TerrainGen coverage

terraingen/
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layers/craters/shaping/apply_options.cpp
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1 #include "terraingen/layers/craters/shaping/apply_options.h"
2
3 #include "terraingen/util/checks.h"
4
5 #include <algorithm>
6 #include <cmath>
7 #include <numeric>
8 #include <stdexcept>
9
10 namespace terraingen {
11
12 790049 double RimSmoothing::Weight(double radii) const {
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 790049 if (sigmaRadii == 0.0) {
14 714185 return 0.0;
15 }
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 75864 if (radii <= 1.0) {
17 32024 return strength * Falloff(2.0 - radii, 1.0, 2.0 - innerRadii, shape);
18 }
19 43840 return strength * Falloff(radii, 1.0, outerRadii, shape);
20 }
21
22 246704 void ValidateRimSmoothing(const RimSmoothing& smoothing) {
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 246704 RequireNonNegative(smoothing.sigmaRadii, "Rim smoothing sigma");
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 246704 if (!(smoothing.strength >= 0.0 && smoothing.strength <= 1.0)) {
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 2 throw std::invalid_argument("Rim smoothing strength must be between 0 and 1");
26 }
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 493403 if (!(smoothing.innerRadii >= 0.0 && smoothing.innerRadii < 1.0 && smoothing.outerRadii > 1.0 &&
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 246701 std::isfinite(smoothing.outerRadii))) {
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 1 throw std::invalid_argument("Rim smoothing band must satisfy 0 <= inner < 1 < outer");
30 }
31 246701 }
32
33 246713 void ValidateCraterNoise(const CraterNoise& noise) {
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 246713 RequireNonNegative(noise.amplitude, "Crater noise amplitude");
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 246712 RequireNonNegative(noise.rimAmplitude, "Crater rim noise amplitude");
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 246712 RequirePositive(noise.wavelengthRadii, "Crater noise wavelength");
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 246711 RequirePositive(noise.rimWavelengthRadii, "Crater rim noise wavelength");
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 246711 RequirePositive(noise.gain, "Crater noise gain");
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 246711 if (noise.octaves < 1 || noise.octaves > 12) {
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 3 throw std::invalid_argument("Crater noise needs 1 to 12 octaves");
41 }
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 493415 if (!(noise.rimInnerRadii >= 0.0 && noise.rimInnerRadii < 1.0 && noise.rimOuterRadii > 1.0 &&
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 246707 std::isfinite(noise.rimOuterRadii))) {
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 1 throw std::invalid_argument("Crater rim noise band must satisfy 0 <= inner < 1 < outer");
45 }
46 246707 }
47
48 246711 void ValidateCraterTexture(const CraterTexture& texture) {
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 246711 RequireNonNegative(texture.wallStreaks, "Crater wall streak amplitude");
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 246711 RequireNonNegative(texture.ejecta, "Crater ejecta texture amplitude");
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 246711 RequirePositive(texture.wallStreakWidthRadii, "Crater wall streak width");
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 246710 RequirePositive(texture.ejectaLineationRadii, "Crater ejecta lineation width");
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 246710 if (!(texture.mantling >= 0.0 && texture.mantling <= 1.0)) {
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 2 throw std::invalid_argument("Crater ejecta mantling must be in [0, 1]");
55 }
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 246708 if (!(texture.ejectaReachRadii > 1.0 && std::isfinite(texture.ejectaReachRadii))) {
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 1 throw std::invalid_argument("Crater ejecta must reach beyond 1 radius");
58 }
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 246707 if (!(texture.minFreshness >= 0.0 && texture.minFreshness < 1.0)) {
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 1 throw std::invalid_argument("Crater texture minFreshness must be in [0, 1)");
61 }
62 246706 }
63
64 54006 double EjectaThicknessShare(double radii, double reachRadii) {
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 54006 if (radii <= 1.0) {
66 3 return 1.0;
67 }
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 54003 if (radii >= reachRadii) {
69 1 return 0.0;
70 }
71 54002 const double atReach = 1.0 / (reachRadii * reachRadii * reachRadii);
72 54002 return (1.0 / (radii * radii * radii) - atReach) / (1.0 - atReach);
73 }
74
75 246709 void ValidateCraterApplyOptions(const CraterApplyOptions& options) {
76 246709 ValidateCraterNoise(options.noise);
77 246707 ValidateCraterTexture(options.texture);
78 246706 ValidateResolutionFade(options.fade);
79 246703 ValidateCraterIrregularity(options.irregularity);
80 246703 ValidateRimSmoothing(options.rimSmoothing);
81 246701 ValidateCraterSlopeResponse(options.slope);
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 246715 if ((options.slope.enabled || options.slope.criticalGradient) &&
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 14 options.datum != CraterDatum::Plane) {
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 3 throw std::invalid_argument("A crater slope response needs the plane datum");
85 }
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 246698 RequirePositive(options.datumFitRadii, "datumFitRadii");
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 246697 if (!(options.interiorReplacement >= 0.0 && options.interiorReplacement <= 1.0)) {
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 4 throw std::invalid_argument("interiorReplacement must be between 0 and 1");
89 }
90 246693 const CraterBlend& blend = options.blend;
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 493386 if (!(std::isfinite(blend.startRadii) && std::isfinite(blend.endRadii) &&
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 246693 blend.startRadii >= 0.0 && blend.endRadii > blend.startRadii)) {
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 2 throw std::invalid_argument("Crater blend must satisfy 0 <= startRadii < endRadii");
94 }
95 246691 }
96
97 129838 std::vector<std::size_t> CraterApplyOrder(const CraterList& craters, CraterOrder order) {
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 129838 std::vector<std::size_t> indices(craters.Size());
99 129838 std::iota(indices.begin(), indices.end(), std::size_t{0});
100 129838 const auto& age = craters.AgesGyr();
101 129838 const auto& diameter = craters.Diameters();
102 129838 const auto& id = craters.Ids();
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 129838 std::sort(indices.begin(), indices.end(), [&](std::size_t a, std::size_t b) {
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 87813530 if (order == CraterOrder::OldestFirst && age[a] != age[b]) {
105 87622681 return age[a] > age[b];
106 }
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 190849 if (diameter[a] != diameter[b]) {
108 187468 return diameter[a] > diameter[b];
109 }
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 3381 if (age[a] != age[b]) {
111 3 return age[a] > age[b];
112 }
113 3378 return id[a] < id[b];
114 });
115 129838 return indices;
116 }
117
118 } // namespace terraingen
119