Diff of /trunk/doc/report/vr-lite.tex

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	revision 370, Sat Oct 2 17:19:14 2010 UTC	revision 371, Sat Oct 2 17:20:27 2010 UTC
#	Line 5	Line 5
5	input vec3 orig;                // location of pixel (0,0)	input vec3 orig;                // location of pixel (0,0)
6	input vec3 cVec;                // vector between pixels horizontally	input vec3 cVec;                // vector between pixels horizontally
7	input vec3 rVec;                // vector between pixels vertically	input vec3 rVec;                // vector between pixels vertically
8	input real valOpacMin;          // highest value with opacity 0.0	input real opacMin;             // highest value with opacity 0.0
9	input real valOpacMax;          // lowest value with opacity 1.0	input real opacMax;             // lowest value with opacity 1.0
10
11	image(3)[] img = load (dataFile);	image(3)[] img = load (dataFile);
12	field#1(3)[] F = convolve (bspln3, img);	field#1(3)[] F = img $\circledast$ bspln3;
13
14	actor RayCast (int row, int col)	actor RayCast (int row, int col)
15	{	{
#	Line 26	Line 26
26	real val = F@pos;	real val = F@pos;
27	vec3 grad = ($\nabla$ F)@pos;	vec3 grad = ($\nabla$ F)@pos;
28	vec3 norm = -grad/|grad|;	vec3 norm = -grad/|grad|;
29	if (val > valOpacMin) {  // we have some opacity	if (val > opacMin) {  // we have some opacity
30	real opac = 0.0;     // dummy initialization	real opac = 1.0 if (val > opacMax)
31	if (val > valOpacMax) opac = 1.0;	else (val - opacMin)/(opacMax - opacMin);
32	else opac = (val - valOpacMin)/(valOpacMax - valOpacMin);	gray = gray + transp*opac*max(0.0, -dir $\cdot$ norm);
	gray = gray + transp*opac*max(0.0, dot(-dir,norm));
33	transp = transp*(1.0 - opac);	transp = transp*(1.0 - opac);
34	}	}
35	}	}
#	Line 38	Line 37
37	transp = 0.0;	transp = 0.0;
38	stabilize;	stabilize;
39	}	}
40	else if (t > 40.0) {	else if (t > 40.0)
41	stabilize;	stabilize;
	}
42	t = t + stepSz;	t = t + stepSz;
43	}	}
44

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Legend: Removed from v.370   changed lines   Added in v.371

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