Import Cai1Hsu/re3 @ miami (reVC / GTA:VC decompilation)HEADmiami

Snapshot import (no upstream history) into git.ancap.in.ua/claude, per @lzcnt.
Source: https://github.com/Cai1Hsu/re3 branch miami.

1 files changed, 324 insertions, 0 deletions

diff --git a/src/vehicles/Floater.cpp b/src/vehicles/Floater.cpp
new file mode 100644
index 0000000..08688a3
--- /dev/null
+++ b/src/vehicles/Floater.cpp
@@ -0,0 +1,324 @@
+#include "common.h"
+
+#include "Timer.h"
+#include "WaterLevel.h"
+#include "ModelIndices.h"
+#include "Physical.h"
+#include "Vehicle.h"
+#include "Floater.h"
+
+cBuoyancy mod_Buoyancy;
+
+float fVolMultiplier = 1.0f;
+// amount of boat volume in bounding box
+// 1.0-volume is the empty space in the bbox
+float fBoatVolumeDistribution[9] = {
+	// rear
+	0.75f, 0.9f, 0.75f,
+	0.95f, 1.0f, 0.95f,
+	0.4f, 0.7f, 0.4f
+	// bow
+};
+float fBoatVolumeDistributionCat[9] = {
+	0.9f, 0.3f, 0.9f,
+	1.0f, 0.5f, 1.0f,
+	0.95f, 0.4f, 0.95f
+};
+float fBoatVolumeDistributionSail[9] = {
+	0.55f, 0.95f, 0.55f,
+	0.75f, 1.1f, 0.75f,
+	0.3f, 0.8f, 0.3f
+};
+float fBoatVolumeDistributionDinghy[9] = {
+	0.65f, 0.85f, 0.65f,
+	0.85f, 1.1f, 0.85f,
+	0.65f, 0.95f, 0.65f
+};
+float fBoatVolumeDistributionSpeed[9] = {
+	0.7f, 0.9f, 0.7f,
+	0.95f, 1.0f, 0.95f,
+	0.6f, 0.7f, 0.6f
+};
+
+bool
+cBuoyancy::ProcessBuoyancy(CPhysical *phys, float buoyancy, CVector *point, CVector *impulse)
+{
+	m_numSteps = 2.0f;
+
+	if(!CWaterLevel::GetWaterLevel(phys->GetPosition(), &m_waterlevel, phys->bTouchingWater))
+		return false;
+	m_matrix = phys->GetMatrix();
+
+	PreCalcSetup(phys, buoyancy);
+	SimpleCalcBuoyancy();
+	float f = CalcBuoyancyForce(phys, point, impulse);
+	if(m_isBoat)
+		return true;
+	return f != 0.0f;
+}
+
+bool
+cBuoyancy::ProcessBuoyancyBoat(CVehicle *veh, float buoyancy, CVector *point, CVector *impulse, bool bNoTurnForce)
+{
+	m_numSteps = 2.0f;
+
+	if(!CWaterLevel::GetWaterLevel(veh->GetPosition(), &m_waterlevel, veh->bTouchingWater))
+		return false;
+	m_matrix = veh->GetMatrix();
+	PreCalcSetup(veh, buoyancy);
+
+
+	float x, y;
+	int ix, i;
+	tWaterLevel waterPosition;
+	CVector waterNormal;
+
+	// Floater is divided into 3x3 parts. Process and sum each of them
+	float volDiv = 1.0f/((m_dimMax.z - m_dimMin.z)*sq(m_numSteps+1.0f));
+	ix = 0;
+	for(x = m_dimMin.x; x <= m_dimMax.x; x += m_step.x){
+		i = ix;
+		for(y = m_dimMin.y; y <= m_dimMax.y; y += m_step.y){
+			CVector waterLevel(x, y, 0.0f);
+			FindWaterLevelNorm(m_positionZ, &waterLevel, &waterPosition, &waterNormal);
+			switch(veh->GetModelIndex()){
+			case MI_RIO:
+				fVolMultiplier = fBoatVolumeDistributionCat[i];
+				break;
+			case MI_SQUALO:
+			case MI_SPEEDER:
+			case MI_JETMAX:
+				fVolMultiplier = fBoatVolumeDistributionSpeed[i];
+				break;
+			case MI_COASTG:
+			case MI_DINGHY:
+				fVolMultiplier = fBoatVolumeDistributionDinghy[i];
+				break;
+			case MI_MARQUIS:
+				fVolMultiplier = fBoatVolumeDistributionSail[i];
+				break;
+			case MI_PREDATOR:
+			case MI_SKIMMER:
+			case MI_REEFER:
+			case MI_TROPIC:
+			default:
+				fVolMultiplier = fBoatVolumeDistribution[i];
+				break;
+			}
+			if(waterPosition != FLOATER_ABOVE_WATER){
+				float volume = SimpleSumBuoyancyData(waterLevel, waterPosition);
+				float upImpulse = volume * volDiv * buoyancy * CTimer::GetTimeStep();
+				CVector speed = veh->GetSpeed(Multiply3x3(veh->GetMatrix(), CVector(x, y, 0.0f)));
+				float damp = 1.0f - DotProduct(speed, waterNormal)*veh->pHandling->fSuspensionDampingLevel;
+				float finalImpulse = upImpulse*Max(damp, 0.0f);
+				impulse->z += finalImpulse;
+				if(!bNoTurnForce)
+					veh->ApplyTurnForce(finalImpulse*waterNormal, Multiply3x3(m_matrix, waterLevel));
+			}
+			i += 3;
+		}
+		ix++;
+	}
+
+	m_volumeUnderWater *= volDiv;
+
+	*point = Multiply3x3(m_matrix, m_impulsePoint);
+	return m_isBoat || m_haveVolume;
+
+}
+
+void
+cBuoyancy::PreCalcSetup(CPhysical *phys, float buoyancy)
+{
+	CColModel *colModel;
+
+	m_isBoat = phys->IsVehicle() && ((CVehicle*)phys)->IsBoat();
+	colModel = phys->GetColModel();
+	m_dimMin = colModel->boundingBox.min;
+	m_dimMax = colModel->boundingBox.max;
+
+	if(m_isBoat){
+		switch(phys->GetModelIndex()){
+		case MI_PREDATOR:
+		default:
+			m_dimMax.y *= 1.05f;
+			m_dimMin.y *= 0.9f;
+			break;
+		case MI_SPEEDER:
+			m_dimMax.y *= 1.25f;
+			m_dimMin.y *= 0.83f;
+			break;
+		case MI_REEFER:
+			m_dimMin.y *= 0.9f;
+			break;
+		case MI_RIO:
+			m_dimMax.y *= 0.9f;
+			m_dimMin.y *= 0.9f;
+			m_dimMax.z += 0.25f;
+			m_dimMin.z -= 0.2f;
+			break;
+		case MI_SQUALO:
+			m_dimMax.y *= 0.9f;
+			m_dimMin.y *= 0.9f;
+			break;
+		case MI_TROPIC:
+			m_dimMax.y *= 1.3f;
+			m_dimMin.y *= 0.82f;
+			m_dimMin.z -= 0.2f;
+			break;
+		case MI_SKIMMER:
+			m_dimMin.y = -m_dimMax.y;
+			m_dimMax.y *= 1.2f;
+			break;
+		case MI_COASTG:
+			m_dimMax.y *= 1.1f;
+			m_dimMin.y *= 0.9f;
+			m_dimMin.z -= 0.3f;
+			break;
+		case MI_DINGHY:
+			m_dimMax.y *= 1.3f;
+			m_dimMin.y *= 0.9f;
+			m_dimMin.z -= 0.2f;
+			break;
+		case MI_MARQUIS:
+			m_dimMax.y *= 1.3f;
+			m_dimMin.y *= 0.9f;
+			break;
+		case MI_JETMAX:
+			m_dimMin.y *= 0.9f;
+			break;
+		}
+	}
+
+	m_step = (m_dimMax - m_dimMin)/m_numSteps;
+
+	if(m_step.z > m_step.x && m_step.z > m_step.y){
+		m_stepRatio.x = m_step.x/m_step.z;
+		m_stepRatio.y = m_step.y/m_step.z;
+		m_stepRatio.z = 1.0f;
+	}else if(m_step.y > m_step.x && m_step.y > m_step.z){
+		m_stepRatio.x = m_step.x/m_step.y;
+		m_stepRatio.y = 1.0f;
+		m_stepRatio.z = m_step.z/m_step.y;
+	}else{
+		m_stepRatio.x = 1.0f;
+		m_stepRatio.y = m_step.y/m_step.x;
+		m_stepRatio.z = m_step.z/m_step.x;
+	}
+
+	m_haveVolume = false;
+	m_numPartialVolumes = 1.0f;
+	m_volumeUnderWater = 0.0f;
+	m_impulsePoint = CVector(0.0f, 0.0f, 0.0f);
+	m_position = phys->GetPosition();
+	m_positionZ = CVector(0.0f, 0.0f, m_position.z);
+	m_buoyancy = buoyancy;
+	m_waterlevel += m_waterLevelInc;
+}
+
+void
+cBuoyancy::SimpleCalcBuoyancy(void)
+{
+	float x, y;
+	tWaterLevel waterPosition;
+
+	// Floater is divided into 3x3 parts. Process and sum each of them
+	for(x = m_dimMin.x; x <= m_dimMax.x; x += m_step.x){
+		for(y = m_dimMin.y; y <= m_dimMax.y; y += m_step.y){
+			CVector waterLevel(x, y, 0.0f);
+			FindWaterLevel(m_positionZ, &waterLevel, &waterPosition);
+			fVolMultiplier = 1.0f;
+			if(waterPosition != FLOATER_ABOVE_WATER)
+				SimpleSumBuoyancyData(waterLevel, waterPosition);
+		}
+	}
+
+	m_volumeUnderWater /= (m_dimMax.z - m_dimMin.z)*sq(m_numSteps+1.0f);
+}
+
+float
+cBuoyancy::SimpleSumBuoyancyData(CVector &waterLevel, tWaterLevel waterPosition)
+{
+	static float fThisVolume;
+	static CVector AverageOfWaterLevel;
+	static float fFraction;
+	static float fRemainingSlice;
+
+	float submerged = Abs(waterLevel.z - m_dimMin.z);
+	// subtract empty space from submerged volume
+	fThisVolume = submerged - (1.0f - fVolMultiplier);
+	if(fThisVolume < 0.0f)
+		return 0.0f;
+
+	if(m_isBoat){
+		fThisVolume *= fVolMultiplier;
+		fThisVolume = sq(fThisVolume);
+	}
+
+	m_volumeUnderWater += fThisVolume;
+
+	AverageOfWaterLevel.x = waterLevel.x * m_stepRatio.x;
+	AverageOfWaterLevel.y = waterLevel.y * m_stepRatio.y;
+	AverageOfWaterLevel.z = (waterLevel.z+m_dimMin.z)/2.0f * m_stepRatio.z;
+
+	if(m_flipAverage)
+		AverageOfWaterLevel = -AverageOfWaterLevel;
+
+	fFraction = 1.0f/m_numPartialVolumes;
+	fRemainingSlice = 1.0f - fFraction;
+	m_impulsePoint = m_impulsePoint*fRemainingSlice + AverageOfWaterLevel*fThisVolume*fFraction;
+	m_numPartialVolumes += 1.0f;
+	m_haveVolume = true;
+	return fThisVolume;
+}
+
+void
+cBuoyancy::FindWaterLevel(const CVector &zpos, CVector *waterLevel, tWaterLevel *waterPosition)
+{
+	*waterPosition = FLOATER_IN_WATER;
+	// waterLevel is a local x,y point
+	// m_position is the global position of our floater
+	// zpos is the global z coordinate of our floater
+	CVector xWaterLevel = Multiply3x3(m_matrix, *waterLevel);
+	CWaterLevel::GetWaterLevel(xWaterLevel.x + m_position.x, xWaterLevel.y + m_position.y, m_position.z,
+		&waterLevel->z, true);
+	waterLevel->z -= xWaterLevel.z + zpos.z;	// make local
+	if(waterLevel->z > m_dimMax.z){
+		waterLevel->z = m_dimMax.z;
+		*waterPosition = FLOATER_UNDER_WATER;
+	}else if(waterLevel->z < m_dimMin.z){
+		waterLevel->z = m_dimMin.z;
+		*waterPosition = FLOATER_ABOVE_WATER;
+	}
+}
+
+// Same as above but also get normal
+void
+cBuoyancy::FindWaterLevelNorm(const CVector &zpos, CVector *waterLevel, tWaterLevel *waterPosition, CVector *normal)
+{
+	*waterPosition = FLOATER_IN_WATER;
+	CVector xWaterLevel = Multiply3x3(m_matrix, *waterLevel);
+	CWaterLevel::GetWaterLevel(xWaterLevel.x + m_position.x, xWaterLevel.y + m_position.y, m_position.z,
+		&waterLevel->z, true);
+	waterLevel->z -= xWaterLevel.z + zpos.z;	// make local
+	if(waterLevel->z >= m_dimMin.z)
+		*normal = CWaterLevel::GetWaterNormal(xWaterLevel.x + m_position.x, xWaterLevel.y + m_position.y);
+	if(waterLevel->z > m_dimMax.z){
+		waterLevel->z = m_dimMax.z;
+		*waterPosition = FLOATER_UNDER_WATER;
+	}else if(waterLevel->z < m_dimMin.z){
+		waterLevel->z = m_dimMin.z;
+		*waterPosition = FLOATER_ABOVE_WATER;
+	}
+}
+
+bool
+cBuoyancy::CalcBuoyancyForce(CPhysical *phys, CVector *point, CVector *impulse)
+{
+	if(!m_haveVolume)
+		return false;
+
+	*point = Multiply3x3(m_matrix, m_impulsePoint);
+	*impulse = CVector(0.0f, 0.0f, m_volumeUnderWater*m_buoyancy*CTimer::GetTimeStep());
+	return true;
+}