Real-time Shadow Generation for 3D simulations using modern hardware

نویسنده

  • Maarten van Sambeek
چکیده

Shadows are important to create realism in 3D Simulations. They give extra information about spatial relationships of objects and they add to the overal atmosphere. Several techniques to create shadows exist, each with their advantages and disadvantages. Modern graphics hardware can process more graphics data than every in real time. Shadow algorithms that required preprocessing or could not be used in real-time now be implemented efficiently using the modern GPUs. With the new geometry shader, processing of polygons can be moved from the CPU to the GPU. In this thesis real-time shadow generation using the Re-lion Renderer2 engine is presented. Several existing techniques have been adapted to make use of the capabilities of modern graphics hardware. These techniques have been implemented in a demo framework in the form of a shader library. To compare the performance and quality of the techniques, they were evaluated and compared in the areas of performance, shadow quality and memory usage. Finally, recommendations are made to select the right shadow technique for the right situation.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Efficient 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 کامل

Shadow Mapping for Hemispherical and Omnidirectional Light Sources

In this paper we present a shadow mapping technique for hemispherical and omnidirectional light sources using dual-paraboloid mapping. In contrast to the traditional perspective projection this parameterization has the benefit that only a minimal number of rendering passes is needed during generation of the shadow maps, making the method suitable for dynamic environments and real time applicati...

متن کامل

Approximate Soft Shadows on Arbitrary Surfaces using Penumbra Wedges

Shadow generation has been subject to serious investigation in computer graphics, and many clever algorithms have been suggested. However, previous algorithms cannot render high quality soft shadows onto arbitrary, animated objects in real time. Pursuing this goal, we present a new soft shadow algorithm that extends the standard shadow volume algorithm by replacing each shadow quadrilateral wit...

متن کامل

Low-cost Real-time Sar Simulation for Applications in Mission Planning, Education and Information Extraction

SAR simulators are important for a huge variety of applications. Realistic SAR simulations need realistic 3D models, which are often not available. Less realistic models can be used in the less accurate real-time simulation approach. Using modern graphic cards for SAR simulation even complex environments can be simulated in real-time. This is realised by implementing of SAR geometry and radiome...

متن کامل

Approximate Soft Shadows

Shadow generation has been subject to serious investigation in computer graphics, and many clever algorithms have been suggested. However, previous algorithms cannot render high quality soft shadows onto arbitrary, animated objects in real time. Pursuing this goal, we present a new soft shadow algorithm that extends the standard shadow volume algorithm by replacing each shadow quadrilateral wit...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2007