From f8fd432dca9f84a489cb7033afc4e4eef7cff49d Mon Sep 17 00:00:00 2001
From: lhofhansl <lhofhansl@yahoo.com>
Date: Thu, 3 Nov 2016 19:14:32 -0700
Subject: [PATCH] Add debug priv, and allow player to display the scene as
 wire-frame. (#4709)

---
 builtin/game/privileges.lua |  5 ++++-
 src/clientmap.cpp           |  1 +
 src/clientmap.h             |  3 +++
 src/game.cpp                | 30 +++++++++++++++++++++---------
 4 files changed, 29 insertions(+), 10 deletions(-)

diff --git a/builtin/game/privileges.lua b/builtin/game/privileges.lua
index 05c79440c..f89514134 100644
--- a/builtin/game/privileges.lua
+++ b/builtin/game/privileges.lua
@@ -58,4 +58,7 @@ core.register_privilege("zoom", {
 	description = "Can zoom the camera",
 	give_to_singleplayer = false,
 })
-
+core.register_privilege("debug", {
+	description = "Allows enabling various debug options that may affect gameplay",
+	give_to_singleplayer = false,
+})
diff --git a/src/clientmap.cpp b/src/clientmap.cpp
index a0a780250..60170ab70 100644
--- a/src/clientmap.cpp
+++ b/src/clientmap.cpp
@@ -521,6 +521,7 @@ void ClientMap::renderMap(video::IVideoDriver* driver, s32 pass)
 				buf->getMaterial().setFlag(video::EMF_TRILINEAR_FILTER, m_cache_trilinear_filter);
 				buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, m_cache_bilinear_filter);
 				buf->getMaterial().setFlag(video::EMF_ANISOTROPIC_FILTER, m_cache_anistropic_filter);
+				buf->getMaterial().setFlag(video::EMF_WIREFRAME, m_control.show_wireframe);
 
 				const video::SMaterial& material = buf->getMaterial();
 				video::IMaterialRenderer* rnd =
diff --git a/src/clientmap.h b/src/clientmap.h
index 396e68f64..8855eecf6 100644
--- a/src/clientmap.h
+++ b/src/clientmap.h
@@ -32,6 +32,7 @@ struct MapDrawControl
 		range_all(false),
 		wanted_range(0),
 		wanted_max_blocks(0),
+		show_wireframe(false),
 		blocks_drawn(0),
 		blocks_would_have_drawn(0),
 		farthest_drawn(0)
@@ -43,6 +44,8 @@ struct MapDrawControl
 	float wanted_range;
 	// Maximum number of blocks to draw
 	u32 wanted_max_blocks;
+	// show a wire frame for debugging
+	bool show_wireframe;
 	// Number of blocks rendered is written here by the renderer
 	u32 blocks_drawn;
 	// Number of blocks that would have been drawn in wanted_range
diff --git a/src/game.cpp b/src/game.cpp
index 9a03071dd..af0476a0b 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -1573,7 +1573,7 @@ protected:
 			bool shift_pressed);
 	void toggleFog(float *statustext_time, bool *flag);
 	void toggleDebug(float *statustext_time, bool *show_debug,
-			bool *show_profiler_graph);
+			bool *show_profiler_graph, bool *show_wireframe);
 	void toggleUpdateCamera(float *statustext_time, bool *flag);
 	void toggleProfiler(float *statustext_time, u32 *profiler_current_page,
 			u32 profiler_max_page);
@@ -2812,7 +2812,8 @@ void Game::processKeyInput(VolatileRunFlags *flags,
 	} else if (wasKeyDown(KeyType::TOGGLE_UPDATE_CAMERA)) {
 		toggleUpdateCamera(statustext_time, &flags->disable_camera_update);
 	} else if (wasKeyDown(KeyType::TOGGLE_DEBUG)) {
-		toggleDebug(statustext_time, &flags->show_debug, &flags->show_profiler_graph);
+		toggleDebug(statustext_time, &flags->show_debug, &flags->show_profiler_graph,
+			&draw_control->show_wireframe);
 	} else if (wasKeyDown(KeyType::TOGGLE_PROFILER)) {
 		toggleProfiler(statustext_time, profiler_current_page, profiler_max_page);
 	} else if (wasKeyDown(KeyType::INCREASE_VIEWING_RANGE)) {
@@ -3119,22 +3120,33 @@ void Game::toggleFog(float *statustext_time, bool *flag)
 
 
 void Game::toggleDebug(float *statustext_time, bool *show_debug,
-		bool *show_profiler_graph)
+		bool *show_profiler_graph, bool *show_wireframe)
 {
-	// Initial / 3x toggle: Chat only
+	// Initial / 4x toggle: Chat only
 	// 1x toggle: Debug text with chat
 	// 2x toggle: Debug text with profiler graph
+	// 3x toggle: Debug text and wireframe
 	if (!*show_debug) {
 		*show_debug = true;
 		*show_profiler_graph = false;
+		*show_wireframe = false;
 		statustext = L"Debug info shown";
-	} else if (*show_profiler_graph) {
-		*show_debug = false;
-		*show_profiler_graph = false;
-		statustext = L"Debug info and profiler graph hidden";
-	} else {
+	} else if (!*show_profiler_graph) {
 		*show_profiler_graph = true;
 		statustext = L"Profiler graph shown";
+	} else if (!*show_wireframe && client->checkPrivilege("debug")) {
+		*show_profiler_graph = false;
+		*show_wireframe = true;
+		statustext = L"Wireframe shown";
+	} else {
+		*show_debug = false;
+		*show_profiler_graph = false;
+		*show_wireframe = false;
+		if (client->checkPrivilege("debug")) {
+			statustext = L"Debug info, profiler graph, and wireframe hidden";
+		} else {
+			statustext = L"Debug info and profiler graph hidden";
+		}
 	}
 	*statustext_time = 0;
 }
-- 
2.25.1