Bibliographic Details
| Title: |
An Overview on Base Real-Time Shadow Techniques in Virtual Environments. |
| Authors: |
Kolivand, Hoshang1, Sunar, Mohd Shahrizal1 shahinkey@yahoo.com |
| Source: |
Telkomnika. 2012, Vol. 10 Issue 1, p171-178. 8p. 3 Color Photographs, 3 Diagrams, 1 Chart. |
| Subjects: |
Real-time computing software, Virtual reality, Algorithms, Radiosity, Digital image processing, Computer graphics, Ray tracing algorithms |
| Abstract (English): |
Shadows are elegant to create a realistic scene in virtual environments. Variety types of shadow techniques encourage us to prepare an overview on all base shadow techniques. Non real-time and realtime techniques are big subdivision of shadow generation. In non real-time techniques ray tracing, ray casting and radiosity are well known and deeply described. Radiosity implemented to create very realistic shadow on non real-time scene. Although traditional radiosity algorithm is difficult to implement, we have proposed a simple one. The proposed pseudo code is easier to understand and implement. Ray tracing used to prevent of collision of movement objects. Projection shadow, shadow volume and shadow mapping are used to create real-time shadow in virtual environments. We have used projection shadow for some objects are static and have shadow on flat surface. Shadow volume used to create accurate shadow with sharp outline. Shadow mapping that is the base of most recently techniques is reconstructed. The reconstruct algorithm gives some new idea to propose another algorithm based on shadow mapping. [ABSTRACT FROM AUTHOR] |
| Abstract (Indonesian): |
Bayangan (shadow) adalah sangat bagus untuk menciptakan suasana realistis pada lingkungan virtual. Bervariasinya teknik shadow mendorong Penulis untuk mempersiapkan tinjauan pada semua teknik shadow dasar. Teknik shadow dapat dikategorikan dua kelas besar, teknik waktu-nyata dan teknik non waktu-nyata. Pada jiplakan sinar teknik non waktu-nyata, pemilihan jiplakan dan radiositas adalah sangat dikenal, dan dijelaskan secara mendalam. Radiositas diterapkan untuk menciptakan bayangan yang sangat realistis pada teknik non waktu-nyata. Karena algoritma radiositas tradisional sulit diimplementasikan, Penulis mengusulkan sesuatu yang sederhana untuk menangani hal ini. Kode pseudo yang diusulkan lebih mudah untuk dipahami dan diimplementasikan. Jiplakan sinar digunakan untuk mencegah tabrakan objek-objek bergerak. Bayangan proyeksi, banyaknya bayangan dan pemetaan bayangan digunakan untuk membuat bayangan waktu-nyata pada lingkungan virtual. Bayangan proyeksi telah digunakan untuk beberapa objek statis dan memiliki bayangan pada permukaan datar. Banyaknya bayangan digunakan untuk membuat bayangan yang akurat dengan garis tajam. Pemetaan shadow yang merupakan teknik dasar dari semua teknik terkini, direkonstruksi. Algoritma rekonstruksi ini memberikan beberapa ide baru untuk mengusulkan algoritma lain berdasarkan pemetaan bayangan. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
