vmap/radiant/nullmodel.cpp

/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   GtkRadiant is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "nullmodel.h"

#include "debugging/debugging.h"

#include "iscenegraph.h"
#include "irender.h"
#include "iselection.h"
#include "iundo.h"
#include "ientity.h"
#include "ireference.h"
#include "igl.h"
#include "cullable.h"
#include "renderable.h"
#include "selectable.h"

#include "math/frustum.h"
#include "scenelib.h"
#include "instancelib.h"
#include "entitylib.h"

class NullModel :
        public Bounded,
        public Cullable {
    Shader *m_state;
    AABB m_aabb_local;
    RenderableSolidAABB m_aabb_solid;
    RenderableWireframeAABB m_aabb_wire;
public:
    NullModel() : m_aabb_local(Vector3(0, 0, 0), Vector3(8, 8, 8)), m_aabb_solid(m_aabb_local),
                  m_aabb_wire(m_aabb_local)
    {
        m_state = GlobalShaderCache().capture("");
    }

    ~NullModel()
    {
        GlobalShaderCache().release("");
    }

    VolumeIntersectionValue intersectVolume(const VolumeTest &volume, const Matrix4 &localToWorld) const
    {
        return volume.TestAABB(m_aabb_local, localToWorld);
    }

    const AABB &localAABB() const
    {
        return m_aabb_local;
    }

    void renderSolid(Renderer &renderer, const VolumeTest &volume, const Matrix4 &localToWorld) const
    {
        renderer.SetState(m_state, Renderer::eFullMaterials);
        renderer.addRenderable(m_aabb_solid, localToWorld);
    }

    void renderWireframe(Renderer &renderer, const VolumeTest &volume, const Matrix4 &localToWorld) const
    {
        renderer.addRenderable(m_aabb_wire, localToWorld);
    }

    void testSelect(Selector &selector, SelectionTest &test, const Matrix4 &localToWorld)
    {
        test.BeginMesh(localToWorld);

        SelectionIntersection best;
        aabb_testselect(m_aabb_local, test, best);
        if (best.valid()) {
            selector.addIntersection(best);
        }
    }
};

class NullModelInstance : public scene::Instance, public Renderable, public SelectionTestable {
    class TypeCasts {
        InstanceTypeCastTable m_casts;
    public:
        TypeCasts()
        {
            InstanceContainedCast<NullModelInstance, Bounded>::install(m_casts);
            InstanceContainedCast<NullModelInstance, Cullable>::install(m_casts);
            InstanceStaticCast<NullModelInstance, Renderable>::install(m_casts);
            InstanceStaticCast<NullModelInstance, SelectionTestable>::install(m_casts);
        }

        InstanceTypeCastTable &get()
        {
            return m_casts;
        }
    };

    NullModel &m_nullmodel;
public:

    typedef LazyStatic<TypeCasts> StaticTypeCasts;

    Bounded &get(NullType<Bounded>)
    {
        return m_nullmodel;
    }

    Cullable &get(NullType<Cullable>)
    {
        return m_nullmodel;
    }

    NullModelInstance(const scene::Path &path, scene::Instance *parent, NullModel &nullmodel) :
            Instance(path, parent, this, StaticTypeCasts::instance().get()),
            m_nullmodel(nullmodel)
    {
    }

    void renderSolid(Renderer &renderer, const VolumeTest &volume) const
    {
        m_nullmodel.renderSolid(renderer, volume, Instance::localToWorld());
    }

    void renderWireframe(Renderer &renderer, const VolumeTest &volume) const
    {
        m_nullmodel.renderWireframe(renderer, volume, Instance::localToWorld());
    }

    void testSelect(Selector &selector, SelectionTest &test)
    {
        m_nullmodel.testSelect(selector, test, Instance::localToWorld());
    }
};

class NullModelNode : public scene::Node::Symbiot, public scene::Instantiable {
    class TypeCasts {
        NodeTypeCastTable m_casts;
    public:
        TypeCasts()
        {
            NodeStaticCast<NullModelNode, scene::Instantiable>::install(m_casts);
        }

        NodeTypeCastTable &get()
        {
            return m_casts;
        }
    };


    scene::Node m_node;
    InstanceSet m_instances;
    NullModel m_nullmodel;
public:

    typedef LazyStatic<TypeCasts> StaticTypeCasts;

    NullModelNode() : m_node(this, this, StaticTypeCasts::instance().get())
    {
        m_node.m_isRoot = true;
    }

    void release()
    {
        delete this;
    }

    scene::Node &node()
    {
        return m_node;
    }

    scene::Instance *create(const scene::Path &path, scene::Instance *parent)
    {
        return new NullModelInstance(path, parent, m_nullmodel);
    }

    void forEachInstance(const scene::Instantiable::Visitor &visitor)
    {
        m_instances.forEachInstance(visitor);
    }

    void insert(scene::Instantiable::Observer *observer, const scene::Path &path, scene::Instance *instance)
    {
        m_instances.insert(observer, path, instance);
    }

    scene::Instance *erase(scene::Instantiable::Observer *observer, const scene::Path &path)
    {
        return m_instances.erase(observer, path);
    }
};

NodeSmartReference NewNullModel()
{
    return NodeSmartReference((new NullModelNode)->node());
}

void NullModel_construct()
{
}

void NullModel_destroy()
{
}