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Ограничить бюджет треугольников для SceneView hover-raycast #187

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SashaRX wants to merge 1 commit into from
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Ограничить бюджет треугольников для SceneView hover-raycast #187

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20 changes: 20 additions & 0 deletions Editor/Tools/LightmapTransferTool.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -199,6 +199,7 @@ static UvtLog.Category[] BuildLogCategoryList()
// ── Scene ──
double sceneSpotLastRaycastTime;
const double sceneSpotThrottleSec = 0.033;
const int sceneSpotTriangleBudget = 12000;

// ════════════════════════════════════════════════════════════
// Lifecycle
Expand Down Expand Up @@ -4710,6 +4711,7 @@ bool TryRaycastPreview(Ray ray, out SceneHit bestHit)
bestHit = default;
bestHit.distance = float.PositiveInfinity;
bool found = false;
int remainingTriangleBudget = sceneSpotTriangleBudget;

foreach (var entry in ctx.ForLod(ctx.PreviewLod))
{
Expand All @@ -4720,10 +4722,28 @@ bool TryRaycastPreview(Ray ray, out SceneHit bestHit)
Bounds wb = TransformBounds(mesh.bounds, l2w);
if (!wb.IntersectRay(ray, out float aabbDist) || aabbDist > bestHit.distance) continue;

// Inspect index metadata before reading mesh arrays: those properties make
// full managed copies and shell extraction is linear in the face count.
// Skip a mesh rather than partially testing it, which could report a false hit.
ulong meshIndexCount = 0;
for (int subMesh = 0; subMesh < mesh.subMeshCount; subMesh++)
{
ulong indexCount = mesh.GetIndexCount(subMesh);
if (indexCount > (ulong)remainingTriangleBudget * 3UL - meshIndexCount)
{
meshIndexCount = ulong.MaxValue;
break;
}
meshIndexCount += indexCount;
}
if (meshIndexCount == ulong.MaxValue) continue;

var v = mesh.vertices;
var tri = canvas.GetTrianglesCached(mesh);
var uv = canvas.RdUvCached(mesh, ctx.PreviewUvChannel);
if (v == null || tri == null || uv == null) continue;
if (tri.Length / 3 > remainingTriangleBudget) continue;
remainingTriangleBudget -= tri.Length / 3;
int[] faceToShell = ctx.UvPreviewShellCache.GetFaceToShell(mesh, ctx.PreviewUvChannel, uv, tri);

for (int f = 0; f + 2 < tri.Length; f += 3)
Expand Down
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