From fcaafe52b40a30ebd8f04f51b354789f0e2592c4 Mon Sep 17 00:00:00 2001
From: Andrew Copland <andrewjohncopland@yahoo.co.uk>
Date: Wed, 20 Nov 2024 16:34:51 +0000
Subject: [PATCH] Functioning Terrain tab in perfinfo with debug toggles

---
 src/GeoSphere.cpp      | 35 ++++++++++++++++++++++++++++++-----
 src/GeoSphere.h        | 10 ++++++++++
 src/pigui/PerfInfo.cpp | 26 +++++++++++++++++++++++---
 3 files changed, 63 insertions(+), 8 deletions(-)

diff --git a/src/GeoSphere.cpp b/src/GeoSphere.cpp
index fa3a46ec20..cccba4a357 100644
--- a/src/GeoSphere.cpp
+++ b/src/GeoSphere.cpp
@@ -39,6 +39,7 @@ static const int detail_edgeLen[5] = {
 
 static const double gs_targetPatchTriLength(100.0);
 static std::vector<GeoSphere *> s_allGeospheres;
+static Uint32 s_debugFlags = GeoSphere::DebugFlags::DEBUG_NONE;
 
 void GeoSphere::InitGeoSphere()
 {
@@ -127,6 +128,18 @@ bool GeoSphere::OnAddSingleSplitResult(const SystemPath &path, SSingleSplitResul
 	return false;
 }
 
+//static
+void GeoSphere::SetDebugFlags(Uint32 flags)
+{
+	s_debugFlags = flags;
+}
+
+//static
+Uint32 GeoSphere::GetDebugFlags()
+{
+	return s_debugFlags;
+}
+
 void GeoSphere::Reset()
 {
 	{
@@ -195,6 +208,12 @@ GeoSphere::GeoSphere(const SystemBody *body) :
 
 	m_visiblePatches.reserve(1024);
 
+	if (Pi::config->Int("SortGeoPatches") == 0) {
+		SetDebugFlags(GetDebugFlags() & ~DebugFlags::DEBUG_SORTGEOPATCHES);
+	} else {
+		SetDebugFlags(GetDebugFlags() | DebugFlags::DEBUG_SORTGEOPATCHES);
+	}
+
 	//SetUpMaterials is not called until first Render since light count is zero :)
 }
 
@@ -443,11 +462,10 @@ void GeoSphere::Render(Graphics::Renderer *renderer, const matrix4x4d &modelView
 
 	renderer->SetTransform(matrix4x4f(modelView));
 
-	if (Pi::config->Int("SortGeoPatches") == 0) {
-		for (int i = 0; i < NUM_PATCHES; i++) {
-			m_patches[i]->Render(renderer, campos, modelView, frustum);
-		}
-	} else {
+	if (s_debugFlags & GeoSphere::DebugFlags::DEBUG_WIREFRAME) 
+		renderer->SetWireFrameMode(true);
+
+	if (s_debugFlags & GeoSphere::DebugFlags::DEBUG_SORTGEOPATCHES) {
 		// Gather the patches that could be rendered
 		for (int i = 0; i < NUM_PATCHES; i++) {
 			m_patches[i]->GatherRenderablePatches(m_visiblePatches, renderer, campos, frustum);
@@ -468,8 +486,15 @@ void GeoSphere::Render(Graphics::Renderer *renderer, const matrix4x4d &modelView
 
 		// must clear this after each render otherwise it just accumulates every patch ever drawn!
 		m_visiblePatches.clear();
+	} else {
+		for (int i = 0; i < NUM_PATCHES; i++) {
+			m_patches[i]->Render(renderer, campos, modelView, frustum);
+		}
 	}
 
+	if (s_debugFlags & GeoSphere::DebugFlags::DEBUG_WIREFRAME)
+		renderer->SetWireFrameMode(false);
+
 	renderer->SetAmbientColor(oldAmbient);
 
 	renderer->GetStats().AddToStatCount(Graphics::Stats::STAT_PLANETS, 1);
diff --git a/src/GeoSphere.h b/src/GeoSphere.h
index 0f3ad03a8c..b74b459a70 100644
--- a/src/GeoSphere.h
+++ b/src/GeoSphere.h
@@ -57,6 +57,16 @@ class GeoSphere : public BaseSphere {
 	static void OnChangeGeoSphereDetailLevel();
 	static bool OnAddQuadSplitResult(const SystemPath &path, SQuadSplitResult *res);
 	static bool OnAddSingleSplitResult(const SystemPath &path, SSingleSplitResult *res);
+
+	enum DebugFlags : uint32_t { // <enum scope='GeoSphere' name=GeoSphereDebugFlags prefix=DEBUG_ public>
+		DEBUG_NONE = 0x0,
+		DEBUG_SORTGEOPATCHES = 0x1,
+		DEBUG_WIREFRAME = 0x2,
+		DEBUG_FACELABELS = 0x4
+	};
+	static void SetDebugFlags(Uint32 flags);
+	static Uint32 GetDebugFlags();
+
 	// in sbody radii
 	virtual double GetMaxFeatureHeight() const override final { return m_terrain->GetMaxHeight(); }
 
diff --git a/src/pigui/PerfInfo.cpp b/src/pigui/PerfInfo.cpp
index 6cf427d317..fe9799fbdb 100644
--- a/src/pigui/PerfInfo.cpp
+++ b/src/pigui/PerfInfo.cpp
@@ -5,6 +5,7 @@
 #include "Frame.h"
 #include "Game.h"
 #include "GameConfig.h"
+#include "GeoSphere.h"
 #include "Input.h"
 #include "LuaPiGui.h"
 #include "Pi.h"
@@ -629,10 +630,29 @@ void PerfInfo::DrawInputDebug()
 
 void PiGui::PerfInfo::DrawTerrainDebug()
 {
-	bool sortGeoPatches = Pi::config->Int("SortGeoPatches") == 1;
-	if (ImGui::Checkbox("Distance Sort GeoPatches", &sortGeoPatches)) {
-		Pi::config->SetInt("SortGeoPatches", sortGeoPatches ? 1 : 0);
+	ImGui::SeparatorText("Terrain Debug");
+
+	using Flags = GeoSphere::DebugFlags;
+	uint32_t debugFlags = GeoSphere::GetDebugFlags();
+	bool showSort = debugFlags & Flags::DEBUG_SORTGEOPATCHES;
+	bool showWire = debugFlags & Flags::DEBUG_WIREFRAME;
+	//bool showFace = debugFlags & Flags::DEBUG_FACELABELS;
+
+	bool changed = ImGui::Checkbox("Distance Sort GeoPatches", &showSort);
+	changed |= ImGui::Checkbox("Show Wireframe", &showWire);
+	//changed |= ImGui::Checkbox("Show Face IDs", &showFace);
+
+	/* clang-format off */
+	if (changed) {
+		debugFlags = (showSort ? Flags::DEBUG_SORTGEOPATCHES : 0)
+			| (showWire ? Flags::DEBUG_WIREFRAME : 0);
+			//| (showFace ? Flags::DEBUG_FACELABELS : 0);
+		GeoSphere::SetDebugFlags(debugFlags);
+		Pi::config->SetInt("SortGeoPatches", showSort ? 1 : 0);
+
+		Pi::config->Save();
 	}
+	/* clang-format on */
 }
 
 void PerfInfo::DrawImGuiStats()