> For the complete documentation index, see [llms.txt](https://krjaeh0.gitbook.io/j-log/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://krjaeh0.gitbook.io/j-log/gamedev/gameplayprogrammer/shadergraph/01aboutshader.md).

# 01aboutShader

{% hint style="warning" %}
Switch to EXCALIDRAW VIEW in the MORE OPTIONS menu of this document to see the drawing. You can decompress drawing data with the command palette: "Decompress current Excalidraw file". For more info check in plugin settings under "Saving".
{% endhint %}

## Excalidraw Data

### 쉐이더란?

* GPU에서 실행되는 그래픽 처리 전용 코드
* 3D 모델의 표면에 적용할 시각적 효과를 결정
* 실시간 렌더링에 중요한 역할을 수행 (게임, 시뮬레이션 등)
* 외부 개발자가 만든 쉐이더 팩을 게임 리소스에 추가하여 기존 게임 그래픽보다 향상된 그래픽을 즐길 수 있음.
* 조명(해)의 각도에 따른 물의 반사, 인공 조명에 의한 그림자 등 실제 물리현상 기반의 사실적인 그래픽 처리 가능.

### 쉐이더의 종류

#### Vertex Shader

* 정점(Vertex)의 위치, 색상, 조명 등을 계산
* 주로 모델의 형태와 애니메이션 관련 처리

#### Fragment Shader (Pixel Shader)

* 각 픽셀의 색상을 계산
* 주로 텍스처, 라이트, 그림자, 반사 등 시각 효과 담당

#### Geometry Shader

* 정점 사이에 새로운 기하 구조 생성
* 예: 실시간 실루엣, 아웃라인 등

#### Compute Shader

* 그래픽 파이프라인 외에서 병렬 연산 수행
* 예: 물리 계산, 파티클 시뮬레이션, AI 처리 등

#### Tessellation Shader

* 정점을 더 촘촘하게 세분화
* 고해상도 곡면 표현에 사용 (캐릭터 얼굴 등)

### 쉐이더 언어

* HLSL (High-Level Shading Language)
* GLSL (OpenGL Shading Language)
* Cg (C for Graphics)
* ShaderLab + HLSL/GLSL

### 플랫폼 / API

* DirectX (Windows 중심)
* OpenGL, WebGL (크로스 플랫폼)
* Nvidia (하드웨어/도구 관련)

### Unity 엔진 쉐이더 포맷

* Custom Shader (HLSL 직접 작성)
* Surface Shader (Unity 전용 래퍼)
* Shader Graph (노드 기반 비주얼 툴)

### 리소스

* <https://learn.unity.com/search/?k=%5B%22q%3Ashader%22%5D>
* <https://thebookofshaders.com/>
* <https://catlikecoding.com/unity/tutorials/rendering/>
* <https://youtu.be/KnueAgpUL3Y?si=V92O9PHGQTccBANf>

### Embedded Files

!\[Pasted Image]\(topics/assets/images/Pasted Image 20250611154141\_378.png)

### Drawing (compressed-json)

{% code title="drawing.excalidraw\.json" %}

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```

{% endcode %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://krjaeh0.gitbook.io/j-log/gamedev/gameplayprogrammer/shadergraph/01aboutshader.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
