Drop Id tags and copyright notices from files

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

diff --git a/source/mesh.cpp b/source/mesh.cpp
index 4e671e037e6352e3617c1c474b7e8ecb02eac454..c5e73ebd2afd625cda3d1d4041e8b7bd03145ed5 100644 (file)
--- a/source/mesh.cpp
+++ b/source/mesh.cpp
@@ -1,11 +1,7 @@
-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include "buffer.h"
+#include "extension.h"
 #include "mesh.h"
+#include "renderer.h"
 
 using namespace std;
 
@@ -13,36 +9,146 @@ namespace Msp {
 namespace GL {
 
 Mesh::Mesh():
-       vertices(NODATA)
+       vertices(VERTEX3),
+       ibuf(0),
+       defer_ibuf(true),
+       winding(0)
+{ }
+
+Mesh::Mesh(const VertexFormat &f):
+       vertices(f),
+       ibuf(0),
+       defer_ibuf(true),
+       winding(0)
+{ }
+
+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);
+               defer_ibuf = false;
+       }
+       else
+       {
+               vertices.use_vertex_buffer(0);
+               delete ibuf;
+               ibuf = 0;
+               defer_ibuf = false;
+       }
+}
+
+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)
 {
-       vertices.use_vertex_buffer();
+       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(can_append)
+               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);
+       }
+}
+
+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();
+
+       if(ibuf)
+               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):
-       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)
 {
-       mesh.vertices.reset(f);
-       load_sub(mesh.vertices);
+       obj.vertices.reset(f);
+       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