static struct cpShapeMassInfo
cpCircleShapeMassInfo(cpFloat mass, cpFloat radius, cpVect center)
{
struct cpShapeMassInfo info = {
mass, cpMomentForCircle(1.0f, 0.0f, radius, cpvzero),
center,
cpAreaForCircle(0.0f, radius),
};
return info;
}
SUPPRESS_EMPTY_FILE_WARNING
#if USE_CHIPMUNK
//================================================================//
// local
//================================================================//
//----------------------------------------------------------------//
/** @name areaForCircle
@text Returns the area for a ring or circle.
@overload
@in number radius
@out number area
@overload
@in number innerRadius
@in number outerRadius
@out number area
*/
int MOAICpShape::_areaForCircle ( lua_State* L ) {
USLuaState state ( L );
if ( !state.CheckParams ( 1, "N" )) return 0;
cpFloat r1;
cpFloat r2;
if ( state.GetTop () >= 2 ) {
r1 = state.GetValue < cpFloat >( 1, 0 );
r2 = state.GetValue < cpFloat >( 2, 0 );
}
else {
r1 = 0;
r2 = state.GetValue < cpFloat >( 1, 0 );
}
lua_pushnumber ( L, cpAreaForCircle ( r1, r2 ));
return 1;
}
/** @name areaForCircle
@text Returns the area for a ring or circle.
@overload
@in number radius
@out number area
@overload
@in number innerRadius
@in number outerRadius
@out number area
*/
int MOAICpShape::_areaForCircle ( lua_State* L ) {
MOAILuaState state ( L );
if ( !state.CheckParams ( 1, "N" )) return 0;
cpFloat r1;
cpFloat r2;
if ( state.GetTop () >= 2 ) {
r1 = state.GetValue < cpFloat >( 1, 0 );
r2 = state.GetValue < cpFloat >( 2, 0 );
}
else {
r1 = 0;
r2 = state.GetValue < cpFloat >( 1, 0 );
}
lua_pushnumber ( L, cpAreaForCircle ( r1, r2 ));
return 1;
}
float PhysicsShapeCircle::calculateArea()
{
return PhysicsHelper::cpfloat2float(cpAreaForCircle(0, cpCircleShapeGetRadius(_cpShapes.front())));
}
float PhysicsShapeCircle::calculateArea(float radius)
{
return PhysicsHelper::cpfloat2float(cpAreaForCircle(0, radius));
}
CP_NAMESPACE_BEGIN
cpFloat Area::ForCircle( cpFloat r1, cpFloat r2 ) {
return cpAreaForCircle( r1, r2 );
}
static VALUE
rb_cpAreaForCircle(VALUE self, VALUE r1, VALUE r2) {
cpFloat i = cpAreaForCircle(NUM2DBL(r1), NUM2DBL(r2));
return rb_float_new(i);
}