From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 8 Apr 2011 22:56:45 +0000 (+0000)
Subject: Add an element offset to PrimitiveBuilder
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=df6f8f1f26b1f230dcb1d626d278c43fd48d468d

Add an element offset to PrimitiveBuilder
---

diff --git a/source/geometrybuilder.cpp b/source/geometrybuilder.cpp
index 6ed52ed2..327e8fcf 100644
--- a/source/geometrybuilder.cpp
+++ b/source/geometrybuilder.cpp
@@ -49,6 +49,7 @@ void GeometryBuilder::adjust_texture_scale(float &u_scale, float &v_scale, float
 void GeometryBuilder::build(Mesh &mesh) const
 {
 	MeshBuilder builder(mesh);
+	builder.auto_offset();
 	build(builder);
 }
 
diff --git a/source/meshbuilder.cpp b/source/meshbuilder.cpp
index b238ae63..6f90f67d 100644
--- a/source/meshbuilder.cpp
+++ b/source/meshbuilder.cpp
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Copyright © 2008, 2010-2011  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -17,6 +17,11 @@ MeshBuilder::MeshBuilder(Mesh &m):
 	batch(0)
 { }
 
+void MeshBuilder::auto_offset()
+{
+	offset(mesh.get_vertices().size());
+}
+
 void MeshBuilder::begin_()
 {
 	batch = new Batch(type);
diff --git a/source/meshbuilder.h b/source/meshbuilder.h
index c8354b9e..6118c686 100644
--- a/source/meshbuilder.h
+++ b/source/meshbuilder.h
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Copyright © 2008, 2011  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -24,6 +24,7 @@ private:
 
 public:
 	MeshBuilder(Mesh &);
+	void auto_offset();
 private:
 	virtual void begin_();
 	virtual void end_();
diff --git a/source/primitivebuilder.cpp b/source/primitivebuilder.cpp
index 42e9d39c..61bde9b9 100644
--- a/source/primitivebuilder.cpp
+++ b/source/primitivebuilder.cpp
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2008, 2010  Mikko Rasa, Mikkosoft Productions
+Copyright © 2008, 2010-2011  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -13,7 +13,8 @@ namespace GL {
 PrimitiveBuilder::PrimitiveBuilder(VertexArray &a):
 	array(a),
 	vab(array),
-	in_batch(false)
+	in_batch(false),
+	offs(0)
 { }
 
 void PrimitiveBuilder::begin(PrimitiveType t)
@@ -37,13 +38,20 @@ void PrimitiveBuilder::end()
 	end_();
 }
 
+void PrimitiveBuilder::offset(unsigned o)
+{
+	if(o>array.size())
+		throw InvalidParameterValue("Element offset out of range");
+	offs = o;
+}
+
 void PrimitiveBuilder::element(unsigned i)
 {
 	if(!in_batch)
 		throw InvalidState("Element specification not between begin() and end()");
-	if(i>=array.size())
+	if(offs+i>=array.size())
 		throw InvalidParameterValue("Element index out of range");
-	element_(i);
+	element_(offs+i);
 }
 
 PrimitiveType PrimitiveBuilder::get_type() const
diff --git a/source/primitivebuilder.h b/source/primitivebuilder.h
index a4e34a67..b8b90f44 100644
--- a/source/primitivebuilder.h
+++ b/source/primitivebuilder.h
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Copyright © 2008, 2010-2011  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -30,11 +30,13 @@ protected:
 	VertexArrayBuilder vab;
 	PrimitiveType type;
 	bool in_batch;
+	unsigned offs;
 
 	PrimitiveBuilder(VertexArray &);
 public:
 	void begin(PrimitiveType);
 	void end();
+	void offset(unsigned);
 	void element(unsigned);
 	PrimitiveType get_type() const;
 protected: