The using of the bge to explore lost worlds

Transcription

1 blender and virtual archaeology The using of the bge to explore lost worlds Daniel Tejerina Antón Javier Esclapés Jover

2 The Cova del Barranc del Migdia is an important prehistoric archaeological site in Southeast Spain, where archaeologists have found several multiple burials with their own grave goods, and an important set of rock paintings. This site has been declared World Heritage Site by Unesco. 1

3 Northern access Southern access 2

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5 accesibility understanding the site The cave is among the rocks of the mountains and the cave is only reachable by climbing. Prehistoric archaeological sites show more complexity c o m p a r e d t o o t h e r archaeological sites (greek, roman...) The interior of the cave is formed by very narrow galleries Very few people understand this archaeological site Very few people can visit the site 24

6 Virtualization process Phase I Phase II Phase III Phase IV photographic documentation 3d model generation from photos using digital photogrammetry design of a virtual walkthrough with the bge executable creation, game testing and web publishing 25

7 Photogrammetry for scientific purposes. What we need 1.A workstation equipped with digital photogrammetry software (cloud based or not) 2.A High resolution digital camera (previously calibrated) 3.Good quality photos of the object to document 4.Good exposure values (camera in manual mode and tripod to avoid trepidation) 5.Good overlap between each pair of photos 6.Topographic support 6

8 Photographic documentation 3500 photos of the whole archaeological site This is the most time-consuming phase 7

9 High resolution resulting mesh axonometric projection 8

10 elevation plant 9

11 Blender 1.Geometry 1.1. obj import 1.2. mesh decimation 1.3. texture and normal baking 2. Physics 2.1. Collision bounds 3. Movement 4. Illumination 5.Game Logic 6.Menu and help screens 7.Music 10

12 original mesh copy (decimated) mesh + texture map = normal map 11 mesh ready to be used in the bge

13 illumination testing examples of different light sources and parameters 12

14 illumination testing a spot light parented to the camera was used to illuminate the cave. energy: 1.000; spot shape blend value:

15 Fragment ceràmic / fragmento cerámico / pottery fragment Fragment de cos de d un vas ceràmic. Ambdues superfícies allisades. Decoració pintada en superfície exterior. Atès que ens trobem en un jaciment amb una funcionalitat religiosa, les restes ceràmiques trobades estan relacionats amb les ofrenes funeràries que acompanyarien al difunt durant el seu últim viatge, encara que és possible que també tinguessin un ús determinat durant el ritual d'inhumació. select your language valencià castellano english Fragmento de cuerpo de un vaso cerámico. Ambas superficies alisadas. Decoración pintada en superficie exterior. Dado que nos encontramos en un yacimiento con una funcionalidad religiosa, los restos cerámicos hallados están relacionados con las ofrendas funerarias que acompañarían al difunto durante su último viaje, aunque es posible que también tuvieran un uso determinado durante el ritual de inhumación. Fragment of a ceramic object. Both surfaces smoothed. Painted decoration on exterior surface. Since we are in a place with a religious function, the ceramic remains found are related to funerary offerings to accompany the deceased during his last trip, although it may also have a particular use for the burial ritual. salir por favor, escoge una opción la Cova del Barranc del Migdia paseo virtual exploración de objetos en 3D créditos 14 a few examples of different screens used in the game

16 select your language valencià castellano english 15

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18 music and sounds were downloaded from freesound ( 17

19 The game logic 18 the splash screen logic

20 conclusions Game engines are quickly becoming basic tools for visualization of cultural heritage. It allows users to explore objects and archaeological sites in a much more interactive way The particularity of the blender game engine, appart from offering the possibility of performing all phases from modeling or lighting to animation, is that it allows any amateur user to develop a visualization tool without programming a single line, using only logic bricks. Students of archeology at the University of Alicante are learning to use this powerful tool to create, quickly and easily, an interactive database that includes all previously scanned objects and sites. 18