RLBot Python bindings for the Rust crate rl_ball_sym

Overview

RLBot Python bindings for rl_ball_sym 0.6

Prerequisites:

Steps to build the Python bindings

  1. Download this repository
  2. Run cargo_build_release.bat
  3. A new file, called rl_ball_sym.pyd, will appear
  4. Copy rl_ball_sym.pyd to your Python project's source folder
  5. import rl_ball_sym in your Python file

Basic usage in an RLBot script to render the path prediction

See script.cfg and script.py for a pre-made script that renders the framework's ball path prediction in green and the rl_ball_sym's ball path prediction in red.

from traceback import print_exc

from rlbot.agents.base_script import BaseScript
from rlbot.utils.structures.game_data_struct import GameTickPacket

import rl_ball_sym as rlbs


class rl_ball_sym(BaseScript):
    def __init__(self):
        super().__init__("rl_ball_sym")

    def main(self):
        rlbs.load_soccar()

        while 1:
            try:
                self.packet: GameTickPacket = self.wait_game_tick_packet()
                current_location = self.packet.game_ball.physics.location
                current_velocity = self.packet.game_ball.physics.velocity
                current_angular_velocity = self.packet.game_ball.physics.angular_velocity

                rlbs.set_ball({
                    "time": self.packet.game_info.seconds_elapsed,
                    "location": [current_location.x, current_location.y, current_location.z],
                    "velocity": [current_velocity.x, current_velocity.y, current_velocity.z],
                    "angular_velocity": [current_angular_velocity.x, current_angular_velocity.y, current_angular_velocity.z],
                })

                path_prediction = rlbs.get_ball_prediction_struct()

                self.renderer.begin_rendering()
                self.renderer.draw_polyline_3d(tuple((path_prediction["slices"][i]["location"][0], path_prediction["slices"][i]["location"][1], path_prediction["slices"][i]["location"][2]) for i in range(0, path_prediction["num_slices"], 4)), self.renderer.red())
                self.renderer.end_rendering()
            except Exception:
                print_exc()


if __name__ == "__main__":
    rl_ball_sym = rl_ball_sym()
    rl_ball_sym.main()

Example ball prediction struct

Normal

[
    {
        "time": 0.008333,
        "location": [
            -2283.9,
            1683.8,
            323.4,
        ],
        "velocity": [
            1273.4,
            -39.7,
            757.6,
        ]
    },
    {
        "time": 0.025,
        "location": [
            -2262.6,
            1683.1,
            335.9,
        ],
        "velocity": [
            1272.7,
            -39.7,
            746.4,
        ]
    }
    ...
]

Full

[
    {
        "time": 0.008333,
        "location": [
            -2283.9,
            1683.8,
            323.4,
        ],
        "velocity": [
            1273.4,
            -39.7,
            757.6,
        ]
        "angular_velocity": [
            2.3,
            -0.8,
            3.8,
        }
    },
    {
        "time": 0.016666,
        "location": [
            -2273.3,
            1683.4,
            329.7,
        ],
        "velocity": [
            1273.1,
            -39.7,
            752.0,
        ],
        "angular_velocity": [
            2.3,
            -0.8,
            3.8
        ]
    }
    ...
]

__doc__

Returns the string rl_ball_sym is a Rust implementation of ball path prediction for Rocket League; Inspired by Samuel (Chip) P. Mish's C++ utils called RLUtilities

load_soccar

Loads in the field for a standard soccar game.

load_dropshot

Loads in the field for a standard dropshot game.

load_hoops

Loads in the field for a standard hoops game.

set_ball

Sets information related to the ball. Accepts a Python dictionary. You don't have to set everything - you can exclude keys at will.

time

The seconds that the game has elapsed for.

location

The ball's location, in an array in the format [x, y, z].

velocity

The ball's velocity, in an array in the format [x, y, z].

angular_velocity

The ball's angular velocity, in an array in the format [x, y, z].

radius

The ball's radius.

Defaults:

  • Soccar - 91.25
  • Dropshot - 100.45
  • Hoops - 91.25

collision_radius

The ball's collision radius.

Defaults:

  • Soccar - 93.15
  • Dropshot - 103.6
  • Hoops - 93.15

set_gravity

Sets information about game's gravity.

Accepts an array in the format [x, y, z].

step_ball

Steps the ball by 1/120 seconds into the future every time it's called.

For convience, also returns the new information about the ball.

Example:

{
    "time": 0.008333,
    "location": [
        -2283.9,
        1683.8,
        323.4,
    ],
    "velocity": [
        1273.4,
        -39.7,
        757.6,
    ]
    "angular_velocity": [
        2.3,
        -0.8,
        3.8,
    }
}

get_ball_prediction_struct

Equivalent to calling step_ball() 720 times (6 seconds).

Returns a normal-type ball prediction struct.

get_ball_prediction_struct takes 0.3ms to execute

get_ball_prediction_struct_full

Equivalent to calling step_ball() 720 times (6 seconds).

Returns a full-type ball prediction struct.

get_ball_prediction_struct_full takes 0.54ms to execute

get_ball_prediction_struct_for_time

Equivalent to calling step_ball() 120 * time times.

Returns a normal-type ball prediction struct.

time

The seconds into the future that the ball path prediction should be generated.

get_ball_prediction_struct_full_for_time

Equivalent to calling step_ball() 120 * time times.

Returns a full-type ball prediction struct.

time

The seconds into the future that the ball path prediction should be generated.

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