ModelInstance.cpp

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */
 
#include "ModelInstance.h"
#include "WorldModel.h"
#include "MapTree.h"
 
using G3D::Vector3;
using G3D::Ray;
 
namespace VMAP
{
 ModelInstance::ModelInstance(ModelSpawn const& spawn, WorldModel* model) : ModelMinimalData(spawn), iModel(model)
 {
 iInvRot = G3D::Matrix3::fromEulerAnglesZYX(G3D::pif() * spawn.iRot.y / 180.f, G3D::pif() * spawn.iRot.x / 180.f, G3D::pif() * spawn.iRot.z / 180.f).inverse();
 iInvScale = 1.f / iScale;
 }
 
 bool ModelInstance::intersectRay(G3D::Ray const& pRay, float& pMaxDist, bool pStopAtFirstHit, ModelIgnoreFlags ignoreFlags) const
 {
 if (!iModel)
 {
 //std::cout << "<object not loaded>\n";
 return false;
 }
 float time = pRay.intersectionTime(iBound);
 if (time == G3D::finf())
 {
// std::cout << "Ray does not hit '" << name << "'\n";
 
 return false;
 }
// std::cout << "Ray crosses bound of '" << name << "'\n";
/* std::cout << "ray from:" << pRay.origin().x << ", " << pRay.origin().y << ", " << pRay.origin().z
 << " dir:" << pRay.direction().x << ", " << pRay.direction().y << ", " << pRay.direction().z
 << " t/tmax:" << time << '/' << pMaxDist;
 std::cout << "\nBound lo:" << iBound.low().x << ", " << iBound.low().y << ", " << iBound.low().z << " hi: "
 << iBound.high().x << ", " << iBound.high().y << ", " << iBound.high().z << std::endl; */
 // child bounds are defined in object space:
 Vector3 p = iInvRot * (pRay.origin() - iPos) * iInvScale;
 Ray modRay(p, iInvRot * pRay.direction());
 float distance = pMaxDist * iInvScale;
 bool hit = iModel->IntersectRay(modRay, distance, pStopAtFirstHit, ignoreFlags);
 if (hit)
 {
 distance *= iScale;
 pMaxDist = distance;
 }
 return hit;
 }
 
 bool ModelInstance::GetLocationInfo(const G3D::Vector3& p, LocationInfo& info) const
 {
 if (!iModel)
 {
#ifdef VMAP_DEBUG
 std::cout << "<object not loaded>\n";
#endif
 return false;
 }
 
 // M2 files don't contain area info, only WMO files
 if (iModel->IsM2())
 return false;
 if (!iBound.contains(p))
 return false;
 // child bounds are defined in object space:
 Vector3 pModel = iInvRot * (p - iPos) * iInvScale;
 Vector3 zDirModel = iInvRot * Vector3(0.f, 0.f, -1.f);
 float zDist;
 
 GroupLocationInfo groupInfo;
 if (iModel->GetLocationInfo(pModel, zDirModel, zDist, groupInfo))
 {
 Vector3 modelGround = pModel + zDist * zDirModel;
 // Transform back to world space. Note that:
 // Mat * vec == vec * Mat.transpose()
 // and for rotation matrices: Mat.inverse() == Mat.transpose()
 float world_Z = ((modelGround * iInvRot) * iScale + iPos).z;
 if (info.ground_Z < world_Z) // hm...could it be handled automatically with zDist at intersection?
 {
 info.rootId = groupInfo.rootId;
 info.hitModel = groupInfo.hitModel;
 info.ground_Z = world_Z;
 info.hitInstance = this;
 return true;
 }
 }
 return false;
 }
 
 bool ModelInstance::GetLiquidLevel(const G3D::Vector3& p, LocationInfo& info, float& liqHeight) const
 {
 // child bounds are defined in object space:
 Vector3 pModel = iInvRot * (p - iPos) * iInvScale;
 //Vector3 zDirModel = iInvRot * Vector3(0.f, 0.f, -1.f);
 float zDist;
 if (info.hitModel->GetLiquidLevel(pModel, zDist))
 {
 // calculate world height (zDist in model coords):
 // assume WMO not tilted (wouldn't make much sense anyway)
 liqHeight = zDist * iScale + iPos.z;
 return true;
 }
 return false;
 }
 
 bool ModelSpawn::readFromFile(FILE* rf, ModelSpawn& spawn)
 {
 uint32 check = 0, nameLen;
 check += fread(&spawn.flags, sizeof(uint8), 1, rf);
 // EoF?
 if (!check)
 {
 if (ferror(rf))
 std::cout << "Error reading ModelSpawn!\n";
 return false;
 }
 check += fread(&spawn.adtId, sizeof(uint8), 1, rf);
 check += fread(&spawn.ID, sizeof(uint32), 1, rf);
 check += fread(&spawn.iPos, sizeof(float), 3, rf);
 check += fread(&spawn.iRot, sizeof(float), 3, rf);
 check += fread(&spawn.iScale, sizeof(float), 1, rf);
 bool has_bound = (spawn.flags & MOD_HAS_BOUND) != 0;
 if (has_bound) // only WMOs have bound in MPQ, only available after computation
 {
 Vector3 bLow, bHigh;
 check += fread(&bLow, sizeof(float), 3, rf);
 check += fread(&bHigh, sizeof(float), 3, rf);
 spawn.iBound = G3D::AABox(bLow, bHigh);
 }
 check += fread(&nameLen, sizeof(uint32), 1, rf);
 if (check != uint32(has_bound ? 17 : 11))
 {
 std::cout << "Error reading ModelSpawn!\n";
 return false;
 }
 char nameBuff[500];
 if (nameLen > 500) // file names should never be that long, must be file error
 {
 std::cout << "Error reading ModelSpawn, file name too long!\n";
 return false;
 }
 check = fread(nameBuff, sizeof(char), nameLen, rf);
 if (check != nameLen)
 {
 std::cout << "Error reading ModelSpawn!\n";
 return false;
 }
 spawn.name = std::string(nameBuff, nameLen);
 return true;
 }
 
 bool ModelSpawn::writeToFile(FILE* wf, ModelSpawn const& spawn)
 {
 uint32 check = 0;
 check += fwrite(&spawn.flags, sizeof(uint8), 1, wf);
 check += fwrite(&spawn.adtId, sizeof(uint8), 1, wf);
 check += fwrite(&spawn.ID, sizeof(uint32), 1, wf);
 check += fwrite(&spawn.iPos, sizeof(float), 3, wf);
 check += fwrite(&spawn.iRot, sizeof(float), 3, wf);
 check += fwrite(&spawn.iScale, sizeof(float), 1, wf);
 bool has_bound = (spawn.flags & MOD_HAS_BOUND) != 0;
 if (has_bound) // only WMOs have bound in MPQ, only available after computation
 {
 check += fwrite(&spawn.iBound.low(), sizeof(float), 3, wf);
 check += fwrite(&spawn.iBound.high(), sizeof(float), 3, wf);
 }
 uint32 nameLen = spawn.name.length();
 check += fwrite(&nameLen, sizeof(uint32), 1, wf);
 if (check != uint32(has_bound ? 17 : 11)) return false;
 check = fwrite(spawn.name.c_str(), sizeof(char), nameLen, wf);
 if (check != nameLen) return false;
 return true;
 }
 
}