From 1cd844f0459df9d264c5552047af320b378df8ba Mon Sep 17 00:00:00 2001
From: Nao Pross <np@0hm.ch>
Date: Tue, 16 Aug 2022 17:16:27 +0200
Subject: kugel: Reorganize figures directory, add tikz spherical coordinates
 and flux

---
 buch/papers/kugel/images/curvgraph.m | 140 -----------------------------------
 1 file changed, 140 deletions(-)
 delete mode 100644 buch/papers/kugel/images/curvgraph.m

(limited to 'buch/papers/kugel/images/curvgraph.m')

diff --git a/buch/papers/kugel/images/curvgraph.m b/buch/papers/kugel/images/curvgraph.m
deleted file mode 100644
index 75effd6..0000000
--- a/buch/papers/kugel/images/curvgraph.m
+++ /dev/null
@@ -1,140 +0,0 @@
-#
-# curvature.m
-#
-# (c) 2022 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
-#
-
-global N;
-N = 10;
-
-global sigma2;
-sigma2 = 1;
-
-global s;
-s = 1.4;
-
-global cmax;
-cmax = 0.9;
-global cmin;
-cmin = -0.9;
-
-global Cmax;
-global Cmin;
-Cmax = 0;
-Cmin = 0;
-
-xmin = -3;
-xmax = 3;
-xsteps = 200;
-hx = (xmax - xmin) / xsteps;
-
-ymin = -2;
-ymax = 2;
-ysteps = 200;
-hy = (ymax - ymin) / ysteps;
-
-function retval = f0(r)
-	global sigma2;
-	retval = exp(-r^2/sigma2)/sqrt(sigma2) - exp(-r^2/(2*sigma2))/(sqrt(2*sigma2));
-end
-
-global N0;
-N0 = f0(0)
-N0 = 0.4;
-
-function retval = f1(x,y)
-	global N0;
-	retval = f0(hypot(x, y)) / N0;
-endfunction
-
-function retval = f(x, y)
-	global s;
-	retval = f1(x+s, y) - f1(x-s, y);
-endfunction
-
-function retval = curvature0(r)
-	global sigma2;
-	retval = (
-		-4*(sigma2-r^2)*exp(-r^2/sigma2)
-		+
-		(2*sigma2-r^2)*exp(-r^2/(2*sigma2))
-	) / (sigma2^(5/2));
-endfunction
-
-function retval = curvature1(x, y)
-	retval = curvature0(hypot(x, y));
-endfunction
-
-function retval = curvature(x, y)
-	global s;
-	retval = curvature1(x+s, y) - curvature1(x-s, y);
-endfunction
-
-function retval = farbe(x, y)
-	global Cmax;
-	global Cmin;
-	global cmax;
-	global cmin;
-	c = curvature(x, y);
-	if (c < Cmin) 
-		Cmin = c
-	endif
-	if (c > Cmax) 
-		Cmax = c
-	endif
-	u = (c - cmin) / (cmax - cmin);
-	if (u > 1)
-		u = 1;
-	endif
-	if (u < 0)
-		u = 0;
-	endif
-	color = [ u, 0.5, 1-u ];
-	color = color/max(color);
-	color(1,4) = c/2;
-	retval = color;
-endfunction
-
-function dreieck(fn, A, B, C)
-	fprintf(fn, "\ttriangle {\n");
-	fprintf(fn, "\t    <%.4f,%.4f,%.4f>,\n", A(1,1), A(1,3), A(1,2));
-	fprintf(fn, "\t    <%.4f,%.4f,%.4f>,\n", B(1,1), B(1,3), B(1,2));
-	fprintf(fn, "\t    <%.4f,%.4f,%.4f>\n",  C(1,1), C(1,3), C(1,2));
-	fprintf(fn, "\t}\n");
-endfunction
-
-function viereck(fn, punkte)
-	color = farbe(mean(punkte(:,1)), mean(punkte(:,2)));
-	fprintf(fn, "    mesh {\n");
-	dreieck(fn, punkte(1,:), punkte(2,:), punkte(3,:));
-	dreieck(fn, punkte(2,:), punkte(3,:), punkte(4,:));
-	fprintf(fn, "\tpigment { color rgb<%.4f,%.4f,%.4f> } // %.4f\n",
-		color(1,1), color(1,2), color(1,3), color(1,4));
-	fprintf(fn, "    }\n");
-endfunction
-
-fn = fopen("curvature.inc", "w");
-punkte = zeros(4,3);
-for ix = (0:xsteps-1)
-	x = xmin + ix * hx;
-	punkte(1,1) = x;      
-	punkte(2,1) = x;
-	punkte(3,1) = x + hx;
-	punkte(4,1) = x + hx;
-	for iy = (0:ysteps-1)
-		y = ymin + iy * hy;
-		punkte(1,2) = y;
-		punkte(2,2) = y + hy;
-		punkte(3,2) = y;
-		punkte(4,2) = y + hy;
-		for i = (1:4)
-			punkte(i,3) = f(punkte(i,1), punkte(i,2));
-		endfor
-		viereck(fn, punkte);
-	end
-end
-#fprintf(fn, "    finish { metallic specular 0.5 }\n");
-fclose(fn);
-
-printf("Cmax = %.4f\n", Cmax);
-printf("Cmin = %.4f\n", Cmin);
-- 
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