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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* Additional copyright for this file:
* Copyright (C) 1999-2000 Revolution Software Ltd.
* This code is based on source code created by Revolution Software,
* used with permission.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef ICB_TRACER_H_INCLUDED
#define ICB_TRACER_H_INCLUDED
#include "engines/icb/game_volume.h"
#include "engines/icb/p4.h"
#include "engines/icb/p4_generic.h"
#include "engines/icb/common/px_3drealpoint.h"
#include "engines/icb/common/px_2drealline.h"
namespace ICB {
class _floor_world;
class _tracer : public _game_volume {
public:
// Definitions used by this class.
enum FaceID { NO_FACE, LEFT, RIGHT, FRONT, BACK, TOP, BOTTOM };
// Default constructor and destructor.
inline _tracer() { m_pyBarrierMemFile = NULL; m_nPadding[0] = 0; }
virtual inline ~_tracer() { ; }
// This checks a line through game-world space and returns the point of its first impact.
bool8 Trace(const px3DRealPoint &oFrom, const px3DRealPoint &oTo, eBarrierRayType eRayType, px3DRealPoint &oImpact, eBarrierLogicValue eImpactType);
// Call this before using the tracer, to point it at its barriers.
void SetBarrierPointer(LinkedDataFile *pyBarriers) { m_pyBarrierMemFile = pyBarriers; }
// Call this to give the tracer access to the floor data.
void SetFloorsPointer(_floor_world *pFloorWorld) { m_pFloorWorld = pFloorWorld; }
private:
LinkedDataFile *m_pyBarrierMemFile; // The memory image of the barrier file.
_floor_world *m_pFloorWorld; // The floors data (loaded by the routing code).
PXreal m_fXDiff, m_fYDiff, m_fZDiff; // Delta x, y and z for the line we're tracing.
PXreal m_fSqrLength; // Square length of the vector we're tracing.
bool8 m_bXPositiveGoing; // These 3 get set once for each
bool8 m_bYPositiveGoing; // call to the tracer, and indicate
bool8 m_bZPositiveGoing; // which way the line is going.
uint8 m_nPadding[1];
// Here I block the use of the default '='.
_tracer(const _tracer &t) : _game_volume(t) { ; }
void operator=(const _tracer &t) { ; }
// Private functions used only by this class.
void GetBarriersForCube(const _XYZ_index &oCubeIndices, uint32 *oThisCubesBarriers, int32 &nNumBarriers, int32 nExtraSliceIndex) const;
px3DRealPoint CalculateEntryToNextCube(const px3DRealPoint &oCurrentPoint, const px3DRealPoint &oTo, const _bullet_cube &oThisCube, FaceID &eCubeLeavingFace) const;
bool8 CheckRayHeightAgainstBarrier(const px3DRealPoint &oFrom, const px3DRealPoint &oTo, const RouteBarrier *pBarrier, px3DRealPoint &o3DImpactPoint) const;
uint32 FindClosest(const px3DRealPoint &oFrom, px3DRealPoint *oImpactList, uint32 nNumImpacts) const;
px3DRealPoint CalculateRayIntersectionWithCubeWall(const px3DRealPoint &oCurrentPoint, const px3DRealPoint &oTo, const _bullet_cube &oThisCube, FaceID eLeavingFace) const;
inline const RouteBarrier *GetBarrier(uint32 i) const;
};
inline const RouteBarrier *_tracer::GetBarrier(uint32 i) const {
RouteBarrier *pBarriers;
if (!m_pyBarrierMemFile)
Fatal_error("No barrier file in _tracer::GetBarrier()");
pBarriers = (RouteBarrier *)LinkedDataObject::Fetch_item_by_name(m_pyBarrierMemFile, "Data");
return &(pBarriers[i]);
}
extern _tracer *g_oTracer; // Object for doing the plotting of bullets and line-of-sight.
} // End of namespace ICB
#endif // #if !defined( TRACER_H_INCLUDED )
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