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BGE Physics

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Clamp objects min/max velocity.
Accessed with bullet physics from the advanced button with dynamic and rigid body objects.
- useful for preventing unstable physics in cases where objects move too fast.
- can add linear velocity with the motion actuator to give smooth motion transitions, without moving too fast.
- minimum velocity means objects don't stop moving.
- python scripts can adjust these values speedup or throttle velocity in the existing direction.

Also made copy properties from an object with no properties work (in case you want to clear all props)
This commit is contained in:
Campbell Barton
2009-04-14 12:34:39 +00:00
parent 1bc31fc7f9
commit 3511f8ef9f
15 changed files with 176 additions and 20 deletions
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49
source/gameengine/Ketsji/KX_GameObject.cpp
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@@ -1086,6 +1086,8 @@ PyAttributeDef KX_GameObject::Attributes[] = {
KX_PYATTRIBUTE_RO_FUNCTION("name", KX_GameObject, pyattr_get_name),
KX_PYATTRIBUTE_RO_FUNCTION("parent", KX_GameObject, pyattr_get_parent),
KX_PYATTRIBUTE_RW_FUNCTION("mass", KX_GameObject, pyattr_get_mass, pyattr_set_mass),
KX_PYATTRIBUTE_RW_FUNCTION("linVelocityMin", KX_GameObject, pyattr_get_lin_vel_min, pyattr_set_lin_vel_min),
KX_PYATTRIBUTE_RW_FUNCTION("linVelocityMax", KX_GameObject, pyattr_get_lin_vel_max, pyattr_set_lin_vel_max),
KX_PYATTRIBUTE_RW_FUNCTION("visible", KX_GameObject, pyattr_get_visible, pyattr_set_visible),
KX_PYATTRIBUTE_BOOL_RW ("occlusion", KX_GameObject, m_bOccluder),
KX_PYATTRIBUTE_RW_FUNCTION("position", KX_GameObject, pyattr_get_position, pyattr_set_position),
@@ -1364,6 +1366,53 @@ int KX_GameObject::pyattr_set_mass(void *self_v, const KX_PYATTRIBUTE_DEF *attrd
return 0;
}
PyObject* KX_GameObject::pyattr_get_lin_vel_min(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef)
{
KX_GameObject* self= static_cast<KX_GameObject*>(self_v);
KX_IPhysicsController *spc = self->GetPhysicsController();
return PyFloat_FromDouble(spc ? spc->GetLinVelocityMax() : 0.0f);
}
int KX_GameObject::pyattr_set_lin_vel_min(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef, PyObject *value)
{
KX_GameObject* self= static_cast<KX_GameObject*>(self_v);
KX_IPhysicsController *spc = self->GetPhysicsController();
MT_Scalar val = PyFloat_AsDouble(value);
if (val < 0.0f) { /* also accounts for non float */
PyErr_SetString(PyExc_AttributeError, "expected a float zero or above");
return 1;
}
if (spc)
spc->SetLinVelocityMin(val);
return 0;
}
PyObject* KX_GameObject::pyattr_get_lin_vel_max(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef)
{
KX_GameObject* self= static_cast<KX_GameObject*>(self_v);
KX_IPhysicsController *spc = self->GetPhysicsController();
return PyFloat_FromDouble(spc ? spc->GetLinVelocityMax() : 0.0f);
}
int KX_GameObject::pyattr_set_lin_vel_max(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef, PyObject *value)
{
KX_GameObject* self= static_cast<KX_GameObject*>(self_v);
KX_IPhysicsController *spc = self->GetPhysicsController();
MT_Scalar val = PyFloat_AsDouble(value);
if (val < 0.0f) { /* also accounts for non float */
PyErr_SetString(PyExc_AttributeError, "expected a float zero or above");
return 1;
}
if (spc)
spc->SetLinVelocityMax(val);
return 0;
}
PyObject* KX_GameObject::pyattr_get_visible(void *self_v, const KX_PYATTRIBUTE_DEF *attrdef)
{
KX_GameObject* self= static_cast<KX_GameObject*>(self_v);