Exhibitions

Black Hole and Plasma Disc. This shows the horizon black hole (dark green/blue) with a transparent plasma disc.

Magnetic Field Lines. This shows the same system as the former, but now with the magnetic field lines added in the plasma disc. In addition we have added a little rotation to the whole system, which makes it possible to just sit tight in the middle of the field lines and see them pass by. This is done using dolly: pick a spot and dolly in until you pass through the isosurface and the field lines become clearer. Here's one without rotation:

Black Hole and Plasma Disc. Same show as the Inventor-file.

Magnetic Field Lines. Same show as the Inventor-file. To best see the disc, turn on Headlight under the View menu. Here's one without rotation:

start.pro	This file opens the original data file and 
		draws the necessary data from it. 
		It also sets a few parameters
 		like the time step and the size of the box.		 
 		
evolve.pro	This file makes the preliminaries for 
		the coming vizualization, and calls 'hyman' 
		and 'pde'.		


hyman.pro      	This file evolves the data set in time
		with the timestep given in the 'start' file.		 

pde.pro		This file is the one that calculates the 
		values for the data set in the new (r,,z)
		-coordinates that we need. This was done by 
		interpolating. At the same time it copies 
		the data set to higher and higher -values 
		so that a toroidal data set is formed.			 

felt.pro     	This file does three things. First of all 
		it creates the field lines so that they 
		can be vizualized. Secondly it checks
		for irregularities in the field lines. 
		And at last it colorizes the field lines. 
		
Result:		maglines.iv			

fkt.pro		This file draws a function that we want 
		to use for the plasma disc. In IDL it 
		looks like this: fkt.gif	
		 
plasma.pro	This file uses the function to assign a
		a value in each point of space, giving the 
		same values to points lying on the curve 
		that fkt.pro defines, and writes 
		the result to a lattice-file: disc.lat.
		
plasma.map	Now with the modules shown here in 
		Explorer, the isosurface, that will make 
		up for our plasma disk, is constructed:
		
		ReadLat reads the lattice-file.
		MinMax determines the minimum and
		maximum values of the lattice, used to
		assign min and max values to 
		IsosurfaceLat which creates the 
		isosurface. Smooth is turned on to make 
		the result more even and continous.
		Render then displays the result, and
		WriteGeom creates the resulting Inventor 
		file. 
		
		
Result:		plasma.iv

hole.iv		This file was written directly as an Inventor file.
		It is just a sphere compressed to 60% 
		in the z-direction

		
Result:		hole.iv