX12.Base.h1COMMENT
LOW…12/EffekseerRendererDX12/ShaderHeader/model_unlit_ps.h1#if 0COMMENT
LOW…12/EffekseerRendererDX12/ShaderHeader/model_unlit_ps.h21// float4 _225_fCameraFrontDirection; // Offset: 96 Size: 16 [unused]COMMENT
LOW…12/EffekseerRendererDX12/ShaderHeader/model_unlit_ps.h41// sampler_colorTex sampler NA NA 0 1COMMENT
LOW…seerRendererDX12/ShaderHeader/ad_model_distortion_ps.h1#if 0COMMENT
LOW…seerRendererDX12/ShaderHeader/ad_model_distortion_ps.h21// float4 _393_reconstructionParam1; // Offset: 96 Size: 16COMMENT
LOW…seerRendererDX12/ShaderHeader/ad_model_distortion_ps.h41// _alphaTex texture float4 2d 2 1COMMENT
LOW…seerRendererDX12/ShaderHeader/ad_model_distortion_ps.h61// TEXCOORD 6 xyzw 6 NONE float xyzwCOMMENT
LOW…fekseerRendererDX12/ShaderHeader/model_distortion_ps.h1#if 0COMMENT
LOW…fekseerRendererDX12/ShaderHeader/model_distortion_ps.h21// float4 _155_reconstructionParam1; // Offset: 96 Size: 16COMMENT
LOW…fekseerRendererDX12/ShaderHeader/model_distortion_ps.h41// Input signature:COMMENT
LOW…eerRendererDX12/ShaderHeader/gpu_particles_update_cs.h1#if 0COMMENT
LOW…eerRendererDX12/ShaderHeader/gpu_particles_update_cs.h21// uint ParticleSize; // Offset: 12COMMENT
LOW…eerRendererDX12/ShaderHeader/gpu_particles_update_cs.h41// {COMMENT
LOW…eerRendererDX12/ShaderHeader/gpu_particles_update_cs.h61// float4 ScaleData2[2]; // Offset: 192COMMENT
LOW…eerRendererDX12/ShaderHeader/gpu_particles_update_cs.h81// uint MaterialType; // Offset: 332COMMENT
1191 more matches not shown…
Hallucination Indicators26 hits · 365 pts
SeverityFileLineSnippetContext
CRITICALDev/Editor/Effekseer/GUI/Dock/NodeTreeView.cs156 Core.MoveNode(movedNode, n2.Node.Parent, n2.Node.Parent.Children.Internal.IndexOf(n2.Node as Data.Node));CODE
CRITICALDev/Editor/EffekseerCore/Core.cs321 System.Globalization.CultureInfo customCulture = (System.Globalization.CultureInfo)System.Threading.Thread.CurrentThrCODE
CRITICALDev/Editor/EffekseerCore/Binary/Exporter.cs756 data.Add(param.Mesh.AngleBeginEnd.X.Value.GetBytes());CODE
CRITICALDev/Editor/EffekseerCore/Binary/Exporter.cs757 data.Add(param.Mesh.AngleBeginEnd.Y.Value.GetBytes());CODE
CRITICALDev/Editor/EffekseerCore/Binary/AlphaCutoffValues.cs19 var refBuf = value.Fixed.Threshold.DynamicEquation.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/ScaleValues.cs24 var refBuf = value.Fixed.Scale.DynamicEquation.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/ScaleValues.cs32 var refBuf1_1 = value.PVA.Scale.DynamicEquationMax.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/ScaleValues.cs33 var refBuf1_2 = value.PVA.Scale.DynamicEquationMin.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/ScaleValues.cs34 var refBuf2_1 = value.PVA.Velocity.DynamicEquationMax.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/ScaleValues.cs35 var refBuf2_2 = value.PVA.Velocity.DynamicEquationMin.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/ScaleValues.cs36 var refBuf3_1 = value.PVA.Acceleration.DynamicEquationMax.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/ScaleValues.cs37 var refBuf3_2 = value.PVA.Acceleration.DynamicEquationMin.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/LocationValues.cs22 var refBuf = value.Fixed.Location.DynamicEquation.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/LocationValues.cs30 var refBuf1_1 = value.PVA.Location.DynamicEquationMax.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/LocationValues.cs31 var refBuf1_2 = value.PVA.Location.DynamicEquationMin.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/LocationValues.cs32 var refBuf2_1 = value.PVA.Velocity.DynamicEquationMax.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/LocationValues.cs33 var refBuf2_2 = value.PVA.Velocity.DynamicEquationMin.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/LocationValues.cs34 var refBuf3_1 = value.PVA.Acceleration.DynamicEquationMax.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/LocationValues.cs35 var refBuf3_2 = value.PVA.Acceleration.DynamicEquationMin.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/RotationValues.cs22 var refBuf = value.Fixed.Rotation.DynamicEquation.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/RotationValues.cs30 var refBuf1_1 = value.PVA.Rotation.DynamicEquationMax.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/RotationValues.cs31 var refBuf1_2 = value.PVA.Rotation.DynamicEquationMin.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/RotationValues.cs32 var refBuf2_1 = value.PVA.Velocity.DynamicEquationMax.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/RotationValues.cs33 var refBuf2_2 = value.PVA.Velocity.DynamicEquationMin.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/RotationValues.cs34 var refBuf3_1 = value.PVA.Acceleration.DynamicEquationMax.Index.GetBytes();CODE
CRITICALDev/Editor/EffekseerCore/Binary/RotationValues.cs35 var refBuf3_2 = value.PVA.Acceleration.DynamicEquationMin.Index.GetBytes();CODE
Decorative Section Separators12 hits · 36 pts
SeverityFileLineSnippetContext
MEDIUMDev/Cpp/EffekseerRendererDX12/CMakeLists.txt29# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererDX12/CMakeLists.txt51# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererMetal/CMakeLists.txt36# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererMetal/CMakeLists.txt58# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererGL/CMakeLists.txt28# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererGL/CMakeLists.txt45# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererVulkan/CMakeLists.txt27# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererVulkan/CMakeLists.txt50# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererDX11/CMakeLists.txt29# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererDX11/CMakeLists.txt48# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererDX9/CMakeLists.txt28# --------------------COMMENT
MEDIUMDev/Cpp/EffekseerRendererDX9/CMakeLists.txt49# --------------------COMMENT
Slop Phrases13 hits · 28 pts
SeverityFileLineSnippetContext
MEDIUMdocs/QuickTutorial_Tool/QuickTutorial_en.html118As mentioned earlier, inheritance is a feature of this program. If for example, Node A is a parent of Node B, then everyCODE
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1027// Turns the current plot's plotting area into a drag and drop target. Don't forget to call EndDragDropTarget!COMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1029// Turns the current plot's X-axis into a drag and drop target. Don't forget to call EndDragDropTarget!COMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1031// Turns the current plot's legend into a drag and drop target. Don't forget to call EndDragDropTarget!COMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1039// Turns the current plot's plotting area into a drag and drop source. You must hold Ctrl. Don't forget to call EndDragDCOMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1041// Turns the current plot's X-axis into a drag and drop source. You must hold Ctrl. Don't forget to call EndDragDropSourCOMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1043// Turns an item in the current plot's legend into drag and drop source. Don't forget to call EndDragDropSource!COMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1097// Temporarily modify a style color. Don't forget to call PopStyleColor!COMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1103// Temporarily modify a style variable of float type. Don't forget to call PopStyleVar!COMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1105// Temporarily modify a style variable of int type. Don't forget to call PopStyleVar!COMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1107// Temporarily modify a style variable of ImVec2 type. Don't forget to call PopStyleVar!COMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1163// Temporarily switch to one of the built-in (i.e. ImPlotColormap_XXX) or user-added colormaps (i.e. a return value of ACOMMENT
LOWDev/Cpp/Viewer/3rdParty/imgui_addon/implot/implot.h1165// Push a colormap by string name. Use built-in names such as "Default", "Deep", "Jet", etc. or a string you provided toCOMMENT
AI Slop Vocabulary4 hits · 12 pts
SeverityFileLineSnippetContext
MEDIUM…p/EffekseerMaterialEditor/ThirdParty/tiny_obj_loader.h1159 // @todo { write more robust lexer and parser. }COMMENT
MEDIUM…ui_addon/imguinodegrapheditor/imguinodegrapheditor.cpp3102 // addLink(...) should be robust enough to handle NULL nodes, so we don't check it.COMMENT
MEDIUM…3rdParty/flatbuffers/include/flatbuffers/flatbuffers.h875// Essentially, this supports 2 std::vectors in a single buffer.COMMENT
MEDIUMTool/EffekseerResourceConverter/external/ufbx/ufbx.h4875 // Using this and robust linear interpolation will handle stepped tangents correctlyCOMMENT
Unused Imports11 hits · 11 pts
SeverityFileLineSnippetContext
LOWDev/release/resources/languages/compare_languages.py4CODE
LOWDev/Cpp/Test/Shaders/combine_gl.py2CODE
LOW…RendererMetal/EffekseerRendererMetal/combine_shader.py1CODE
LOW…RendererMetal/EffekseerRendererMetal/combine_shader.py2CODE
LOW…ekseerRendererGL/EffekseerRendererGL/combine_shader.py1CODE
LOW…ekseerRendererGL/EffekseerRendererGL/combine_shader.py2CODE
LOW…kseerRendererVulkan/EffekseerRendererVulkan/compile.py1CODE
LOW…kseerRendererVulkan/EffekseerRendererVulkan/compile.py2CODE
LOW…v/Cpp/TakeScreenshots/Scripts/generateTestResources.py2CODE
LOWDev/Unilities/test_python.py1CODE
LOWDev/Unilities/test_python.py2CODE
Deep Nesting10 hits · 10 pts
SeverityFileLineSnippetContext
LOWbuild.py132CODE
LOWbuild.py284CODE
LOWScript/Format_Cpp.py63CODE
LOWScript/Format_CMake.py21CODE
LOWScript/generate_screenshot_comparison.py550CODE
LOWScript/generate_screenshot_comparison.py676CODE
LOWDev/Cpp/CreateShader.py111CODE
LOW…kseerRendererWebGPU/EffekseerRendererWebGPU/compile.py101CODE
LOW…kseerRendererWebGPU/EffekseerRendererWebGPU/compile.py178CODE
LOWDev/Unilities/python/EfkEfcProperty.py61CODE
Hyper-Verbose Identifiers7 hits · 7 pts
SeverityFileLineSnippetContext
LOWbuild.py97def update_mac_bundle_version(plist_path, version):CODE
LOWScript/generate_screenshot_comparison.py259def write_pair_summary_report(output_dir, diff_rows):CODE
LOWScript/generate_screenshot_comparison.py367def write_backend_pair_summary_sheet(output_dir, summary_rows, backends, colors):CODE
LOWScript/generate_screenshot_comparison.py454def write_backend_pair_sheets(output_dir, diff_rows, colors, diff_boost):CODE
LOW…pp/Test/Runtime/browser/pre_effekseer_webgpu_player.js5function effekseerGetBrowserPlayerParams() {CODE
LOW…kseerRendererWebGPU/EffekseerRendererWebGPU/compile.py101def split_top_level_arguments(text):CODE
LOW…kseerRendererWebGPU/EffekseerRendererWebGPU/compile.py143def rewrite_texture_parameter_helpers(source):CODE
Excessive Try-Catch Wrapping5 hits · 7 pts
SeverityFileLineSnippetContext
LOWScript/test_screenshot.py58 except Exception as ex:CODE
MEDIUMScript/test_screenshot.py53def analyze_pixels(expected_path, actual_path):CODE
LOWScript/generate_screenshot_comparison.py78 except Exception:CODE
MEDIUMScript/generate_screenshot_comparison.py71def load_fonts():CODE
LOWDev/normalize_swig_outputs.py72 except Exception as exc: # noqa: BLE001CODE
TODO Padding1 hit · 2 pts
SeverityFileLineSnippetContext
LOW…3rdParty/flatbuffers/include/flatbuffers/flexbuffers.h127// TODO: implement proper support for 8/16bit floats, or decide not toCOMMENT
Verbosity Indicators1 hit · 2 pts
SeverityFileLineSnippetContext
LOW…fekseerResourceConverter/external/tinygltf/tiny_gltf.h7484 // TODO(syoyo): Do we need to check if `version` is greater or equal to 2.0?COMMENT
Structural Annotation Overuse1 hit · 2 pts
SeverityFileLineSnippetContext
LOWTool/EffekseerResourceConverter/external/ufbx/ufbx.h5418// NOTE: This function flips the normals if the determinant is negative.COMMENT