Скачать или смотреть What is Ray Tracing?

Ray tracing is a computer graphics technique used to simulate the way that light interacts with objects in a virtual 3D environment. It is a rendering method that traces the path of light rays as they travel through the scene, interacting with surfaces and objects, and simulates how they are reflected, refracted, and absorbed.

Key concepts and features of ray tracing include:
1. Light Rays: In ray tracing, virtual rays of light are simulated as they travel from the virtual camera or light source through the scene. These rays are traced to determine how they interact with objects and surfaces.
2. Reflection: When a ray of light hits a surface, it can be reflected in accordance with the laws of reflection. Ray tracing calculates the direction of the reflected ray based on the angle of incidence.
3. Refraction: When a ray of light passes from one material to another with a different refractive index, it can be bent or refracted. Ray tracing calculates the direction of the refracted ray using the principles of refraction.
4. Shadows: Ray tracing can accurately simulate shadows cast by objects in a scene. Rays of light that are blocked by other objects are not traced beyond the blocking object, resulting in realistic shadow effects.
5. Global Illumination: Ray tracing can simulate global illumination effects, including indirect lighting and ambient occlusion, which contribute to more realistic and visually appealing scenes.
6. Materials and Shading: Ray tracing can simulate different material properties, such as reflection, transparency, and diffuseness. It can accurately model complex material interactions, such as glossy reflections and transparent surfaces.
7. Realism: Ray tracing is known for its ability to produce highly realistic images with accurate lighting and shadows. It is often used in fields like film and visual effects where realism is a top priority.
8. Computational Intensity: Ray tracing is computationally intensive, requiring significant processing power to calculate the interactions of individual rays. Real-time ray tracing, where images are rendered in real time for video games or interactive applications, has become more feasible with advancements in hardware and optimization techniques.

Ray tracing has been a fundamental technique in computer graphics for producing high-quality images in fields like visual effects, architecture, product design, and animation. It has gained particular attention in recent years with the advent of hardware acceleration and real-time ray tracing capabilities in graphics processing units (GPUs), enabling more immersive and visually stunning experiences in video games and interactive applications.

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