irrlicht/source/Irrlicht/CMeshSceneNode.cpp

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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "CMeshSceneNode.h"
#include "IVideoDriver.h"
#include "ISceneManager.h"
#include "S3DVertex.h"
#include "ICameraSceneNode.h"
#include "IMeshCache.h"
#include "IAnimatedMesh.h"
#include "IMaterialRenderer.h"
#include "IFileSystem.h"
#ifdef _IRR_COMPILE_WITH_SHADOW_VOLUME_SCENENODE_
#include "CShadowVolumeSceneNode.h"
#else
#include "IShadowVolumeSceneNode.h"
#endif // _IRR_COMPILE_WITH_SHADOW_VOLUME_SCENENODE_
namespace irr
{
namespace scene
{
//! constructor
CMeshSceneNode::CMeshSceneNode(IMesh* mesh, ISceneNode* parent, ISceneManager* mgr, s32 id,
const core::vector3df& position, const core::vector3df& rotation,
const core::vector3df& scale)
: IMeshSceneNode(parent, mgr, id, position, rotation, scale), Mesh(0), Shadow(0),
PassCount(0), ReadOnlyMaterials(false)
{
#ifdef _DEBUG
setDebugName("CMeshSceneNode");
#endif
setMesh(mesh);
}
//! destructor
CMeshSceneNode::~CMeshSceneNode()
{
if (Shadow)
Shadow->drop();
if (Mesh)
Mesh->drop();
}
//! frame
void CMeshSceneNode::OnRegisterSceneNode()
{
if (IsVisible)
{
// because this node supports rendering of mixed mode meshes consisting of
// transparent and solid material at the same time, we need to go through all
// materials, check of what type they are and register this node for the right
// render pass according to that.
video::IVideoDriver* driver = SceneManager->getVideoDriver();
PassCount = 0;
int transparentCount = 0;
int solidCount = 0;
// count transparent and solid materials in this scene node
if (ReadOnlyMaterials && Mesh)
{
// count mesh materials
for (u32 i=0; i<Mesh->getMeshBufferCount(); ++i)
{
scene::IMeshBuffer* mb = Mesh->getMeshBuffer(i);
video::IMaterialRenderer* rnd = mb ? driver->getMaterialRenderer(mb->getMaterial().MaterialType) : 0;
if (rnd && rnd->isTransparent())
++transparentCount;
else
++solidCount;
if (solidCount && transparentCount)
break;
}
}
else
{
// count copied materials
for (u32 i=0; i<Materials.size(); ++i)
{
video::IMaterialRenderer* rnd =
driver->getMaterialRenderer(Materials[i].MaterialType);
if ((rnd && rnd->isTransparent()) || Materials[i].isTransparent())
++transparentCount;
else
++solidCount;
if (solidCount && transparentCount)
break;
}
}
// register according to material types counted
if (solidCount)
SceneManager->registerNodeForRendering(this, scene::ESNRP_SOLID);
if (transparentCount)
SceneManager->registerNodeForRendering(this, scene::ESNRP_TRANSPARENT);
ISceneNode::OnRegisterSceneNode();
}
}
//! renders the node.
void CMeshSceneNode::render()
{
video::IVideoDriver* driver = SceneManager->getVideoDriver();
if (!Mesh || !driver)
return;
bool isTransparentPass =
SceneManager->getSceneNodeRenderPass() == scene::ESNRP_TRANSPARENT;
++PassCount;
driver->setTransform(video::ETS_WORLD, AbsoluteTransformation);
Box = Mesh->getBoundingBox();
if (Shadow && PassCount==1)
Shadow->updateShadowVolumes();
// for debug purposes only:
bool renderMeshes = true;
video::SMaterial mat;
if (DebugDataVisible && PassCount==1)
{
// overwrite half transparency
if (DebugDataVisible & scene::EDS_HALF_TRANSPARENCY)
{
for (u32 g=0; g<Mesh->getMeshBufferCount(); ++g)
{
mat = Materials[g];
mat.MaterialType = video::EMT_TRANSPARENT_ADD_COLOR;
driver->setMaterial(mat);
driver->drawMeshBuffer(Mesh->getMeshBuffer(g));
}
renderMeshes = false;
}
}
// render original meshes
if (renderMeshes)
{
for (u32 i=0; i<Mesh->getMeshBufferCount(); ++i)
{
scene::IMeshBuffer* mb = Mesh->getMeshBuffer(i);
if (mb)
{
const video::SMaterial& material = ReadOnlyMaterials ? mb->getMaterial() : Materials[i];
video::IMaterialRenderer* rnd = driver->getMaterialRenderer(material.MaterialType);
bool transparent = (rnd && rnd->isTransparent());
// only render transparent buffer if this is the transparent render pass
// and solid only in solid pass
if (transparent == isTransparentPass)
{
driver->setMaterial(material);
driver->drawMeshBuffer(mb);
}
}
}
}
// for debug purposes only:
if (DebugDataVisible && PassCount==1)
{
video::SMaterial m;
m.Lighting = false;
m.AntiAliasing=0;
driver->setMaterial(m);
if (DebugDataVisible & scene::EDS_BBOX)
{
driver->draw3DBox(Box, video::SColor(255,255,255,255));
}
if (DebugDataVisible & scene::EDS_BBOX_BUFFERS)
{
for (u32 g=0; g<Mesh->getMeshBufferCount(); ++g)
{
driver->draw3DBox(
Mesh->getMeshBuffer(g)->getBoundingBox(),
video::SColor(255,190,128,128));
}
}
if (DebugDataVisible & scene::EDS_NORMALS)
{
// draw normals
const f32 debugNormalLength = SceneManager->getParameters()->getAttributeAsFloat(DEBUG_NORMAL_LENGTH);
const video::SColor debugNormalColor = SceneManager->getParameters()->getAttributeAsColor(DEBUG_NORMAL_COLOR);
const u32 count = Mesh->getMeshBufferCount();
for (u32 i=0; i != count; ++i)
{
driver->drawMeshBufferNormals(Mesh->getMeshBuffer(i), debugNormalLength, debugNormalColor);
}
}
// show mesh
if (DebugDataVisible & scene::EDS_MESH_WIRE_OVERLAY)
{
m.Wireframe = true;
driver->setMaterial(m);
for (u32 g=0; g<Mesh->getMeshBufferCount(); ++g)
{
driver->drawMeshBuffer(Mesh->getMeshBuffer(g));
}
}
}
}
//! Removes a child from this scene node.
//! Implemented here, to be able to remove the shadow properly, if there is one,
//! or to remove attached childs.
bool CMeshSceneNode::removeChild(ISceneNode* child)
{
if (child && Shadow == child)
{
Shadow->drop();
Shadow = 0;
}
return ISceneNode::removeChild(child);
}
//! returns the axis aligned bounding box of this node
const core::aabbox3d<f32>& CMeshSceneNode::getBoundingBox() const
{
return Mesh ? Mesh->getBoundingBox() : Box;
}
//! returns the material based on the zero based index i. To get the amount
//! of materials used by this scene node, use getMaterialCount().
//! This function is needed for inserting the node into the scene hierarchy on a
//! optimal position for minimizing renderstate changes, but can also be used
//! to directly modify the material of a scene node.
video::SMaterial& CMeshSceneNode::getMaterial(u32 i)
{
if (Mesh && ReadOnlyMaterials && i<Mesh->getMeshBufferCount())
{
ReadOnlyMaterial = Mesh->getMeshBuffer(i)->getMaterial();
return ReadOnlyMaterial;
}
if (i >= Materials.size())
return ISceneNode::getMaterial(i);
return Materials[i];
}
//! returns amount of materials used by this scene node.
u32 CMeshSceneNode::getMaterialCount() const
{
if (Mesh && ReadOnlyMaterials)
return Mesh->getMeshBufferCount();
return Materials.size();
}
//! Sets a new mesh
void CMeshSceneNode::setMesh(IMesh* mesh)
{
if (mesh)
{
mesh->grab();
if (Mesh)
Mesh->drop();
Mesh = mesh;
copyMaterials();
}
}
//! Creates shadow volume scene node as child of this node
//! and returns a pointer to it.
IShadowVolumeSceneNode* CMeshSceneNode::addShadowVolumeSceneNode(
const IMesh* shadowMesh, s32 id, bool zfailmethod, f32 infinity)
{
#ifdef _IRR_COMPILE_WITH_SHADOW_VOLUME_SCENENODE_
if (!SceneManager->getVideoDriver()->queryFeature(video::EVDF_STENCIL_BUFFER))
return 0;
if (!shadowMesh)
shadowMesh = Mesh; // if null is given, use the mesh of node
if (Shadow)
Shadow->drop();
Shadow = new CShadowVolumeSceneNode(shadowMesh, this, SceneManager, id, zfailmethod, infinity);
return Shadow;
#else
return 0;
#endif
}
void CMeshSceneNode::copyMaterials()
{
Materials.clear();
if (Mesh)
{
video::SMaterial mat;
for (u32 i=0; i<Mesh->getMeshBufferCount(); ++i)
{
IMeshBuffer* mb = Mesh->getMeshBuffer(i);
if (mb)
mat = mb->getMaterial();
Materials.push_back(mat);
}
}
}
//! Writes attributes of the scene node.
void CMeshSceneNode::serializeAttributes(io::IAttributes* out, io::SAttributeReadWriteOptions* options) const
{
IMeshSceneNode::serializeAttributes(out, options);
if (options && (options->Flags&io::EARWF_USE_RELATIVE_PATHS) && options->Filename)
{
const io::path path = SceneManager->getFileSystem()->getRelativeFilename(
SceneManager->getFileSystem()->getAbsolutePath(SceneManager->getMeshCache()->getMeshName(Mesh).getPath()),
options->Filename);
out->addString("Mesh", path.c_str());
}
else
out->addString("Mesh", SceneManager->getMeshCache()->getMeshName(Mesh).getPath().c_str());
out->addBool("ReadOnlyMaterials", ReadOnlyMaterials);
}
//! Reads attributes of the scene node.
void CMeshSceneNode::deserializeAttributes(io::IAttributes* in, io::SAttributeReadWriteOptions* options)
{
io::path oldMeshStr = SceneManager->getMeshCache()->getMeshName(Mesh);
io::path newMeshStr = in->getAttributeAsString("Mesh");
ReadOnlyMaterials = in->getAttributeAsBool("ReadOnlyMaterials");
if (newMeshStr != "" && oldMeshStr != newMeshStr)
{
IMesh* newMesh = 0;
IAnimatedMesh* newAnimatedMesh = SceneManager->getMesh(newMeshStr.c_str());
if (newAnimatedMesh)
newMesh = newAnimatedMesh->getMesh(0);
if (newMesh)
setMesh(newMesh);
}
// optional attribute to assign the hint to the whole mesh
if (in->existsAttribute("HardwareMappingHint") &&
in->existsAttribute("HardwareMappingBufferType"))
{
scene::E_HARDWARE_MAPPING mapping = scene::EHM_NEVER;
scene::E_BUFFER_TYPE bufferType = scene::EBT_NONE;
core::stringc smapping = in->getAttributeAsString("HardwareMappingHint");
if (smapping.equals_ignore_case("static"))
mapping = scene::EHM_STATIC;
else if (smapping.equals_ignore_case("dynamic"))
mapping = scene::EHM_DYNAMIC;
else if (smapping.equals_ignore_case("stream"))
mapping = scene::EHM_STREAM;
core::stringc sbufferType = in->getAttributeAsString("HardwareMappingBufferType");
if (sbufferType.equals_ignore_case("vertex"))
bufferType = scene::EBT_VERTEX;
else if (sbufferType.equals_ignore_case("index"))
bufferType = scene::EBT_INDEX;
else if (sbufferType.equals_ignore_case("vertexindex"))
bufferType = scene::EBT_VERTEX_AND_INDEX;
IMesh* mesh = getMesh();
if (mesh)
mesh->setHardwareMappingHint(mapping, bufferType);
}
IMeshSceneNode::deserializeAttributes(in, options);
}
//! Sets if the scene node should not copy the materials of the mesh but use them in a read only style.
/* In this way it is possible to change the materials a mesh causing all mesh scene nodes
referencing this mesh to change too. */
void CMeshSceneNode::setReadOnlyMaterials(bool readonly)
{
ReadOnlyMaterials = readonly;
}
//! Returns if the scene node should not copy the materials of the mesh but use them in a read only style
bool CMeshSceneNode::isReadOnlyMaterials() const
{
return ReadOnlyMaterials;
}
//! Creates a clone of this scene node and its children.
ISceneNode* CMeshSceneNode::clone(ISceneNode* newParent, ISceneManager* newManager)
{
if (!newParent)
newParent = Parent;
if (!newManager)
newManager = SceneManager;
CMeshSceneNode* nb = new CMeshSceneNode(Mesh, newParent,
newManager, ID, RelativeTranslation, RelativeRotation, RelativeScale);
nb->cloneMembers(this, newManager);
nb->ReadOnlyMaterials = ReadOnlyMaterials;
nb->Materials = Materials;
nb->Shadow = Shadow;
if ( nb->Shadow )
nb->Shadow->grab();
if (newParent)
nb->drop();
return nb;
}
} // end namespace scene
} // end namespace irr