AnotherFoxGuy/bounce
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use gravity

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This commit is contained in:
Irlan
2018-04-08 00:13:29 -03:00
parent 63bc6c8674
commit 5342361a5d
2 changed files with 6 additions and 6 deletions
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8
include/bounce/dynamics/cloth/spring_cloth.h
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@ -65,7 +65,7 @@ struct b3SpringClothDef
// Mass radius // Mass radius
float32 r; float32 r;
// Force due to gravity // Acceleration due to gravity (m/s^2)
b3Vec3 gravity; b3Vec3 gravity;
}; };
@ -136,11 +136,11 @@ public:
// Return the cloth mesh used to initialize this cloth. // Return the cloth mesh used to initialize this cloth.
b3Mesh* GetMesh() const; b3Mesh* GetMesh() const;
// Set the gravitational force applied to this cloth. // Set the gravitational acceleration applied to this cloth.
// This force is applied at each time step. // Units are m/s^2.
void SetGravity(const b3Vec3& gravity); void SetGravity(const b3Vec3& gravity);
// Return the gravitational force applied to this cloth. // Return the gravitational acceleration applied to this cloth.
const b3Vec3& GetGravity() const; const b3Vec3& GetGravity() const;
// Set the type of a given point mass. // Set the type of a given point mass.

4
src/bounce/dynamics/cloth/spring_cloth.cpp
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@ -485,12 +485,12 @@ void b3SpringCloth::Step(float32 dt)
// Update contacts // Update contacts
UpdateContacts(); UpdateContacts();
// Apply gravity // Apply gravity forces
for (u32 i = 0; i < m_massCount; ++i) for (u32 i = 0; i < m_massCount; ++i)
{ {
if (m_types[i] == b3MassType::e_dynamicMass) if (m_types[i] == b3MassType::e_dynamicMass)
{ {
m_f[i] += m_gravity; m_f[i] += m_m[i] * m_gravity;
} }
} }