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ConvertToInventor.cpp
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ConvertToInventor.cpp
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//
// ConvertToInventor converts OSG scene graph to Inventor or VRML 1 scene graph
//
// It requires OSG and Inventor compatible library, such as Coin,
// SGI Inventor , or TGS Inventor.
//
//
// Autor: PCJohn (peciva _at fit.vutbr.cz)
//
// License: public domain
//
//
// THIS SOFTWARE IS NOT COPYRIGHTED
//
// This source code is offered for use in the public domain.
// You may use, modify or distribute it freely.
//
// This source code is distributed in the hope that it will be useful but
// WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
// DISCLAIMED. This includes but is not limited to warranties of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
//
// If you find the source code useful, authors will kindly welcome
// if you give them credit and keep their names with their source code,
// but you are not forced to do so.
//
#include <osg/BlendFunc>
#include <osg/Billboard>
#include <osg/Geode>
#include <osg/Geometry>
#include <osg/Group>
#include <osg/LightModel>
#include <osg/LOD>
#include <osg/Material>
#include <osg/MatrixTransform>
#include <osg/Node>
#include <osg/NodeVisitor>
#include <osg/PositionAttitudeTransform>
#include <osg/PrimitiveSet>
#include <osg/ShapeDrawable>
#include <osg/TexEnv>
#include <osg/TexGen>
#include <Inventor/nodes/SoBaseColor.h>
#include <Inventor/nodes/SoCoordinate3.h>
#include <Inventor/nodes/SoCoordinate4.h>
#include <Inventor/nodes/SoCube.h>
#include <Inventor/nodes/SoCone.h>
#include <Inventor/nodes/SoCylinder.h>
#include <Inventor/nodes/SoFaceSet.h>
#include <Inventor/nodes/SoIndexedFaceSet.h>
#include <Inventor/nodes/SoIndexedLineSet.h>
#include <Inventor/nodes/SoIndexedTriangleStripSet.h>
#include <Inventor/nodes/SoLightModel.h>
#include <Inventor/nodes/SoLineSet.h>
#include <Inventor/nodes/SoLOD.h>
#include <Inventor/nodes/SoLevelOfDetail.h>
#include <Inventor/nodes/SoMaterial.h>
#include <Inventor/nodes/SoMatrixTransform.h>
#include <Inventor/nodes/SoNode.h>
#include <Inventor/nodes/SoNormal.h>
#include <Inventor/nodes/SoNormalBinding.h>
#include <Inventor/nodes/SoPointSet.h>
#include <Inventor/nodes/SoSeparator.h>
#include <Inventor/nodes/SoShapeHints.h>
#include <Inventor/nodes/SoSphere.h>
#include <Inventor/nodes/SoTexture2.h>
#include <Inventor/nodes/SoTextureCoordinate2.h>
#include <Inventor/nodes/SoTextureCoordinate3.h>
#include <Inventor/nodes/SoTextureCoordinateEnvironment.h>
#include <Inventor/nodes/SoTransform.h>
#include <Inventor/nodes/SoTranslation.h>
#include <Inventor/nodes/SoTriangleStripSet.h>
#include <Inventor/fields/SoFields.h>
#ifdef __COIN__
#include <Inventor/nodes/SoTransparencyType.h>
#include <Inventor/VRMLnodes/SoVRMLBillboard.h>
#endif
#include "ConvertToInventor.h"
#include <assert.h>
#define DEBUG_IV_WRITER 1
// Considerations for VRML1 support:
//
// SoSeparator: supported (only renderCulling field)
// SoCoordinate3: supported
// SoCoordinate4: no -> conversion to Coordinate3 required <---- missing
// SoTextureCoordinate2: supported
// SoTextureCoordinate3: no - 3D textures not supported by VRML1
// SoTextureCoordinateEnvironment no <- should texturing be disabled in this case?
// SoTextureCoordinateBinding: no -> indexing is probably mandatory
// SoNormal: supported
// SoNormalBinding: supported (all modes supported, including non-indexed modes)
// SoMaterial: supported
// SoMaterialBinding: supported (all modes supported, including non-indexed modes)
// SoBaseColor: no -> using SoMaterial instead
// SoPointSet: supported
// SoLineSet: no -> using SoIndexedListSet instead
// SoIndexedLineSet: supported
// SoIndexedTriangleStripSet: no -> using SoIndexedFaceSet instead
// SoTriangleStripSet: no -> using SoIndexedFaceSet instead
// SoMatrixTransform: supported
// SoTransform: supported
// SoTransparencyType: no <---- missing
// SoShapeHints: supported
// SoCone,SoCube,SoCylinder,SoSphere supported
// SoTranslation supported
// SoLightModel: ?
// SoLOD: supported
// SoLevelOfDetail: no
// Node list from VRML1 documentation:
// shape nodes: AsciiText, Cone, Cube, Cylinder, IndexedFaceSet, IndexedLineSet, PointSet, Sphere
// properties nodes: Coordinate3, FontStyle, Info, Material, MaterialBinding, Normal, NormalBinding,
// Texture2, Texture2Transform, TextureCoordinate2, ShapeHints
// transformantion nodes: MatrixTransform, Rotation, Scale, Transform, Translation
// group nodes: Separator, Switch, WWWAnchor, LOD
// cameras: OrthographicCamera, PerspectiveCamera
// lights: DirectionalLight, PointLight, SpotLight
// others: WWWInline
ConvertToInventor::ConvertToInventor() : osg::NodeVisitor(TRAVERSE_ALL_CHILDREN)
{
// Enable/disable using of some extensions introduced by TGS and Coin.
//
// For instance, GL_REPLACE texturing mode is extension
// and it will not be used if extensions are not enabled.
#ifdef __COIN__
useIvExtensions = true;
#else
useIvExtensions = false;
#endif
vrml1Conversion = false;
uniqueIdGenerator = 1;
// Scene root
ivRoot = new SoSeparator;
ivRoot->ref();
// OSG -> Inventor coordinate system conversion
SoMatrixTransform *mt = new SoMatrixTransform;
mt->matrix.setValue(1.f, 0.f, 0.f, 0.f,
0.f, 0.f, -1.f, 0.f,
0.f, 1.f, 0.f, 0.f,
0.f, 0.f, 0.f, 1.f);
ivRoot->addChild(mt);
#if 0 // Setting everything to defaults may not be correct option
// because the user may want to have model whose material,etc.
// will be specified up in the scene graph and he may, for instance,
// reuse the model with different materials.
// However, I am not sure anyway. PCJohn-2007-08-27
// OSG defaults to: Inventor defaults to:
// GL_LIGHTING enabled enabled
SoLightModel *lm = new SoLightModel;
lm->model = SoLightModel::PHONG;
ivRoot->addChild(lm);
// OSG defaults to: Inventor defaults to:
// lighting: one side one side lighting
// frontFace: COUNTER_CLOCKWISE COUNTER_CLOCKWISE
// culling: DISABLED DISABLED
// faceCulling: GL_BACK GL_BACK
SoShapeHints *sh = new SoShapeHints;
sh->vertexOrdering = SoShapeHints::UNKNOWN_ORDERING;
ivRoot->addChild(sh);
// Make sure texturing is OFF
ivRoot->addChild(new SoTexture2D);
// Put default material
ivRoot->addChild(new SoMaterial);
#endif
// initialize Inventor state stack
ivStack.push(InventorState::createTopLevelState(ivRoot));
}
ConvertToInventor::~ConvertToInventor()
{
assert(ivStack.size() == 1 && "Not all InventorStates were popped from ivStack.");
if (ivRoot) ivRoot->unref();
}
SoNode* ConvertToInventor::getIvSceneGraph() const
{
return ivRoot;
}
void ConvertToInventor::apply(osg::Node &node)
{
#ifdef DEBUG_IV_WRITER
osg::notify(osg::INFO) << "IvWriter: node traversed" << std::endl;
#endif
traverse(node);
}
template<typename fieldClass, typename ivType, typename osgType>
void osgArray2ivMField_template(const osg::Array *array, fieldClass &field, int startIndex = 0, int stopIndex = 0, int numItemsUntilMinusOne = 0)
{
int i,num = array->getNumElements();
if (startIndex!=0 || stopIndex!=0) {
num = stopIndex - startIndex;
assert(stopIndex >= startIndex);
assert(startIndex >= 0 && stopIndex >= 0);
assert(stopIndex <= int(array->getNumElements()));
}
// update num if numItemsUntilMinusOne > 0
if (numItemsUntilMinusOne > 0 && num >= 1)
num += (num-1) / numItemsUntilMinusOne;
field.setNum(num);
ivType *a = field.startEditing();
osgType *ptr = (osgType*)array->getDataPointer() + startIndex;
if (numItemsUntilMinusOne <= 0)
for (i=0; i<num; i++, ptr++)
a[i] = ivType(*ptr);
else {
int z;
for (i=0, z=0; i<num; i++)
if (z == numItemsUntilMinusOne) {
a[i] = -1;
z = 0;
} else {
a[i] = ivType(*ptr);
ptr++;
z++;
}
}
field.finishEditing();
}
template<typename ivType, typename osgType, int shift>
void osgArray2ivMField_composite_template_worker(ivType *dest, osgType *src, int num, int numItemsUntilMinusOne = 0)
{
for (int i=0; i<num; i++, src+=shift)
dest[i] = ivType(src);
}
template<>
void osgArray2ivMField_composite_template_worker<SbColor, GLubyte, 4>(SbColor *dest, GLubyte *src, int num, int numItemsUntilMinusOne)
{
for (int i=0; i<num; i++, src+=4)
dest[i].setValue(src[0]/255.f, src[1]/255.f, src[2]/255.f);
}
template<>
void osgArray2ivMField_composite_template_worker<SbVec3f, float, 2>(SbVec3f *dest, float *src, int num, int numItemsUntilMinusOne)
{
for (int i=0; i<num; i++, src+=2)
dest[i].setValue(src[0], src[1], 0.f);
}
template<typename fieldClass, typename ivType, typename osgType, int shift>
void osgArray2ivMField_composite_template(const osg::Array *array, fieldClass &field, int startIndex = 0, int stopIndex = 0, int numItemsUntilMinusOne = 0)
{
int num = array->getNumElements();
if (startIndex!=0 || stopIndex!=0) {
num = stopIndex - startIndex;
assert(stopIndex >= startIndex);
assert(startIndex >= 0 && stopIndex >= 0);
assert(stopIndex <= int(array->getNumElements()));
}
assert(numItemsUntilMinusOne <= 0 && "Composite template must have numItemsUntilMinusOne set to 0.");
field.setNum(num);
ivType *a = field.startEditing();
osgType *ptr = (osgType*)array->getDataPointer() + startIndex;
osgArray2ivMField_composite_template_worker<ivType, osgType, shift>(a, ptr, num, 0);
field.finishEditing();
}
template<typename fieldClass, typename ivType, typename osgType, int numComponents>
void osgArray2ivMField_pack_template(const osg::Array *array, fieldClass &field,
osgType mul, osgType max, osgType min,
int startIndex = 0, int stopIndex = 0, int numItemsUntilMinusOne = 0)
{
int i,num = array->getNumElements();
if (startIndex!=0 || stopIndex!=0) {
num = stopIndex - startIndex;
assert(stopIndex >= startIndex);
assert(startIndex >= 0 && stopIndex >= 0);
assert(stopIndex <= int(array->getNumElements()));
}
assert(numItemsUntilMinusOne <= 0 && "Pack template must have numItemsUntilMinusOne set to 0.");
field.setNum(num);
ivType *a = field.startEditing();
osgType *ptr = (osgType*)array->getDataPointer() + startIndex;
for (i=0; i<num; i++, ptr++) {
a[i] = ivType(0);
for (int j=0; j<numComponents; j++) {
osgType tmp = ptr[j]*mul;
if (tmp > max) tmp = max;
if (tmp < min) tmp = min;
a[i] |= ivType(tmp) << (((numComponents-1)*8)-(j*8));
}
}
field.finishEditing();
}
template<typename fieldClass, typename fieldItemType>
bool ivApplicateIntType(const osg::Array *array, fieldClass &field, int startIndex, int stopIndex, int numItemsUntilMinusOne)
{
if (field.isOfType(fieldClass::getClassTypeId()))
{
switch (array->getType())
{
case osg::Array::ByteArrayType: osgArray2ivMField_template<fieldClass, fieldItemType, int8_t>
(array, field, startIndex, stopIndex, numItemsUntilMinusOne); return true;
case osg::Array::UByteArrayType: osgArray2ivMField_template<fieldClass, fieldItemType, uint8_t>
(array, field, startIndex, stopIndex, numItemsUntilMinusOne); return true;
case osg::Array::ShortArrayType: osgArray2ivMField_template<fieldClass, fieldItemType, int16_t>
(array, field, startIndex, stopIndex, numItemsUntilMinusOne); return true;
case osg::Array::UShortArrayType: osgArray2ivMField_template<fieldClass, fieldItemType, uint16_t>
(array, field, startIndex, stopIndex, numItemsUntilMinusOne); return true;
case osg::Array::IntArrayType: osgArray2ivMField_template<fieldClass, fieldItemType, int32_t>
(array, field, startIndex, stopIndex, numItemsUntilMinusOne); return true;
case osg::Array::UIntArrayType: osgArray2ivMField_template<fieldClass, fieldItemType, uint32_t>
(array, field, startIndex, stopIndex, numItemsUntilMinusOne); return true;
case osg::Array::FloatArrayType: osgArray2ivMField_template<fieldClass, fieldItemType, float>
(array, field, startIndex, stopIndex, numItemsUntilMinusOne); return true;
case osg::Array::Vec4bArrayType: // FIXME: should signed values be handled differently? Like -128..127?
case osg::Array::Vec4ubArrayType: osgArray2ivMField_pack_template<fieldClass, fieldItemType, GLubyte, 4>
(array, field, 1, 255, 0, startIndex, stopIndex, numItemsUntilMinusOne); return true;
case osg::Array::Vec4ArrayType: osgArray2ivMField_pack_template<fieldClass, fieldItemType, float, 4>
(array, field, 255.f, 255.f, 0.f, startIndex, stopIndex, numItemsUntilMinusOne); return true;
}
}
return false;
}
static void osgArray2ivMField(const osg::Array *array, SoMField &field, int startIndex = 0, int stopIndex = 0, int numItemsUntilMinusOne = 0)
{
if (field.isOfType(SoMFFloat::getClassTypeId()))
{
switch (array->getType())
{
case osg::Array::FloatArrayType: osgArray2ivMField_template<SoMFFloat, float, float>
(array, (SoMFFloat&)field, startIndex, stopIndex, numItemsUntilMinusOne); return;
}
}
else if (ivApplicateIntType<SoMFInt32, int32_t>(array, (SoMFInt32&) field, startIndex, stopIndex, numItemsUntilMinusOne)) return;
else if (ivApplicateIntType<SoMFUInt32,uint32_t>(array, (SoMFUInt32&)field, startIndex, stopIndex, numItemsUntilMinusOne)) return;
else if (ivApplicateIntType<SoMFShort, int16_t>(array, (SoMFShort&) field, startIndex, stopIndex, numItemsUntilMinusOne)) return;
else if (ivApplicateIntType<SoMFUShort,uint16_t>(array, (SoMFUShort&)field, startIndex, stopIndex, numItemsUntilMinusOne)) return;
else if (field.isOfType(SoMFVec2f::getClassTypeId()))
{
switch (array->getType())
{
case osg::Array::Vec2ArrayType: osgArray2ivMField_composite_template<SoMFVec2f, SbVec2f, float, 2>
(array, (SoMFVec2f&)field, startIndex, stopIndex, numItemsUntilMinusOne); return;
}
}
else if (field.isOfType(SoMFVec3f::getClassTypeId()))
{
switch (array->getType())
{
case osg::Array::Vec3ArrayType: osgArray2ivMField_composite_template<SoMFVec3f, SbVec3f, float, 3>
(array, (SoMFVec3f&)field, startIndex, stopIndex, numItemsUntilMinusOne); return;
case osg::Array::Vec2ArrayType: osgArray2ivMField_composite_template<SoMFVec3f, SbVec3f, float, 2>
(array, (SoMFVec3f&)field, startIndex, stopIndex, numItemsUntilMinusOne); return;
}
}
else if (field.isOfType(SoMFVec4f::getClassTypeId()))
{
switch (array->getType()) {
case osg::Array::Vec4ArrayType: osgArray2ivMField_composite_template<SoMFVec4f, SbVec4f, float, 4>
(array, (SoMFVec4f&)field, startIndex, stopIndex, numItemsUntilMinusOne); return;
}
}
else if (field.isOfType(SoMFColor::getClassTypeId()))
{
switch (array->getType())
{
case osg::Array::Vec3ArrayType: osgArray2ivMField_composite_template<SoMFColor, SbColor, float, 3>
(array, (SoMFColor&)field, startIndex, stopIndex, numItemsUntilMinusOne); return;
case osg::Array::Vec4ArrayType: osgArray2ivMField_composite_template<SoMFColor, SbColor, float, 4>
(array, (SoMFColor&)field, startIndex, stopIndex, numItemsUntilMinusOne); return;
case osg::Array::Vec4ubArrayType: osgArray2ivMField_composite_template<SoMFColor, SbColor, GLubyte, 4>
(array, (SoMFColor&)field, startIndex, stopIndex, numItemsUntilMinusOne); return;
}
};
osg::notify(osg::WARN) << "IvWriter: No direct conversion for array. "
<< "The file may be broken." << std::endl;
}
template<typename variableType, typename indexType>
bool ivDeindex(variableType *dest, const variableType *src, const int srcNum,
const indexType *indices, const int numToProcess)
{
for (int i=0; i<numToProcess; i++) {
int index = indices[i];
if (index<0 || index>=srcNum) return false;
dest[i] = src[index];
}
return true;
}
template<typename variableType>
bool ivDeindex(variableType *dest, const variableType *src, const int srcNum,
const osg::Array *indices, const int numToProcess)
{
if (int(indices->getNumElements()) < numToProcess) {
assert(0 && "Something is wrong: indices array is shorter than numToProcess.");
return false;
}
switch (indices->getType()) {
case osg::Array::ByteArrayType:
case osg::Array::UByteArrayType:
return ivDeindex<variableType, GLbyte>(dest, src, srcNum,
(GLbyte*)indices->getDataPointer(), numToProcess);
break;
case osg::Array::ShortArrayType:
case osg::Array::UShortArrayType:
return ivDeindex<variableType, GLshort>(dest, src, srcNum,
(GLshort*)indices->getDataPointer(), numToProcess);
break;
case osg::Array::IntArrayType:
case osg::Array::UIntArrayType:
return ivDeindex<variableType, GLint>(dest, src, srcNum,
(GLint*)indices->getDataPointer(), numToProcess);
break;
default:
assert(0 && "Index of strange type.");
return false;
}
}
template<typename variableType, typename fieldType>
bool ivProcessArray(const osg::Array *indices, const osg::Array *drawElemIndices,
fieldType *destField, const fieldType *srcField,
int startIndex, int numToProcess)
{
bool ok = true;
if (indices || drawElemIndices) {
// "deindex" original data
if (indices && !drawElemIndices)
ok = ivDeindex<variableType>(destField->startEditing(),
srcField->getValues(startIndex),
srcField->getNum(), indices, numToProcess); else
if (!indices && drawElemIndices)
ok = ivDeindex<variableType>(destField->startEditing(),
srcField->getValues(startIndex),
srcField->getNum(), drawElemIndices, numToProcess);
else {
osg::notify(osg::WARN) << "IvWriter: NOT IMPLEMENTED" << std::endl;
assert(0); // FIXME:
}
destField->finishEditing();
if (!ok)
osg::notify(osg::WARN) << "IvWriter: Can not deindex - bug in model: index out of range." << std::endl;
} else {
// copy required part of original data
const variableType *src = srcField->getValues(startIndex);
assert(startIndex+numToProcess <= srcField->getNum() && "Index out of bounds.");
variableType *dest = destField->startEditing();
for (int i=0; i<numToProcess; i++)
*(dest++) = *(src++);
destField->finishEditing();
}
return ok;
}
static void processIndices(const osg::Array *indices, const osg::Array *drawElemIndices,
SoMFInt32 &ivIndices,
int startIndex, int stopIndex, int numItemsUntilMinusOne)
{
if (indices || drawElemIndices) {
if (indices && !drawElemIndices)
osgArray2ivMField(indices, ivIndices, startIndex, stopIndex, numItemsUntilMinusOne); else
if (!indices && drawElemIndices)
osgArray2ivMField(drawElemIndices, ivIndices, startIndex, stopIndex, numItemsUntilMinusOne);
else {
osg::notify(osg::WARN) << "IvWriter: NOT IMPLEMENTED" << std::endl;
assert(0); // FIXME:
}
} else {
int num = stopIndex-startIndex;
if (numItemsUntilMinusOne != 0 && num >= 1)
num += (num-1)/numItemsUntilMinusOne;
ivIndices.setNum(num);
int32_t *a = ivIndices.startEditing();
if (numItemsUntilMinusOne <= 0)
for (int i=0,j=startIndex; j<stopIndex; i++,j++)
a[i] = j;
else
for (int i=0,j=startIndex,k=0; j<stopIndex; i++)
if (k==numItemsUntilMinusOne) {
a[i]=-1;
k=0;
} else {
a[i] = j;
j++;
k++;
}
ivIndices.finishEditing();
}
}
static void postProcessDrawArrayLengths(const osg::DrawArrayLengths *drawArrayLengths, SoMFInt32 *field)
{
int origNum = field->getNum();
int newNum = origNum + drawArrayLengths->size()-1;
field->setNum(newNum);
int32_t *a = field->startEditing();
int32_t *src = a + origNum;
int32_t *dst = a + newNum;
for (osg::DrawArrayLengths::const_reverse_iterator primItr = drawArrayLengths->rbegin();
primItr!=drawArrayLengths->rend()-1;
++primItr) {
int c = *primItr;
src -= c;
dst -= c;
memmove(dst, src, sizeof(int32_t)*c);
dst--;
*dst = -1;
}
field->finishEditing();
}
static void postProcessField(const SbIntList &runLengths, osg::PrimitiveSet::Mode primType,
SoMFInt32 *field, osg::Geometry::AttributeBinding binding)
{
if (binding==osg::Geometry::BIND_OFF || binding==osg::Geometry::BIND_OVERALL ||
binding==osg::Geometry::BIND_PER_PRIMITIVE_SET)
return;
// make copy of array
const int32_t *fieldArray = field->getValues(0);
int origNum = field->getNum();
int32_t *tmpArray = new int32_t[origNum];
memcpy(tmpArray, fieldArray, origNum*sizeof(int32_t));
// compute new number of indices
int newNum = origNum;
const int l = runLengths.getLength();
switch (binding) {
case osg::Geometry::BIND_PER_VERTEX:
for (int i=0; i<l; i++)
newNum += (runLengths[i]-3)*3;
break;
case osg::Geometry::BIND_PER_PRIMITIVE:
for (int i=0; i<l; i++)
newNum += runLengths[i]-3;
break;
default:
assert(0);
}
// process indices
field->setNum(newNum);
int32_t *src = tmpArray;
int32_t *dst = field->startEditing();
int32_t *dst2 = dst;
switch (binding) {
case osg::Geometry::BIND_PER_VERTEX:
for (int i=0; i<l; i++) {
int c = runLengths[i];
*(dst++) = *(src++);
*(dst++) = *(src++);
*(dst++) = *(src++);
bool even = true;
int32_t first = *(src-3);
for (int j=3; j<c; j++) {
*(dst++) = -1;
if (primType==osg::PrimitiveSet::TRIANGLE_STRIP) {
if (even) {
*(dst++) = *(src-1);
*(dst++) = *(src-2);
} else {
*(dst++) = *(src-2);
*(dst++) = *(src-1);
}
even = !even;
} else
if (primType==osg::PrimitiveSet::TRIANGLE_FAN) {
*(dst++) = first;
*(dst++) = *(src-1);
} // FIXME: are QUADS, QUAD_STRIP, and POLYGON requiring some handling here as well? PCJohn-2007-08-25
else {
*(dst++) = *(src-2);
*(dst++) = *(src-1);
}
*(dst++) = *(src++);
}
src++; // skip -1
if (i != l-1)
*(dst++) = -1;
}
break;
case osg::Geometry::BIND_PER_PRIMITIVE:
for (int i=0; i<l; i++,src++) {
int c = runLengths[i];
*(dst++) = *(src);
for (int j=3; j<c; j++)
*(dst++) = *(src);
}
break;
default:
assert(0);
}
assert(dst2+newNum == dst && "Something wrong in the loop.");
field->finishEditing();
// free resources
delete tmpArray;
}
static void postProcessTriangleSeparation(SoIndexedShape *shape, osg::PrimitiveSet::Mode primType,
osg::Geometry::AttributeBinding normalBinding,
osg::Geometry::AttributeBinding colorBinding)
{
// compute runLengths
SbIntList runLengths;
const int32_t *a = shape->coordIndex.getValues(0);
int origNum = shape->coordIndex.getNum();
int l = 0;
for (int i=0; i<origNum; i++,a++) {
if (*a == -1) {
runLengths.append(l);
l = 0;
} else
l++;
}
if (l != 0) // append final l if field is not finished by -1
runLengths.append(l);
postProcessField(runLengths, primType, &shape->coordIndex, osg::Geometry::BIND_PER_VERTEX);
postProcessField(runLengths, primType, &shape->normalIndex, normalBinding);
postProcessField(runLengths, primType, &shape->materialIndex, colorBinding);
bool notUseTexCoords = shape->textureCoordIndex.getNum()==0 ||
(shape->textureCoordIndex.getNum()==1 && shape->textureCoordIndex[0] == -1);
if (!notUseTexCoords)
postProcessField(runLengths, primType, &shape->textureCoordIndex, osg::Geometry::BIND_PER_VERTEX);
}
static SoMaterialBinding* createMaterialBinding(const osg::Geometry *g, bool isMaterialIndexed)
{
SoMaterialBinding *materialBinding = new SoMaterialBinding;
switch (g->getColorBinding()) {
case osg::Geometry::BIND_OFF: // OFF means use material from state set (if any) for whole geometry
case osg::Geometry::BIND_OVERALL:
case osg::Geometry::BIND_PER_PRIMITIVE_SET: materialBinding->value = SoMaterialBinding::OVERALL; break;
case osg::Geometry::BIND_PER_PRIMITIVE: materialBinding->value = (isMaterialIndexed) ? SoMaterialBinding::PER_PART_INDEXED : SoMaterialBinding::PER_PART; break;
case osg::Geometry::BIND_PER_VERTEX: materialBinding->value = (isMaterialIndexed) ? SoMaterialBinding::PER_VERTEX_INDEXED : SoMaterialBinding::PER_VERTEX; break;
default: assert(0);
}
return materialBinding;
}
static SoNormalBinding* createNormalBinding(const osg::Geometry *g, bool areNormalsIndexed)
{
// Convert normal binding
SoNormalBinding *normalBinding = new SoNormalBinding;
switch (g->getNormalBinding()) {
case osg::Geometry::BIND_OFF: // FIXME: what to do with BIND_OFF value?
case osg::Geometry::BIND_OVERALL:
case osg::Geometry::BIND_PER_PRIMITIVE_SET: normalBinding->value = SoNormalBinding::OVERALL; break;
case osg::Geometry::BIND_PER_PRIMITIVE: normalBinding->value = (areNormalsIndexed) ? SoNormalBinding::PER_PART_INDEXED : SoNormalBinding::PER_PART; break;
case osg::Geometry::BIND_PER_VERTEX: normalBinding->value = (areNormalsIndexed) ? SoNormalBinding::PER_VERTEX_INDEXED : SoNormalBinding::PER_VERTEX; break;
default: assert(0);
}
return normalBinding;
}
static SoTextureCoordinateBinding* createTexCoordBinding(SbBool useIndexing)
{
SoTextureCoordinateBinding *b = new SoTextureCoordinateBinding;
b->value.setValue(useIndexing ? SoTextureCoordinateBinding::PER_VERTEX_INDEXED :
SoTextureCoordinateBinding::PER_VERTEX);
return b;
}
static SoTexture2::Model convertTexEnvMode(osg::TexEnv::Mode osgMode, bool useIvExtensions)
{
switch (osgMode) {
case GL_MODULATE: return SoTexture2::MODULATE;
case GL_REPLACE: return (SoTexture2::Model)(useIvExtensions ? GL_REPLACE : GL_MODULATE);
case GL_BLEND: return SoTexture2::BLEND;
case GL_DECAL: return SoTexture2::DECAL;
default: assert(0); return SoTexture2::MODULATE;
}
}
static SoTexture2::Wrap convertTextureWrap(osg::Texture::WrapMode osgWrap)
{
// notes on support of CLAMP_TO_BORDER, CLAMP_TO_EDGE, and MIRRORED_REPEAT:
// original SGI Inventor: no
// Coin: no (until current version Coin 2.5.0b3)
// TGS Inventor: introduced in TGS Inventor 5.0 (available in SoTexture class)
// note: Coin (since 2.0) uses CLAMP_TO_EDGE for rendering if SoTexture2::CLAMP is specified.
switch (osgWrap) {
case osg::Texture::CLAMP:
case osg::Texture::CLAMP_TO_BORDER:
case osg::Texture::CLAMP_TO_EDGE: return SoTexture2::CLAMP;
case osg::Texture::REPEAT:
case osg::Texture::MIRROR: return SoTexture2::REPEAT;
default: assert(0); return SoTexture2::REPEAT;
}
}
static void setSoTransform(SoTransform *tr, const osg::Vec3 &translation, const osg::Quat &rotation,
const osg::Vec3 &scale = osg::Vec3(1.,1.,1.))
{
tr->translation.setValue(translation.ptr());
tr->rotation.setValue(rotation.x(), rotation.y(), rotation.z(), rotation.w());
tr->scaleFactor.setValue(scale.ptr());
//tr->scaleCenter.setValue(osg::Vec3f(node.getPivotPoint())); <- testing required on this line
}
static bool updateMode(bool &flag, const osg::StateAttribute::GLModeValue value)
{
if (value & osg::StateAttribute::INHERIT) return flag;
else return (flag = (value & osg::StateAttribute::ON));
}
ConvertToInventor::InventorState* ConvertToInventor::createInventorState(const osg::StateSet *ss)
{
// Push on stack
const InventorState *ivPrevState = &ivStack.top();
ivStack.push(*ivPrevState);
InventorState *ivState = &ivStack.top();
// Inventor graph
ivState->ivHead = new SoSeparator;
ivPrevState->ivHead->addChild(ivState->ivHead);
if (ss) {
//
// Lighting
//
// enable/disable lighting
updateMode(ivState->osgLighting, ss->getMode(GL_LIGHTING));
if (ivState->osgLighting != ivPrevState->osgLighting) {
SoLightModel *lm = new SoLightModel;
lm->model = (ivState->osgLighting) ? SoLightModel::PHONG : SoLightModel::BASE_COLOR;
ivState->ivHead->addChild(lm);
}
// two-sided lighting
const osg::LightModel *osgLM = dynamic_cast<const osg::LightModel*>(ss->getAttribute(osg::StateAttribute::LIGHTMODEL));
if (osgLM)
ivState->osgTwoSided = osgLM->getTwoSided();
// front face
const osg::FrontFace *osgFF = dynamic_cast<const osg::FrontFace*>(ss->getAttribute(osg::StateAttribute::FRONTFACE));
if (osgFF)
ivState->osgFrontFace = osgFF->getMode();
// face culling
updateMode(ivState->osgCullFaceEnabled, ss->getMode(GL_CULL_FACE));
const osg::CullFace *osgCF = dynamic_cast<const osg::CullFace*>(ss->getAttribute(osg::StateAttribute::CULLFACE));
if (osgCF)
ivState->osgCullFace = osgCF->getMode();
// detect state change
if (ivState->osgTwoSided != ivPrevState->osgTwoSided ||
ivState->osgFrontFace != ivPrevState->osgFrontFace ||
ivState->osgCullFaceEnabled != ivPrevState->osgCullFaceEnabled ||
ivState->osgCullFace != ivPrevState->osgCullFace) {
// new SoShapeHints
SoShapeHints *sh = new SoShapeHints;
if (ivState->osgTwoSided) {
// warn if face culling is on
if (ivState->osgCullFaceEnabled)
osg::notify(osg::WARN) << "IvWriter: Using face culling and two-sided lighting together! "
"Ignoring face culling." << std::endl;
// set two-sided lighting and backface culling off
sh->vertexOrdering = ivState->osgFrontFace==osg::FrontFace::COUNTER_CLOCKWISE ?
SoShapeHints::COUNTERCLOCKWISE : SoShapeHints::CLOCKWISE;
sh->shapeType = SoShapeHints::UNKNOWN_SHAPE_TYPE;
}
else {
// set one-sided lighting and backface optionally
if (ivState->osgCullFaceEnabled) {
// determine vertex ordering
bool ccw = ivState->osgFrontFace==osg::FrontFace::COUNTER_CLOCKWISE;
if (ivState->osgCullFace != osg::CullFace::BACK) ccw = !ccw;
if (ccw)
// Warn if culling the lit faces while rendering unlit faces.
// Inventor does not support this setup and it lits the unculled faces only.
osg::notify(osg::WARN) << "IvWriter: Culling was set in a way that one-sided lighting will lit the culled sides of faces. "
"Using lighting on correct faces." << std::endl;
// face culling on
sh->vertexOrdering = ccw ? SoShapeHints::COUNTERCLOCKWISE : SoShapeHints::CLOCKWISE;
sh->shapeType = SoShapeHints::SOLID;
}
else
// no face culling
sh->shapeType = SoShapeHints::UNKNOWN_SHAPE_TYPE;
}
ivState->ivHead->addChild(sh);
}
//
// Texturing
//
// FIXME: handle 1D and 3D textures
// get OSG state
ivState->osgTexture = dynamic_cast<const osg::Texture*>(ss->getTextureAttribute(0, osg::StateAttribute::TEXTURE));
ivState->osgTexEnv = dynamic_cast<const osg::TexEnv*>(ss->getTextureAttribute(0, osg::StateAttribute::TEXENV));
updateMode(ivState->osgTexture2Enabled, ss->getTextureMode(0, GL_TEXTURE_2D));
// detect state changes
if (ivState->osgTexture2Enabled != ivPrevState->osgTexture2Enabled ||
ivState->osgTexture != ivPrevState->osgTexture ||
ivState->osgTexEnv != ivPrevState->osgTexEnv) {
if (!ivState->osgTexture2Enabled ||
ivState->osgTexture==NULL || ivState->osgTexture->getImage(0)==NULL)
// empty texture disables texturing
ivState->ivTexture = new SoTexture2;
else {
// reuse texture if possible
ivState->ivTexture = ivTexturesMap[ivState->osgTexture][ivState->osgTexEnv];
// if nothing for reusing, create new
if (!ivState->ivTexture) {
// create texture
ivState->ivTexture = new SoTexture2;
ivTexturesMap[ivState->osgTexture][ivState->osgTexEnv] = ivState->ivTexture;
// texture file name
const std::string &textureName = ivState->osgTexture->getImage(0)->getFileName();
ivState->ivTexture->filename.setValue(textureName.c_str()); // FIXME: handle inlined texture data in the files
// wrap
ivState->ivTexture->wrapS.setValue(convertTextureWrap(
ivState->osgTexture->getWrap(osg::Texture::WRAP_S)));
ivState->ivTexture->wrapT.setValue(convertTextureWrap(
ivState->osgTexture->getWrap(osg::Texture::WRAP_T)));
// texture environment
if (ivState->osgTexEnv) {
ivState->ivTexture->model.setValue(convertTexEnvMode(
ivState->osgTexEnv->getMode(), useIvExtensions));
osg::Vec4 color = ivState->osgTexEnv->getColor();
ivState->ivTexture->blendColor.setValue(color.r(), color.g(), color.b());
}
// notes on support of borderColor and borderWidth:
// original SGI Inventor: no
// Coin: no (until current version 2.5.0b3)
// TGS Inventor: introduced in version 5.0 (as SoTexture::borderColor)
// FIXME: implement support for texture filtering
}
}
}
// Texture coordinate generation
updateMode(ivState->osgTexGenS, ss->getTextureMode(0, GL_TEXTURE_GEN_S));
updateMode(ivState->osgTexGenT, ss->getTextureMode(0, GL_TEXTURE_GEN_T));
ivState->osgTexGen = dynamic_cast<const osg::TexGen*>(ss->getTextureAttribute(0, osg::StateAttribute::TEXGEN));
// Material parameters
const osg::Material *osgMaterial = dynamic_cast<const osg::Material*>(ss->getAttribute(osg::StateAttribute::MATERIAL));
if (osgMaterial)
ivState->osgMaterial = osgMaterial;
if (ivState->osgMaterial != ivPrevState->osgMaterial) {
ivState->ivMaterial = new SoMaterial;
assert(ivState->osgMaterial);
// Warn if using two side materials
// FIXME: The geometry can be probably doubled, or some estimation can be made
// whether only front or back faces are used.
if (ivState->osgMaterial->getAmbientFrontAndBack() == false ||
ivState->osgMaterial->getDiffuseFrontAndBack() == false ||
ivState->osgMaterial->getSpecularFrontAndBack() == false ||
ivState->osgMaterial->getEmissionFrontAndBack() == false ||
ivState->osgMaterial->getShininessFrontAndBack() == false)
osg::notify(osg::WARN) << "IvWriter: Model contains different materials for front and "
"back faces. This is not handled properly. Using front material only." << std::endl;
// Convert colors
// OSG represents colors by: Vec3, Vec4,Vec4ub
// Inventor by: uint32 (RGBA, by SoPackedColor), SbColor (Vec3f, by SoMaterial and SoBaseColor)
// note: Inventor can use DIFFUSE component inside a shape only. Material is set for whole shape.
// Although SoMaterial is used only, SoPackedColor may bring some possibilities on per-vertex
// alpha and SoBaseColor may be useful on pre-lit scene.
if (ivState->osgMaterial->getColorMode() != osg::Material::DIFFUSE &&
ivState->osgMaterial->getColorMode() != osg::Material::OFF) {
if (ivState->osgMaterial->getColorMode() == osg::Material::AMBIENT_AND_DIFFUSE)
osg::notify(osg::WARN) << "IvWriter: The model is using AMBIENT_AND_DIFFUSE material "
"mode while Inventor supports DIFFUSE mode only. "
"The model colors may not much exactly." << std::endl;
else
osg::notify(osg::WARN) << "IvWriter: The model is not using DIFFUSE material mode and "
"Inventor supports DIFFUSE mode only. "
"The model colors may not be correct." << std::endl;
}
// Convert material components
// FIXME: Transparency can be specified for each component in OSG
// and just globally in Inventor.
// Solutions? It can be averaged or just diffuse can be used.
((SoMaterial*)ivState->ivMaterial)->ambientColor.setValue(osgMaterial->getAmbient(
osgMaterial->getAmbientFrontAndBack() ? osg::Material::FRONT_AND_BACK : osg::Material::FRONT).ptr());
((SoMaterial*)ivState->ivMaterial)->diffuseColor.setValue(osgMaterial->getDiffuse(
osgMaterial->getDiffuseFrontAndBack() ? osg::Material::FRONT_AND_BACK : osg::Material::FRONT).ptr());
((SoMaterial*)ivState->ivMaterial)->specularColor.setValue(osgMaterial->getSpecular(
osgMaterial->getSpecularFrontAndBack() ? osg::Material::FRONT_AND_BACK : osg::Material::FRONT).ptr());
((SoMaterial*)ivState->ivMaterial)->emissiveColor.setValue(osgMaterial->getEmission(
osgMaterial->getEmissionFrontAndBack() ? osg::Material::FRONT_AND_BACK : osg::Material::FRONT).ptr());
((SoMaterial*)ivState->ivMaterial)->shininess.setValue(osgMaterial->getShininess(
osgMaterial->getShininessFrontAndBack() ? osg::Material::FRONT_AND_BACK : osg::Material::FRONT));
((SoMaterial*)ivState->ivMaterial)->transparency.setValue(1.f - osgMaterial->getDiffuse(
osgMaterial->getDiffuseFrontAndBack() ? osg::Material::FRONT_AND_BACK : osg::Material::FRONT).a());
}
// note on "headlight":
// OSG is using HEADLIGHT or SKY_LIGHT. In both cases it sets these defaults:
// osg::LightModel::ambientIntensity(0.1, 0.1, 0.1, 1.0);
// osg::Light::num(0)
// osg::Light::ambient(0,0,0,1)
// osg::Light::diffuse(0.8,0.8,0.8, 1)
// osg::Light::specular(1,1,1,1)
//
// Inventor uses different settings:
// SoEnvironment::ambientIntensity(0.2)
// SoEnvironment::ambientColor(1,1,1)
// SoDirectionalLight::intensity(1)
// SoDirectionalLight::color(1,1,1)
//
// note on Inventor light handling:
// ambient is set to 0,0,0,1