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/*===========================================================================
Copyright (C) 2000 Radical Entertainment Ltd. All rights reserved.
Component: RoadSegment
Description:
Authors: Travis Brown-John
Revisions Date Author Revision
2002/02/25 Tbrown-John Created
===========================================================================*/
#include <memory/classsizetracker.h>
#include <roads/roadsegmentdata.h>
// System.
//
#include <raddebug.hpp>
/*
Input parameters:
O----------> v0
| |
| |
| |
| |
v v
v2 v1
O = ( 0.0f, 0.0f, 0.0f ) LCS origin.
# of lanes.
create this:
|
N1 \ /
v0_________________________v1----> facing
| |
-> N0 | --> direction | -> N2
|_________________________|
v3 v2
N3 / \
|
N is UP
N0 is ->
N1 is |
\ /
N2 is ->
N3 is / \
|
*/
RoadSegmentData::RoadSegmentData() :
mnLanes( 0 )
{
CLASSTRACKER_CREATE( RoadSegmentData );
unsigned int i;
for ( i = 0; i < 4; ++i )
{
mCorners[i].Set(0.0f, 0.0f, 0.0f);
mEdgeNormals[i].Set(0.0f, 0.0f, 0.0f);
}
mNormal.Set(0.0f, 0.0f, 0.0f);
}
RoadSegmentData::RoadSegmentData(
const rmt::Vector& v0,
const rmt::Vector& v1,
const rmt::Vector& v2,
unsigned int nLanes )
{
CLASSTRACKER_CREATE( RoadSegmentData );
SetData( v0, v1, v2, nLanes );
}
RoadSegmentData::~RoadSegmentData()
{
CLASSTRACKER_DESTROY( RoadSegmentData );
}
//=============================================================================
// RoadSegmentData::SetData
//=============================================================================
// Description: Comment
//
// Parameters: ( const rmt::Vector& v0, const rmt::Vector& v1, const rmt::Vector& v2, unsigned int nLanes, bool hasShoulder )
//
// Return: void
//
//=============================================================================
void RoadSegmentData::SetData( const rmt::Vector& v0,
const rmt::Vector& v1,
const rmt::Vector& v2,
unsigned int nLanes )
{
mnLanes = nLanes;
// Calculate the up vector for this piece.
//
mNormal.CrossProduct( v0, v2 );
mNormal.Normalize( );
rmt::Vector origin( 0.0f, 0.0f, 0.0f );
mCorners[ 0 ] = origin;
mCorners[ 1 ] = v0;
mCorners[ 2 ] = v1;
mCorners[ 3 ] = v2;
rmt::Vector temp;
// Calculate the edge normals.
temp.Sub( mCorners[ 0 ], mCorners[ 3 ] );
mEdgeNormals[ 0 ].CrossProduct( mNormal, temp );
mEdgeNormals[ 0 ].Normalize( );
temp.Sub( mCorners[ 1 ], mCorners[ 0 ] );
mEdgeNormals[ 1 ].CrossProduct( mNormal, temp );
mEdgeNormals[ 1 ].Normalize( );
temp.Sub( mCorners[ 1 ], mCorners[ 2 ] );
mEdgeNormals[ 2 ].CrossProduct( mNormal, temp );
mEdgeNormals[ 2 ].Normalize( );
temp.Sub( mCorners[ 3 ], mCorners[ 2 ] );
mEdgeNormals[ 3 ].CrossProduct( mNormal, temp );
mEdgeNormals[ 3 ].Normalize( );
}
/*
==============================================================================
RoadSegmentData::GetCorner
==============================================================================
Description: Comment
Parameters: ( int index ), which box corner are we interested in.
Return: const rmt::Vector& - a copy of the vertex location in local space.
=============================================================================
*/
const rmt::Vector& RoadSegmentData::GetCorner( int index ) const
{
rAssert( index < 4 );
return mCorners[ index ];
}
/*
==============================================================================
RoadSegmentData::GetEdgeNormal
==============================================================================
Description: Return the normal to the edge. Define CW, starting
with leading edge. v4.Sub( v0 ) = leading edge.
Parameters: ( int index )
Return: const
=============================================================================
*/
const rmt::Vector& RoadSegmentData::GetEdgeNormal( int index ) const
{
rAssert( index < 4 );
return mEdgeNormals[ index ];
}
/*
==============================================================================
RoadSegmentData::GetSegmentNormal
==============================================================================
Description: Return the normal to the planar segment surface.
Parameters: ( void )
Return: const rmt::Vector&
=============================================================================
*/
const rmt::Vector& RoadSegmentData::GetSegmentNormal( void ) const
{
return mNormal;
}
/*
==============================================================================
RoadSegmentData::GetNumLanes
==============================================================================
Description: Return the number of lanes, on the left side if bIsLeft is true.
Else, the number of lanes on the right side.
Parameters: ( void )
Return: unsigned int, the number of lanes.
=============================================================================
*/
unsigned int RoadSegmentData::GetNumLanes( void ) const
{
return mnLanes;
}
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