ldviz: parallel volume rendering drive

largedatavisualizationinitiative: parallel volume rendering drive: implementation

nsf-99 ©

test phases

phase 1: create simple application which produces texture map
returns:


	PVRClient v.0.5                        (all as an inventor file.)
	-  VLIVector3D hexagon[6] : 3d coordinates of hexagon in cammera space
	-  VLIVector2D texture[6] : 2d texture coordinates for corresponding hexagon
	-  int bpwidth, bpheight  : base plane (texture) width and height in pixels
	-  VLIPixel baseplane     : pixel array of size bpwidth x pbheight

phase 2: 3 cpu cluster, two image generators, one display

phase 3: 9 cpu cluster, eight image generators, one display

current stage: 8 cpu cluster, volume pro 500s

steps

0	load data segments
1	find viewport and image ordering
2	transmit info through sockets/mpi
3	render respective segment
4	load image in ram, and start Sepia interaction
5	merge 1st and 2nd image (according to ordering)
6	merge result and 3th image (according to ordering)
7	merge result and 4th image (according to ordering)
8	send resulting image to Display Node
9	load and warp image in 3D graphics card
10	display result
	go back to step 1

sample data

mouse embrio:
courtesy of russel jacobs and scott e fraser. volume rendering created VolView V.1.0 utilizing hardware volume rendering (RTViz' VolumePro 500).

vorticity field of compressible fluid simulation:
courtesy of ravi samtaney. rendering created VolView V.1.0 utilizing hardware volume rendering (RTViz' VolumePro 500).

sample 512 cube (artist rendition)