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openmw/components/nifogre/ogre_nif_loader.cpp
Nicolay Korslund d32563063b Alternative fix to mesh crash bug
2010-09-02 14:12:48 +02:00

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/*
OpenMW - The completely unofficial reimplementation of Morrowind
Copyright (C) 2008-2010 Nicolay Korslund
Email: < korslund@gmail.com >
WWW: http://openmw.sourceforge.net/
This file (ogre_nif_loader.cpp) is part of the OpenMW package.
OpenMW is distributed as free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License
version 3, as published by the Free Software Foundation.
This program 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
version 3 along with this program. If not, see
http://www.gnu.org/licenses/ .
*/
#include "ogre_nif_loader.hpp"
#include <Ogre.h>
#include <stdio.h>
#include <libs/mangle/vfs/servers/ogre_vfs.hpp>
#include "../nif/nif_file.hpp"
#include "../nif/node.hpp"
#include "../nif/data.hpp"
#include "../nif/property.hpp"
#include "../nif/controller.hpp"
#include "../nif/extra.hpp"
#include <libs/platform/strings.h>
#include <vector>
#include <list>
// For warning messages
#include <iostream>
// float infinity
#include <limits>
typedef unsigned char ubyte;
using namespace std;
using namespace Ogre;
using namespace Nif;
using namespace Mangle::VFS;
NIFLoader& NIFLoader::getSingleton()
{
static NIFLoader instance;
return instance;
}
NIFLoader* NIFLoader::getSingletonPtr()
{
return &getSingleton();
}
void NIFLoader::warn(string msg)
{
std::cerr << "NIFLoader: Warn:" << msg << "\n";
}
void NIFLoader::fail(string msg)
{
std::cerr << "NIFLoader: Fail: "<< msg << std::endl;
assert(1);
}
Vector3 NIFLoader::convertVector3(const Nif::Vector& vec)
{
return Ogre::Vector3(vec.array);
}
Quaternion NIFLoader::convertRotation(const Nif::Matrix& rot)
{
Real matrix[3][3];
for (int i=0; i<3; i++)
for (int j=0; j<3; j++)
matrix[i][j] = rot.v[i].array[j];
return Quaternion(Matrix3(matrix));
}
// Helper class that computes the bounding box and of a mesh
class BoundsFinder
{
struct MaxMinFinder
{
float max, min;
MaxMinFinder()
{
min = numeric_limits<float>::infinity();
max = -min;
}
void add(float f)
{
if (f > max) max = f;
if (f < min) min = f;
}
// Return Max(max**2, min**2)
float getMaxSquared()
{
float m1 = max*max;
float m2 = min*min;
if (m1 >= m2) return m1;
return m2;
}
};
MaxMinFinder X, Y, Z;
public:
// Add 'verts' vertices to the calculation. The 'data' pointer is
// expected to point to 3*verts floats representing x,y,z for each
// point.
void add(float *data, int verts)
{
for (int i=0;i<verts;i++)
{
X.add(*(data++));
Y.add(*(data++));
Z.add(*(data++));
}
}
// True if this structure has valid values
bool isValid()
{
return
minX() <= maxX() &&
minY() <= maxY() &&
minZ() <= maxZ();
}
// Compute radius
float getRadius()
{
assert(isValid());
// The radius is computed from the origin, not from the geometric
// center of the mesh.
return sqrt(X.getMaxSquared() + Y.getMaxSquared() + Z.getMaxSquared());
}
float minX() {
return X.min;
}
float maxX() {
return X.max;
}
float minY() {
return Y.min;
}
float maxY() {
return Y.max;
}
float minZ() {
return Z.min;
}
float maxZ() {
return Z.max;
}
};
// Conversion of blend / test mode from NIF -> OGRE.
// Not in use yet, so let's comment it out.
/*
static SceneBlendFactor getBlendFactor(int mode)
{
switch(mode)
{
case 0: return SBF_ONE;
case 1: return SBF_ZERO;
case 2: return SBF_SOURCE_COLOUR;
case 3: return SBF_ONE_MINUS_SOURCE_COLOUR;
case 4: return SBF_DEST_COLOUR;
case 5: return SBF_ONE_MINUS_DEST_COLOUR;
case 6: return SBF_SOURCE_ALPHA;
case 7: return SBF_ONE_MINUS_SOURCE_ALPHA;
case 8: return SBF_DEST_ALPHA;
case 9: return SBF_ONE_MINUS_DEST_ALPHA;
// [Comment from Chris Robinson:] Can't handle this mode? :/
// case 10: return SBF_SOURCE_ALPHA_SATURATE;
default:
return SBF_SOURCE_ALPHA;
}
}
// This is also unused
static CompareFunction getTestMode(int mode)
{
switch(mode)
{
case 0: return CMPF_ALWAYS_PASS;
case 1: return CMPF_LESS;
case 2: return CMPF_EQUAL;
case 3: return CMPF_LESS_EQUAL;
case 4: return CMPF_GREATER;
case 5: return CMPF_NOT_EQUAL;
case 6: return CMPF_GREATER_EQUAL;
case 7: return CMPF_ALWAYS_FAIL;
default:
return CMPF_ALWAYS_PASS;
}
}
*/
void NIFLoader::createMaterial(const String &name,
const Vector &ambient,
const Vector &diffuse,
const Vector &specular,
const Vector &emissive,
float glossiness, float alpha,
int alphaFlags, float alphaTest,
const String &texName)
{
MaterialPtr material = MaterialManager::getSingleton().create(name, resourceGroup);
// This assigns the texture to this material. If the texture name is
// a file name, and this file exists (in a resource directory), it
// will automatically be loaded when needed. If not (such as for
// internal NIF textures that we might support later), we should
// already have inserted a manual loader for the texture.
if (!texName.empty())
{
Pass *pass = material->getTechnique(0)->getPass(0);
/*TextureUnitState *txt =*/
pass->createTextureUnitState(texName);
// As of yet UNTESTED code from Chris:
/*pass->setTextureFiltering(Ogre::TFO_ANISOTROPIC);
pass->setDepthFunction(Ogre::CMPF_LESS_EQUAL);
pass->setDepthCheckEnabled(true);
// Add transparency if NiAlphaProperty was present
if (alphaFlags != -1)
{
std::cout << "Alpha flags set!" << endl;
if ((alphaFlags&1))
{
pass->setDepthWriteEnabled(false);
pass->setSceneBlending(getBlendFactor((alphaFlags>>1)&0xf),
getBlendFactor((alphaFlags>>5)&0xf));
}
else
pass->setDepthWriteEnabled(true);
if ((alphaFlags>>9)&1)
pass->setAlphaRejectSettings(getTestMode((alphaFlags>>10)&0x7),
alphaTest);
pass->setTransparentSortingEnabled(!((alphaFlags>>13)&1));
}
else
pass->setDepthWriteEnabled(true); */
// Add transparency if NiAlphaProperty was present
if (alphaFlags != -1)
{
// The 237 alpha flags are by far the most common. Check
// NiAlphaProperty in nif/property.h if you need to decode
// other values. 237 basically means normal transparencly.
if (alphaFlags == 237)
{
// Enable transparency
pass->setSceneBlending(SBT_TRANSPARENT_ALPHA);
//pass->setDepthCheckEnabled(false);
pass->setDepthWriteEnabled(false);
}
else
warn("Unhandled alpha setting for texture " + texName);
}
}
// Add material bells and whistles
material->setAmbient(ambient.array[0], ambient.array[1], ambient.array[2]);
material->setDiffuse(diffuse.array[0], diffuse.array[1], diffuse.array[2], alpha);
material->setSpecular(specular.array[0], specular.array[1], specular.array[2], alpha);
material->setSelfIllumination(emissive.array[0], emissive.array[1], emissive.array[2]);
material->setShininess(glossiness);
}
// Takes a name and adds a unique part to it. This is just used to
// make sure that all materials are given unique names.
String NIFLoader::getUniqueName(const String &input)
{
static int addon = 0;
static char buf[8];
snprintf(buf, 8, "_%d", addon++);
// Don't overflow the buffer
if (addon > 999999) addon = 0;
return input + buf;
}
// Check if the given texture name exists in the real world. If it
// does not, change the string IN PLACE to say .dds instead and try
// that. The texture may still not exist, but no information of value
// is lost in that case.
void NIFLoader::findRealTexture(String &texName)
{
assert(vfs);
if (vfs->isFile(texName)) return;
int len = texName.size();
if (len < 4) return;
// Change texture extension to .dds
texName[len-3] = 'd';
texName[len-2] = 'd';
texName[len-1] = 's';
}
// Convert Nif::NiTriShape to Ogre::SubMesh, attached to the given
// mesh.
void NIFLoader::createOgreSubMesh(NiTriShape *shape, const String &material, std::list<VertexBoneAssignment> &vertexBoneAssignments)
{
NiTriShapeData *data = shape->data.getPtr();
SubMesh *sub = mesh->createSubMesh(shape->name.toString());
int nextBuf = 0;
// This function is just one long stream of Ogre-barf, but it works
// great.
// Add vertices
int numVerts = data->vertices.length / 3;
sub->vertexData = new VertexData();
sub->vertexData->vertexCount = numVerts;
sub->useSharedVertices = false;
VertexDeclaration *decl = sub->vertexData->vertexDeclaration;
decl->addElement(nextBuf, 0, VET_FLOAT3, VES_POSITION);
HardwareVertexBufferSharedPtr vbuf =
HardwareBufferManager::getSingleton().createVertexBuffer(
VertexElement::getTypeSize(VET_FLOAT3),
numVerts, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
vbuf->writeData(0, vbuf->getSizeInBytes(), data->vertices.ptr, true);
VertexBufferBinding* bind = sub->vertexData->vertexBufferBinding;
bind->setBinding(nextBuf++, vbuf);
// Vertex normals
if (data->normals.length)
{
decl->addElement(nextBuf, 0, VET_FLOAT3, VES_NORMAL);
vbuf = HardwareBufferManager::getSingleton().createVertexBuffer(
VertexElement::getTypeSize(VET_FLOAT3),
numVerts, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
vbuf->writeData(0, vbuf->getSizeInBytes(), data->normals.ptr, true);
bind->setBinding(nextBuf++, vbuf);
}
// Vertex colors
if (data->colors.length)
{
const float *colors = data->colors.ptr;
RenderSystem* rs = Root::getSingleton().getRenderSystem();
std::vector<RGBA> colorsRGB(numVerts);
RGBA *pColour = &colorsRGB.front();
for (int i=0; i<numVerts; i++)
{
rs->convertColourValue(ColourValue(colors[0],colors[1],colors[2],
colors[3]),pColour++);
colors += 4;
}
decl->addElement(nextBuf, 0, VET_COLOUR, VES_DIFFUSE);
vbuf = HardwareBufferManager::getSingleton().createVertexBuffer(
VertexElement::getTypeSize(VET_COLOUR),
numVerts, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
vbuf->writeData(0, vbuf->getSizeInBytes(), &colorsRGB.front(), true);
bind->setBinding(nextBuf++, vbuf);
}
// Texture UV coordinates
if (data->uvlist.length)
{
decl->addElement(nextBuf, 0, VET_FLOAT2, VES_TEXTURE_COORDINATES);
vbuf = HardwareBufferManager::getSingleton().createVertexBuffer(
VertexElement::getTypeSize(VET_FLOAT2),
numVerts, HardwareBuffer::HBU_STATIC_WRITE_ONLY);
vbuf->writeData(0, vbuf->getSizeInBytes(), data->uvlist.ptr, true);
bind->setBinding(nextBuf++, vbuf);
}
// Triangle faces
int numFaces = data->triangles.length;
if (numFaces)
{
HardwareIndexBufferSharedPtr ibuf = HardwareBufferManager::getSingleton().
createIndexBuffer(HardwareIndexBuffer::IT_16BIT,
numFaces,
HardwareBuffer::HBU_STATIC_WRITE_ONLY);
ibuf->writeData(0, ibuf->getSizeInBytes(), data->triangles.ptr, true);
sub->indexData->indexBuffer = ibuf;
sub->indexData->indexCount = numFaces;
sub->indexData->indexStart = 0;
}
// Set material if one was given
if (!material.empty()) sub->setMaterialName(material);
//add vertex bone assignments
for (std::list<VertexBoneAssignment>::iterator it = vertexBoneAssignments.begin();
it != vertexBoneAssignments.end(); it++)
{
sub->addBoneAssignment(*it);
}
}
// Helper math functions. Reinventing linear algebra for the win!
// Computes B = AxB (matrix*matrix)
static void matrixMul(const Matrix &A, Matrix &B)
{
for (int i=0;i<3;i++)
{
float a = B.v[0].array[i];
float b = B.v[1].array[i];
float c = B.v[2].array[i];
B.v[0].array[i] = a*A.v[0].array[0] + b*A.v[0].array[1] + c*A.v[0].array[2];
B.v[1].array[i] = a*A.v[1].array[0] + b*A.v[1].array[1] + c*A.v[1].array[2];
B.v[2].array[i] = a*A.v[2].array[0] + b*A.v[2].array[1] + c*A.v[2].array[2];
}
}
// Computes C = B + AxC*scale
static void vectorMulAdd(const Matrix &A, const Vector &B, float *C, float scale)
{
// Keep the original values
float a = C[0];
float b = C[1];
float c = C[2];
// Perform matrix multiplication, scaling and addition
for (int i=0;i<3;i++)
C[i] = B.array[i] + (a*A.v[i].array[0] + b*A.v[i].array[1] + c*A.v[i].array[2])*scale;
}
// Computes B = AxB (matrix*vector)
static void vectorMul(const Matrix &A, float *C)
{
// Keep the original values
float a = C[0];
float b = C[1];
float c = C[2];
// Perform matrix multiplication, scaling and addition
for (int i=0;i<3;i++)
C[i] = a*A.v[i].array[0] + b*A.v[i].array[1] + c*A.v[i].array[2];
}
void NIFLoader::handleNiTriShape(NiTriShape *shape, int flags, BoundsFinder &bounds)
{
assert(shape != NULL);
// Interpret flags
bool hidden = (flags & 0x01) != 0; // Not displayed
bool collide = (flags & 0x02) != 0; // Use mesh for collision
bool bbcollide = (flags & 0x04) != 0; // Use bounding box for collision
// Bounding box collision isn't implemented, always use mesh for now.
if (bbcollide)
{
collide = true;
bbcollide = false;
}
// If the object was marked "NCO" earlier, it shouldn't collide with
// anything.
if (flags & 0x800)
{
collide = false;
bbcollide = false;
}
if (!collide && !bbcollide && hidden)
// This mesh apparently isn't being used for anything, so don't
// bother setting it up.
return;
// Material name for this submesh, if any
String material;
// Skip the entire material phase for hidden nodes
if (!hidden)
{
// These are set below if present
NiTexturingProperty *t = NULL;
NiMaterialProperty *m = NULL;
NiAlphaProperty *a = NULL;
// Scan the property list for material information
PropertyList &list = shape->props;
int n = list.length();
for (int i=0; i<n; i++)
{
// Entries may be empty
if (!list.has(i)) continue;
Property *pr = &list[i];
if (pr->recType == RC_NiTexturingProperty)
t = (NiTexturingProperty*)pr;
else if (pr->recType == RC_NiMaterialProperty)
m = (NiMaterialProperty*)pr;
else if (pr->recType == RC_NiAlphaProperty)
a = (NiAlphaProperty*)pr;
}
// Texture
String texName;
if (t && t->textures[0].inUse)
{
NiSourceTexture *st = t->textures[0].texture.getPtr();
if (st->external)
{
SString tname = st->filename;
/* findRealTexture checks if the file actually
exists. If it doesn't, and the name ends in .tga, it
will try replacing the extension with .dds instead
and search for that. Bethesda at some at some point
converted all their BSA textures from tga to dds for
increased load speed, but all texture file name
references were kept as .tga.
The function replaces the name in place (that's why
we cast away the const modifier), but this is no
problem since all the nif data is stored in a local
throwaway buffer.
*/
texName = "textures\\" + tname.toString();
findRealTexture(texName);
}
else warn("Found internal texture, ignoring.");
}
// Alpha modifiers
int alphaFlags = -1;
ubyte alphaTest = 0;
if (a)
{
alphaFlags = a->flags;
alphaTest = a->data->threshold;
}
// Material
if (m || !texName.empty())
{
// If we're here, then this mesh has a material. Thus we
// need to calculate a snappy material name. It should
// contain the mesh name (mesh->getName()) but also has to
// be unique. One mesh may use many materials.
material = getUniqueName(mesh->getName());
if (m)
{
// Use NiMaterialProperty data to create the data
const S_MaterialProperty *d = m->data;
createMaterial(material, d->ambient, d->diffuse, d->specular, d->emissive,
d->glossiness, d->alpha, alphaFlags, alphaTest, texName);
}
else
{
// We only have a texture name. Create a default
// material for it.
Vector zero, one;
for (int i=0; i<3;i++)
{
zero.array[i] = 0.0;
one.array[i] = 1.0;
}
createMaterial(material, one, one, zero, zero, 0.0, 1.0,
alphaFlags, alphaTest, texName);
}
}
} // End of material block, if(!hidden) ...
/* Do in-place transformation of all the vertices and normals. This
is pretty messy stuff, but we need it to make the sub-meshes
appear in the correct place. Neither Ogre nor Bullet support
nested levels of sub-meshes with transformations applied to each
level.
*/
NiTriShapeData *data = shape->data.getPtr();
int numVerts = data->vertices.length / 3;
float *ptr = (float*)data->vertices.ptr;
float *optr = ptr;
std::list<VertexBoneAssignment> vertexBoneAssignments;
//use niskindata for the position of vertices.
if (!shape->skin.empty())
{
// vector that stores if the position if a vertex is absolute
std::vector<bool> vertexPosAbsolut(numVerts,false);
float *ptrNormals = (float*)data->normals.ptr;
//the bone from skin->bones[boneIndex] is linked to skin->data->bones[boneIndex]
//the first one contains a link to the bone, the second vertex transformation
//relative to the bone
int boneIndex = 0;
Bone *bonePtr;
Vector3 vecPos;
Quaternion vecRot;
std::vector<NiSkinData::BoneInfo> boneList = shape->skin->data->bones;
/*
Iterate through the boneList which contains what vertices are linked to
the bone (it->weights array) and at what position (it->trafo)
That position is added to every vertex.
*/
for (std::vector<NiSkinData::BoneInfo>::iterator it = boneList.begin();
it != boneList.end(); it++)
{
//get the bone from bones array of skindata
bonePtr = skel->getBone(shape->skin->bones[boneIndex].name.toString());
// final_vector = old_vector + old_rotation*new_vector*old_scale
vecPos = bonePtr->_getDerivedPosition() +
bonePtr->_getDerivedOrientation() * convertVector3(it->trafo->trans);
vecRot = bonePtr->_getDerivedOrientation() * convertRotation(it->trafo->rotation);
for (unsigned int i=0; i<it->weights.length; i++)
{
unsigned int verIndex = (it->weights.ptr + i)->vertex;
//Check if the vertex is relativ, FIXME: Is there a better solution?
if (vertexPosAbsolut[verIndex] == false)
{
//apply transformation to the vertices
Vector3 absVertPos = vecPos + vecRot * Vector3(ptr + verIndex *3);
//convert it back to float *
for (int j=0; j<3; j++)
(ptr + verIndex*3)[j] = absVertPos[j];
//apply rotation to the normals (not every vertex has a normal)
//FIXME: I guessed that vertex[i] = normal[i], is that true?
if (verIndex < data->normals.length)
{
Vector3 absNormalsPos = vecRot * Vector3(ptrNormals + verIndex *3);
for (int j=0; j<3; j++)
(ptrNormals + verIndex*3)[j] = absNormalsPos[j];
}
vertexPosAbsolut[verIndex] = true;
}
VertexBoneAssignment vba;
vba.boneIndex = bonePtr->getHandle();
vba.vertexIndex = verIndex;
vba.weight = (it->weights.ptr + i)->weight;
vertexBoneAssignments.push_back(vba);
}
boneIndex++;
}
}
else
{
// Rotate, scale and translate all the vertices,
const Matrix &rot = shape->trafo->rotation;
const Vector &pos = shape->trafo->pos;
float scale = shape->trafo->scale;
for (int i=0; i<numVerts; i++)
{
vectorMulAdd(rot, pos, ptr, scale);
ptr += 3;
}
// Remember to rotate all the vertex normals as well
if (data->normals.length)
{
ptr = (float*)data->normals.ptr;
for (int i=0; i<numVerts; i++)
{
vectorMul(rot, ptr);
ptr += 3;
}
}
}
if (!hidden)
{
// Add this vertex set to the bounding box
bounds.add(optr, numVerts);
// Create the submesh
createOgreSubMesh(shape, material, vertexBoneAssignments);
}
}
void NIFLoader::handleNode(Nif::Node *node, int flags,
const Transformation *trafo, BoundsFinder &bounds, Bone *parentBone)
{
// Accumulate the flags from all the child nodes. This works for all
// the flags we currently use, at least.
flags |= node->flags;
// Check for extra data
Extra *e = node;
while (!e->extra.empty())
{
// Get the next extra data in the list
e = e->extra.getPtr();
assert(e != NULL);
if (e->recType == RC_NiStringExtraData)
{
// String markers may contain important information
// affecting the entire subtree of this node
NiStringExtraData *sd = (NiStringExtraData*)e;
if (sd->string == "NCO")
// No collision. Use an internal flag setting to mark this.
flags |= 0x800;
else if (sd->string == "MRK")
// Marker objects. These are only visible in the
// editor. Until and unless we add an editor component to
// the engine, just skip this entire node.
return;
}
}
Bone *bone = 0;
// create skeleton or add bones
if (node->recType == RC_NiNode)
{
//FIXME: "Bip01" isn't every time the root bone
if (node->name == "Bip01" || node->name == "Root Bone") //root node, create a skeleton
{
skel = SkeletonManager::getSingleton().create(getSkeletonName(), resourceGroup, true);
/*if (node->extra->recType == RC_NiTextKeyExtraData )
{
//TODO: Get animation names
std::cout << node->name.toString() << " is root bone and has textkeyextradata!\n";
}*/
}
if (!skel.isNull()) //if there is a skeleton
{
std::string name = node->name.toString();
// Quick-n-dirty workaround for the fact that several
// bones may have the same name.
if(!skel->hasBone(name))
{
bone = skel->createBone(name);
if (parentBone)
parentBone->addChild(bone);
bone->setInheritOrientation(true);
bone->setPosition(convertVector3(node->trafo->pos));
bone->setOrientation(convertRotation(node->trafo->rotation));
}
}
}
// Apply the parent transformation to this node. We overwrite the
// existing data with the final transformation.
if (trafo)
{
// Get a non-const reference to the node's data, since we're
// overwriting it. TODO: Is this necessary?
Transformation &final = *((Transformation*)node->trafo);
// For both position and rotation we have that:
// final_vector = old_vector + old_rotation*new_vector*old_scale
vectorMulAdd(trafo->rotation, trafo->pos, final.pos.array, trafo->scale);
vectorMulAdd(trafo->rotation, trafo->velocity, final.velocity.array, trafo->scale);
// Merge the rotations together
matrixMul(trafo->rotation, final.rotation);
// Scalar values are so nice to deal with. Why can't everything
// just be scalar?
final.scale *= trafo->scale;
}
// For NiNodes, loop through children
if (node->recType == RC_NiNode)
{
NodeList &list = ((NiNode*)node)->children;
int n = list.length();
for (int i=0; i<n; i++)
{
if (list.has(i))
handleNode(&list[i], flags, node->trafo, bounds, bone);
}
}
else if (node->recType == RC_NiTriShape)
// For shapes
handleNiTriShape(dynamic_cast<NiTriShape*>(node), flags, bounds);
}
void NIFLoader::loadResource(Resource *resource)
{
resourceName = "";
mesh = 0;
skel.setNull();
// Set up the VFS if it hasn't been done already
if (!vfs) vfs = new OgreVFS(resourceGroup);
// Get the mesh
mesh = dynamic_cast<Mesh*>(resource);
assert(mesh);
// Look it up
resourceName = mesh->getName();
if (!vfs->isFile(resourceName))
{
warn("File not found.");
return;
}
// Helper that computes bounding boxes for us.
BoundsFinder bounds;
// Load the NIF. TODO: Wrap this in a try-catch block once we're out
// of the early stages of development. Right now we WANT to catch
// every error as early and intrusively as possible, as it's most
// likely a sign of incomplete code rather than faulty input.
NIFFile nif(vfs->open(resourceName), resourceName);
if (nif.numRecords() < 1)
{
warn("Found no records in NIF.");
return;
}
// The first record is assumed to be the root node
Record *r = nif.getRecord(0);
assert(r != NULL);
Nif::Node *node = dynamic_cast<Nif::Node*>(r);
if (node == NULL)
{
warn("First record in file was not a node, but a " +
r->recName.toString() + ". Skipping file.");
return;
}
// Handle the node
handleNode(node, 0, NULL, bounds, 0);
// set the bounding value.
if (bounds.isValid())
{
mesh->_setBounds(AxisAlignedBox(bounds.minX(), bounds.minY(), bounds.minZ(),
bounds.maxX(), bounds.maxY(), bounds.maxZ()));
mesh->_setBoundingSphereRadius(bounds.getRadius());
}
// set skeleton
// if (!skel.isNull())
// mesh->setSkeletonName(getSkeletonName());
}
MeshPtr NIFLoader::load(const std::string &name,
const std::string &group)
{
MeshManager *m = MeshManager::getSingletonPtr();
// Check if the resource already exists
ResourcePtr ptr = m->getByName(name, group);
if (!ptr.isNull())
return MeshPtr(ptr);
// Nope, create a new one.
return MeshManager::getSingleton().createManual(name, group, NIFLoader::getSingletonPtr());
}
/* More code currently not in use, from the old D source. This was
used in the first attempt at loading NIF meshes, where each submesh
in the file was given a separate bone in a skeleton. Unfortunately
the OGRE skeletons can't hold more than 256 bones, and some NIFs go
way beyond that. The code might be of use if we implement animated
submeshes like this (the part of the NIF that is animated is
usually much less than the entire file, but the method might still
not be water tight.)
// Insert a raw RGBA image into the texture system.
extern "C" void ogre_insertTexture(char* name, uint32_t width, uint32_t height, void *data)
{
TexturePtr texture = TextureManager::getSingleton().createManual(
name, // name
"General", // group
TEX_TYPE_2D, // type
width, height, // width & height
0, // number of mipmaps
PF_BYTE_RGBA, // pixel format
TU_DEFAULT); // usage; should be TU_DYNAMIC_WRITE_ONLY_DISCARDABLE for
// textures updated very often (e.g. each frame)
// Get the pixel buffer
HardwarePixelBufferSharedPtr pixelBuffer = texture->getBuffer();
// Lock the pixel buffer and get a pixel box
pixelBuffer->lock(HardwareBuffer::HBL_NORMAL); // for best performance use HBL_DISCARD!
const PixelBox& pixelBox = pixelBuffer->getCurrentLock();
void *dest = pixelBox.data;
// Copy the data
memcpy(dest, data, width*height*4);
// Unlock the pixel buffer
pixelBuffer->unlock();
}
*/
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