From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 1 Mar 2022 10:52:02 +0000 (+0200)
Subject: Fix incorrect vertex array indexing in InstanceArray
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=cc270481e3e2f74d060ce2c63551970c835b06b8

Fix incorrect vertex array indexing in InstanceArray
---

diff --git a/source/render/instancearray.cpp b/source/render/instancearray.cpp
index a838b948..a03fbf20 100644
--- a/source/render/instancearray.cpp
+++ b/source/render/instancearray.cpp
@@ -85,7 +85,7 @@ void InstanceArray::update_instance_matrix(unsigned index)
 {
 	const Matrix &m = *instances[index]->get_matrix();
 
-	float *d = reinterpret_cast<float *>(instance_data.modify(instances.size()-1)+matrix_offset);
+	float *d = reinterpret_cast<float *>(instance_data.modify(index)+matrix_offset);
 	for(unsigned i=0; i<12; ++i)
 		d[i] = m(i/4, i%4);
 }