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Preserve Unity shader camera transform semantics

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This commit is contained in:
Meta Vens 2026-07-16 19:25:57 +01:00
commit 02203ff134
3 changed files with 35 additions and 2 deletions
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5
packages/org.gamecult.eve.unity-scene/Runtime/Fields/EveUnityFieldsVolumeRenderer.cs
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@ -140,7 +140,7 @@ namespace GameCult.Eve.UnityScene.Fields
var gpuProjection = GL.GetGPUProjectionMatrix(camera.projectionMatrix, true);
var viewProjection = gpuProjection * camera.worldToCameraMatrix;
SetMatrixPort("cameraInverseViewProjection", viewProjection.inverse);
SetMatrixPort("cameraToWorld", camera.cameraToWorldMatrix);
SetMatrixPort("cameraToWorld", CameraTransformToWorld(camera));
SetVectorPort("cameraProjectionExtents", ProjectionExtents(camera));
SetFloatPort("raymarchOffset", Halton(Time.frameCount & 1023, 3));
@ -594,6 +594,9 @@ namespace GameCult.Eve.UnityScene.Fields
return new Vector4(y * camera.aspect, y, 0f, 0f);
}
private static Matrix4x4 CameraTransformToWorld(Camera camera) =>
camera.transform.localToWorldMatrix;
private static float Halton(int index, int radix)
{
var result = 0f;

30
packages/org.gamecult.eve.unity-scene/Tests/Editor/EveFieldsUnitySceneProjectionTests.cs
View file

@ -2,6 +2,7 @@ using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;
using System.Reflection;
using GameCult.Eve.PluginFields;
using GameCult.Eve.UnityScene.Fields;
using NUnit.Framework;
@ -12,6 +13,35 @@ namespace GameCult.Eve.UnityScene.Tests
{
public sealed class EveFieldsUnitySceneProjectionTests
{
[Test]
public void VolumeCameraToWorldPreservesUnityShaderPositiveZForward()
{
var cameraObject = new GameObject("eve-volume-camera-matrix");
try
{
var camera = cameraObject.AddComponent<Camera>();
camera.transform.SetPositionAndRotation(
new Vector3(12f, -3f, 8f),
Quaternion.Euler(17f, 43f, -9f));
var method = typeof(EveUnityFieldsVolumeRenderer).GetMethod(
"CameraTransformToWorld",
BindingFlags.NonPublic | BindingFlags.Static);
Assert.That(method, Is.Not.Null);
var matrix = (Matrix4x4)method!.Invoke(null, new object[] { camera });
Assert.That(Vector3.Dot(
matrix.MultiplyVector(Vector3.forward).normalized,
camera.transform.forward), Is.EqualTo(1f).Within(0.00001f));
Assert.That(Vector3.Distance(
matrix.MultiplyPoint3x4(Vector3.zero),
camera.transform.position), Is.LessThan(0.00001f));
}
finally
{
UnityEngine.Object.DestroyImmediate(cameraObject);
}
}
[Test]
public void RasterizerConsumesPluginOwnedDocumentContract()
{

2
packages/org.gamecult.eve.unity-scene/package.json
View file

@ -1,7 +1,7 @@
{
"name": "org.gamecult.eve.unity-scene",
"displayName": "Eve Unity Scene Lowering",
"version": "0.3.57",
"version": "0.3.58",
"unity": "6000.0",
"description": "Provider-agnostic Unity scene shell for gamecult.eve.surface.v1 interactive world surfaces.",
"dependencies": {