6850d716a2
Client-side deterministic sky + weather + day/night system per R12. Retail's model is 95% client-side: the server just delivers its current PortalYearTicks (double, seconds since boot-seed) at login and in TimeSync packets; the client computes everything else locally from the constants in r12 §1.2 + ACE DerethDateTime.cs. Core layer (AcDream.Core/World): - DerethDateTime: retail-exact calendar (16 hours/day, 30 days/month, 12 months/year, 7620 ticks/day, 2,743,200 ticks/year). HourName enum covers all 16 named half-hour slots (Darktide → GloamingAndHalf); MonthName covers the 12 Derethian months (Snowreap → Frostfell). DayFraction, CurrentHour, IsDaytime, ToCalendar. - SkyKeyframe + SkyStateProvider: 4-keyframe default day/dawn/noon/dusk with linear color + angular-wrap heading interpolation + slerp-like shortest-arc lerp so heading wraps 350° → 10° don't tween backwards through 180°. Default keyframe colors tuned to retail screenshots (sunrise warm, noon white, sunset red, midnight deep blue). - WorldTimeService: owns the live clock. SyncFromServer(ticks) sets baseline; NowTicks advances by real-time elapsed. Exposes DayFraction, CurrentSky, CurrentSunDirection, IsDaytime for the render thread. This is the foundation Phase G.2 (dynamic lighting) consumes: lighting uniforms are fed from CurrentSky's SunColor / AmbientColor / sun direction, varying smoothly across the day. Tests (16 new): - DerethDateTime: midnight, half-day, wrap, Dawnsong, Midsong, day/night flag at dawn vs Darktide-Half, year rollover, month advance. - SkyState: 4-default keyframes, noon-exact matches frame data, midpoint lerps between neighbours, wrap across midnight doesn't produce NaN, sun direction returns unit vector, WorldTimeService sync + DayFraction at noon. Build green, 587 tests pass (up from 570). Ref: r12 §1 (Portal Year math), §2 (sky objects), §4 (color lerp). Ref: ACE DerethDateTime.cs + NetworkSession TimeSync handler. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
89 lines
2.8 KiB
C#
89 lines
2.8 KiB
C#
using System.Numerics;
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using AcDream.Core.World;
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using Xunit;
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namespace AcDream.Core.Tests.World;
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public sealed class SkyStateTests
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{
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[Fact]
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public void Default_Has4Keyframes()
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{
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var sky = SkyStateProvider.Default();
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Assert.Equal(4, sky.KeyframeCount);
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}
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[Fact]
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public void Interpolate_AtExactKeyframe_ReturnsThatFrameData()
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{
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var sky = SkyStateProvider.Default();
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var noon = sky.Interpolate(0.5f); // noon keyframe
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// Noon sky color should be near white (1.0 ish).
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Assert.InRange(noon.SunColor.X, 0.9f, 1.1f);
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Assert.InRange(noon.SunColor.Y, 0.9f, 1.1f);
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}
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[Fact]
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public void Interpolate_BetweenKeyframes_LerpsColors()
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{
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var sky = SkyStateProvider.Default();
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var dawn = sky.Interpolate(0.25f);
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var noon = sky.Interpolate(0.5f);
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var midPt = sky.Interpolate(0.375f);
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// Midpoint should fall between dawn & noon for sun color Y (green channel).
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float low = System.Math.Min(dawn.SunColor.Y, noon.SunColor.Y);
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float high = System.Math.Max(dawn.SunColor.Y, noon.SunColor.Y);
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Assert.InRange(midPt.SunColor.Y, low, high);
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}
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[Fact]
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public void Interpolate_Wraps_AcrossMidnight()
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{
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var sky = SkyStateProvider.Default();
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var justAfterMidnight = sky.Interpolate(0.01f);
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// Should return finite valid state (not NaN).
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Assert.False(float.IsNaN(justAfterMidnight.SunColor.X));
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Assert.False(float.IsNaN(justAfterMidnight.AmbientColor.X));
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}
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[Fact]
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public void SunDirectionFromKeyframe_ReturnsUnitVector()
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{
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var kf = new SkyKeyframe(
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Begin: 0.5f,
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SunHeadingDeg: 180f, // south
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SunPitchDeg: 70f,
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SunColor: Vector3.One,
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AmbientColor: Vector3.One,
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FogColor: Vector3.One,
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FogDensity: 0.001f);
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var dir = SkyStateProvider.SunDirectionFromKeyframe(kf);
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Assert.InRange(dir.Length(), 0.99f, 1.01f);
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}
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[Fact]
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public void WorldTimeService_SyncFromServer_SetsTicks()
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{
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var service = new WorldTimeService(SkyStateProvider.Default());
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service.SyncFromServer(12345.0);
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// NowTicks advances by real elapsed time; but immediately after
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// sync it should be at or very close to the synced value.
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Assert.InRange(service.NowTicks, 12345.0, 12346.0);
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}
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[Fact]
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public void WorldTimeService_DayFraction_RespectsSync()
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{
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var service = new WorldTimeService(SkyStateProvider.Default());
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// Sync to exactly noon of day 0.
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service.SyncFromServer(DerethDateTime.DayTicks * 0.5);
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Assert.InRange(service.DayFraction, 0.499, 0.501);
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Assert.True(service.IsDaytime);
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}
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}
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