X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fmesh.cpp;h=a1930d75d124bc35f9d6c40374b9cb7b2f64cb6a;hp=d421769abc257a775d53a4b0c73909cd92c36abb;hb=083578c2ca0aabfa60e8872e23d53e9101795dff;hpb=85c82f93f4874bcf0b04332c9abb62cd2a5b181b

diff --git a/source/mesh.cpp b/source/mesh.cpp
index d421769a..a1930d75 100644
--- a/source/mesh.cpp
+++ b/source/mesh.cpp
@@ -1,11 +1,12 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Copyright © 2007-2010  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
 #include "buffer.h"
+#include "extension.h"
 #include "mesh.h"
 
 using namespace std;
@@ -15,86 +16,95 @@ namespace GL {
 
 Mesh::Mesh():
 	vertices(VERTEX3),
-	ibuf(0)
+	ibuf(0),
+	defer_ibuf(true)
 { }
 
 Mesh::Mesh(const VertexFormat &f):
 	vertices(f),
-	ibuf(0)
+	ibuf(0),
+	defer_ibuf(true)
 { }
 
-void Mesh::use_vertex_buffer(bool b)
+Mesh::~Mesh()
+{
+	delete ibuf;
+}
+
+void Mesh::clear()
+{
+	vertices.clear();
+	batches.clear();
+}
+
+void Mesh::use_buffers(bool b)
 {
 	if(b)
 	{
 		vertices.use_vertex_buffer();
 		if(!ibuf)
 			ibuf = new Buffer(ELEMENT_ARRAY_BUFFER);
-		update_index_buffer();
+		defer_ibuf = false;
 	}
 	else
 	{
 		vertices.use_vertex_buffer(0);
 		delete ibuf;
 		ibuf = 0;
+		defer_ibuf = false;
 	}
 }
 
-float *Mesh::get_vertex(unsigned i)
+unsigned Mesh::get_n_vertices() const
 {
-	return vertices[i];
+	return vertices.size();
 }
 
-void Mesh::add_batch(const Batch &b)
+float *Mesh::modify_vertex(unsigned i)
 {
-	batches.push_back(b);
-	update_index_buffer();
+	return vertices.modify(i);
 }
 
-void Mesh::clear()
+void Mesh::add_batch(const Batch &b)
 {
-	vertices.clear();
-	batches.clear();
-}
+	bool can_append = false;
+	if(!batches.empty())
+	{
+		PrimitiveType type = b.get_type();
+		can_append = (type==batches.back().get_type() &&
+			type!=LINE_STRIP && type!=LINE_LOOP && type!=POLYGON &&
+			(type!=TRIANGLE_FAN || is_supported("GL_NV_primitive_restart")));
+	}
 
-void Mesh::draw() const
-{
-	vertices.apply();
-	if(ibuf)
+	if(defer_ibuf)
 	{
-		ibuf->bind();
-		unsigned offset = 0;
-		for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
-		{
-			i->draw_with_buffer(offset);
-			offset += i->size();
-		}
-		ibuf->unbind();
+		ibuf = new Buffer(ELEMENT_ARRAY_BUFFER);
+		defer_ibuf = false;
 	}
+
+	if(can_append)
+		batches.back().append(b);
 	else
 	{
-		for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
-			i->draw();
+		Batch *prev = (batches.empty() ? 0 : &batches.back());
+		batches.push_back(b);
+		if(ibuf)
+			batches.back().use_index_buffer(ibuf, prev);
 	}
 }
 
-void Mesh::update_index_buffer()
+void Mesh::draw() const
 {
-	if(!ibuf)
-		return;
+	vertices.apply();
 
-	unsigned total = 0;
-	for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
-		total += i->size();
+	if(ibuf)
+		ibuf->bind_to(ELEMENT_ARRAY_BUFFER);
 
-	ibuf->data(total*sizeof(unsigned), 0);
-	unsigned offset = 0;
 	for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
-	{
-		ibuf->sub_data(offset*sizeof(unsigned), i->size()*sizeof(unsigned), &i->get_indices()[0]);
-		offset += i->size();
-	}
-	ibuf->unbind();
+		i->draw();
+
+	if(ibuf)
+		Buffer::unbind_from(ELEMENT_ARRAY_BUFFER);
 }
 
 
@@ -113,8 +123,9 @@ void Mesh::Loader::vertices(VertexFormat f)
 
 void Mesh::Loader::batch(PrimitiveType p)
 {
-	obj.batches.push_back(Batch(p));
-	load_sub(obj.batches.back());
+	Batch btc(p);
+	load_sub(btc);
+	obj.add_batch(btc);
 }
 
 } // namespace GL