Velocity Tutorial

From SA-MP Wiki

How to use Velocity Functions

Creating a script to Jump 10ft in a car or drive at the speed of light without hacks is easy with SetPlayerVelocity(); and OnPlayerKeyStateChange()

First, let's start off by adding the Defines and a timer.

#include <a_samp>
 
#define PRESSED(%0) \
	(((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))
 
new Tick[MAX_PLAYERS];
 
public OnPlayerUpdate(playerid)
{
	Tick[playerid]++;
	if(Tick[playerid] != 3) return 1;
	Tick[playerid] = 0;
 	new Keys,up,down;
       	GetPlayerKeys(playerid,Keys,up,down);
	new Float:x,Float:y,Float:z;
	if(Keys &= 1024)
	{
   		if(GetPlayerState(playerid) == PLAYER_STATE_ONFOOT)
		{
 
			GetPlayerVelocity(playerid,x,y,z);
			SetPlayerVelocity(playerid,x*1.2,y*1.2,z*1.2);
		}
	}
 	else if(Keys &= 4)
      	{
        	if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
		{
			GetVehicleVelocity(GetPlayerVehicleID(playerid),x,y,z);
			SetVehicleVelocity(GetPlayerVehicleID(playerid),x*1.2,y*1.2,z*1.2);
		}
	}
	return 1;
}

This next part will show you how you can use another key to make your car jump 10ft in the air.

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
	if (PRESSED(KEY_HANDBRAKE)) // Change KEY_HANDBRAKE to your choice of PlayerKeys
	{
        new Float:x, Float:y, Float:z;
	GetVehicleVelocity(GetPlayerVehicleID(playerid), x, y, z);
	SetVehicleVelocity(GetPlayerVehicleID(playerid) ,x ,y ,z+0.3);
	}
	return 1;
}

With that all added all you need to do is hold down Left Alt while in a car to use the Speedboost, players can use this on foot but cannot be touching the ground while doing so. Press you Handbrake key(mostlikely Spacebar) to jump in your car.