From 08e3d16a58434b1871330d862f21d5897c6af744 Mon Sep 17 00:00:00 2001
From: x2048 <codeforsmile@gmail.com>
Date: Sun, 14 Aug 2022 20:29:20 +0200
Subject: [PATCH] Limit force shadow update to urgent blocks (#12692)

---
 src/client/client.cpp                | 3 ++-
 src/client/mesh_generator_thread.cpp | 3 +++
 src/client/mesh_generator_thread.h   | 2 ++
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/client/client.cpp b/src/client/client.cpp
index 31bbf2463..b7d1cbfe0 100644
--- a/src/client/client.cpp
+++ b/src/client/client.cpp
@@ -574,7 +574,8 @@ void Client::step(float dtime)
 					else {
 						// Replace with the new mesh
 						block->mesh = r.mesh;
-						force_update_shadows = true;
+						if (r.urgent)
+							force_update_shadows = true;
 					}
 				}
 			} else {
diff --git a/src/client/mesh_generator_thread.cpp b/src/client/mesh_generator_thread.cpp
index c1bd7388e..ec567c8c1 100644
--- a/src/client/mesh_generator_thread.cpp
+++ b/src/client/mesh_generator_thread.cpp
@@ -113,6 +113,7 @@ bool MeshUpdateQueue::addBlock(Map *map, v3s16 p, bool ack_block_to_server, bool
 				q->ack_block_to_server = true;
 			q->crack_level = m_client->getCrackLevel();
 			q->crack_pos = m_client->getCrackPos();
+			q->urgent |= urgent;
 			return true;
 		}
 	}
@@ -125,6 +126,7 @@ bool MeshUpdateQueue::addBlock(Map *map, v3s16 p, bool ack_block_to_server, bool
 	q->ack_block_to_server = ack_block_to_server;
 	q->crack_level = m_client->getCrackLevel();
 	q->crack_pos = m_client->getCrackPos();
+	q->urgent = urgent;
 	m_queue.push_back(q);
 
 	// This queue entry is a new reference to the cached blocks
@@ -310,6 +312,7 @@ void MeshUpdateThread::doUpdate()
 		r.p = q->p;
 		r.mesh = mesh_new;
 		r.ack_block_to_server = q->ack_block_to_server;
+		r.urgent = q->urgent;
 
 		m_queue_out.push_back(r);
 
diff --git a/src/client/mesh_generator_thread.h b/src/client/mesh_generator_thread.h
index 552b2a9f0..09400196d 100644
--- a/src/client/mesh_generator_thread.h
+++ b/src/client/mesh_generator_thread.h
@@ -45,6 +45,7 @@ struct QueuedMeshUpdate
 	int crack_level = -1;
 	v3s16 crack_pos;
 	MeshMakeData *data = nullptr; // This is generated in MeshUpdateQueue::pop()
+	bool urgent = false;
 
 	QueuedMeshUpdate() = default;
 	~QueuedMeshUpdate();
@@ -105,6 +106,7 @@ struct MeshUpdateResult
 	v3s16 p = v3s16(-1338, -1338, -1338);
 	MapBlockMesh *mesh = nullptr;
 	bool ack_block_to_server = false;
+	bool urgent = false;
 
 	MeshUpdateResult() = default;
 };