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/* $Id: Raytrace.cpp,v 1.3 2003/03/19 09:25:06 zongo Exp $
**
** Ark - Libraries, Tools & Programs for MMORPG developpements.
** Copyright (C) 1999-2000 The Contributors of the Ark Project
** Please see the file "AUTHORS" for a list of contributors
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** 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
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <Ark/ArkModelState.h>
#include <Modules/Collision/Collision.h>
namespace Ark
{
extern void CD_GetTriangle (uint triangleindex,
Vector3 *points,
int *mat,
CDSubmodel *mdl);
bool
CDRaytrace::RayTest (const Opcode::AABBQuantizedNoLeafNode *node)
{
if (!RayTest (&node->mAABB))
return false;
if (node->HasLeaf())
{
CD_GetTriangle (node->GetPrimitive(),
m_Triangle, &m_Material, m_SubMdl);
if (m_Ray.HitTriangle (m_Triangle[0],
m_Triangle[1],
m_Triangle[2],
&m_Pos))
return true;
}
else if (RayTest(node->GetPos()))
return true;
if (node->HasLeaf2())
{
CD_GetTriangle (node->GetPrimitive2(),
m_Triangle, &m_Material, m_SubMdl);
if (m_Ray.HitTriangle (m_Triangle[0],
m_Triangle[1],
m_Triangle[2],
&m_Pos))
return true;
}
else if (RayTest(node->GetNeg()))
return true;
return false;
}
bool
CDRaytrace::RayTest (const Opcode::QuantizedAABB *ab)
{
Vector3 Pa(float(ab->mCenter[0]),
float(ab->mCenter[1]),
float(ab->mCenter[2]));
Vector3 ea(float(ab->mExtents[0]),
float(ab->mExtents[1]),
float(ab->mExtents[2]));
Pa.Scale (m_CenterCoeff);
ea.Scale (m_ExtentCoeff);
/// Create bounding box...
BBox bb;
bb.m_Min = Pa;
bb.m_Max = Pa;
bb.m_Min -= ea;
bb.m_Max += ea;
return m_Ray.HitBBox (bb, &Pa);
}
bool
CDRaytrace::RayTest (Opcode::AABBQuantizedNoLeafTree *tree,
CDSubmodel *submdl)
{
m_SubMdl = submdl;
m_CenterCoeff = *((Vector3*) &tree->mCenterCoeff);
m_ExtentCoeff = *((Vector3*) &tree->mExtentsCoeff);
return RayTest (tree->GetNodes());
}
bool
CDRaytrace::RayTest (const ModelState &ms,
const Ray &ray,
Collision &collision)
{
Model *mdl = const_cast<ModelState&>(ms).GetModel();
if (mdl == NULL)
return false;
CDModel *cdmdl = static_cast<CDModel*>(mdl->m_CDModel);
if (cdmdl == NULL)
return false;
Matrix44 imatrix = ms.m_Matrix;
imatrix.Invert();
// To avoid transforming the bounding boxes, we simply transform
// the ray by the invert of the matrix...
// (ie Collision in object space)
Vector3 from = imatrix.Transform(ray.m_From);
Vector3 to = imatrix.Transform(ray.m_To);
m_Ray = Ray (from, to);
bool col = false;
for (size_t i = 0; i < cdmdl->m_SubModels.size(); i++)
{
if (RayTest ((Opcode::AABBQuantizedNoLeafTree*)
cdmdl->m_SubModels[i]->m_CDModel->GetTree(),
cdmdl->m_SubModels[i]))
{
col = true;
break;
}
}
if (!col)
return false;
// Transform back from object space to world space...
m_Pos = ms.m_Matrix.Transform (m_Pos);
m_Triangle[0] = ms.m_Matrix.Transform (m_Triangle[0]);
m_Triangle[1] = ms.m_Matrix.Transform (m_Triangle[1]);
m_Triangle[2] = ms.m_Matrix.Transform (m_Triangle[2]);
// Fill collision structure.
collision.m_Pos = m_Pos;
collision.m_Flags = Collision::ENTITY
| Collision::POSITION
| Collision::PLANE;
collision.m_Plane = Plane::GetTriPlane (m_Triangle[0],
m_Triangle[1],
m_Triangle[2]);
collision.m_Material =
const_cast<ModelState&>(ms).m_Skin->GetMaterial(m_Material);
return true;
}
}
|
