From f9962b0db5072870864a1f758687106139f740dc Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Tue, 25 Feb 2025 00:23:11 +0000
Subject: Improve Terrain::generateMeshes performance

Creates mesh per surface based on a single buffer of all vertices and a collection of per surfuce indices.
Makes ColourBias a uniform instead of a vertex attribute.
---
 test/Jamfile.jam      |  1 +
 test/perf-terrain.cpp | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 test/perf-terrain.cpp

(limited to 'test')

diff --git a/test/Jamfile.jam b/test/Jamfile.jam
index c5c49d2..8219398 100644
--- a/test/Jamfile.jam
+++ b/test/Jamfile.jam
@@ -57,6 +57,7 @@ run test-glContextBhvr.cpp ;
 run test-assetFactory.cpp : -- : [ sequence.insertion-sort [ glob-tree $(res) : *.* ] fixtures/rgb.txt test-instancing ] : <library>test ;
 run perf-assetFactory.cpp : \< : test-assetFactory : <library>benchmark <library>test ;
 run perf-geoData.cpp : \< : test-geoData : <library>test <library>benchmark ;
+run perf-terrain.cpp : \< : test-geoData : <library>test <library>benchmark ;
 run perf-persistence.cpp : \< : test-persistence : <library>benchmark <library>test ;
 run test-worker.cpp ;
 run test-instancing.cpp : -- : test-glContainer : <library>test ;
diff --git a/test/perf-terrain.cpp b/test/perf-terrain.cpp
new file mode 100644
index 0000000..dbd44fa
--- /dev/null
+++ b/test/perf-terrain.cpp
@@ -0,0 +1,20 @@
+#include "game/terrain.h"
+#include "testMainWindow.h"
+#include <benchmark/benchmark.h>
+
+namespace {
+	void
+	terrainMeshgen(benchmark::State & state)
+	{
+		TestMainWindowAppBase window;
+		Terrain terrain {GeoData::loadFromAsciiGrid(FIXTURESDIR "height/SD19.asc")};
+
+		for (auto _ : state) {
+			terrain.generateMeshes();
+		}
+	}
+}
+
+BENCHMARK(terrainMeshgen);
+
+BENCHMARK_MAIN();
-- 
cgit v1.2.3