void
vsModelInstanceLodGroup::CalculateMatrixBounds( vsBox3D& out )
{
out.Clear();
for ( int i = 0; i < m_matrix.ItemCount(); i++ )
out.ExpandToInclude( m_matrix[i].w );
}
// find the bounds of our matrix translations.
void
vsModelInstanceGroup::CalculateMatrixBounds( vsBox3D& out )
{
vsBox3D a;
out.Clear();
for ( int i = 0; i < m_lod.ItemCount(); i++ )
{
m_lod[i]->CalculateMatrixBounds(a);
out.ExpandToInclude(a);
}
}
void
vsDisplayList::GetBoundingBox( vsBox3D &box )
{
box = vsBox3D();
if ( m_instanceParent )
{
return m_instanceParent->GetBoundingBox(box);
}
else
{
vsMatrix4x4 transformStack[20];
transformStack[0] = vsMatrix4x4::Identity;
int transformStackLevel = 0;
vsVector3D *currentVertexArray = NULL;
//int currentVertexArraySize = 0;
Rewind();
op *o = PopOp();
while(o)
{
if ( o->type == OpCode_PushMatrix4x4 )
{
transformStack[transformStackLevel+1] = transformStack[transformStackLevel] * o->data.matrix4x4;
transformStackLevel++;
}
if ( o->type == OpCode_SetMatrix4x4 )
{
transformStack[++transformStackLevel] = o->data.matrix4x4;
}
else if ( o->type == OpCode_SetMatrices4x4 )
{
vsMatrix4x4 *mat = (vsMatrix4x4*)o->data.p;
transformStack[++transformStackLevel] = *mat;
}
else if ( o->type == OpCode_PopTransform )
{
transformStackLevel--;
}
else if ( o->type == OpCode_VertexArray )
{
vsVector3D pos;
int count = o->data.GetUInt();
float *shuttle = (float *) o->data.p;
currentVertexArray = (vsVector3D *)shuttle;
//currentVertexArraySize = count*3;
for ( int i = 0; i < count; i++ )
{
pos.Set(shuttle[0],shuttle[1],shuttle[2]);
pos = transformStack[transformStackLevel].ApplyTo( pos );
box.ExpandToInclude( pos );
shuttle += 3;
}
}
else if ( o->type == OpCode_VertexBuffer )
{
vsVector3D pos;
vsRenderBuffer *buffer = (vsRenderBuffer *)o->data.p;
currentVertexArray = buffer->GetVector3DArray();
//currentVertexArraySize = buffer->GetVector3DArraySize();
for ( int i = 0; i < buffer->GetVector3DArraySize(); i++ )
{
pos = buffer->GetVector3DArray()[i];
pos = transformStack[transformStackLevel].ApplyTo( pos );
box.ExpandToInclude( pos );
}
}
else if ( o->type == OpCode_BindBuffer )
{
vsVector3D pos;
vsRenderBuffer *buffer = (vsRenderBuffer *)o->data.p;
int positionCount = buffer->GetPositionCount();
for ( int i = 0; i < positionCount; i++ )
{
pos = buffer->GetPosition(i);
pos = transformStack[transformStackLevel].ApplyTo( pos );
box.ExpandToInclude( pos );
}
}
else if ( o->type == OpCode_LineListBuffer || o->type == OpCode_LineStripBuffer )
{
vsRenderBuffer *buffer = (vsRenderBuffer *)o->data.p;
uint16_t *shuttle = buffer->GetIntArray();
for ( int i = 0; i < buffer->GetIntArraySize(); i++ )
{
uint16_t index = shuttle[i];
box.ExpandToInclude( transformStack[transformStackLevel].ApplyTo( currentVertexArray[index] ) );
}
}
else if ( o->type == OpCode_LineStripArray )
{
uint16_t *shuttle = (uint16_t *)o->data.p;
int count = o->data.GetUInt();
for ( int i = 0; i < count; i++ )
{
uint16_t index = shuttle[i];
box.ExpandToInclude( transformStack[transformStackLevel].ApplyTo( currentVertexArray[index] ) );
}
}
o = PopOp();
}
}
}
