✨ Add tuning variables for elasticity #3136

src/game/collision.cpp

@@ -144,7 +144,7 @@ bool CCollision::TestBox(vec2 Pos, vec2 Size, int Flag) const
 	return false;
 }
 
-void CCollision::MoveBox(vec2 *pInoutPos, vec2 *pInoutVel, vec2 Size, float Elasticity, bool *pDeath) const
+void CCollision::MoveBox(vec2 *pInoutPos, vec2 *pInoutVel, vec2 Size, vec2 Elasticity, bool *pDeath, bool* pGrounded) const
 {
 	// do the move
 	vec2 Pos = *pInoutPos;
@@ -159,6 +159,9 @@ void CCollision::MoveBox(vec2 *pInoutPos, vec2 *pInoutVel, vec2 Size, float Elas
 	if(Distance > 0.00001f)
 	{
 		const float Fraction = 1.0f/(Max+1);
+		float ElasticityX = clamp(Elasticity.x, -1.0f, 1.0f);
+		float ElasticityY = clamp(Elasticity.y, -1.0f, 1.0f);
+
 		for(int i = 0; i <= Max; i++)
 		{
 			vec2 NewPos = Pos + Vel*Fraction; // TODO: this row is not nice
@@ -176,26 +179,30 @@ void CCollision::MoveBox(vec2 *pInoutPos, vec2 *pInoutVel, vec2 Size, float Elas
 
 				if(TestBox(vec2(Pos.x, NewPos.y), Size))
 				{
+					if(pGrounded && ElasticityY > 0 && Vel.y > 0)
+						*pGrounded = true;
 					NewPos.y = Pos.y;
-					Vel.y *= -Elasticity;
+					Vel.y *= -ElasticityY;
 					Hits++;
 				}
 
 				if(TestBox(vec2(NewPos.x, Pos.y), Size))
 				{
 					NewPos.x = Pos.x;
-					Vel.x *= -Elasticity;
+					Vel.x *= -ElasticityX;
 					Hits++;
 				}
 
 				// neither of the tests got a collision.
 				// this is a real _corner case_!
 				if(Hits == 0)
 				{
+					if(pGrounded && ElasticityY > 0 && Vel.y > 0)
+						*pGrounded = true;
 					NewPos.y = Pos.y;
-					Vel.y *= -Elasticity;
+					Vel.y *= -ElasticityY;
 					NewPos.x = Pos.x;
-					Vel.x *= -Elasticity;
+					Vel.x *= -ElasticityX;
 				}
 			}
 

src/game/collision.h

@@ -32,7 +32,7 @@ class CCollision
 	int GetHeight() const { return m_Height; }
 	int IntersectLine(vec2 Pos0, vec2 Pos1, vec2 *pOutCollision, vec2 *pOutBeforeCollision) const;
 	void MovePoint(vec2 *pInoutPos, vec2 *pInoutVel, float Elasticity, int *pBounces) const;
-	void MoveBox(vec2 *pInoutPos, vec2 *pInoutVel, vec2 Size, float Elasticity, bool *pDeath=0) const;
+	void MoveBox(vec2 *pInoutPos, vec2 *pInoutVel, vec2 Size, vec2 Elasticity, bool *pDeath=0, bool* pGrounded=0) const;
 	bool TestBox(vec2 Pos, vec2 Size, int Flag=COLFLAG_SOLID) const;
 };
 

src/game/gamecore.cpp

@@ -375,7 +375,10 @@ void CCharacterCore::Move()
 	m_Vel.x = m_Vel.x*RampValue;
 
 	vec2 NewPos = m_Pos;
-	m_pCollision->MoveBox(&NewPos, &m_Vel, vec2(PHYS_SIZE, PHYS_SIZE), 0, &m_Death);
+	bool Grounded = false;
+	m_pCollision->MoveBox(&NewPos, &m_Vel, vec2(PHYS_SIZE, PHYS_SIZE), vec2(m_pWorld->m_Tuning.m_PlayerElasticityX, m_pWorld->m_Tuning.m_PlayerElasticityY), &m_Death, &Grounded);
+	if(Grounded)
+		m_Jumped &= ~2;
 
 	m_Vel.x = m_Vel.x*(1.0f/RampValue);
 

src/game/server/entities/character.cpp

@@ -149,7 +149,7 @@ void CCharacter::HandleNinja()
 		// Set velocity
 		m_Core.m_Vel = m_Ninja.m_ActivationDir * g_pData->m_Weapons.m_Ninja.m_Velocity;
 		vec2 OldPos = m_Pos;
-		GameServer()->Collision()->MoveBox(&m_Core.m_Pos, &m_Core.m_Vel, vec2(GetProximityRadius(), GetProximityRadius()), 0.f);
+		GameServer()->Collision()->MoveBox(&m_Core.m_Pos, &m_Core.m_Vel, vec2(GetProximityRadius(), GetProximityRadius()), vec2(GameServer()->Tuning()->m_PlayerElasticityX, GameServer()->Tuning()->m_PlayerElasticityY));
 
 		// reset velocity so the client doesn't predict stuff
 		m_Core.m_Vel = vec2(0.f, 0.f);

src/game/server/entities/flag.cpp

@@ -68,7 +68,7 @@ void CFlag::TickDefered()
 			else
 			{
 				m_Vel.y += GameWorld()->m_Core.m_Tuning.m_Gravity;
-				GameServer()->Collision()->MoveBox(&m_Pos, &m_Vel, vec2(ms_PhysSize, ms_PhysSize), 0.5f);
+				GameServer()->Collision()->MoveBox(&m_Pos, &m_Vel, vec2(ms_PhysSize, ms_PhysSize), vec2(GameWorld()->m_Core.m_Tuning.m_FlagElasticity, GameWorld()->m_Core.m_Tuning.m_FlagElasticity));
 			}
 		}
 	}

src/game/tuning.h

@@ -44,4 +44,8 @@ MACRO_TUNING_PARAM(LaserBounceCost, laser_bounce_cost, 0)
 
 MACRO_TUNING_PARAM(PlayerCollision, player_collision, 1)
 MACRO_TUNING_PARAM(PlayerHooking, player_hooking, 1)
+
+MACRO_TUNING_PARAM(PlayerElasticityX, player_elasticity_x, 0.0f)
+MACRO_TUNING_PARAM(PlayerElasticityY, player_elasticity_y, 0.0f)
+MACRO_TUNING_PARAM(FlagElasticity, flag_elasticity, 0.5f)
 #endif