X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fmesh.cpp;h=d474a27f116cc0c3e7175f7a64488120d4e83805;hb=c233a90fd05f1f5424d7fca94bb6b999f3061271;hp=fec753d0d3938d157b93403cd47716539f30551c;hpb=dc1d1159a61f378bda11e5989ad694a86b9a3c77;p=libs%2Fgl.git

diff --git a/source/mesh.cpp b/source/mesh.cpp
index fec753d0..d474a27f 100644
--- a/source/mesh.cpp
+++ b/source/mesh.cpp
@@ -1,11 +1,8 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include <msp/gl/extensions/arb_vertex_array_object.h>
+#include <msp/gl/extensions/arb_vertex_shader.h>
+#include "buffer.h"
 #include "mesh.h"
+#include "renderer.h"
 
 using namespace std;
 
@@ -13,57 +10,232 @@ namespace Msp {
 namespace GL {
 
 Mesh::Mesh():
-	vertices(NODATA)
+	vertices(VERTEX3),
+	vbuf(0),
+	ibuf(0),
+	vao_id(0),
+	defer_buffers(true),
+	dirty(0),
+	winding(0)
 { }
 
-Mesh::Mesh(VertexFormat f):
-	vertices(f)
+Mesh::Mesh(const VertexFormat &f):
+	vertices(f),
+	vbuf(0),
+	ibuf(0),
+	vao_id(0),
+	defer_buffers(true),
+	dirty(2),
+	winding(0)
 { }
 
-void Mesh::use_vertex_buffer(bool b)
+Mesh::~Mesh()
+{
+	delete vbuf;
+	delete ibuf;
+	if(vao_id)
+		glDeleteVertexArrays(1, &vao_id);
+}
+
+void Mesh::clear()
 {
+	vertices.clear();
+	batches.clear();
+}
+
+void Mesh::use_buffers(bool b)
+{
+	defer_buffers = false;
 	if(b)
-		vertices.use_vertex_buffer();
+		create_buffers();
 	else
-		vertices.use_vertex_buffer(0);
+	{
+		vertices.use_buffer(0);
+		delete vbuf;
+		vbuf = 0;
+		delete ibuf;
+		ibuf = 0;
+	}
+}
+
+void Mesh::create_buffers()
+{
+	defer_buffers = false;
+
+	if(!vbuf)
+		vbuf = new Buffer(ARRAY_BUFFER);
+	vertices.use_buffer(vbuf);
+
+	if(!ibuf)
+		ibuf = new Buffer(ELEMENT_ARRAY_BUFFER);
+
+	if(ARB_vertex_array_object && !vao_id)
+		glGenVertexArrays(1, &vao_id);
+}
+
+void Mesh::refresh() const
+{
+	vertices.refresh();
+	if(dirty)
+	{
+		if(dirty&1)
+		{
+			unbind();
+			for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
+				i->refresh();
+		}
+
+		if(dirty&2)
+		{
+			glBindVertexArray(vao_id);
+			BufferAlias<ARRAY_BUFFER> vbuf_alias(*vbuf);
+			Bind bind_vbuf(vbuf_alias);
+
+			const VertexFormat &fmt = vertices.get_format();
+			unsigned stride = get_stride(fmt)*sizeof(float);
+			float *ptr = 0;
+			for(const unsigned char *c=fmt.begin(); c!=fmt.end(); ++c)
+			{
+				unsigned t = get_component_type(*c);
+				if(t>=get_component_type(ATTRIB1))
+					t -= get_component_type(ATTRIB1);
+				unsigned sz = get_component_size(*c);
+				if(*c==COLOR4_UBYTE)
+					glVertexAttribPointer(t, 4, GL_UNSIGNED_BYTE, true, stride, ptr);
+				else
+					glVertexAttribPointer(t, sz, GL_FLOAT, false, stride, ptr);
+				glEnableVertexAttribArray(t);
+				ptr += sz;
+			}
+			glBindBuffer(ELEMENT_ARRAY_BUFFER, ibuf->get_id());
+			glBindVertexArray(0);
+		}
+
+		dirty = 0;
+	}
+}
+
+unsigned Mesh::get_n_vertices() const
+{
+	return vertices.size();
+}
+
+float *Mesh::modify_vertex(unsigned i)
+{
+	return vertices.modify(i);
 }
 
 void Mesh::add_batch(const Batch &b)
 {
-	batches.push_back(b);
+	if(defer_buffers)
+		create_buffers();
+
+	dirty |= 1;
+	if(!batches.empty() && batches.back().can_append(b.get_type()))
+		batches.back().append(b);
+	else
+	{
+		Batch *prev = (batches.empty() ? 0 : &batches.back());
+		batches.push_back(b);
+		if(ibuf)
+			batches.back().use_buffer(ibuf, prev);
+	}
 }
 
-void Mesh::clear()
+void Mesh::set_winding(const WindingTest *w)
 {
-	vertices.clear();
-	batches.clear();
+	winding = w;
 }
 
 void Mesh::draw() const
 {
-	vertices.apply();
+	refresh();
+
+	if(!current())
+	{
+		vertices.apply();
+		if(ibuf)
+			ibuf->bind_to(ELEMENT_ARRAY_BUFFER);
+	}
+
+	Bind bind_winding(winding);
+
 	for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
 		i->draw();
+
+	if(!current() && ibuf)
+		Buffer::unbind_from(ELEMENT_ARRAY_BUFFER);
+}
+
+void Mesh::draw(Renderer &renderer) const
+{
+	vertices.apply();
+	renderer.set_element_buffer(ibuf);
+	renderer.set_winding_test(winding);
+
+	for(list<Batch>::const_iterator i=batches.begin(); i!=batches.end(); ++i)
+		renderer.draw(*i);
+}
+
+void Mesh::bind() const
+{
+	/* If VAOs are not supported, vao_id is zero and set_current won't get
+	called.  Thus unbind won't try to call a null function either. */
+	if(!vao_id)
+		unbind();
+	else
+	{
+		if(Buffer::current(ELEMENT_ARRAY_BUFFER))
+		{
+			unbind();
+			Buffer::unbind_from(ELEMENT_ARRAY_BUFFER);
+		}
+		if(set_current(this))
+			glBindVertexArray(vao_id);
+	}
+}
+
+void Mesh::unbind()
+{
+	if(set_current(0))
+		glBindVertexArray(0);
 }
 
 
 Mesh::Loader::Loader(Mesh &m):
-	mesh(m)
+	DataFile::ObjectLoader<Mesh>(m)
 {
-	add("vertices", &Loader::vertices);
 	add("batch",    &Loader::batch);
+	add("vertices", &Loader::vertices);
+	add("winding",  &Loader::winding);
 }
 
-void Mesh::Loader::vertices(VertexFormat f)
+void Mesh::Loader::vertices(const vector<VertexComponent> &c)
 {
-	mesh.vertices.reset(f);
-	load_sub(mesh.vertices);
+	if(c.empty())
+		throw invalid_argument("No vertex components");
+
+	VertexFormat fmt;
+	for(vector<VertexComponent>::const_iterator i=c.begin(); i!=c.end(); ++i)
+		fmt = (fmt, *i);
+	obj.vertices.reset(fmt);
+	obj.dirty |= 2;
+	load_sub(obj.vertices);
 }
 
 void Mesh::Loader::batch(PrimitiveType p)
 {
-	mesh.batches.push_back(Batch(p));
-	load_sub(mesh.batches.back());
+	Batch btc(p);
+	load_sub(btc);
+	obj.add_batch(btc);
+}
+
+void Mesh::Loader::winding(FaceWinding w)
+{
+	if(w==CLOCKWISE)
+		obj.winding = &WindingTest::clockwise();
+	else if(w==COUNTERCLOCKWISE)
+		obj.winding = &WindingTest::counterclockwise();
 }
 
 } // namespace GL