vp_double
Method call snippet
vp_double(instance, attr);Return the value of a floating point attribute (with double-precision)
Parameters
These are the parameters that this method requires:
| Parameter | Usage |
|---|---|
VPInstance instance |
Pointer to the instance this method call is intended for |
vp_float_attribute_t attr |
Attribute to return value of (defined in VP.h) |
Returns
The value of the attribute.
Behavior
If an invalid identifier is passed for attr, then 0 will be returned.
Caveats
There is no way to know if the call was unsuccessful, use vp_double_get() when this is required.
Examples
void handle_avatar_add(VPInstance sdk)
{
double x, z;
x = vp_double(sdk, VP_AVATAR_X);
z = vp_double(sdk, VP_AVATAR_Z);
// If an avatar appears at roughly 0X 0Z (at any height), then send a welcome message.
if (x > -0.5 && x < 0.5 && y > -0.5 && y < 0.5)
{
char msg[256];
sprintf(msg, "Welcome %s to the world!", vp_string(sdk, VP_AVATAR_NAME));
vp_say(sdk, msg);
}
}
int main(int argc, const char* argv[])
{
//...
vp_event_set(sdk, VP_EVENT_AVATAR_ADD, handle_avatar_add);
//...
}