layers/craters/rays.cpp - TerrainGen coverage

layers/craters/rays.cpp

Line	Branch	Exec	Source
1			#include "terraingen/layers/craters/rays.h"
2
3			#include "terraingen/random/stream.h"
4
5			#include <algorithm>
6			#include <cmath>
7			#include <numbers>
8			#include <stdexcept>
9
10			namespace terraingen {
11
12			namespace {
13
14			constexpr std::uint32_t kRayStream = 0x52415953u;
15
16			} // namespace
17
18		71	void ValidateRayLayout(const RayLayout& layout) {
19		71	ValidateValueDistribution(layout.count);
20		71	ValidateValueDistribution(layout.widthDegrees);
21	6/6 ✓ Branch 1 taken 70 times. ✓ Branch 2 taken 1 time. ✓ Branch 4 taken 1 time. ✓ Branch 5 taken 69 times. ✓ Branch 6 taken 2 times. ✓ Branch 7 taken 69 times.	71	if (layout.count.Lowest() < 0.0 \|\| layout.count.Highest() > 64.0) {
22	1/1 ✓ Branch 2 taken 2 times.	2	throw std::invalid_argument("Craters must have 0 to 64 rays");
23			}
24	5/6 ✓ Branch 1 taken 69 times. ✗ Branch 2 not taken. ✓ Branch 4 taken 3 times. ✓ Branch 5 taken 66 times. ✓ Branch 6 taken 3 times. ✓ Branch 7 taken 66 times.	69	if (!(layout.widthDegrees.Lowest() > 0.0 && layout.widthDegrees.Highest() < 180.0)) {
25	1/1 ✓ Branch 2 taken 3 times.	3	throw std::invalid_argument("Ray widths must be in (0, 180) degrees");
26			}
27		66	}
28
29		1766	std::vector<RayDirection> RayDirections(const Crater& crater, const RayLayout& layout) {
30		1766	const IdWords id = SplitId(crater.id);
31	1/1 ✓ Branch 1 taken 1766 times.	1766	RandomStream random(layout.seed, kRayStream, id.low, id.high);
32	1/1 ✓ Branch 1 taken 1766 times.	1766	const double c1 = random.NextDouble();
33	1/1 ✓ Branch 1 taken 1766 times.	1766	const double c2 = random.NextDouble();
34	1/1 ✓ Branch 1 taken 1766 times.	1766	const auto count = static_cast<int>(std::lround(layout.count.Sample(c1, c2)));
35		1766	std::vector<RayDirection> rays;
36	1/1 ✓ Branch 2 taken 1766 times.	1766	rays.reserve(static_cast<std::size_t>(std::max(count, 0)));
37	2/2 ✓ Branch 0 taken 17218 times. ✓ Branch 1 taken 1766 times.	18984	for (int i = 0; i < count; ++i) {
38		17218	RayDirection ray;
39	1/1 ✓ Branch 1 taken 17218 times.	17218	ray.azimuth = 2.0 * std::numbers::pi * random.NextDouble();
40	1/1 ✓ Branch 1 taken 17218 times.	17218	const double w1 = random.NextDouble();
41	1/1 ✓ Branch 1 taken 17218 times.	17218	const double w2 = random.NextDouble();
42		17218	ray.sinHalfWidth =
43	1/1 ✓ Branch 1 taken 17218 times.	17218	std::sin(0.5 * layout.widthDegrees.Sample(w1, w2) * std::numbers::pi / 180.0);
44	1/1 ✓ Branch 1 taken 17218 times.	17218	ray.key = random.NextU32();
45	1/1 ✓ Branch 1 taken 17218 times.	17218	rays.push_back(ray);
46			}
47		3532	return rays;
48			}
49
50			} // namespace terraingen
51