Move vertex buffer management from VertexArray to Mesh

[libs/gl.git] / source / mesh.cpp

diff --git a/source/mesh.cpp b/source/mesh.cpp
index a1930d75d124bc35f9d6c40374b9cb7b2f64cb6a..281bb7c2c9c67a01c2507e63565779e11701bfa4 100644 (file)
--- a/source/mesh.cpp
+++ b/source/mesh.cpp
@@ -1,13 +1,6 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007-2010  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #include "buffer.h"
-#include "extension.h"
 #include "mesh.h"
+#include "renderer.h"
 
 using namespace std;
 
@@ -16,18 +9,23 @@ namespace GL {
 
 Mesh::Mesh():
        vertices(VERTEX3),
+       vbuf(0),
        ibuf(0),
-       defer_ibuf(true)
+       defer_buffers(true),
+       winding(0)
 { }
 
 Mesh::Mesh(const VertexFormat &f):
        vertices(f),
+       vbuf(0),
        ibuf(0),
-       defer_ibuf(true)
+       defer_buffers(true),
+       winding(0)
 { }
 
 Mesh::~Mesh()
 {
+       delete vbuf;
        delete ibuf;
 }
 
@@ -39,22 +37,31 @@ void Mesh::clear()
 
 void Mesh::use_buffers(bool b)
 {
+       defer_buffers = false;
        if(b)
-       {
-               vertices.use_vertex_buffer();
-               if(!ibuf)
-                       ibuf = new Buffer(ELEMENT_ARRAY_BUFFER);
-               defer_ibuf = false;
-       }
+               create_buffers();
        else
        {
                vertices.use_vertex_buffer(0);
+               delete vbuf;
+               vbuf = 0;
                delete ibuf;
                ibuf = 0;
-               defer_ibuf = false;
        }
 }
 
+void Mesh::create_buffers()
+{
+       defer_buffers = false;
+
+       if(!vbuf)
+               vbuf = new Buffer(ARRAY_BUFFER);
+       vertices.use_vertex_buffer(vbuf);
+
+       if(!ibuf)
+               ibuf = new Buffer(ELEMENT_ARRAY_BUFFER);
+}
+
 unsigned Mesh::get_n_vertices() const
 {
        return vertices.size();
@@ -67,38 +74,32 @@ float *Mesh::modify_vertex(unsigned i)
 
 void Mesh::add_batch(const Batch &b)
 {
-       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")));
-       }
-
-       if(defer_ibuf)
-       {
-               ibuf = new Buffer(ELEMENT_ARRAY_BUFFER);
-               defer_ibuf = false;
-       }
+       if(defer_buffers)
+               create_buffers();
 
-       if(can_append)
+       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_index_buffer(ibuf, prev);
+                       batches.back().use_buffer(ibuf, prev);
        }
 }
 
+void Mesh::set_winding(const WindingTest *w)
+{
+       winding = w;
+}
+
 void Mesh::draw() const
 {
        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();
@@ -107,17 +108,36 @@ void Mesh::draw() const
                Buffer::unbind_from(ELEMENT_ARRAY_BUFFER);
 }
 
+void Mesh::draw(Renderer &renderer) const
+{
+       renderer.set_vertex_array(&vertices);
+       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);
+
+       renderer.set_winding_test(0);
+}
+
 
 Mesh::Loader::Loader(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)
 {
-       obj.vertices.reset(f);
+       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);
        load_sub(obj.vertices);
 }
 
@@ -128,5 +148,13 @@ void Mesh::Loader::batch(PrimitiveType p)
        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
 } // namespace Msp