trpage_nodes.cpp

来自「最新osg包」· C++ 代码 · 共 944 行 · 第 1/2 页

/* ************************
   Copyright Terrain Experts Inc.
   Terrain Experts Inc (TERREX) reserves all rights to this source code
   unless otherwise specified in writing by the President of TERREX.
   This copyright may be updated in the future, in which case that version
   supercedes this one.
   -------------------
   Terrex Experts Inc.
   4400 East Broadway #314
   Tucson, AZ  85711
   [e-mail]
   Tel: [phone]
   ************************
   */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

/* trpage_nodes.cpp
   The methods for all the hierarchy nodes (e.g. groups, transforms, etc...)
   is here.
   You should only need to modify this if you want to add something to one
   of these classes.
*/

#include <trpage_geom.h>
#include <trpage_read.h>

/* Write Group
   Basic group.
*/

// Constructor
trpgGroup::trpgGroup()
{
    name = 0;
    Reset();

}
trpgGroup::~trpgGroup()
{
    Reset();
}

// Reset
void trpgGroup::Reset()
{
    numChild = 0;
    id = -1;
    if ( name ) {
	delete [] name;
	name = 0;
    }
}

// Set functions
void trpgGroup::SetNumChild(int no)
{
    numChild = no;
}
int trpgGroup::AddChild()
{
    numChild++;
    return numChild-1;
}
void trpgGroup::SetID(int inID)
{
    id = inID;
}

void trpgGroup::SetName(const char* newname )
{
    if ( name )
    {
	delete [] name;
	name = 0;
    }
    if (newname)
    {
	if ( strlen(newname) )
	{
	    name = new char[strlen(newname)+1];
	    strcpy(name,newname);
	}
    }
}

// Get methods
const char* trpgGroup::GetName(void) const
{
    return name;
}

bool trpgGroup::GetNumChild(int &n) const
{
    if (!isValid())  return false;
    n = numChild;
    return true;
}
bool trpgGroup::GetID(int &inID) const
{
    if (!isValid()) return false;
    inID = id;
    return true;
}

// Validity check
bool trpgGroup::isValid() const
{
    if (numChild <= 0)  return false;
    if (id < 0)  return false;

    return true;
}

// Write group
bool trpgGroup::Write(trpgWriteBuffer &buf)
{
    if (!isValid())
	return false;

    buf.Begin(TRPG_GROUP);
    buf.Add(numChild);
    buf.Add(id);

    if ( name && strlen(name) ) {
	buf.Add(name);
    }

    buf.End();

    return true;
}

// Read group
bool trpgGroup::Read(trpgReadBuffer &buf)
{
    try {
	buf.Get(numChild);
	if (numChild < 0) throw 1;
	buf.Get(id);
	if (id < 0) throw 1;
	if ( !buf.isEmpty() ) {
	    char nm[1024] = {0};
	    buf.Get(nm,1024);
	    SetName(nm);
	}

    }
    catch (...) {
	return false;
    }

    return isValid();
}

/* Write Billboard
   Represents rotational billboarded geometry.
*/

// Constructor
trpgBillboard::trpgBillboard()
{
    name = 0;
    Reset();
}
trpgBillboard::~trpgBillboard()
{
    Reset();
}

// Reset function
void trpgBillboard::Reset()
{
    id = -1;
    mode = Axial;
    type = Group;
    axis = trpg3dPoint(0,0,1);
    center = trpg3dPoint(0,0,0);
    numChild = 0;
    if ( name )
    {
	delete [] name;
	name = 0;
    }
}

// Set functions
void trpgBillboard::SetCenter(const trpg3dPoint &pt)
{
    center = pt;
    valid = true;
}
void trpgBillboard::SetMode(int m)
{
    mode = m;
}
void trpgBillboard::SetAxis(const trpg3dPoint &pt)
{
    axis = pt;
}
void trpgBillboard::SetType(int t)
{
    type = t;
}

// Get methods
bool trpgBillboard::GetCenter(trpg3dPoint &pt) const
{
    if (!isValid()) return false;
    pt = center;
    return true;
}
bool trpgBillboard::GetMode(int &m) const
{
    if (!isValid()) return false;
    m = mode;
    return true;
}
bool trpgBillboard::GetAxis(trpg3dPoint &pt) const
{
    if (!isValid()) return false;
    pt = axis;
    return true;
}
bool trpgBillboard::GetType(int &t) const
{
    if (!isValid()) return false;
    t = type;
    return true;
}

// Write billboard
bool trpgBillboard::Write(trpgWriteBuffer &buf)
{
    if (!isValid())
	return false;

    buf.Begin(TRPG_BILLBOARD);
    buf.Add(numChild);
    buf.Add(id);
    buf.Add((uint8)type);
    buf.Add((uint8)mode);
    buf.Add(center);
    buf.Add(axis);

    if ( name && strlen(name) ) {
	buf.Add(name);
    }
    buf.End();

    return true;
}

// Read billboard
bool trpgBillboard::Read(trpgReadBuffer &buf)
{
    uint8 uChar;

    try {
	buf.Get(numChild);
	buf.Get(id);
	buf.Get(uChar);  type = uChar;
	buf.Get(uChar);  mode = uChar;
	buf.Get(center);
	buf.Get(axis);
	if ( !buf.isEmpty() ) {
	    char nm[1024] = {0};
	    buf.Get(nm,1024);
	    SetName(nm);
	}
    }
    catch (...) {
	return false;
    }

    return isValid();
}

/* Write Level of Detail
   Represents LOD information.
*/

// Constructor
trpgLod::trpgLod()
{
    name = 0;
    Reset();
}
trpgLod::~trpgLod()
{
    Reset();
}

// Reset function
void trpgLod::Reset()
{
    id = -1;
    numRange = 0;
    center = trpg3dPoint(0,0,0);
    switchIn = switchOut = width = 0;
    rangeIndex = -1;
    valid = true;
    if ( name ) {
	delete [] name;
	name = 0;
    }
}

// Set functions
void trpgLod::SetCenter(const trpg3dPoint &pt)
{
    center = pt;
    valid = true;
}
void trpgLod::SetNumChild(int no)
{
    if (no < 0)
	return;

    numRange = no;
}
void trpgLod::SetLOD(double in,double out,double wid)
{
    switchIn = in;
    switchOut = out;
    width = wid;
}
void trpgLod::SetID(int inID)
{
    id = inID;
}

void trpgLod::SetName(const char* newname )
{
    if ( name ) {
	delete [] name;
	name = 0;
    }
    if (newname) {
	if ( strlen(newname) ) {
	    name = new char[strlen(newname)+1];
	    strcpy(name,newname);
	}
    }
}

void trpgLod::SetRangeIndex(int ri)
{
    rangeIndex = ri;
}

// Get methods
const char* trpgLod::GetName(void) const
{
    return name;
}

// Get functions
bool trpgLod::GetCenter(trpg3dPoint &pt) const
{
    if (!isValid()) return false;
    pt = center;
    return true;
}
bool trpgLod::GetNumChild(int &n) const
{
    if (!isValid()) return false;
    n = numRange;
    return true;
}
bool trpgLod::GetLOD(double &in,double &out,double &wid) const
{
    if (!isValid()) return false;
    in = switchIn;
    out = switchOut;
    wid = width;
    return true;
}
bool trpgLod::GetID(int &outID) const
{
    if (!isValid()) return false;
    outID = id;
    return true;
}
bool trpgLod::GetRangeIndex(int &ri) const
{
    if (!isValid()) return false;

    ri = rangeIndex;

    return true;
}

// Write out LOD
bool trpgLod::Write(trpgWriteBuffer &buf)
{
    if (!isValid())
	return false;

    buf.Begin(TRPG_LOD);
    buf.Add(id);
    buf.Add(numRange);
    buf.Add(center);
    buf.Add(switchIn);
    buf.Add(switchOut);
    buf.Add(width);

    if ( name && strlen(name) ) {
	buf.Add(name);
    } else
	buf.Add("");


    buf.End();

    return true;
}

// Read in LOD
bool trpgLod::Read(trpgReadBuffer &buf)
{
    try {
	buf.Get(id);
	buf.Get(numRange);
	if (numRange < 0) throw 1;
	buf.Get(center);
	buf.Get(switchIn);
	buf.Get(switchOut);
	buf.Get(width);
	if ( !buf.isEmpty() ) {
	    char nm[1024] = {0};
	    buf.Get(nm,1024);
	    if (*nm)
		SetName(nm);
	    // Look for a range index
	    if (!buf.isEmpty())
		buf.Get(rangeIndex);
	}
    }
    catch (...) {
	return false;
    }

    return isValid();
}

/* Write Layer
   A layer is just a group with a different opcode.
*/

// Constructor
trpgLayer::trpgLayer()
{
    name = 0;
}

trpgLayer::~trpgLayer()
{
    Reset();
}

// Write it
bool trpgLayer::Write(trpgWriteBuffer &buf)
{
    if (!isValid())
	return false;

    buf.Begin(TRPG_LAYER);
    buf.Add(numChild);
    buf.Add(id);