split stencil/depth tests from unlit material tests

2025-06-09 18:15:17 +08:00
parent 073976b40e
commit 78e14574ef
3 changed files with 284 additions and 108 deletions
--- a/thermion_dart/test/material_depth_buffer_tests.dart
+++ b/thermion_dart/test/material_depth_buffer_tests.dart
@@ -0,0 +1,85 @@
+import 'dart:io';
+import 'dart:math';
+import 'package:thermion_dart/thermion_dart.dart';
+import 'package:test/test.dart';
+import 'helpers.dart';
+
+Future<
+    ({
+      ThermionAsset blueCube,
+      MaterialInstance blueMaterialInstance,
+      ThermionAsset greenCube,
+      MaterialInstance greenMaterialInstance
+    })> setup(ThermionViewer viewer) async {
+  var blueMaterialInstance =
+      await FilamentApp.instance!.createUnlitMaterialInstance();
+  final blueCube = await viewer.createGeometry(GeometryHelper.cube(),
+      materialInstances: [blueMaterialInstance]);
+  await blueMaterialInstance.setParameterFloat4(
+      "baseColorFactor", 0.0, 0.0, 1.0, 1.0);
+
+  // Position blue cube slightly behind/below/right
+  await blueCube.setTransform(Matrix4.translation(Vector3(1.0, -1.0, -1.0)));
+
+  var greenMaterialInstance =
+      await FilamentApp.instance!.createUnlitMaterialInstance();
+  final greenCube = await viewer.createGeometry(GeometryHelper.cube(),
+      materialInstances: [greenMaterialInstance]);
+  await greenMaterialInstance.setParameterFloat4(
+      "baseColorFactor", 0.0, 1.0, 0.0, 1.0);
+
+  return (
+    blueCube: blueCube,
+    blueMaterialInstance: blueMaterialInstance,
+    greenCube: greenCube,
+    greenMaterialInstance: greenMaterialInstance
+  );
+}
+
+void main() async {
+  final testHelper = TestHelper("material");
+
+  await testHelper.setup();
+
+  test('disable depth write', () async {
+    await testHelper.withViewer((viewer) async {
+      final (
+        :blueCube,
+        :blueMaterialInstance,
+        :greenCube,
+        :greenMaterialInstance
+      ) = await setup(viewer);
+
+      // With depth write enabled on both materials, green cube renders behind the blue cube
+      await testHelper.capture(
+          viewer.view, "material_instance_depth_write_enabled");
+
+      // Disable depth write on green cube
+      // Blue cube will always appear in front
+      await greenMaterialInstance.setDepthWriteEnabled(false);
+      await testHelper.capture(
+          viewer.view, "material_instance_depth_write_disabled");
+
+      // Set priority for greenCube to render last, making it appear in front
+      await viewer.setPriority(greenCube.entity, 7);
+      await testHelper.capture(
+          viewer.view, "material_instance_depth_write_disabled_with_priority");
+    });
+  });
+  
+  test('set depth func to NEVER', () async {
+    await testHelper.withViewer((viewer) async {
+      final (
+        :blueCube,
+        :blueMaterialInstance,
+        :greenCube,
+        :greenMaterialInstance
+      ) = await setup(viewer);
+
+      // Set depth func to NEVER on green cube
+      await greenMaterialInstance.setDepthFunc(SamplerCompareFunction.N);
+      // Green cube is not rendered at all
+      await testHelper.capture(viewer.view, "depth_func_never");
+    });
+  });
+}