asdlei99 / limitless-engine

OpenGL C++ Graphics Engine

The project is 3D graphics engine, focused on high-performance, low-overhead rendering with modern OpenGL & C++17.

Lighting

• Forward/Deferred shading
• Dynamic directional light
• Dynamic point lights
• Dynamic spot lights
• Directional Cascade Shadow maps
• Percentage-Closer Filtering
• Skybox

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Material System

Material Properties:

• Сolor
• Albedo texture
• Normal map
• Emissive color
• Emissive mask
• Blend mask
• Refraction
• Ambient occlusion
• Transparency: Translucent, Additive, Modulate
• Shading: Lit, Unlit
• Metallic & roughness workflow
• Material layering
• Custom materials via GLSL snippets that allow you to create whatever material you want
• All properties are run-time changeable

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Effect System

• Sprite / Mesh / Beam emitters
• 'initial' & 'by life' modules, const & range value distributions
• Interoperation with material custom properties
• Color, location, velocity, acceleration, size, lifetime, mesh location, mesh attachment, rotation, rotation rate, custom material, beam targets & speed & offset & rebuild & displacement

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Model Loading

• Model loading using Assimp
• Skeletal models with animations
• Instancing support

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Core Features

• OpenGL state caching for reducing driver overhead
• Multithreaded OpenGL context resource sharing
• ShaderCompiler & ShaderProgram introspection
• Indexed buffers automatic binding to location
• Textures automatic binding to texture units
• Texture Compression formats support
• Buffer data streaming: Orphaning, Unsynchonized, Persistent, Coherent, TrippleBuffering, Explicit synchronization
• Supports GL_ARB_buffer_storage for immutable buffers
• Supports GL_ARB_texture_storage for immutable textures
• Supports GL_ARB_direct_state_access for VertexArrays, BufferObjects, Textures, etc
• Supports GL_ARB_bindless_texture for bindless textures
• Supports GL_ARB_shader_storage_buffer_object for large blocks in shaders

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PostProcessing

• Tone mapping
• Gamma correction
• Bloom
• Vignette
• Tone shading
• FXAA
• SSAO

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Text rendering using FreeType

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Content

Build

The project uses C++17 and CMake's find_package for dependencies.

Dependencies

• glfw3
• glew
• OpenGL
• glm
• assimp
• stb_image
• stb_image_resize
• freetype