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Gravity grid-lowering: the drawn height is one Gravity Field pass over the zone's wells; gravity brushes and brush inputs deleted

Browse source 
Zone.WellReference owns each body's reference zero (GetHeight uses it). Gravity.cginc mirrors GravityField.Potential;
Brushes/Gravity Field draws depth = -h on layer 9 from a StructuredBuffer that GravityLowering.Lower fills from the
zone each frame; GravityLowering.CreateField makes the one quad. GravityFieldParityVerify renders it and compares every
texel with -Zone.GetHeight (max error 0.0059 u), the gradient with GetForce (0.03 degrees) and the wiring.

Deleted: the Gravity Well children of Planet, Gas Giant, Sun and PlanetOutpost prefabs, Wormhole 1's three gravity
children, their overrides in Main Menu and TestScene, five wormhole/wave materials and two brush shaders,
Planet.GravityWellDepth/Radius, BodyData keys 6-7, PlanetSettings.GravityDepth/GravityRadius (and the Settings.asset
keys). Surface Displacement culls layer 9 only. Headless build and tests not yet run at this commit.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-10-15 07:11:25 +02:00
commit 3a5b3b0bab
42 changed files with 504 additions and 1301 deletions
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BIN
Assets/Resources/Settings.asset (Stored with Git LFS)
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Binary file not shown.

3
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275
Assets/Scripts/Editor/GravityFieldParityVerify.cs Normal file
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@ -0,0 +1,275 @@
using System;
using System.IO;
using System.Linq;
using GameCult.Caching;
using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine;
using UnityEngine.Rendering;
using CultMath;
namespace Aetheria.EditorTools
{
/// <summary>
/// Batchmode check for campaign aetheria-gravity, cut grid-lowering: what the Gravity Field pass draws is the sim's
/// height. It builds a zone from Settings.asset's PlanetSettings with three bodies, runs the real lowering
/// (GravityLowering.Lower and CreateField), renders the field through an orthographic camera that culls layer 9 into
/// a float target, and compares every texel with -Zone.GetHeight at the texel centre's world position. It then checks
/// that the texture's gradient points where Zone.GetForce does, and that ARPG.unity and the body prefabs are wired
/// the way the cut leaves them (the gravity cameras cull layer 9 alone, nothing but the run-time field sits on it).
///
/// Renders, so it needs a graphics device: run WITHOUT -nographics (as FlowFieldParityVerify).
/// Unity -batchmode -projectPath &lt;repo&gt; -executeMethod Aetheria.EditorTools.GravityFieldParityVerify.Run -logFile &lt;path&gt;
/// Do not pass -quit: Run exits the Editor itself, 0 on success and 1 on any failure.
/// </summary>
public static class GravityFieldParityVerify
{
const string Tag = "[GravityFieldParityVerify]";
const int Size = 256;
// Measured on this tree (the "max error" line this run prints): the largest |texel + GetHeight| over the three
// windows is 0.0059 u, in the planetoid's window (float32 on both sides, the GPU's log against the CPU's, the
// quad's interpolated world position). The tolerance is 5x that. A 0.1% error in the tail constant (.5 -> .501)
// moves the drawn height by 0.053 u where all three tails reach (the planetoid and zone windows), 1.8x the
// tolerance; a reference of zero moves it by about 150 u.
const float Tolerance = 0.03f;
// The worst angle between the texture's central difference and GetForce (B28: 1.0 degrees median zone, 2.9 worst).
const float GradientDegrees = 3f;
static float _maxError, _maxAngle;
static bool _ok = true;
static void OnLog(string message, string stack, LogType type)
{
if ((type == LogType.Error || type == LogType.Exception || type == LogType.Assert) && !message.StartsWith(Tag))
Fail("logged-error", message.Split('\n')[0]);
}
static void Fail(string check, string detail)
{
Debug.LogError($"{Tag} FAIL {check}: {detail}");
_ok = false;
}
public static void Run()
{
if (SystemInfo.graphicsDeviceType == GraphicsDeviceType.Null)
{
Debug.LogError($"{Tag} FAIL: no graphics device in this session; rerun batchmode without -nographics.");
EditorApplication.Exit(1);
return;
}
Application.logMessageReceived += OnLog;
var work = Path.Combine(Path.GetTempPath(), "gravity-parity-" + Guid.NewGuid().ToString("N"));
Directory.CreateDirectory(work);
ComputeBuffer wells = null;
GameObject field = null;
try
{
var settings = AssetDatabase.LoadAssetAtPath<GameSettings>("Assets/Resources/Settings.asset")
?? throw new InvalidOperationException("No Settings.asset.");
var material = AssetDatabase.LoadAssetAtPath<Material>("Assets/Materials/Brushes/Gravity Field.mat")
?? throw new InvalidOperationException("No Gravity Field.mat.");
var zone = BuildZone(settings, work, out var bodies);
GravityLowering.Lower(zone, ref wells);
field = GravityLowering.CreateField(material);
var sun = Core(zone, 14152f);
var planetoid = Core(zone, 29.2f);
CheckTexels("planetoid", zone, bodies[2], 4f * planetoid);
CheckTexels("sun", zone, bodies[0], 4f * sun);
CheckTexels("zone", zone, new Vector2(0f, 0f), 1.05f * zone.Pack.Radius);
CheckGradient(zone, bodies);
Debug.Log($"{Tag} max error {_maxError:G4} u (tolerance {Tolerance:G4}); max gradient angle {_maxAngle:F2} degrees (limit {GradientDegrees:F0})");
CheckWiring(settings);
Debug.Log(_ok ? $"{Tag} PASS" : $"{Tag} FAIL: see errors above");
}
catch (Exception e)
{
Debug.LogError($"{Tag} FAIL exception: {e}");
_ok = false;
}
finally
{
Application.logMessageReceived -= OnLog;
if (field != null) UnityEngine.Object.DestroyImmediate(field);
wells?.Release();
try { Directory.Delete(work, true); } catch { }
}
EditorApplication.Exit(_ok ? 0 : 1);
}
static float Core(Zone zone, float mass) => zone.Settings.CoreRadius.Evaluate(mass);
// A sun (14152 at the origin), a planet (273.9 at 610) and a planetoid (29.2 at 670): parentless, fixed, so the
// zone's wells sit where the verify says before any Update.
static Zone BuildZone(GameSettings settings, string work, out Vector2[] positions)
{
var cache = AetheriaStores.Open(Path.Combine(work, "catalog.cc"), Path.Combine(work, "run.cc"), catalogWritable: true);
cache.Upsert(new VerseGrammar { Revision = 1 });
cache.FlushAsync().Wait();
var items = new ItemManager(cache, new ProvenanceLedger(), settings.GameplaySettings, _ => { });
positions = new[] { new Vector2(0f, 0f), new Vector2(610f, 0f), new Vector2(670f, 0f) };
var masses = new[] { 14152f, 273.9f, 29.2f };
var pack = new ZonePack { Radius = 4182f };
for (var i = 0; i < positions.Length; i++)
{
var orbit = cache.Upsert(new OrbitData { FixedPosition = new float2(positions[i].x, positions[i].y) }).Key;
var body = cache.Upsert(new PlanetData
{ Name = "Body " + i, Orbit = new CultRecordRef<OrbitData>(orbit), Mass = masses[i] }).Key;
pack.Orbits.Add(new CultRecordRef<OrbitData>(orbit));
pack.Planets.Add(new CultRecordRef<BodyData>(body));
}
return new Zone(items, settings.PlanetSettings, pack, new GalaxyZone { Name = "Gravity Parity", Owner = null }, null);
}
// Renders the field through a downward orthographic camera that culls layer 9 only, centred on `centre` with
// half-size `half`, and returns the depth of every texel with the world xz of the texel's centre, which is asked
// of the camera rather than assumed.
static void Render(Vector2 centre, float half, out float[] depth, out Vector2[] world)
{
var rt = new RenderTexture(Size, Size, 0, RenderTextureFormat.RFloat) { filterMode = FilterMode.Point };
var cameraObject = new GameObject("Gravity Parity Camera");
var read = new Texture2D(Size, Size, TextureFormat.RFloat, false);
var previous = RenderTexture.active;
try
{
var camera = cameraObject.AddComponent<Camera>();
camera.orthographic = true;
camera.orthographicSize = half;
camera.aspect = 1f;
camera.nearClipPlane = .3f;
camera.farClipPlane = 1000f;
camera.cullingMask = 1 << GravityLowering.FieldLayer;
camera.clearFlags = CameraClearFlags.SolidColor;
camera.backgroundColor = Color.black;
camera.allowHDR = false;
camera.allowMSAA = false;
camera.targetTexture = rt;
cameraObject.transform.SetPositionAndRotation(new Vector3(centre.x, 100f, centre.y), Quaternion.Euler(90f, 0f, 0f));
camera.Render();
RenderTexture.active = rt;
read.ReadPixels(new Rect(0, 0, Size, Size), 0, 0);
read.Apply();
depth = read.GetPixelData<float>(0).ToArray();
world = new Vector2[Size * Size];
for (var y = 0; y < Size; y++)
for (var x = 0; x < Size; x++)
{
var p = camera.ViewportToWorldPoint(new Vector3((x + .5f) / Size, (y + .5f) / Size, 100f));
world[y * Size + x] = new Vector2(p.x, p.z);
}
}
finally
{
RenderTexture.active = previous;
UnityEngine.Object.DestroyImmediate(cameraObject);
UnityEngine.Object.DestroyImmediate(read);
rt.Release();
UnityEngine.Object.DestroyImmediate(rt);
}
}
static void CheckTexels(string window, Zone zone, Vector2 centre, float half)
{
Render(centre, half, out var depth, out var world);
var worst = 0f;
var live = 0;
for (var i = 0; i < depth.Length; i++)
{
var expected = -zone.GetHeight(new float2(world[i].x, world[i].y));
if (float.IsNaN(depth[i])) { Fail($"{window}-texels", $"texel {i}: NaN"); return; }
var error = Math.Abs(depth[i] - expected);
worst = Math.Max(worst, error);
if (Math.Abs(expected) > 1f) live++;
if (error > Tolerance)
{
Fail($"{window}-texels", $"texel {i} at ({world[i].x:F2}, {world[i].y:F2}): expected {expected:G6}, drawn {depth[i]:G6}, error {error:G4} > {Tolerance:G4}");
return;
}
}
_maxError = Math.Max(_maxError, worst);
// A window that draws nothing agrees with a zone that is flat: the check must be live.
if (live < depth.Length / 2) Fail($"{window}-texels", $"only {live} of {depth.Length} texels are deeper than 1 u; the check is vacuous");
Debug.Log($"{Tag} {window}: {depth.Length} texels, max error {worst:G4} u");
}
// The texture's central difference (over two 4 u texels, mid-zone) points where GetForce does: depth = -h, so its
// gradient is the force over the exaggeration. This is what the slope readers (the shader's slopeFlow, the nebula
// surface normal, the drawn grid) take from the texture.
static void CheckGradient(Zone zone, Vector2[] bodies)
{
Render(new Vector2(1500f, 0f), 512f, out var depth, out var world);
var compared = 0;
for (var y = 1; y < Size - 1; y++)
for (var x = 1; x < Size - 1; x++)
{
var here = world[y * Size + x];
if (bodies.Any(b => (b - here).magnitude < 16f)) continue;
// The world step of each texel axis is read from the camera, so a flipped or rotated target is still measured.
var au = world[y * Size + x + 1] - world[y * Size + x - 1];
var av = world[(y + 1) * Size + x] - world[(y - 1) * Size + x];
var du = depth[y * Size + x + 1] - depth[y * Size + x - 1];
var dv = depth[(y + 1) * Size + x] - depth[(y - 1) * Size + x];
var det = au.x * av.y - au.y * av.x;
var g = new Vector2((du * av.y - dv * au.y) / det, (dv * au.x - du * av.x) / det);
var f = zone.GetForce(new float2(here.x, here.y));
var angle = Vector2.Angle(g, new Vector2(f.x, f.y));
if (float.IsNaN(angle) || angle > GradientDegrees)
{
Fail("gradient", $"at ({here.x:F1}, {here.y:F1}) the drawn slope points {angle:F2} degrees from the force (limit {GradientDegrees:F0})");
return;
}
_maxAngle = Math.Max(_maxAngle, angle);
compared++;
}
if (compared < Size * Size / 2) Fail("gradient", $"only {compared} texels were compared");
}
static void CheckWiring(GameSettings settings)
{
var scene = EditorSceneManager.OpenScene("Assets/Scenes/ARPG.unity", OpenSceneMode.Single);
try
{
var gravityTargets = new[] { "Fog Surface Displacement", "Slime Gravity", "MinimapGravity" };
var seen = 0;
foreach (var camera in UnityEngine.Object.FindObjectsByType<Camera>(FindObjectsInactive.Include, FindObjectsSortMode.None))
{
if (camera.targetTexture == null || !gravityTargets.Contains(camera.targetTexture.name)) continue;
seen++;
if (camera.cullingMask != 1 << GravityLowering.FieldLayer)
Fail("wiring", $"camera {camera.name} (target {camera.targetTexture.name}) culls mask {camera.cullingMask}, not layer {GravityLowering.FieldLayer} alone");
}
if (seen < gravityTargets.Length) Fail("wiring", $"only {seen} gravity cameras found in ARPG.unity");
var renderer = UnityEngine.Object.FindFirstObjectByType<ZoneRenderer>(FindObjectsInactive.Include);
if (renderer == null) Fail("wiring", "no ZoneRenderer in ARPG.unity");
else if (renderer.GravityField == null || renderer.GravityField.shader.name != "Brushes/Gravity Field")
Fail("wiring", "ZoneRenderer.GravityField is not a Brushes/Gravity Field material");
foreach (var r in UnityEngine.Object.FindObjectsByType<Renderer>(FindObjectsInactive.Include, FindObjectsSortMode.None))
if (r.gameObject.layer == GravityLowering.FieldLayer)
Fail("wiring", $"renderer {r.name} in ARPG.unity sits on layer {GravityLowering.FieldLayer}");
}
finally
{
EditorSceneManager.NewScene(NewSceneSetup.EmptyScene, NewSceneMode.Single);
}
foreach (var path in new[]
{
"Assets/Prefabs/RPG/Planets/Planet.prefab", "Assets/Prefabs/RPG/Planets/Gas Giant.prefab",
"Assets/Prefabs/RPG/Planets/Sun.prefab", "Assets/Prefabs/RPG/Wormhole 1.prefab"
})
{
var prefab = AssetDatabase.LoadAssetAtPath<GameObject>(path);
if (prefab == null) { Fail("wiring", $"no prefab at {path}"); continue; }
foreach (var r in prefab.GetComponentsInChildren<Renderer>(true))
if (r.gameObject.layer == GravityLowering.FieldLayer)
Fail("wiring", $"renderer {r.name} in {path} sits on layer {GravityLowering.FieldLayer}");
}
}
}
}

11
Assets/Scripts/Editor/GravityFieldParityVerify.cs.meta Normal file
View file

@ -0,0 +1,11 @@
fileFormatVersion: 2
guid: 1ceb2bdab0804463b1998471d47e82fa
MonoImporter:
externalObjects: {}
serializedVersion: 2
defaultReferences: []
executionOrder: 0
icon: {instanceID: 0}
userData:
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assetBundleVariant:

2
Assets/Scripts/ServerShared/Settings.cs
View file

@ -13,8 +13,6 @@ using static CultMath.math;
[Serializable, MessagePackObject(keyAsPropertyName:true), JsonObject]
public class PlanetSettings
{
public ExponentialCurve GravityDepth;
public ExponentialCurve GravityRadius;
public ExponentialCurve LightRadius;
public ExponentialCurve BodyRadius;

12
Assets/Scripts/ServerShared/Zone.cs
View file

@ -612,14 +612,17 @@ public class Zone
return security;
}
// The potential of a body's well at the zone's edge, subtracted so every well is zero there: the one owner of the
// reference. GetHeight sums with it and the renderer's lowering (GravityLowering) hands it to the shader unchanged.
public float WellReference(Planet body) => GravityField.Potential(body.WellStrength, body.CoreRadius, Pack.Radius);
public float GetHeight(float2 position)
{
var result = 0f;
foreach (var body in PlanetInstances.Values)
{
var offset = position - body.Orbit.Position;
result += GravityField.Potential(body.WellStrength, body.CoreRadius, length(offset))
- GravityField.Potential(body.WellStrength, body.CoreRadius, Pack.Radius);
result += GravityField.Potential(body.WellStrength, body.CoreRadius, length(offset)) - WellReference(body);
}
return result / Settings.HeightExaggeration;
@ -685,9 +688,6 @@ public class Planet
public Orbit Orbit;
protected readonly PlanetSettings Settings;
public BodyData BodyData;
// Brush inputs only (ZoneRenderer's Gravity Well brushes and planet icon); no sim reader. grid-lowering deletes them.
public float GravityWellDepth;
public float GravityWellRadius;
public float BodyRadius;
// The well (GravityField): strength c and softened core radius R by mass, and the Roche limit, the closest a child
@ -707,8 +707,6 @@ public class Planet
public void CalculateProperties()
{
BodyRadius = Settings.BodyRadius.Evaluate(BodyData.Mass) * BodyData.BodyRadiusMultiplier;
GravityWellRadius = Settings.GravityRadius.Evaluate(BodyData.Mass) * BodyData.GravityRadiusMultiplier;
GravityWellDepth = Settings.GravityDepth.Evaluate(BodyData.Mass) * BodyData.GravityDepthMultiplier;
WellStrength = Settings.WellStrength.Evaluate(BodyData.Mass);
CoreRadius = Settings.CoreRadius.Evaluate(BodyData.Mass);
RocheLimit = Settings.RocheLimit.Evaluate(BodyData.Mass);

6
Assets/Scripts/ServerShared/ZoneData.cs
View file

@ -86,12 +86,6 @@ public abstract class BodyData
[JsonProperty("bodyRadiusMul")] [Key(5)]
public float BodyRadiusMultiplier = 1;
[JsonProperty("gravRadiusMul")] [Key(6)]
public float GravityRadiusMultiplier = 1;
[JsonProperty("depthMul")] [Key(7)]
public float GravityDepthMultiplier = 1;
}
[CultDocument("aetheria.planetdata", "1"), MessagePackObject, JsonObject(MemberSerialization.OptIn)]

78
Assets/Scripts/Zone Display/GravityLowering.cs Normal file
View file

@ -0,0 +1,78 @@
using System.Runtime.InteropServices;
using UnityEngine;
/// <summary>
/// The renderer's lowering of the zone's potential (aetheria-gravity, cut grid-lowering). Zone.GetHeight owns the drawn
/// height: this hands its inputs (each well's position, strength, core radius and reference, and the exaggeration) to
/// Assets/Shaders/Gravity.cginc, which sums them per texel, and makes the one quad that carries the sum into every
/// camera that culls layer 9. Nothing here decides a height.
/// </summary>
public static class GravityLowering
{
/// <summary>The layer the gravity cameras cull; nothing but the run-time field sits on it.</summary>
public const int FieldLayer = 9;
/// <summary>The quad's side in u: larger than any zone (10000) plus any view (4096); texels outside a camera cost nothing.</summary>
public const float FieldExtent = 100000f;
// Mirrors Gravity.cginc's GravityWell: float2 position, strength, coreRadius, reference.
[StructLayout(LayoutKind.Sequential)]
struct WellRecord
{
public Vector2 Position;
public float Strength;
public float CoreRadius;
public float Reference;
}
static readonly int Stride = Marshal.SizeOf<WellRecord>();
static readonly int WellsId = Shader.PropertyToID("_GravityWells");
static readonly int CountId = Shader.PropertyToID("_GravityWellCount");
static readonly int ExaggerationId = Shader.PropertyToID("_HeightExaggeration");
static WellRecord[] _records = new WellRecord[0];
/// <summary>
/// Fills one record per body of the zone (a null zone has none) and sets the shader globals. The buffer is the
/// caller's, (re)allocated to the body count (at least one, so the global is always bound).
/// </summary>
public static void Lower(Zone zone, ref ComputeBuffer wells)
{
var count = zone?.PlanetInstances.Count ?? 0;
var capacity = Mathf.Max(count, 1);
if (wells == null || wells.count != capacity)
{
wells?.Release();
wells = new ComputeBuffer(capacity, Stride);
}
if (_records.Length != capacity) _records = new WellRecord[capacity];
var i = 0;
if (zone != null)
foreach (var body in zone.PlanetInstances.Values)
_records[i++] = new WellRecord
{
Position = new Vector2(body.Orbit.Position.x, body.Orbit.Position.y),
Strength = body.WellStrength,
CoreRadius = body.CoreRadius,
Reference = zone.WellReference(body)
};
wells.SetData(_records);
Shader.SetGlobalBuffer(WellsId, wells);
Shader.SetGlobalInt(CountId, count);
Shader.SetGlobalFloat(ExaggerationId, zone?.Settings.HeightExaggeration ?? 1f);
}
/// <summary>The one quad of the field: flat in xz at y 0 on layer 9, drawn with the Gravity Field material.</summary>
public static GameObject CreateField(Material material)
{
var field = new GameObject("Gravity Field") { layer = FieldLayer };
field.transform.rotation = Quaternion.Euler(90f, 0f, 0f);
field.transform.localScale = FieldExtent * Vector3.one;
field.AddComponent<MeshFilter>().sharedMesh = Resources.GetBuiltinResource<Mesh>("Quad.fbx");
var renderer = field.AddComponent<MeshRenderer>();
renderer.sharedMaterial = material;
renderer.shadowCastingMode = UnityEngine.Rendering.ShadowCastingMode.Off;
renderer.receiveShadows = false;
return field;
}
}

11
Assets/Scripts/Zone Display/GravityLowering.cs.meta Normal file
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@ -0,0 +1,11 @@
fileFormatVersion: 2
guid: 1a5e08474b514e509ed1477b3ac06e94
MonoImporter:
externalObjects: {}
serializedVersion: 2
defaultReferences: []
executionOrder: 0
icon: {instanceID: 0}
userData:
assetBundleName:
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1
Assets/Scripts/Zone Display/PlanetObject.cs
View file

@ -9,7 +9,6 @@ using UnityEngine;
public class PlanetObject : MonoBehaviour
{
public MeshRenderer Body;
public MeshRenderer GravityWell;
public MeshRenderer Icon;
public CelestialBodyGenerator Generator;
}

21
Assets/Scripts/Zone Display/ZoneRenderer.cs
View file

@ -46,6 +46,8 @@ public class ZoneRenderer : MonoBehaviour
public MineInstance MinePrefab;
public VapourCloudInstance CloudPrefab;
public Material[] MapGravityMaterials;
// The gravity field's material (Brushes/Gravity Field): GravityLowering makes the one quad that draws it.
public Material GravityField;
[Header("Tour")] public bool Tour;
public float TourSwitchTime = 5f;
@ -77,7 +79,8 @@ public class ZoneRenderer : MonoBehaviour
// is stored on AsteroidBelt any more.
private Dictionary<CultRecordKey, float4[]> _beltTransforms = new Dictionary<CultRecordKey, float4[]>();
private float _viewDistance;
//private float _maxDepth;
private GameObject _gravityField;
private ComputeBuffer _gravityWells;
private float _minimapDistance;
private int _tourIndex = -1;
@ -195,6 +198,7 @@ public class ZoneRenderer : MonoBehaviour
SectorBrushes.localScale = zone.Pack.Radius * 2 * Vector3.one;
SlimeGravityCamera.orthographicSize = zone.Pack.Radius;
SlimeRenderer.ZoneRadius = zone.Pack.Radius;
if (_gravityField == null) _gravityField = GravityLowering.CreateField(GravityField);
foreach (var p in zone.Planets)
LoadPlanet(p.Key, p.Value);
@ -321,9 +325,17 @@ public class ZoneRenderer : MonoBehaviour
WormholeInstances.Add(wormhole, (instance.gameObject, icon));
}
void OnDestroy()
{
_gravityWells?.Release();
_gravityWells = null;
}
public void ClearZone()
{
if (Zone == null) return;
_gravityWells?.Release();
_gravityWells = null;
foreach (var wormhole in WormholeInstances.Values)
{
Destroy(wormhole.gravity);
@ -491,11 +503,6 @@ public class ZoneRenderer : MonoBehaviour
var planetInstance = Zone.PlanetInstances[key];
planet.Body.transform.localScale = planetInstance.BodyRadius * Vector3.one;
planet.GravityWell.transform.localScale = planetInstance.GravityWellRadius * Vector3.one;
// var depth = planetInstance.GravityWellDepth;
// if (depth > _maxDepth) _maxDepth = depth;
planet.GravityWell.material.SetFloat("_Depth", planetInstance.GravityWellDepth);
planet.Icon.transform.position = new Vector3(0, -planetInstance.GravityWellDepth, 0);
planet.Icon.transform.localScale = Settings.IconSize.Evaluate(planetInstance.BodyData.Mass) * Vector3.one;
@ -513,6 +520,7 @@ public class ZoneRenderer : MonoBehaviour
void Update()
{
var maxDepth = 0f;
GravityLowering.Lower(Zone, ref _gravityWells);
foreach (var loot in _floatingItems.Values)
{
loot.ViewOrigin = PerspectiveEntity.Position;
@ -576,6 +584,7 @@ public class ZoneRenderer : MonoBehaviour
if (-height > maxDepth) maxDepth = -height;
planet.Value.transform.position = new Vector3(p.x, 0, p.y);
planet.Value.Body.transform.localPosition = new Vector3(0, height + planetInstance.BodyRadius * 2, 0);
planet.Value.Icon.transform.localPosition = new Vector3(0, height, 0);
if (planet.Value is GasGiantObject gasGiantObject)
{
if (!(planet.Value is SunObject))

47
Assets/Shaders/Brushes/GravityField.shader Normal file
View file

@ -0,0 +1,47 @@
// Draws the zone's gravity: depth = -Zone.GetHeight at the world xz of every texel, into whichever gravity camera culls
// layer 9 (Surface Displacement, Patch Displacement, Slime Gravity, both Map Gravity). One quad covers the zone; the
// law lives in Gravity.cginc, which mirrors ServerShared's GravityField.
Shader "Brushes/Gravity Field" {
Category {
Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" }
Blend One One
ColorMask RGB
Cull Off Lighting Off ZWrite Off
SubShader {
Pass {
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma target 4.5
#include "UnityCG.cginc"
#include "../Gravity.cginc"
struct appdata_t {
float4 vertex : POSITION;
};
struct v2f {
float4 vertex : SV_POSITION;
float2 world : TEXCOORD0;
};
v2f vert (appdata_t v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.world = mul(unity_ObjectToWorld, v.vertex).xz;
return o;
}
float4 frag (v2f i) : SV_Target
{
return (-gravityHeight(i.world)).xxxx;
}
ENDCG
}
}
}
}

2
Assets/Shaders/Brushes/RadialWaveBrush.shader.meta → Assets/Shaders/Brushes/GravityField.shader.meta
View file

@ -1,5 +1,5 @@
fileFormatVersion: 2
guid: 8a8e593b17063b54ea02f7ea5363b59d
guid: 08d8efa80af84065b54c9bfed784e435
ShaderImporter:
externalObjects: {}
defaultTextures: []

81
Assets/Shaders/Brushes/RadialWaveBrush.shader
View file

@ -1,81 +0,0 @@
Shader "Brushes/Radial Wave Brush" {
Properties {
_Depth ("Depth", Float) = 0.5
_Power("Envelope Power", Float) = 1.25
_Frequency("Frequency", Float) = 6.2832
_Phase("Phase", Float) = 0
_SinePower("Sine Power", Float) = 1.25
}
Category {
Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" }
Blend One One
ColorMask RGB
Cull Off Lighting Off ZWrite Off
SubShader {
Pass {
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma target 2.0
#include "UnityCG.cginc"
float _Depth;
float _Power;
float _Frequency;
float _Phase;
float _SinePower;
struct appdata_t {
float4 vertex : POSITION;
fixed4 color : COLOR;
float2 texcoord : TEXCOORD0;
};
struct v2f {
float4 vertex : SV_POSITION;
fixed4 color : COLOR;
float2 texcoord : TEXCOORD0;
};
float4 _MainTex_ST;
v2f vert (appdata_t v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.color = v.color;
o.texcoord = v.texcoord;
return o;
}
float almostIdentity(float x, float m, float n)
{
if (x>m) return x;
const float a = 2.0f*n - m;
const float b = 2.0f*m - 3.0f*n;
const float t = x / m;
return (a*t + b)*t*t + n;
}
float powerPulse( float x, float power )
{
x = saturate(abs(x));
return pow((x + 1.0f) * (1.0f - x), power);
}
fixed4 frag (v2f i) : SV_Target
{
float dist = length(i.texcoord - float2(.5,.5)) * 2;
return _Depth * powerPulse(dist,_Power) * cos(pow(dist, _SinePower)*_Frequency+_Phase);
}
ENDCG
}
}
}
}

85
Assets/Shaders/Brushes/WormholeBrush.shader
View file

@ -1,85 +0,0 @@
Shader "Brushes/Wormhole Brush" {
Properties {
_Depth ("Depth", Float) = 0.5
_Power("Envelope Power", Float) = 1.25
_Frequency("Frequency", Float) = 6.2832
_FrequencyDist("Distance Frequency", Float) = 6.2832
_Speed("Speed", Float) = 0
_SinePower("Sine Power", Float) = 1.25
}
Category {
Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" }
Blend One One
ColorMask RGB
Cull Off Lighting Off ZWrite Off
SubShader {
Pass {
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma target 2.0
#include "UnityCG.cginc"
float _Depth;
float _Power;
float _Frequency;
float _FrequencyDist;
float _Speed;
float _SinePower;
struct appdata_t {
float4 vertex : POSITION;
fixed4 color : COLOR;
float2 texcoord : TEXCOORD0;
};
struct v2f {
float4 vertex : SV_POSITION;
fixed4 color : COLOR;
float2 texcoord : TEXCOORD0;
};
float4 _MainTex_ST;
v2f vert (appdata_t v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.color = v.color;
o.texcoord = v.texcoord;
return o;
}
float almostIdentity(float x, float m, float n)
{
if (x>m) return x;
const float a = 2.0f*n - m;
const float b = 2.0f*m - 3.0f*n;
const float t = x / m;
return (a*t + b)*t*t + n;
}
float powerPulse( float x, float power )
{
x = saturate(abs(x));
return pow((x + 1.0f) * (1.0f - x), power);
}
fixed4 frag (v2f i) : SV_Target
{
float2 uv2 = i.texcoord - float2(.5,.5);
float dist = length(uv2);
float ang = atan2(uv2.y,uv2.x);
return _Depth * powerPulse(dist * 2,_Power) * (cos(ang*_Frequency+pow(dist, _SinePower)*_FrequencyDist+_Time.x*_Speed)+1);
}
ENDCG
}
}
}
}

42
Assets/Shaders/Gravity.cginc Normal file
View file

@ -0,0 +1,42 @@
#ifndef AETHERIA_GRAVITY_INCLUDED
#define AETHERIA_GRAVITY_INCLUDED
// The lowering of the zone's potential (aetheria-gravity, cut grid-lowering). The law is ServerShared's GravityField
// and the height is Zone.GetHeight; this file mirrors them and decides nothing. GravityLowering.Lower fills the
// buffer and the globals from the zone (positions from Orbit.Position, reference from Zone.WellReference) each frame.
// GravityFieldParityVerify renders it and compares every texel with -Zone.GetHeight.
struct GravityWell
{
float2 position;
float strength;
float coreRadius;
float reference;
};
StructuredBuffer<GravityWell> _GravityWells;
int _GravityWellCount;
float _HeightExaggeration;
// GravityField.Potential, line for line: c is the well's strength, R its core radius, r the distance.
float gravityPotential(float c, float R, float r)
{
return c == 0 ? 0 :
r < R
? c * r * r / (2 * R * R)
: c * (log(r / R) + .5);
}
// Zone.GetHeight at world xz: each well's potential minus its own reference, summed, divided by the exaggeration.
float gravityHeight(float2 p)
{
float result = 0;
for (int i = 0; i < _GravityWellCount; i++)
{
GravityWell well = _GravityWells[i];
result += gravityPotential(well.strength, well.coreRadius, length(p - well.position)) - well.reference;
}
return result / _HeightExaggeration;
}
#endif

3
Assets/Shaders/Brushes/WormholeBrush.shader.meta → Assets/Shaders/Gravity.cginc.meta
View file

@ -1,10 +1,9 @@
fileFormatVersion: 2
guid: 8681ac064d59d15458d16cc9b884262c
guid: b8f69df89fde433c8263115c25267a10
ShaderImporter:
externalObjects: {}
defaultTextures: []
nonModifiableTextures: []
preprocessorOverride: 0
userData:
assetBundleName:
assetBundleVariant:

12
tests/Aetheria.Shared.Tests/GravitySubtractTests.cs
View file

@ -46,8 +46,6 @@ public sealed class GravitySubtractTests : IDisposable
CoreRadius = new ExponentialCurve { Exponent = .25f, Multiplier = 3f },
RocheLimit = new ExponentialCurve { Exponent = .25f, Multiplier = 7.32f },
BodyRadius = new ExponentialCurve { Exponent = .25f, Multiplier = 3f },
GravityRadius = new ExponentialCurve { Exponent = .25f, Multiplier = 500f },
GravityDepth = new ExponentialCurve { Exponent = .175f, Multiplier = 30f },
LightRadius = new ExponentialCurve { Exponent = .25f, Multiplier = 300f },
OrbitPeriod = new ExponentialCurve()
};
@ -81,8 +79,6 @@ public sealed class GravitySubtractTests : IDisposable
var orbit = _cache.Upsert(new OrbitData { FixedPosition = float2.zero }).Key;
data.Orbit = new CultRecordRef<OrbitData>(orbit);
data.Mass = 100f;
data.GravityRadiusMultiplier = 1.5f;
data.GravityDepthMultiplier = .7f;
var body = _cache.Upsert(data).Key;
var pack = new ZonePack { Radius = PackRadius };
pack.Orbits.Add(new CultRecordRef<OrbitData>(orbit));
@ -133,9 +129,9 @@ public sealed class GravitySubtractTests : IDisposable
private float _clock;
private const float PackRadius = 1000f;
// CultCache has no primitive for reserving a removed MessagePack key. Key 8 of a body record (its former well
// exponent) and the wave keys of the gas giants (14-17) must not come back with a different meaning, because
// stored records may still carry them. Every record type that is a BodyData is checked, bases walked, so a giant
// CultCache has no primitive for reserving a removed MessagePack key. Keys 6 and 7 of a body record (its former
// brush multipliers), key 8 (its former well exponent) and the wave keys of the gas giants (14-17) must not come back
// with a different meaning, because stored records may still carry them. Every record type that is a BodyData is checked, bases walked, so a giant
// kind added later (the sun is one) cannot take them.
[Fact]
public void ABodyRecordNeverReusesRetiredKeys()
@ -157,7 +153,7 @@ public sealed class GravitySubtractTests : IDisposable
{
var keys = KeysOf(type);
Assert.NotEmpty(keys);
Assert.DoesNotContain(8, keys);
foreach (var retired in new[] { 6, 7, 8 }) Assert.DoesNotContain(retired, keys);
if (typeof(GasGiantData).IsAssignableFrom(type))
foreach (var retired in new[] { 14, 15, 16, 17 }) Assert.DoesNotContain(retired, keys);
}

6
tests/Aetheria.Shared.Tests/MiningCut2Tests.cs
View file

@ -44,10 +44,8 @@ public sealed class MiningCut2Tests : IDisposable
AsteroidSize = new ExponentialLerp { Minimum = 2f, Maximum = 9f, Exponent = 1.7f },
AsteroidHitpoints = new ExponentialLerp { Minimum = 20f, Maximum = 220f, Exponent = 1.6f },
AsteroidRespawnTime = new ExponentialLerp { Minimum = 8f, Maximum = 96f, Exponent = 1.2f },
// The zone builds a Planet for the fixture's non-belt body; its constructor reads these three.
BodyRadius = new ExponentialCurve(),
GravityRadius = new ExponentialCurve(),
GravityDepth = new ExponentialCurve()
// The zone builds a Planet for the fixture's non-belt body; its constructor reads this.
BodyRadius = new ExponentialCurve()
};
private sealed class Fixture

2
tests/Aetheria.Shared.Tests/MiningCut3Tests.cs
View file

@ -56,8 +56,6 @@ public sealed partial class MiningCut3Tests : IDisposable
AsteroidHitpoints = new ExponentialLerp { Minimum = 20f, Maximum = 220f, Exponent = 1.6f },
AsteroidRespawnTime = new ExponentialLerp { Minimum = 8f, Maximum = 96f, Exponent = 1.2f },
BodyRadius = new ExponentialCurve(),
GravityRadius = new ExponentialCurve(),
GravityDepth = new ExponentialCurve(),
LightRadius = new ExponentialCurve { Constant = lightRadius }
};

17
tests/Aetheria.Shared.Tests/PotentialOwnerTests.cs
View file

@ -47,7 +47,6 @@ public sealed class PotentialOwnerTests : IDisposable
CoreRadius = new ExponentialCurve { Exponent = .25f, Multiplier = 3f },
RocheLimit = new ExponentialCurve { Exponent = .25f, Multiplier = 7.32f },
BodyRadius = new ExponentialCurve { Exponent = .25f, Multiplier = 2f },
GravityRadius = new ExponentialCurve(), GravityDepth = new ExponentialCurve(),
LightRadius = new ExponentialCurve(), OrbitPeriod = new ExponentialCurve(),
HeightExaggeration = exaggeration
};
@ -84,7 +83,7 @@ public sealed class PotentialOwnerTests : IDisposable
{
var planets = new PlanetSettings
{
BodyRadius = new ExponentialCurve(), GravityRadius = new ExponentialCurve(), GravityDepth = new ExponentialCurve(),
BodyRadius = new ExponentialCurve(),
LightRadius = new ExponentialCurve(), OrbitPeriod = new ExponentialCurve()
};
var zone = ZoneOf(planets, (100f, float2.zero), (5000f, new float2(200f, 0f)));
@ -139,7 +138,6 @@ public sealed class PotentialOwnerTests : IDisposable
CoreRadius = new ExponentialCurve { Constant = core },
RocheLimit = new ExponentialCurve { Constant = roche },
BodyRadius = new ExponentialCurve { Constant = 10f },
GravityRadius = new ExponentialCurve(), GravityDepth = new ExponentialCurve(),
LightRadius = new ExponentialCurve(), OrbitPeriod = new ExponentialCurve()
};
Assert.Throws<InvalidOperationException>(() => ZoneOf(Constants(60f, 50f), (100f, float2.zero)));
@ -161,7 +159,6 @@ public sealed class PotentialOwnerTests : IDisposable
CoreRadius = new ExponentialCurve { Multiplier = coreMultiplier, Exponent = coreExponent },
RocheLimit = new ExponentialCurve { Multiplier = rocheMultiplier, Exponent = rocheExponent },
BodyRadius = new ExponentialCurve { Constant = 1f },
GravityRadius = new ExponentialCurve(), GravityDepth = new ExponentialCurve(),
LightRadius = new ExponentialCurve(), OrbitPeriod = new ExponentialCurve()
};
var threw = 0;
@ -212,12 +209,12 @@ public sealed class PotentialOwnerTests : IDisposable
}
// The well is authored once, by curves of mass (target: no per-body authoring of a core or Roche limit): a body whose
// record carries other radius, gravity-radius or gravity-depth multipliers has the same strength, core and Roche limit,
// and pulls and digs exactly as its plain twin. The multipliers are brush inputs for the renderer, nothing else.
// record carries another radius multiplier has the same strength, core and Roche limit, and pulls and digs exactly as
// its plain twin.
[Theory]
[InlineData(2.5f, 3f, .4f)]
[InlineData(.5f, .5f, 3f)]
public void PerBodyMultipliersDoNotMoveTheWell(float bodyRadius, float gravityRadius, float gravityDepth)
[InlineData(2.5f)]
[InlineData(.5f)]
public void PerBodyMultipliersDoNotMoveTheWell(float bodyRadius)
{
var planets = Curves();
foreach (var mass in new[] { 29.2f, 14152.4f })
@ -226,8 +223,6 @@ public sealed class PotentialOwnerTests : IDisposable
var scaled = ZoneOf(planets, data =>
{
data.BodyRadiusMultiplier = bodyRadius;
data.GravityRadiusMultiplier = gravityRadius;
data.GravityDepthMultiplier = gravityDepth;
}, (mass, float2.zero));
var a = plain.PlanetInstances.Values.Single();
var b = scaled.PlanetInstances.Values.Single();

2
tests/Aetheria.Shared.Tests/WellFixture.cs
View file

@ -10,8 +10,6 @@ internal static class WellFixture
public static void Dig(CultCache cache, ZonePack pack, PlanetSettings settings, float strength, float coreRadius, float2 at = default)
{
settings.BodyRadius = new ExponentialCurve();
settings.GravityRadius = new ExponentialCurve(); // brush inputs, read by Planet until grid-lowering deletes them
settings.GravityDepth = new ExponentialCurve();
settings.OrbitPeriod = new ExponentialCurve();
settings.WellStrength = new ExponentialCurve { Constant = strength };
settings.CoreRadius = new ExponentialCurve { Constant = coreRadius };

2
tests/Aetheria.Shared.Tests/ZonePlacedAtBuildTests.cs
View file

@ -44,8 +44,6 @@ public sealed class ZonePlacedAtBuildTests : IDisposable
{
OrbitPeriod = Flat(Period),
BodyRadius = Flat(20f),
GravityRadius = Flat(0f), // brush inputs, read by Planet until grid-lowering deletes them
GravityDepth = Flat(0f),
WellStrength = Flat(100f),
CoreRadius = Flat(20f),
RocheLimit = Flat(30f),