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-rw-r--r--src/entities/Physical.cpp55
-rw-r--r--src/entities/Physical.h9
2 files changed, 54 insertions, 10 deletions
diff --git a/src/entities/Physical.cpp b/src/entities/Physical.cpp
index b7ca1904..600e5dca 100644
--- a/src/entities/Physical.cpp
+++ b/src/entities/Physical.cpp
@@ -304,6 +304,22 @@ CPhysical::RemoveRefsToEntity(CEntity *ent)
}
}
+void
+CPhysical::PlacePhysicalRelativeToOtherPhysical(CPhysical *other, CPhysical *phys, CVector localPos)
+{
+ CVector worldPos = other->GetMatrix() * localPos;
+ float step = 0.9f * CTimer::GetTimeStep();
+ CVector pos = other->m_vecMoveSpeed*step + worldPos;
+
+ CWorld::Remove(phys);
+ phys->GetMatrix() = other->GetMatrix();
+ phys->GetPosition() = pos;
+ phys->m_vecMoveSpeed = other->m_vecMoveSpeed;
+ phys->GetMatrix().UpdateRW();
+ phys->UpdateRwFrame();
+ CWorld::Add(phys);
+}
+
int32
CPhysical::ProcessEntityCollision(CEntity *ent, CColPoint *colpoints)
{
@@ -434,15 +450,38 @@ CPhysical::ApplyFrictionTurnForce(float jx, float jy, float jz, float px, float
m_vecTurnFriction += turnimpulse*(1.0f/m_fTurnMass);
}
-void
-CPhysical::ApplySpringCollision(float f1, CVector &v, CVector &p, float f2, float f3)
+bool
+CPhysical::ApplySpringCollision(float springConst, CVector &springDir, CVector &point, float springRatio, float bias)
{
- if(1.0f - f2 <= 0.0f)
- return;
+ float compression = 1.0f - springRatio;
+ if(compression > 0.0f){
+ float step = min(CTimer::GetTimeStep(), 3.0f);
+ float impulse = -0.008f*m_fMass*step * springConst * compression * bias*2.0f;
+ ApplyMoveForce(springDir*impulse);
+ ApplyTurnForce(springDir*impulse, point);
+ }
+ return true;
+}
+
+// What exactly is speed?
+bool
+CPhysical::ApplySpringDampening(float damping, CVector &springDir, CVector &point, CVector &speed)
+{
+ float speedA = DotProduct(speed, springDir);
+ float speedB = DotProduct(GetSpeed(point), springDir);
float step = min(CTimer::GetTimeStep(), 3.0f);
- float strength = -0.008f*m_fMass*2.0f*step * f1 * (1.0f-f2) * f3;
- ApplyMoveForce(v*strength);
- ApplyTurnForce(v*strength, p);
+ float impulse = -damping * (speedA + speedB)/2.0f * m_fMass * step * 0.53f;
+
+ // what is this?
+ float a = m_fTurnMass / ((point.MagnitudeSqr() + 1.0f) * 2.0f * m_fMass);
+ a = min(a, 1.0f);
+ float b = fabs(impulse / (speedB * m_fMass));
+ if(a < b)
+ impulse *= a/b;
+
+ ApplyMoveForce(springDir*impulse);
+ ApplyTurnForce(springDir*impulse, point);
+ return true;
}
void
@@ -1909,6 +1948,7 @@ STARTPATCHES
InjectHook(0x4970C0, &CPhysical::AddCollisionRecord_Treadable, PATCH_JUMP);
InjectHook(0x497240, &CPhysical::GetHasCollidedWith, PATCH_JUMP);
InjectHook(0x49F820, &CPhysical::RemoveRefsToEntity, PATCH_JUMP);
+ InjectHook(0x49F890, &CPhysical::PlacePhysicalRelativeToOtherPhysical, PATCH_JUMP);
#define F3 float, float, float
InjectHook(0x495B10, &CPhysical::ApplyMoveSpeed, PATCH_JUMP);
@@ -1918,6 +1958,7 @@ STARTPATCHES
InjectHook(0x495D90, (void (CPhysical::*)(F3))&CPhysical::ApplyFrictionMoveForce, PATCH_JUMP);
InjectHook(0x495E10, (void (CPhysical::*)(F3, F3))&CPhysical::ApplyFrictionTurnForce, PATCH_JUMP);
InjectHook(0x499890, &CPhysical::ApplySpringCollision, PATCH_JUMP);
+ InjectHook(0x499990, &CPhysical::ApplySpringDampening, PATCH_JUMP);
InjectHook(0x495B50, &CPhysical::ApplyGravity, PATCH_JUMP);
InjectHook(0x495B80, (void (CPhysical::*)(void))&CPhysical::ApplyFriction, PATCH_JUMP);
InjectHook(0x495C20, &CPhysical::ApplyAirResistance, PATCH_JUMP);
diff --git a/src/entities/Physical.h b/src/entities/Physical.h
index 0104268a..81d3d649 100644
--- a/src/entities/Physical.h
+++ b/src/entities/Physical.h
@@ -81,6 +81,7 @@ public:
void AddCollisionRecord_Treadable(CEntity *ent);
bool GetHasCollidedWith(CEntity *ent);
void RemoveRefsToEntity(CEntity *ent);
+ static void PlacePhysicalRelativeToOtherPhysical(CPhysical *other, CPhysical *phys, CVector localPos);
float GetDistanceSq(void) { return m_vecMoveSpeed.MagnitudeSqr() * sq(CTimer::GetTimeStep()); }
// get speed of point p relative to entity center
@@ -104,8 +105,8 @@ public:
bIsInSafePosition = false;
}
- const CVector& GetMoveSpeed() { return m_vecMoveSpeed; }
- const CVector& GetTurnSpeed() { return m_vecTurnSpeed; }
+ const CVector &GetMoveSpeed() { return m_vecMoveSpeed; }
+ const CVector &GetTurnSpeed() { return m_vecTurnSpeed; }
void ApplyMoveSpeed(void);
void ApplyTurnSpeed(void);
@@ -120,7 +121,9 @@ public:
void ApplyFrictionMoveForce(const CVector &j) { ApplyFrictionMoveForce(j.x, j.y, j.z); }
void ApplyFrictionTurnForce(float jx, float jy, float jz, float rx, float ry, float rz);
void ApplyFrictionTurnForce(const CVector &j, const CVector &p) { ApplyFrictionTurnForce(j.x, j.y, j.z, p.x, p.y, p.z); }
- void ApplySpringCollision(float f1, CVector &v, CVector &p, float f2, float f3);
+ // springRatio: 1.0 fully extended, 0.0 fully compressed
+ bool ApplySpringCollision(float springConst, CVector &springDir, CVector &point, float springRatio, float bias);
+ bool ApplySpringDampening(float damping, CVector &springDir, CVector &point, CVector &speed);
void ApplyGravity(void);
void ApplyFriction(void);
void ApplyAirResistance(void);