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(applying) 2132 5964 w
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(power) 2157 6084 w
(scale) 2444 6084 w
(of) 2681 6084 w
(0.5) 2802 6084 w
(takes) 2965 6084 w
(the) 3208 6084 w
(square) 3368 6084 w
(root) 3666 6084 w
(of) 3865 6084 w
(the) 3986 6084 w
(numbers) 4146 6084 w
(in) 4528 6084 w
(the) 4644 6084 w
(mesh,) 4804 6084 w
(while) 720 6204 w
(a) 968 6204 w
(power) 1038 6204 w
(scale) 1313 6204 w
(of) 1538 6204 w
(3) 1647 6204 w
(replaces) 1723 6204 w
(the) 2075 6204 w
(numbers) 2223 6204 w
(in) 2593 6204 w
(the) 2697 6204 w
(mesh) 2845 6204 w
(with) 3082 6204 w
(their) 3286 6204 w
(cubes.) 3495 6204 w
(Power) 3798 6204 w
(law) 4079 6204 w
(scaling is best envi\255) 4249 6204 w
(sioned) 720 6324 w
(by) 1012 6324 w
(thinking) 1143 6324 w
(of) 1508 6324 w
(the) 1622 6324 w
(data) 1775 6324 w
(as) 1972 6324 w
(representing) 2086 6324 w
(the) 2610 6324 w
(elevation) 2763 6324 w
(of) 3160 6324 w
(terrain;) 3274 6324 w
(powers) 3593 6324 w
(less) 3912 6324 w
(than) 4093 6324 w
(1) 4296 6324 w
(yield) 4377 6324 w
(landscapes) 4608 6324 w
(with) 720 6444 w
(vertical) 926 6444 w
(scarps) 1253 6444 w
(that) 1530 6444 w
(look) 1708 6444 w
(like) 1914 6444 w
(glacially\255carved) 2092 6444 w
(valleys;) 2762 6444 w
(powers) 3101 6444 w
(greater) 3416 6444 w
(than) 3719 6444 w
(one) 3918 6444 w
(make) 4089 6444 w
(fairy\255castle) 4332 6444 w
(spires) 4807 6444 w
(\(which require large mesh sizes and high resolution for best results\).) 720 6564 w
(After) 720 6720 w
(these) 963 6720 w
(calculations,) 1201 6720 w
(we) 1736 6720 w
(have) 1885 6720 w
(a) 2106 6720 w
(array) 2183 6720 w
(of) 2420 6720 w
(the) 2536 6720 w
(specified) 2691 6720 w
(size) 3084 6720 w
(containing) 3272 6720 w
(numbers) 3727 6720 w
(that) 4104 6720 w
(range) 4287 6720 w
(from) 4541 6720 w
(0) 4769 6720 w
(to) 4853 6720 w
(1.) 4965 6720 w
(The pixmaps are generated as follows:) 720 6840 w
10 /Times-Bold f
(Clouds) 970 6996 w
10 /Times-Roman f
(A) 1271 6996 w
(color) 1369 6996 w
(map) 1600 6996 w
(is) 1798 6996 w
(created) 1891 6996 w
(that) 2204 6996 w
(ranges) 2381 6996 w
(from) 2668 6996 w
(pure) 2889 6996 w
(blue) 3093 6996 w
(to) 3292 6996 w
(white) 3397 6996 w
(by) 3646 6996 w
(increasing) 3773 6996 w
(admixture) 4210 6996 w
(\(desatura\255) 4642 6996 w
(tion\)) 1220 7116 w
(of) 1436 7116 w
(blue) 1546 7116 w
(with) 1745 7116 w
(white.) 1950 7116 w
(Numbers) 2249 7116 w
(less) 2642 7116 w
(than) 2819 7116 w
(0.5) 3018 7116 w
(are) 3170 7116 w
(colored) 3318 7116 w
(blue,) 3643 7116 w
(numbers) 3866 7116 w
(between) 4236 7116 w
(0.5) 4594 7116 w
(and) 4745 7116 w
(1.0) 4915 7116 w
(are colored with corresponding levels of white, with 1.0 being pure white.) 1220 7236 w
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10 /Times-Roman f
(\255 2 \255) 2797 480 w
10 /Times-Bold f
(Planet) 970 840 w
10 /Times-Roman f
(The) 1242 840 w
(mesh) 1437 840 w
(is) 1688 840 w
(projected) 1795 840 w
(onto) 2206 840 w
(a) 2424 840 w
(sphere.) 2508 840 w
(Values) 2858 840 w
(less) 3175 840 w
(than) 3365 840 w
(0.5) 3577 840 w
(are) 3742 840 w
(treated) 3903 840 w
(as) 4214 840 w
(water) 4338 840 w
(and) 4600 840 w
(values) 4785 840 w
(between) 1220 960 w
(0.5) 1579 960 w
(and) 1731 960 w
(1.0) 1902 960 w
(as) 2054 960 w
(land.) 2164 960 w
(The) 2413 960 w
(water) 2595 960 w
(areas) 2843 960 w
(are) 3074 960 w
(colored) 3222 960 w
(based) 3548 960 w
(upon) 3802 960 w
(the) 4029 960 w
(water) 4178 960 w
(depth,) 4425 960 w
(and) 4698 960 w
(land) 4868 960 w
(based) 1220 1080 w
(on) 1479 1080 w
(its) 1611 1080 w
(elevation.) 1738 1080 w
(The) 2186 1080 w
(random) 2373 1080 w
(depth) 2710 1080 w
(data) 2964 1080 w
(are) 3162 1080 w
(used) 3315 1080 w
(to) 3530 1080 w
(create) 3640 1080 w
(clouds) 3909 1080 w
(over) 4202 1080 w
(the) 4411 1080 w
(oceans.) 4565 1080 w
(An) 4918 1080 w
(atmosphere) 1220 1200 w
(approximately) 1706 1200 w
(like) 2309 1200 w
(the) 2485 1200 w
(Earth's) 2633 1200 w
(is) 2947 1200 w
(simulated;) 3040 1200 w
(its) 3483 1200 w
(light) 3604 1200 w
(absorption) 3814 1200 w
(is calculated to cre\255) 4262 1200 w
(ate a blue cast around the limb) 1220 1320 w
(of) 2466 1320 w
(the) 2575 1320 w
(planet.) 2723 1320 w
(A) 3043 1320 w
(function) 3141 1320 w
(that) 3500 1320 w
(rises) 3676 1320 w
(from) 3885 1320 w
(0) 4105 1320 w
(to) 4181 1320 w
(1) 4285 1320 w
(based) 4361 1320 w
(on) 4614 1320 w
(latitude) 4740 1320 w
(is) 1220 1440 w
(modulated) 1317 1440 w
(by) 1769 1440 w
(the) 1899 1440 w
(local) 2051 1440 w
(elevation) 2275 1440 w
(to) 2671 1440 w
(generate) 2778 1440 w
(polar) 3144 1440 w
(ice) 3378 1440 w
(caps\255\255high) 3523 1440 w
(altitude) 3973 1440 w
(terrain) 4302 1440 w
(carries) 4591 1440 w
(gla\255) 4885 1440 w
(ciers) 1220 1560 w
(farther) 1439 1560 w
(from) 1735 1560 w
(the) 1960 1560 w
(pole.) 2114 1560 w
(Based) 2368 1560 w
(on) 2644 1560 w
(the) 2776 1560 w
(position) 2930 1560 w
(of) 3285 1560 w
(the) 3400 1560 w
(star) 3554 1560 w
(with) 3730 1560 w
(respect) 3940 1560 w
(to) 4254 1560 w
(the) 4364 1560 w
(observer,) 4518 1560 w
(the) 4918 1560 w
(apparent) 1220 1680 w
(color) 1590 1680 w
(of) 1822 1680 w
(each) 1932 1680 w
(pixel) 2141 1680 w
(of) 2367 1680 w
(the) 2476 1680 w
(planet) 2624 1680 w
(is) 2894 1680 w
(calculated) 2987 1680 w
(by) 3417 1680 w
(ray\255tracing) 3543 1680 w
(from) 4006 1680 w
(the) 4226 1680 w
(star) 4374 1680 w
(to) 4544 1680 w
(the) 4648 1680 w
(planet) 4796 1680 w
(to) 1220 1800 w
(the) 1334 1800 w
(observer) 1492 1800 w
(and) 1871 1800 w
(applying) 2051 1800 w
(a) 2437 1800 w
(lighting) 2517 1800 w
(model) 2866 1800 w
(that) 3153 1800 w
(sums) 3340 1800 w
(ambient) 3583 1800 w
(light) 3942 1800 w
(and) 4163 1800 w
(diffuse) 4344 1800 w
(reflection) 4658 1800 w
(\(for) 1220 1920 w
(most) 1397 1920 w
(planets) 1620 1920 w
(ambient) 1931 1920 w
(light) 2281 1920 w
(is) 2493 1920 w
(zero,) 2588 1920 w
(as) 2812 1920 w
(their) 2923 1920 w
(primary) 3133 1920 w
(star) 3476 1920 w
(is) 3647 1920 w
(the) 3741 1920 w
(only) 3890 1920 w
(source) 4095 1920 w
(of) 4382 1920 w
(illumination\).) 4492 1920 w
(Additional random data are used to generate stars around the planet.) 1220 2040 w
10 /Times-Bold f
(Night) 970 2196 w
10 /Times-Roman f
(A sequence of pseudorandom numbers is used to generate stars with a user specified density.) 1220 2196 w
(Cloud) 720 2352 w
(pictures) 1001 2352 w
(always) 1353 2352 w
(contain) 1666 2352 w
(256) 1996 2352 w
(or) 2182 2352 w
(fewer) 2301 2352 w
(colors) 2563 2352 w
(and) 2843 2352 w
(may) 3023 2352 w
(be) 3231 2352 w
(displayed) 3361 2352 w
(on) 3780 2352 w
(most) 3916 2352 w
(color) 4147 2352 w
(mapped) 4388 2352 w
(devices) 4741 2352 w
(without) 720 2472 w
(further) 1059 2472 w
(processing.) 1363 2472 w
(Planet) 1873 2472 w
(pictures) 2156 2472 w
(often) 2505 2472 w
(contain) 2743 2472 w
(tens) 3070 2472 w
(of) 3264 2472 w
(thousands) 3380 2472 w
(of) 3813 2472 w
(colors) 3929 2472 w
(which) 4206 2472 w
(must) 4482 2472 w
(be) 4709 2472 w
(com\255) 4835 2472 w
(pressed) 720 2592 w
(with) 1045 2592 w
10 /Times-Bold f
(pnmquant) 1249 2592 w
10 /Times-Roman f
(or) 1721 2592 w
10 /Times-Bold f
(ppmdither) 1831 2592 w
10 /Times-Roman f
(before) 2314 2592 w
(encoding) 2595 2592 w
(in) 2988 2592 w
(a) 3093 2592 w
(color) 3164 2592 w
(mapped) 3396 2592 w
(format.) 3739 2592 w
(If) 4082 2592 w
(the) 4175 2592 w
(display) 4324 2592 w
(resolution) 4640 2592 w
(is) 720 2712 w
(high) 820 2712 w
(enough,) 1031 2712 w
10 /Times-Bold f
(ppmdither) 1383 2712 w
10 /Times-Roman f
(generally) 1872 2712 w
(produces) 2276 2712 w
(better) 2668 2712 w
(looking) 2927 2712 w
(planets.) 3265 2712 w
10 /Times-Bold f
(pnmquant) 3630 2712 w
10 /Times-Roman f
(tends) 4108 2712 w
(to) 4351 2712 w
(create) 4461 2712 w
(discrete) 4730 2712 w
(color bands, particularly in the) 720 2832 w
(oceans,) 1969 2832 w
(which) 2291 2832 w
(are) 2561 2832 w
(unrealistic) 2708 2832 w
(and) 3150 2832 w
(distracting.) 3320 2832 w
(The) 3818 2832 w
(number) 3999 2832 w
(of) 4330 2832 w
(colors) 4439 2832 w
(in) 4709 2832 w
(starry) 4813 2832 w
(sky) 720 2952 w
(pictures) 887 2952 w
(generated) 1231 2952 w
(with) 1646 2952 w
(the) 1852 2952 w
10 /Times-Bold f
(\255night) 2002 2952 w
10 /Times-Roman f
(option) 2286 2952 w
(depends) 2570 2952 w
(on) 2925 2952 w
(the) 3053 2952 w
(value) 3202 2952 w
(specified) 3445 2952 w
(for) 3832 2952 w
10 /Times-Bold f
(\255saturation) 3975 2952 w
10 /Times-Roman f
(.) 4447 2952 w
(Small) 4524 2952 w
(values) 4785 2952 w
(limit) 720 3072 w
(the) 945 3072 w
(color) 1102 3072 w
(temperature) 1342 3072 w
(distribution) 1853 3072 w
(of) 2350 3072 w
(the) 2468 3072 w
(stars) 2625 3072 w
(and) 2843 3072 w
(reduce) 3022 3072 w
(the) 3322 3072 w
(number) 3479 3072 w
(of) 3819 3072 w
(colors) 3937 3072 w
(in) 4216 3072 w
(the) 4329 3072 w
(image.) 4486 3072 w
(If) 4816 3072 w
(the) 4918 3072 w
10 /Times-Bold f
(\255saturation) 720 3192 w
10 /Times-Roman f
(is) 1227 3192 w
(set) 1329 3192 w
(to) 1475 3192 w
(0,) 1588 3192 w
(none) 1697 3192 w
(of) 1925 3192 w
(the) 2042 3192 w
(stars) 2198 3192 w
(will) 2415 3192 w
(be) 2605 3192 w
(colored) 2733 3192 w
(and) 3066 3192 w
(the) 3244 3192 w
(resulting) 3400 3192 w
(image) 3784 3192 w
(will) 4062 3192 w
(never) 4252 3192 w
(contain) 4507 3192 w
(more) 4835 3192 w
(than) 720 3312 w
(256) 920 3312 w
(colors.) 1098 3312 w
(Night) 1420 3312 w
(sky) 1676 3312 w
(pictures) 1843 3312 w
(with) 2187 3312 w
(many) 2393 3312 w
(different) 2643 3312 w
(star) 3014 3312 w
(colors) 3186 3312 w
(often) 3459 3312 w
(look) 3693 3312 w
(best) 3900 3312 w
(when) 4090 3312 w
(color) 4335 3312 w
(compressed) 4569 3312 w
(by) 720 3432 w
10 /Times-Bold f
(pamdepth) 854 3432 w
10 /Times-Roman f
(rather) 1322 3432 w
(than) 1588 3432 w
10 /Times-Bold f
(pnmquant) 1794 3432 w
10 /Times-Roman f
(or) 2273 3432 w
10 /Times-Bold f
(ppmdither) 2389 3432 w
10 /Times-Roman f
(.) 2845 3432 w
(Try) 2928 3432 w
10 /Times-Italic f
(newmaxval) 3105 3432 w
10 /Times-Roman f
(settings) 3587 3432 w
(of) 3926 3432 w
(63,) 4042 3432 w
(31,) 4200 3432 w
(or) 4358 3432 w
(15) 4474 3432 w
(with) 4607 3432 w
10 /Times-Bold f
(pam\255) 4818 3432 w
(depth) 720 3552 w
10 /Times-Roman f
(to reduce the number of colors in the picture to 256 or fewer.) 990 3552 w
10 /Times-Bold f
(OPTIONS) 720 3792 w
(\255clouds) 970 3984 w
10 /Times-Roman f
(Generate) 1276 3984 w
(clouds.) 1668 3984 w
(A) 2012 3984 w
(pixmap) 2117 3984 w
(of) 2450 3984 w
(fractal) 2567 3984 w
(clouds) 2855 3984 w
(is) 3150 3984 w
(generated.) 3251 3984 w
(Selecting) 3722 3984 w
(clouds) 4128 3984 w
(sets) 4423 3984 w
(the) 4607 3984 w
(default) 4763 3984 w
(for fractal dimension to 2.15 and power scale factor to 0.75.) 1220 4104 w
10 /Times-Bold f
(\255dimension) 970 4260 w
10 /Times-Italic f
(dimen) 1469 4260 w
10 /Times-Roman f
(Sets) 1739 4260 w
(the) 1932 4260 w
(fractal) 2080 4260 w
(dimension) 2360 4260 w
(to) 2803 4260 w
(the) 2907 4260 w
(specified) 3055 4260 w
10 /Times-Italic f
(dimen) 3441 4260 w
10 /Times-Roman f
(,) 3685 4260 w
(which) 3736 4260 w
(may) 4006 4260 w
(be) 4204 4260 w
(any) 4325 4260 w
(floating) 4496 4260 w
(point) 4834 4260 w
(value) 1220 4380 w
(between) 1485 4380 w
(0) 1865 4380 w
(and) 1963 4380 w
(3.) 2155 4380 w
(Higher) 2303 4380 w
(fractal) 2628 4380 w
(dimensions) 2930 4380 w
(create) 3434 4380 w
(more) 3719 4380 w
(``chaotic'') 3972 4380 w
(images,) 4440 4380 w
(which) 4796 4380 w
(require) 1220 4500 w
(higher) 1534 4500 w
(resolution) 1821 4500 w
(output) 2253 4500 w
(and) 2541 4500 w
(a) 2717 4500 w
(larger) 2793 4500 w
(FFT) 3057 4500 w
(mesh) 3262 4500 w
(size) 3505 4500 w
(to) 3692 4500 w
(look) 3802 4500 w
(good.) 4012 4500 w
(If) 4294 4500 w
(no) 4392 4500 w
(dimension) 4524 4500 w
(is) 4973 4500 w
(specified, 2.4 is used when generating planets and 2.15 for clouds.) 1220 4620 w
10 /Times-Bold f
(\255glaciers) 970 4776 w
10 /Times-Italic f
(level) 1357 4776 w
10 /Times-Roman f
(The) 1545 4776 w
(floating) 1727 4776 w
(point) 2065 4776 w
10 /Times-Italic f
(level) 2298 4776 w
10 /Times-Roman f
(setting) 2513 4776 w
(controls) 2807 4776 w
(the) 3156 4776 w
(extent) 3305 4776 w
(to) 3576 4776 w
(which) 3682 4776 w
(terrain) 3954 4776 w
(elevation) 4242 4776 w
(causes) 4636 4776 w
(ice) 4924 4776 w
(to) 1220 4896 w
(appear) 1327 4896 w
(at) 1621 4896 w
(lower) 1722 4896 w
(latitudes.) 1978 4896 w
(The) 2396 4896 w
(default) 2580 4896 w
(value) 2886 4896 w
(of) 3131 4896 w
(0.75) 3243 4896 w
(makes) 3447 4896 w
(the) 3731 4896 w
(polar) 3881 4896 w
(caps) 4114 4896 w
(extend) 4319 4896 w
(toward) 4613 4896 w
(the) 4918 4896 w
(equator) 1220 5016 w
(across) 1554 5016 w
(high) 1838 5016 w
(terrain) 2051 5016 w
(and) 2346 5016 w
(forms) 2525 5016 w
(glaciers) 2793 5016 w
(in) 3138 5016 w
(the) 3251 5016 w
(highest) 3408 5016 w
(mountains,) 3732 5016 w
(as) 4209 5016 w
(on) 4327 5016 w
(Earth.) 4462 5016 w
(Higher) 4763 5016 w
(values) 1220 5136 w
(make) 1505 5136 w
(ice) 1751 5136 w
(sheets) 1897 5136 w
(that) 2171 5136 w
(cover) 2351 5136 w
(more) 2601 5136 w
(and) 2835 5136 w
(more) 3008 5136 w
(of) 3242 5136 w
(the) 3354 5136 w
(land) 3505 5136 w
(surface,) 3706 5136 w
(simulating) 4047 5136 w
(planets) 4499 5136 w
(in) 4811 5136 w
(the) 4918 5136 w
(midst) 1220 5256 w
(of) 1481 5256 w
(an) 1603 5256 w
(ice) 1736 5256 w
(age.) 1891 5256 w
(Lower) 2118 5256 w
(values) 2417 5256 w
(tend) 2711 5256 w
(to) 2922 5256 w
(be) 3039 5256 w
(boring,) 3172 5256 w
(resulting) 3497 5256 w
(in) 3886 5256 w
(unrealistic) 4003 5256 w
(geometrically\255) 4458 5256 w
(precise ice cap boundaries.) 1220 5376 w
10 /Times-Bold f
(\255hour) 970 5532 w
10 /Times-Italic f
(hour) 1243 5532 w
10 /Times-Roman f
(When) 1432 5532 w
(generating) 1704 5532 w
(a) 2159 5532 w
(planet,) 2237 5532 w
10 /Times-Bold f
(ppmforge) 2540 5532 w
10 /Times-Roman f
(uses) 2990 5532 w
10 /Times-Italic f
(hour) 3196 5532 w
10 /Times-Roman f
(as) 3419 5532 w
(the) 3537 5532 w
("hour) 3694 5532 w
(angle) 3953 5532 w
(at) 4204 5532 w
(the) 4311 5532 w
(central) 4468 5532 w
(merid\255) 4774 5532 w
(ian.") 1220 5652 w
(If) 1462 5652 w
(you) 1557 5652 w
(specify) 1736 5652 w
10 /Times-Bold f
(\255hour) 2053 5652 w
(12) 2321 5652 w
10 /Times-Roman f
(,) 2421 5652 w
(for) 2475 5652 w
(example,) 2620 5652 w
(the) 3012 5652 w
(planet) 3163 5652 w
(will) 3436 5652 w
(be) 3621 5652 w
(fully) 3743 5652 w
(illuminated,) 3960 5652 w
(corresponding) 4469 5652 w
(to) 1220 5772 w
(high) 1332 5772 w
(noon) 1544 5772 w
(at) 1778 5772 w
(the) 1884 5772 w
(longitude) 2040 5772 w
(at) 2452 5772 w
(the) 2558 5772 w
(center) 2714 5772 w
(of) 2992 5772 w
(the) 3110 5772 w
(screen.) 3267 5772 w
(You) 3606 5772 w
(can) 3813 5772 w
(specify) 3986 5772 w
(any) 4309 5772 w
(floating) 4488 5772 w
(point) 4834 5772 w
(value) 1220 5892 w
(between) 1464 5892 w
(0) 1824 5892 w
(and) 1902 5892 w
(24) 2074 5892 w
(for) 2202 5892 w
10 /Times-Italic f
(hour) 2346 5892 w
10 /Times-Roman f
(,) 2535 5892 w
(but) 2588 5892 w
(values) 2744 5892 w
(which) 3027 5892 w
(place) 3299 5892 w
(most) 3537 5892 w
(of) 3760 5892 w
(the) 3871 5892 w
(planet) 4021 5892 w
(in) 4293 5892 w
(darkness) 4399 5892 w
(\(0) 4775 5892 w
(to) 4885 5892 w
(4) 4990 5892 w
(and) 1220 6012 w
(20) 1397 6012 w
(to) 1530 6012 w
(24\)) 1641 6012 w
(result) 1807 6012 w
(in) 2062 6012 w
(crescents) 2173 6012 w
(which,) 2571 6012 w
(while) 2873 6012 w
(pretty,) 3128 6012 w
(don't) 3420 6012 w
(give) 3665 6012 w
(you) 3871 6012 w
(many) 4055 6012 w
(illuminated) 4311 6012 w
(pixels) 4801 6012 w
(for) 1220 6132 w
(the) 1371 6132 w
(amount) 1528 6132 w
(of) 1863 6132 w
(computing) 1981 6132 w
(that's) 2444 6132 w
(required.) 2701 6132 w
(If) 3118 6132 w
(no) 3219 6132 w
10 /Times-Bold f
(\255hour) 3354 6132 w
10 /Times-Roman f
(option) 3628 6132 w
(is) 3919 6132 w
(specified,) 4021 6132 w
(a) 4440 6132 w
(random) 4518 6132 w
(hour) 4857 6132 w
(angle is chosen, biased so that only 25% of the images generated will be crescents.) 1220 6252 w
10 /Times-Bold f
(\255ice) 970 6408 w
10 /Times-Italic f
(level) 1144 6408 w
10 /Times-Roman f
(Sets the extent of the polar ice caps) 1332 6408 w
(to) 2769 6408 w
(the) 2873 6408 w
(given) 3021 6408 w
(floating) 3269 6408 w
(point) 3606 6408 w
10 /Times-Italic f
(level) 3838 6408 w
10 /Times-Roman f
(.) 4026 6408 w
(The) 4102 6408 w
(default) 4283 6408 w
(level) 4586 6408 w
(of) 4806 6408 w
(0.4) 4915 6408 w
(produces) 1220 6528 w
(ice) 1607 6528 w
(caps) 1750 6528 w
(similar) 1954 6528 w
(to) 2259 6528 w
(those) 2364 6528 w
(of) 2602 6528 w
(the) 2712 6528 w
(Earth.) 2861 6528 w
(Smaller) 3154 6528 w
(values) 3492 6528 w
(reduce) 3774 6528 w
(the) 4066 6528 w
(amount) 4215 6528 w
(of) 4542 6528 w
(ice,) 4651 6528 w
(while) 4818 6528 w
(larger) 1220 6648 w
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(\255ice) 1486 6648 w
10 /Times-Roman f
(settings) 1669 6648 w
(create) 2009 6648 w
(more) 2281 6648 w
(prominent) 2521 6648 w
(ice) 2967 6648 w
(caps.) 3118 6648 w
(Sufficiently) 3380 6648 w
(large) 3887 6648 w
(values,) 4121 6648 w
(such) 4436 6648 w
(as) 4654 6648 w
(100) 4772 6648 w
(or) 4957 6648 w
(more, in conjunction with small settings for) 1220 6768 w
10 /Times-Bold f
(\255glaciers) 2992 6768 w
10 /Times-Roman f
(\(try 0.1\) create "ice balls" like Europa.) 3377 6768 w
10 /Times-Bold f
(\255inclination) 970 6924 w
10 /S f
(\357) 1460 6924 w
10 /Times-Bold f
(\255tilt) 1509 6924 w
10 /Times-Italic f
(angle) 1703 6924 w
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(The) 1925 6924 w
(inclination) 2119 6924 w
(angle) 2586 6924 w
(of) 2841 6924 w
(the) 2963 6924 w
(planet) 3124 6924 w
(with) 3407 6924 w
(regard) 3624 6924 w
(to) 3917 6924 w
(its) 4034 6924 w
(primary) 4168 6924 w
(star) 4523 6924 w
(is) 4706 6924 w
(set) 4812 6924 w
(to) 4962 6924 w
10 /Times-Italic f
(angle) 1220 7044 w
10 /Times-Roman f
(,) 1442 7044 w
(which) 1507 7044 w
(can) 1791 7044 w
(be) 1969 7044 w
(any) 2103 7044 w
(floating) 2287 7044 w
(point) 2638 7044 w
(value) 2884 7044 w
(from) 3140 7044 w
(\25590) 3374 7044 w
(to) 3547 7044 w
(90.) 3664 7044 w
(The) 3853 7044 w
(inclination) 4047 7044 w
(angle) 4514 7044 w
(can) 4769 7044 w
(be) 4946 7044 w
(thought of as specifying, in degrees, the ``season'' the planet is presently) 1220 7164 w
(experiencing) 4160 7164 w
(or,) 4701 7164 w
(more) 4835 7164 w
(precisely,) 1220 7284 w
(the) 1640 7284 w
(latitude) 1797 7284 w
(at) 2131 7284 w
(which) 2237 7284 w
(the) 2515 7284 w
(star) 2671 7284 w
(transits) 2849 7284 w
(the) 3172 7284 w
(zenith) 3328 7284 w
(at) 3606 7284 w
(local) 3712 7284 w
(noon.) 3940 7284 w
(If) 4224 7284 w
(0,) 4324 7284 w
(the) 4433 7284 w
(planet) 4589 7284 w
(is) 4867 7284 w
(at) 4968 7284 w
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10 /Times-Roman f
(\255 3 \255) 2797 480 w
(equinox;) 1220 840 w
(the) 1602 840 w
(star) 1756 840 w
(is) 1932 840 w
(directly) 2032 840 w
(overhead) 2370 840 w
(at) 2768 840 w
(the) 2873 840 w
(equator.) 3028 840 w
(Positive) 3410 840 w
(values) 3766 840 w
(represent) 4054 840 w
(summer) 4452 840 w
(in) 4807 840 w
(the) 4918 840 w
(northern) 1220 960 w
(hemisphere,) 1584 960 w
(negative) 2095 960 w
(values) 2459 960 w
(summer) 2740 960 w
(in the southern hemisphere.) 3088 960 w
(The Earth's inclina\255) 4242 960 w
(tion) 1220 1080 w
(angle,) 1414 1080 w
(for) 1693 1080 w
(example,) 1847 1080 w
(is) 2248 1080 w
(about) 2353 1080 w
(23.5) 2613 1080 w
(at) 2826 1080 w
(the) 2936 1080 w
(June) 3096 1080 w
(solstice,) 3317 1080 w
(0) 3680 1080 w
(at) 3768 1080 w
(the) 3878 1080 w
(equinoxes) 4038 1080 w
(in) 4481 1080 w
(March) 4597 1080 w
(and) 4896 1080 w
(September,) 1220 1200 w
(and) 1705 1200 w
(\25523.5) 1882 1200 w
(at) 2123 1200 w
(the) 2228 1200 w
(December) 2382 1200 w
(solstice.) 2823 1200 w
(If) 3205 1200 w
(no) 3303 1200 w
(inclination) 3435 1200 w
(angle) 3895 1200 w
(is) 4143 1200 w
(specified,) 4242 1200 w
(a) 4659 1200 w
(random) 4735 1200 w
(value between \25521.6 and 21.6 degrees is chosen.) 1220 1320 w
10 /Times-Bold f
(\255mesh) 970 1476 w
10 /Times-Italic f
(size) 1254 1476 w
10 /Times-Roman f
(A) 1404 1476 w
(mesh) 1505 1476 w
(of) 1745 1476 w
10 /Times-Italic f
(size) 1857 1476 w
10 /Times-Roman f
(by) 2037 1476 w
10 /Times-Italic f
(size) 2167 1476 w
10 /Times-Roman f
(will) 2347 1476 w
(be) 2533 1476 w
(used) 2657 1476 w
(for) 2870 1476 w
(the) 3016 1476 w
(fast) 3168 1476 w
(Fourier) 3342 1476 w
(transform) 3666 1476 w
(\(FFT\).) 4084 1476 w
(Note) 4403 1476 w
(that) 4627 1476 w
(mem\255) 4807 1476 w
(ory) 1220 1596 w
(requirements) 1382 1596 w
(and) 1932 1596 w
(computation) 2105 1596 w
(speed) 2634 1596 w
(increase) 2890 1596 w
(as) 3245 1596 w
(the) 3357 1596 w
(square) 3507 1596 w
(of) 3795 1596 w
10 /Times-Italic f
(size) 3906 1596 w
10 /Times-Roman f
(;) 4056 1596 w
(if) 4112 1596 w
(you) 4201 1596 w
(double) 4379 1596 w
(the) 4679 1596 w
(mesh) 4829 1596 w
(size, the program will) 1220 1716 w
(use) 2117 1716 w
(four) 2276 1716 w
(times) 2468 1716 w
(the) 2711 1716 w
(memory) 2859 1716 w
(and) 3218 1716 w
(run) 3388 1716 w
(four) 3547 1716 w
(times) 3739 1716 w
(as) 3982 1716 w
(long.) 4091 1716 w
(The) 4345 1716 w
(default) 4526 1716 w
(mesh) 4829 1716 w
(is) 1220 1836 w
(256x256,) 1317 1836 w
(which) 1721 1836 w
(produces) 1994 1836 w
(reasonably) 2383 1836 w
(good) 2844 1836 w
(looking) 3073 1836 w
(pictures) 3408 1836 w
(while) 3753 1836 w
(using) 4004 1836 w
(half) 4250 1836 w
(a) 4434 1836 w
(megabyte) 4507 1836 w
(for) 4924 1836 w
(the) 1220 1956 w
(256x256) 1379 1956 w
(array) 1766 1956 w
(of) 2008 1956 w
(single) 2129 1956 w
(precision) 2406 1956 w
(complex) 2810 1956 w
(numbers) 3192 1956 w
(required) 3574 1956 w
(by) 3944 1956 w
(the) 4082 1956 w
(FFT.) 4242 1956 w
(On) 4503 1956 w
(machines) 4663 1956 w
(with) 1220 2076 w
(limited) 1430 2076 w
(memory) 1746 2076 w
(capacity,) 2111 2076 w
(you) 2500 2076 w
(may) 2682 2076 w
(have) 2886 2076 w
(to) 3106 2076 w
(reduce) 3216 2076 w
(the) 3513 2076 w
(mesh) 3666 2076 w
(size) 3908 2076 w
(to) 4094 2076 w
(avoid) 4203 2076 w
(running) 4456 2076 w
(out) 4798 2076 w
(of) 4957 2076 w
(RAM.) 1220 2196 w
(Increasing) 1528 2196 w
(the) 1973 2196 w
(mesh) 2125 2196 w
(size) 2366 2196 w
(produces) 2552 2196 w
(better) 2943 2196 w
(looking) 3201 2196 w
(pictures;) 3538 2196 w
(the) 3913 2196 w
(difference) 4066 2196 w
(becomes) 4500 2196 w
(par\255) 4880 2196 w
(ticularly) 1220 2316 w
(noticeable) 1582 2316 w
(when) 2020 2316 w
(generating) 2264 2316 w
(high) 2713 2316 w
(resolution) 2919 2316 w
(images) 3347 2316 w
(with) 3658 2316 w
(relatively) 3864 2316 w
(high) 4269 2316 w
(fractal) 4475 2316 w
(dimen\255) 4757 2316 w
(sions \(between 2.2 and 3\).) 1220 2436 w
10 /Times-Bold f
(\255night) 970 2592 w
10 /Times-Roman f
(A) 1226 2592 w
(starry) 1330 2592 w
(sky) 1589 2592 w
(is) 1760 2592 w
(generated.) 1859 2592 w
(The) 2328 2592 w
(stars) 2516 2592 w
(are) 2732 2592 w
(created) 2886 2592 w
(by) 3206 2592 w
(the) 3339 2592 w
(same) 3494 2592 w
(algorithm) 3732 2592 w
(used) 4154 2592 w
(for) 4370 2592 w
(the) 4519 2592 w
(stars) 4674 2592 w
(that) 4890 2592 w
(surround planet pictures, but the output consists exclusively of stars.) 1220 2712 w
10 /Times-Bold f
(\255power) 970 2868 w
10 /Times-Italic f
(factor) 1306 2868 w
10 /Times-Roman f
(Sets) 1545 2868 w
(the) 1749 2868 w
("power) 1908 2868 w
(factor") 2235 2868 w
(used) 2545 2868 w
(to) 2765 2868 w
(scale) 2880 2868 w
(elevations) 3116 2868 w
(synthesised) 3558 2868 w
(from) 4057 2868 w
(the) 4289 2868 w
(FFT) 4449 2868 w
(to) 4660 2868 w
10 /Times-Italic f
(factor) 4776 2868 w
10 /Times-Roman f
(,) 5015 2868 w
(which) 1220 2988 w
(can) 1493 2988 w
(be) 1660 2988 w
(any) 1783 2988 w
(floating) 1956 2988 w
(point) 2295 2988 w
(number) 2529 2988 w
(greater) 2862 2988 w
(than) 3166 2988 w
(zero.) 3366 2988 w
(If) 3615 2988 w
(no) 3709 2988 w
(factor) 3837 2988 w
(is) 4097 2988 w
(specified) 4192 2988 w
(a) 4580 2988 w
(default) 4652 2988 w
(of) 4957 2988 w
(1.2) 1220 3108 w
(is) 1376 3108 w
(used) 1474 3108 w
(if) 1688 3108 w
(a) 1780 3108 w
(planet) 1855 3108 w
(is) 2130 3108 w
(being) 2228 3108 w
(generated,) 2481 3108 w
(or) 2924 3108 w
(0.75) 3038 3108 w
(if) 3244 3108 w
(clouds) 3336 3108 w
(are) 3629 3108 w
(selected) 3782 3108 w
(by) 4135 3108 w
(the) 4267 3108 w
10 /Times-Bold f
(\255clouds) 4421 3108 w
10 /Times-Roman f
(option.) 4759 3108 w
(The) 1220 3228 w
(result) 1403 3228 w
(of) 1653 3228 w
(the) 1764 3228 w
(FFT) 1914 3228 w
(image) 2115 3228 w
(synthesis) 2387 3228 w
(is) 2782 3228 w
(an) 2877 3228 w
(array) 2999 3228 w
(of) 3231 3228 w
(elevation) 3342 3228 w
(values) 3736 3228 w
(between) 4019 3228 w
(0) 4379 3228 w
(and) 4457 3228 w
(1.) 4629 3228 w
(A) 4757 3228 w
(non\255) 4857 3228 w
(unity) 1220 3348 w
(power) 1452 3348 w
(factor) 1727 3348 w
(exponentiates) 1985 3348 w
(each) 2561 3348 w
(of) 2770 3348 w
(these) 2880 3348 w
(elevations) 3112 3348 w
(to) 3544 3348 w
(the) 3649 3348 w
(specified) 3798 3348 w
(power.) 4185 3348 w
(For) 4511 3348 w
(example,) 4677 3348 w
(a) 1220 3468 w
(power) 1306 3468 w
(factor) 1597 3468 w
(of) 1871 3468 w
(2) 1996 3468 w
(squares) 2088 3468 w
(each) 2429 3468 w
(value,) 2653 3468 w
(while) 2935 3468 w
(a) 3198 3468 w
(power) 3283 3468 w
(factor) 3573 3468 w
(of) 3846 3468 w
(0.5) 3970 3468 w
(replaces) 4136 3468 w
(each) 4503 3468 w
(with) 4726 3468 w
(its) 4945 3468 w
(square) 1220 3588 w
(root.) 1506 3588 w
(\(Note) 1743 3588 w
(that) 1996 3588 w
(exponentiating) 2172 3588 w
(values) 2792 3588 w
(between) 3073 3588 w
(0) 3431 3588 w
(and) 3507 3588 w
(1) 3678 3588 w
(yields) 3755 3588 w
(values) 4021 3588 w
(that) 4303 3588 w
(remain) 4480 3588 w
(within) 4784 3588 w
(that) 1220 3708 w
(range.\)) 1403 3708 w
(Power) 1740 3708 w
(factors) 2028 3708 w
(less) 2331 3708 w
(than) 2513 3708 w
(1) 2717 3708 w
(emphasise) 2799 3708 w
(large\255scale) 3247 3708 w
(elevation) 3710 3708 w
(changes) 4108 3708 w
(at) 4461 3708 w
(the) 4565 3708 w
(expense) 4719 3708 w
(of) 1220 3828 w
(small) 1330 3828 w
(variations.) 1574 3828 w
(Power) 2045 3828 w
(factors) 2327 3828 w
(greater) 2625 3828 w
(than) 2929 3828 w
(1) 3129 3828 w
(increase) 3207 3828 w
(the) 3561 3828 w
(roughness) 3711 3828 w
(of) 4144 3828 w
(the) 4255 3828 w
(terrain) 4405 3828 w
(and,) 4693 3828 w
(like) 4890 3828 w
(high) 1220 3948 w
(fractal) 1427 3948 w
(dimensions,) 1710 3948 w
(may) 2220 3948 w
(require) 2421 3948 w
(a) 2731 3948 w
(larger) 2803 3948 w
(FFT) 3063 3948 w
(mesh) 3264 3948 w
(size) 3503 3948 w
(and/or) 3686 3948 w
(higher) 3969 3948 w
(screen) 4252 3948 w
(resolution) 4534 3948 w
(to) 4962 3948 w
(look good.) 1220 4068 w
10 /Times-Bold f
(\255saturation) 970 4224 w
10 /Times-Italic f
(sat) 1475 4224 w
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(Controls) 1592 4224 w
(the) 1970 4224 w
(degree) 2125 4224 w
(of) 2423 4224 w
(color) 2539 4224 w
(saturation) 2777 4224 w
(of) 3205 4224 w
(the) 3322 4224 w
(stars) 3478 4224 w
(that) 3695 4224 w
(surround) 3879 4224 w
(planet) 4268 4224 w
(pictures) 4546 4224 w
(and) 4896 4224 w
(fill) 1220 4344 w
(starry) 1374 4344 w
(skies) 1638 4344 w
(created) 1875 4344 w
(with) 2198 4344 w
(the) 2412 4344 w
10 /Times-Bold f
(\255night) 2570 4344 w
10 /Times-Roman f
(option.) 2862 4344 w
(The) 3204 4344 w
(default) 3395 4344 w
(value) 3708 4344 w
(of) 3960 4344 w
(125) 4079 4344 w
(creates) 4265 4344 w
(stars) 4577 4344 w
(which) 4796 4344 w
(resemble) 1220 4464 w
(the) 1622 4464 w
(sky) 1786 4464 w
(as) 1967 4464 w
(seen) 2092 4464 w
(by) 2311 4464 w
(the) 2454 4464 w
(human) 2619 4464 w
(eye) 2934 4464 w
(from) 3115 4464 w
(Earth's) 3352 4464 w
(surface.) 3683 4464 w
(Stars) 4063 4464 w
(are) 4306 4464 w
(dim;) 4470 4464 w
(only) 4697 4464 w
(the) 4918 4464 w
(brightest) 1220 4584 w
(activate) 1602 4584 w
(the) 1944 4584 w
(cones) 2097 4584 w
(in) 2355 4584 w
(the) 2464 4584 w
(human) 2617 4584 w
(retina,) 2920 4584 w
(causing) 3203 4584 w
(color) 3539 4584 w
(to) 3775 4584 w
(be) 3884 4584 w
(perceived.) 4009 4584 w
(Higher) 4477 4584 w
(values) 4785 4584 w
(of) 1220 4704 w
10 /Times-Italic f
(sat) 1347 4704 w
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(approximate) 1508 4704 w
(the) 2051 4704 w
(appearance) 2217 4704 w
(of) 2708 4704 w
(stars) 2835 4704 w
(from) 3062 4704 w
(Earth) 3300 4704 w
(orbit,) 3560 4704 w
(where) 3818 4704 w
(better) 4105 4704 w
(dark) 4377 4704 w
(adaptation,) 4599 4704 w
(absence) 1220 4824 w
(of) 1564 4824 w
(skyglow,) 1676 4824 w
(and) 2069 4824 w
(the) 2242 4824 w
(concentration) 2393 4824 w
(of) 2965 4824 w
(light) 3077 4824 w
(from) 3290 4824 w
(a) 3513 4824 w
(given) 3586 4824 w
(star) 3837 4824 w
(onto) 4010 4824 w
(a) 4217 4824 w
(smaller) 4290 4824 w
(area) 4613 4824 w
(of) 4807 4824 w
(the) 4918 4824 w
(retina) 1220 4944 w
(thanks) 1481 4944 w
(to) 1776 4944 w
(the) 1888 4944 w
(lack) 2044 4944 w
(of) 2245 4944 w
(atmospheric) 2363 4944 w
(turbulence) 2886 4944 w
(enhances) 3342 4944 w
(the) 3742 4944 w
(perception) 3899 4944 w
(of) 4355 4944 w
(color.) 4473 4944 w
(Values) 4763 4944 w
(greater than 250 create ``science fiction'' skies that, while pretty, don't occur in this universe.) 1220 5064 w
(Thanks) 970 5220 w
(to) 1295 5220 w
(the) 1404 5220 w
(inverse) 1557 5220 w
(square) 1876 5220 w
(law) 2167 5220 w
(combined) 2342 5220 w
(with) 2767 5220 w
(Nature's) 2976 5220 w
(love) 3350 5220 w
(of) 3553 5220 w
(mediocrity,) 3667 5220 w
(there) 4156 5220 w
(are) 4386 5220 w
(many,) 4539 5220 w
(many) 4818 5220 w
(dim) 970 5340 w
(stars) 1160 5340 w
(for) 1377 5340 w
(every) 1527 5340 w
(bright) 1782 5340 w
(one.) 2055 5340 w
(This) 2283 5340 w
(population) 2495 5340 w
(relationship) 2957 5340 w
(is) 3463 5340 w
(accurately) 3564 5340 w
(reflected) 4006 5340 w
(in) 4387 5340 w
(the) 4498 5340 w
(skies) 4653 5340 w
(cre\255) 4886 5340 w
(ated) 970 5460 w
(by) 1172 5460 w
10 /Times-Bold f
(ppmforge) 1308 5460 w
10 /Times-Roman f
(.) 1724 5460 w
(Dim,) 1810 5460 w
(low) 2049 5460 w
(mass) 2235 5460 w
(stars) 2471 5460 w
(live) 2690 5460 w
(much) 2876 5460 w
(longer) 3134 5460 w
(than) 3425 5460 w
(bright) 3633 5460 w
(massive) 3909 5460 w
(stars,) 4268 5460 w
(consequently) 4513 5460 w
(there) 970 5580 w
(are) 1199 5580 w
(many) 1350 5580 w
(reddish) 1602 5580 w
(stars) 1926 5580 w
(for) 2139 5580 w
(every) 2285 5580 w
(blue) 2536 5580 w
(giant.) 2738 5580 w
(This) 3018 5580 w
(relationship) 3226 5580 w
(is) 3728 5580 w
(preserved) 3825 5580 w
(by) 4242 5580 w
10 /Times-Bold f
(ppmforge) 4372 5580 w
10 /Times-Roman f
(.) 4788 5580 w
(You) 4868 5580 w
(can) 970 5700 w
(reverse) 1137 5700 w
(the) 1453 5700 w
(proportion,) 1604 5700 w
(simulating) 2081 5700 w
(the) 2534 5700 w
(sky) 2686 5700 w
(as) 2855 5700 w
(seen) 2968 5700 w
(in) 3175 5700 w
(a) 3283 5700 w
(starburst) 3357 5700 w
(galaxy,) 3731 5700 w
(by) 4052 5700 w
(specifying) 4182 5700 w
(a) 4628 5700 w
(negative) 4702 5700 w
10 /Times-Italic f
(sat) 970 5820 w
10 /Times-Roman f
(value.) 1112 5820 w
10 /Times-Bold f
(\255seed) 970 5976 w
10 /Times-Italic f
(num) 1213 5976 w
10 /Times-Roman f
(Sets) 1385 5976 w
(the) 1579 5976 w
(seed) 1728 5976 w
(for) 1932 5976 w
(the) 2075 5976 w
(random) 2224 5976 w
(number) 2556 5976 w
(generator) 2888 5976 w
(to) 3291 5976 w
(the) 3396 5976 w
(integer) 3545 5976 w
10 /Times-Italic f
(num) 3849 5976 w
10 /Times-Roman f
(.) 4021 5976 w
(The) 4098 5976 w
(seed) 4281 5976 w
(used) 4486 5976 w
(to) 4697 5976 w
(create) 4803 5976 w
(each) 1220 6096 w
(picture) 1437 6096 w
(is) 1749 6096 w
(displayed) 1851 6096 w
(on) 2269 6096 w
(standard) 2403 6096 w
(output) 2775 6096 w
(\(unless) 3065 6096 w
(suppressed) 3382 6096 w
(with) 3854 6096 w
(the) 4066 6096 w
10 /Times-Bold f
(\255quiet) 4222 6096 w
10 /Times-Roman f
(option\).) 4506 6096 w
(Pic\255) 4879 6096 w
(tures) 1220 6216 w
(generated) 1448 6216 w
(with) 1869 6216 w
(the) 2081 6216 w
(same) 2237 6216 w
(seed) 2476 6216 w
(will) 2687 6216 w
(be) 2877 6216 w
(identical.) 3006 6216 w
(If) 3435 6216 w
(no) 3536 6216 w
10 /Times-Bold f
(\255seed) 3671 6216 w
10 /Times-Roman f
(is) 3922 6216 w
(specified,) 4024 6216 w
(a) 4444 6216 w
(random) 4523 6216 w
(seed) 4863 6216 w
(derived) 1220 6336 w
(from) 1553 6336 w
(the) 1781 6336 w
(date) 1937 6336 w
(and) 2137 6336 w
(time) 2315 6336 w
(will) 2527 6336 w
(be) 2717 6336 w
(chosen.) 2845 6336 w
(Specifying) 3206 6336 w
(an) 3672 6336 w
(explicit) 3799 6336 w
(seed) 4132 6336 w
(allows) 4342 6336 w
(you) 4636 6336 w
(to) 4819 6336 w
(re\255) 4930 6336 w
(render) 1220 6456 w
(a) 1507 6456 w
(picture) 1584 6456 w
(you) 1894 6456 w
(particularly) 2077 6456 w
(like) 2570 6456 w
(at) 2753 6456 w
(a) 2858 6456 w
(higher) 2935 6456 w
(resolution) 3223 6456 w
(or) 3656 6456 w
(with) 3772 6456 w
(different) 3983 6456 w
(viewing) 4359 6456 w
(parame\255) 4714 6456 w
(ters.) 1220 6576 w
10 /Times-Bold f
(\255stars) 970 6732 w
10 /Times-Italic f
(fraction) 1243 6732 w
10 /Times-Roman f
(Specifies) 1560 6732 w
(the) 1961 6732 w
(percentage) 2118 6732 w
(of) 2584 6732 w
(pixels,) 2702 6732 w
(in) 3001 6732 w
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