• This project is for personal learning and resume/portfolio purposes only.
• The source code was written/recreated by me as a learning exercise, based on course materials.
• It is not for commercial use, and the original content is not distributed.
• It serves as an example for learning C++, OpenGL programing.
• It only include cpp and GLSL source code.
• 本项目仅供个人学习和简历展示使用
• 源代码是我自己根据课程内容练习学习编写/复现完成
• 不用于商业用途，也不对外传播原始内容
• 学习 c++ 编程与计算机图形学的示例
• 项目只上传了cpp代码和shader的GLSL代码

OpenGL Real-Time Rendering Demo

Overview: This project is a real-time 3D rendering demo built with C++17 and Modern OpenGL (Core Profile). It implements a complete rendering pipeline, including window management, camera system, lighting and shadows, skybox, and model loading. It serves as a personal portfolio project to demonstrate proficiency in computer graphics, rendering pipeline design, and modern OpenGL programming.

Rendering Architecture: Forward Rendering pipeline built with GLEW + GLFW + GLM. Includes multiple passes (shadow mapping + main rendering).

Window & Input System: Custom Window class manages OpenGL context and mouse/keyboard input, supporting free camera movement and rotation.

Camera System: FPS-style camera based on glm::lookAt, controlled via WASD + mouse movement Lighting System: Supports Directional, Point, and Spot Lights — each managed via uniform buffer control in shaders

Shadow Mapping:

• Directional Light: standard 2D depth map shadows.
• Point/Spot Light: omnidirectional shadows using cube map depth textures

Mesh & Model Loading: Supports .obj model loading through Model and Mesh abstraction layers

Materials & Textures: Custom Material + Texture system with diffuse/specular maps and reflection control

Skybox: Implements cube map rendering for a realistic 360° environmental background

Animated Models: Models (e.g., helicopters) can rotate dynamically to simulate motion Normal Calculation: Implements vertex smoothing via calcAverageNormals() for smooth shading

Technical Highlights:

• Written in C++17 using OpenGL 4.6 Core Profile
• Multi-shader management system (Scene + Shadow shaders)
• Shadow rendering via Frame Buffer Objects (FBO)
• All math handled with GLM (matrix, vector, quaternion operations)
• Modular OOP architecture with dedicated classes for Shader, Camera, Light, Texture, and Model
• Supports multiple dynamic light sources with shadows

[1] Shadow Map Pass

├── DirectionalShadowMapPass() → render depth map for directional lights

└── OmniShadowMapPass() → render cube depth maps for point/spot lights

[2] Main Render Pass

├── Render skybox

├── Bind shadow maps to texture units

└── Render all meshes/models with lighting and materials

Technology Stack

• Language: C++17
• Graphics API: OpenGL 4.x Core
• Libraries Used:
• GLEW – OpenGL extension loader
• GLFW – window & input management
• GLM – math library
• stb_image – texture loading
• Assimp – model importing

项目简介: 本项目是一个基于 C++17 + Modern OpenGL (Core Profile) 的实时三维渲染 Demo，完整实现了从窗口初始化、相机控制、光照与阴影系统到天空盒与模型加载的完整渲染流程。 支持 平行光阴影映射、点光/聚光全向阴影映射、PBR风格材质反射、以及 动态相机与模型动画

渲染架构 : 使用 "Forward Rendering" 管线，基于 GLEW + GLFW + GLM 实现；每帧执行多通道渲染（阴影 Pass + 主渲染 Pass）。

窗口与输入系统 : 封装 Window 类管理 OpenGL 上下文、输入事件（键鼠控制），支持相机自由移动与视角旋转。

相机系统 : 基于 glm::lookAt 实现第一人称相机，支持 WASD + 鼠标控制视角，实时更新 View 矩阵。

光照系统 : 实现三类光源：DirectionalLight / PointLight / SpotLight；每类光源拥有独立 Shader Uniform 管理。

阴影映射 (Shadow Mapping) : Directional Light: 深度贴图阴影; Point/Spot Light: 使用立方体深度贴图 (CubeMap Depth) 实现全向阴影。

Mesh & Model 加载 : 支持 .obj 模型加载 (Model 类)，并可通过 Mesh 类统一渲染接口。

材质与纹理 : 基于 Texture + Material 类实现漫反射 / 镜面反射控制，可加载 RGBA 纹理贴图。

天空盒 (Skybox) : 使用 CubeMap 实现 360° 环境贴图，提供逼真的背景环境光照。

动态模型动画 : 模型（如直升机）支持绕轴旋转动画，实现基础场景动态效果。

法线计算 : 实现顶点平均法线计算函数 calcAverageNormals()，支持光滑着色 (smooth shading)。

使用 现代 OpenGL Core Profile (GL 4.6) 编程接口；

• 实现了 多 Shader 管理系统（主场景 + 阴影 Shader）；
• 使用 Frame Buffer Object (FBO) 渲染阴影贴图；
• 基于 glm 完成所有矩阵/向量数学运算；
• 实现自定义相机类与光源类；
• 支持 多光源组合照明 与 实时阴影更新；
• 模块化 C++ 设计（独立类文件：Shader, Mesh, Camera, Light, Texture, Model 等）