Real-Time Projection Shadow with Respect to Sun Position in Virtual Environments
This paper proposes a real-time software for outdoor rendering to control the shadows position with effect of sun\'s position. The position of sun plays an important rule for outdoor games. Calculation of sun\'s position, as a result, position and length of shadows require a lot of attention and preciseness. Julian dating is used to calculate the sun\'s position in the virtual dome. In addition, of computer graphics, building design is another field that this paper contributes on it. To create shadow, projection shadow is proposed. By calculating the sun\'s position in the specific date, time and location on the earth, shadow is generated. Length and angle of shadow are two parameters measured for building design and both of them are calculated in this real-time application. Therefore, it can be used for teachers to teach some part of physics about earth orbit and it can be used in building design and commercial games in virtual reality systems.
Keywords: real-time shadow, sun\'s position, sun light, projection shadow
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ABOUT THE AUTHORS
Hoshang Kolivand
Hoshang Kolivand received the B.S degree in Computer Science & Mathematic from Islamic Azad University, Iran in 1997, M.S degree in Application Mathematic and computer from Amirkabir University, Iran in 1999. He is now pursuing Ph.D in UTM ViCunelab under the guidance of Dr Mohd Shahrizal Bin Sunar. His research interests include Computer Graphics. Previously he was a lecturer in Shahid Beheshti University Iran. He has published enormous articles in international journals and conferences as well as national journals, conference proceedings and technical papers including article in a book. Hoshang Kolivand is an active reviewer of some conferences and international journals. He has published four books in object-oriented programming and one in mathematics.
Azam Amirshakarami
Azam Amirshakarami received the Associate Degree in Software Engineering (2002) from Islamic Azad University, Iran; BSc degree (2005) from Shariati University, Iran and MSc in Computer Science majoring in Computer Graphics (2010) from Universiti Teknologi Malaysia . She is Ph.D candidate since 2010 from Universiti Teknologi Malaysia under the supervision of Dr Mohd Shahrizal Bin Sunar. Her major field of study is improving real-time interaction in outdoor augmented reality. Prior to her current position, she managed the IT team at ISESCO regional office in Tehran beside other activities such as software developing and teaching software design and programming in C#, Java, Visual Basic. This year she is serving as a faculty member at a private
Mohd Shahrizal Sunar
Mohd Shahrizal Sunar received the BSc degree in Computer Science majoring in Computer Graphics (1999) from Universiti Teknologi Malaysia and MSc in Computer Graphics and Virtual Environment (2001) from The University of Hull, UK. In 2008, he obtained his PhD from National University of Malaysia. His major field of study is real-time and interactive computer graphics and virtual reality. He is the head of computer graphics and multimedia department, Faculty of Computer Science and Information System, Universiti Teknologi Malaysia since 1999. He had published numerous articles in international as well as national journals, conference proceedings and technical papers including article in magazines. Dr. Shahrizal is an active professional member of ACM SIGGRAPH. He is also a member Malaysian Society of Mathematics and Science.
Hoshang Kolivand
Hoshang Kolivand received the B.S degree in Computer Science & Mathematic from Islamic Azad University, Iran in 1997, M.S degree in Application Mathematic and computer from Amirkabir University, Iran in 1999. He is now pursuing Ph.D in UTM ViCunelab under the guidance of Dr Mohd Shahrizal Bin Sunar. His research interests include Computer Graphics. Previously he was a lecturer in Shahid Beheshti University Iran. He has published enormous articles in international journals and conferences as well as national journals, conference proceedings and technical papers including article in a book. Hoshang Kolivand is an active reviewer of some conferences and international journals. He has published four books in object-oriented programming and one in mathematics.
Azam Amirshakarami
Azam Amirshakarami received the Associate Degree in Software Engineering (2002) from Islamic Azad University, Iran; BSc degree (2005) from Shariati University, Iran and MSc in Computer Science majoring in Computer Graphics (2010) from Universiti Teknologi Malaysia . She is Ph.D candidate since 2010 from Universiti Teknologi Malaysia under the supervision of Dr Mohd Shahrizal Bin Sunar. Her major field of study is improving real-time interaction in outdoor augmented reality. Prior to her current position, she managed the IT team at ISESCO regional office in Tehran beside other activities such as software developing and teaching software design and programming in C#, Java, Visual Basic. This year she is serving as a faculty member at a private
Mohd Shahrizal Sunar
Mohd Shahrizal Sunar received the BSc degree in Computer Science majoring in Computer Graphics (1999) from Universiti Teknologi Malaysia and MSc in Computer Graphics and Virtual Environment (2001) from The University of Hull, UK. In 2008, he obtained his PhD from National University of Malaysia. His major field of study is real-time and interactive computer graphics and virtual reality. He is the head of computer graphics and multimedia department, Faculty of Computer Science and Information System, Universiti Teknologi Malaysia since 1999. He had published numerous articles in international as well as national journals, conference proceedings and technical papers including article in magazines. Dr. Shahrizal is an active professional member of ACM SIGGRAPH. He is also a member Malaysian Society of Mathematics and Science.
