Annotation of /branches/vis12/bugs/resolved/bug009.diderot

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Revision 2685 - (view) (download)

1 :	glk	2176
2 :			int imgSize = 400;
3 :			real hh = 0.4; // step size of integration
4 :			int stepNum = 30; // take at most this many steps
5 :
6 :			// BUG or at least a strangeness in the how a syntax error is reported:
7 :	jhr	2193	// [bug009.diderot:9.10] Error: syntax error; try inserting "vec4"
8 :			//
9 :	glk	2176	// The function is missing the return type; why suggest vec4?
10 :	jhr	2193	//
11 :			// Because vec4 is a type and inserting it will fix the syntax error.
12 :			//
13 :	glk	2176	function align (vec2 vv, vec2 ref) = vv;
14 :
15 :			strand HLIC (real sign, vec2 pos0) {
16 :			vec2 lastdir = pos0;
17 :			vec2 pos = pos0;
18 :			vec2 step = [0.0,0.0];
19 :			output real out = 0.0;
20 :			real sum = 0.0;
21 :			int stepIdx = 0;
22 :			vec2 dir = [0.0,0.0];
23 :
24 :			update {
25 :			dir = align(pos, lastdir);
26 :			pos += hh*dir;
27 :			sum += |pos|;
28 :			stepIdx += 1;
29 :			lastdir = dir;
30 :			if (stepIdx == stepNum) {
31 :			stabilize;
32 :			}
33 :			}
34 :
35 :			stabilize {
36 :			out = sum;
37 :			}
38 :			}
39 :
40 :			initially [ HLIC(lerp(-1, 1, 0, si, 1),
41 :			[lerp(0.0, 81.0, -0.5, xi, imgSize-0.5),
42 :			lerp(0.0, 81.0, -0.5, yi, imgSize-0.5)])
43 :			| si in 0..1, yi in 0..imgSize-1, xi in 0..imgSize-1];

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