terrain: added tessellation option

Editor/TerrainWindow.cpp

@@ -361,6 +361,16 @@ void TerrainWindow::Create(EditorComponent* _editor)
 		});
 	AddWidget(&physicsCheckBox);
 
+	tessellationCheckBox.Create("Tessellation: ");
+	tessellationCheckBox.SetTooltip("Specify whether tessellation is enabled for terrain surface.\nTessellation requires GPU hardware support\nTessellation doesn't work with raytracing effects or Visibility Compute Shading rendering mode.");
+	tessellationCheckBox.SetSize(XMFLOAT2(hei, hei));
+	tessellationCheckBox.SetPos(XMFLOAT2(x, y += step));
+	tessellationCheckBox.SetCheck(true);
+	tessellationCheckBox.OnClick([=](wi::gui::EventArgs args) {
+		terrain->SetTessellationEnabled(args.bValue);
+		});
+	AddWidget(&tessellationCheckBox);
+
 	lodSlider.Create(0.0001f, 0.01f, 0.005f, 10000, "Mesh LOD Distance: ");
 	lodSlider.SetTooltip("Set the LOD (Level Of Detail) distance multiplier.\nLow values increase LOD detail in distance");
 	lodSlider.SetSize(XMFLOAT2(wid, hei));
@@ -777,6 +787,7 @@ void TerrainWindow::SetEntity(Entity entity)
 	removalCheckBox.SetCheck(terrain->IsRemovalEnabled());
 	grassCheckBox.SetCheck(terrain->IsGrassEnabled());
 	physicsCheckBox.SetCheck(terrain->IsPhysicsEnabled());
+	tessellationCheckBox.SetCheck(terrain->IsTessellationEnabled());
 	lodSlider.SetValue(terrain->lod_multiplier);
 	generationSlider.SetValue((float)terrain->generation);
 	propGenerationSlider.SetValue((float)terrain->prop_generation);
@@ -1049,6 +1060,7 @@ void TerrainWindow::ResizeLayout()
 	centerToCamCheckBox.SetPos(XMFLOAT2(removalCheckBox.GetPos().x - 100, removalCheckBox.GetPos().y));
 	add_checkbox(grassCheckBox);
 	physicsCheckBox.SetPos(XMFLOAT2(grassCheckBox.GetPos().x - 100, grassCheckBox.GetPos().y));
+	add_checkbox(tessellationCheckBox);
 	add(lodSlider);
 	add(generationSlider);
 	add(propGenerationSlider);

Editor/TerrainWindow.h

@@ -56,6 +56,7 @@ public:
 	wi::gui::CheckBox removalCheckBox;
 	wi::gui::CheckBox grassCheckBox;
 	wi::gui::CheckBox physicsCheckBox;
+	wi::gui::CheckBox tessellationCheckBox;
 	wi::gui::Slider lodSlider;
 	wi::gui::Slider generationSlider;
 	wi::gui::Slider propGenerationSlider;

WickedEngine/wiTerrain.cpp

@@ -935,6 +935,15 @@ namespace wi::terrain
 			{
 				chunk_data.mesh_vertex_positions = chunk_mesh->vertex_positions.data();
 
+				if (IsTessellationEnabled())
+				{
+					chunk_mesh->tessellationFactor = 32;
+				}
+				else
+				{
+					chunk_mesh->tessellationFactor = 0;
+				}
+
 #if 0
 				// Test: remove off screen chunks
 				//	But the problem is that shadow casters shouldn't be removed outside view

WickedEngine/wiTerrain.h

@@ -173,6 +173,7 @@ namespace wi::terrain
 			GRASS = 1 << 2,
 			GENERATION_STARTED = 1 << 4,
 			PHYSICS = 1 << 5,
+			TESSELLATION = 1 << 6,
 		};
 		uint32_t _flags = CENTER_TO_CAM | REMOVAL | GRASS;
 
@@ -207,12 +208,14 @@ namespace wi::terrain
 		constexpr bool IsGrassEnabled() const { return _flags & GRASS; }
 		constexpr bool IsGenerationStarted() const { return _flags & GENERATION_STARTED; }
 		constexpr bool IsPhysicsEnabled() const { return _flags & PHYSICS; }
+		constexpr bool IsTessellationEnabled() const { return _flags & TESSELLATION; }
 
 		constexpr void SetCenterToCamEnabled(bool value) { if (value) { _flags |= CENTER_TO_CAM; } else { _flags &= ~CENTER_TO_CAM; } }
 		constexpr void SetRemovalEnabled(bool value) { if (value) { _flags |= REMOVAL; } else { _flags &= ~REMOVAL; } }
 		constexpr void SetGrassEnabled(bool value) { if (value) { _flags |= GRASS; } else { _flags &= ~GRASS; } }
 		constexpr void SetGenerationStarted(bool value) { if (value) { _flags |= GENERATION_STARTED; } else { _flags &= ~GENERATION_STARTED; } }
 		constexpr void SetPhysicsEnabled(bool value) { if (value) { _flags |= PHYSICS; } else { _flags &= ~PHYSICS; } }
+		constexpr void SetTessellationEnabled(bool value) { if (value) { _flags |= TESSELLATION; } else { _flags &= ~TESSELLATION; } }
 
 		float lod_multiplier = 0.005f;
 		int generation = 12;

WickedEngine/wiVersion.cpp

@@ -9,7 +9,7 @@ namespace wi::version
 	// minor features, major updates, breaking compatibility changes
 	const int minor = 71;
 	// minor bug fixes, alterations, refactors, updates
-	const int revision = 78;
+	const int revision = 79;
 
 	const std::string version_string = std::to_string(major) + "." + std::to_string(minor) + "." + std::to_string(revision);