From cbf5b14f615d21cd3984e85201612219bf734ac6 Mon Sep 17 00:00:00 2001
From: Ralf Habacker <ralf.habacker@freenet.de>
Date: Tue, 16 Jan 2018 10:23:36 +0100
Subject: [PATCH] obj plugin: Fix bug not adding first vertex index on writing
 GL_LINExxx array types

---
 src/osgPlugins/obj/OBJWriterNodeVisitor.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/osgPlugins/obj/OBJWriterNodeVisitor.cpp b/src/osgPlugins/obj/OBJWriterNodeVisitor.cpp
index 6a5277c27..81ce5fee6 100644
--- a/src/osgPlugins/obj/OBJWriterNodeVisitor.cpp
+++ b/src/osgPlugins/obj/OBJWriterNodeVisitor.cpp
@@ -384,7 +384,7 @@ void ObjPrimitiveIndexWriter::drawArrays(GLenum mode,GLint first,GLsizei count)
 
             for(GLsizei i=0;i<count;++i)
             {
-                writePoint(i);
+                writePoint(first + i);
             }
             break;
         }
@@ -393,7 +393,7 @@ void ObjPrimitiveIndexWriter::drawArrays(GLenum mode,GLint first,GLsizei count)
         {
             for(GLsizei i=0;i<count;i+=2)
             {
-                writeLine(i, i+1);
+                writeLine(first + i, first + i+1);
             }
             break;
         }
@@ -401,7 +401,7 @@ void ObjPrimitiveIndexWriter::drawArrays(GLenum mode,GLint first,GLsizei count)
         {
             for(GLsizei i=1;i<count;++i)
             {
-                writeLine(i-1, i);
+                writeLine(first + i-1, first + i);
             }
             break;
         }
@@ -409,9 +409,9 @@ void ObjPrimitiveIndexWriter::drawArrays(GLenum mode,GLint first,GLsizei count)
         {
             for(GLsizei i=1;i<count;++i)
             {
-                writeLine(i-1, i);
+                writeLine(first + i-1, first + i);
             }
-            writeLine(count-1, 0);
+            writeLine(first + count-1, first + 0);
             break;
         }
         default: