Real-time Shadows in CG
نویسنده
چکیده
This work should give an overview of various shadow techniques used in real-time rendering. Proper shadows are a crucial part of realistic looking scenes and therefore a huge research field in computer graphics. We will focus on the two major shadowing techniques shadow volumes and shadow mapping, including most popular rendering approaches, whereby the most practical approaches should be pointed out. Moreover, the difficulties and problems of them will be discussed, followed by a summarization and comparison.
منابع مشابه
Real - Time Superimposing a Photo - Realistic Virtual Object onto a Real Movie
When people superimpose a virtual object painted by CG on the photograph of taking the place where there are no object, they often make up shadows, and put it on a suitable place by their sense of perception. However, we can’t obtain truly the real image by using its method. Therefore, in order to remove these ambiguity, our paper describes a method of making shadows by using a fish-eye image, ...
متن کاملA Real-Time Soft Shadow Volume Algorithm
Rendering of shadows is a very important ingredient in three-dimensional graphics since they increase the level of realism and provide cues to spatial relationships. Area or volumetric light sources give rise to so called soft shadows, i.e., there is a smooth transition from no shadow to full shadow. For hard shadows, which are generated by point light sources, the transition is abrupt. Since a...
متن کاملGeometry of Real Time Shadows Geometry of Real Time Shadows
Shadows provide important visual hints about the spatial relationship between objects. Shadow volumes are one way to generate sophisticated shadows for use in real time environments. This paper focuses on the geometric aspects which are involved in the creation of the shadow volume. Speed up techniques like shaders and dual space approaches for silhouette determination are discussed. Finally th...
متن کاملEfficient Generation of Soft Shadow Textures
Soft shadows give important cues of realism to 3D scenes. Existing methods can produce hard shadows in real time and soft shadows in minutes to hours per frame. Here a technique for producing accurate soft shadows quickly in software is presented, allowing soft shadow texture maps to be computed for simple scenes on commodity hardware in real time.
متن کاملAutomatic generation of consistent shadows for augmented reality
In the context of mixed reality, it is difficult to simulate shadow interaction between real and virtual objects when only an approximate geometry of the real scene and the light source is known. In this paper, we present a realtime rendering solution to simulate colour-consistent virtual shadows in a real scene. The rendering consists of a three-step mechanism: shadow detection, shadow protect...
متن کامل