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Code Issues 144 Wiki Activity

fix(editor): the track shown while it's laid over the ground no longer holds up the frames: its grade line is fitted on a thread of its own, the line fitted a moment ago stretched over the track meanwhile, and the click takes the line fitted for the same ground instead of fitting it again; the terrain follows the tracks once the laying ends, not after each click of a chain

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Fitting the grade line took 3 ms for 250 m of track, 30 ms for 1 km, 65 ms for 2 km and 200 ms for 4 km, and the preview of the lay tool and of the drag from a free end fitted it every frame, twice for the drag; on the terrain model the preview of some 800 m took 10 to 17 ms a frame, the cursor standing or not. Now the frame waits under 1.5 ms for 4 km. The formations of the tracks led into the terrain went through every chunk under them 0.3 s after each click, some 50 ms, while the cursor went on to the next point; they wait for the laying to end. The tracks laid and the terrain are the same as before.

Selftests: perf logs the longest frame and those over 33 ms, fittime the time of the fit by length, terrainhash a hash of the chunks in memory.
This commit is contained in:
maj00r
2026-10-24 18:00:21 +02:00
parent e35487f767
commit e322947300
12 changed files with 354 additions and 43 deletions
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18
application/editormodeselftestterrain.cpp
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@@ -42,6 +42,7 @@ http://mozilla.org/MPL/2.0/.
#include <chrono>
#include <cstdint>
#include <cstring>
#include <cstdlib>
#include <fstream>
#include <map>
@@ -470,6 +471,23 @@ editor_mode::selftest_result editor_mode::selftest_terrain(std::string const &co
WriteLog("SELFTEST terrainadd: " + m_terrain_status);
return selftest_result::handled;
}
if (command == "terrainhash")
{
// the heights of the chunks in memory hashed, to compare the ground two builds made
std::vector<editor_terrain *> chunks;
m_streamer.collect(chunks);
std::sort(chunks.begin(), chunks.end(), [](editor_terrain const *A, editor_terrain const *B) { return A->key() < B->key(); });
std::uint64_t hash{1469598103934665603ull};
for (auto const *chunk : chunks)
for (auto const height : chunk->heights())
{
std::uint32_t bits;
std::memcpy(&bits, &height, sizeof(bits));
hash = (hash ^ bits) * 1099511628211ull;
}
WriteLog(format("SELFTEST terrainhash: %zu chunks, %016llx", chunks.size(), static_cast<unsigned long long>(hash)));
return selftest_result::handled;
}
if (command == "terrainprobe")
{
double x{0.0};