Available in the Gaming / Industries Circle

quantum | v2 switch to V1  

Battle Royale TopDown

• Overview
• Download
• Technical Info
• Highlights
  • Technical
  • Gameplay
  • Controls
  • Grenade Launcher
  • Death Zone
• 3rd Party Assets

Overview

This sample is provided with full source code and demonstrates how Quantum can be used to create a top-down battle royale game for 32 players.

It showcases the basic features of a battle royale game, such as death zone behavior, inventory, etc.

Back To Top
 

Download

Back To Top
 

Technical Info

• Unity: 2020.3.37f1;
• Platforms: PC (Windows / Mac), and Mobile (Android);

Back To Top
 

Highlights

Technical

• TopDown Character Controller.
• Raycast projectiles based on delta-movement.
• Respown Points with Entity Prototypes.

Back To Top
 

Gameplay

• Granade Launcher.
• Custom gravity for 2.5D physics.
• Rocket launcher with Animation Curve acceleration.
• Drop weapon system.
• Battle Royale Death zone.
• Players combat messages.
• UI indicator for the safe zone direction.
• Heal powerup;
• Mobile-ready UI controls.

Back To Top
 

Controls

Use W A S and D to move, Q, E or Mouse Scroll to change weapons. Stand close to an item until for a few seconds to collect it.

Back To Top
 

Grenade Launcher

When fired, the launcher instantiates a grenade that behaves as a bouncing physics object capable of overpass low enough obstacles. To achiev this behaviour in a 2D physics-based game, a custom gravity was emulated in combination with a 2.5D Transform.

public override void Update(Frame f, ref Filter filter)
    {
      EntityRef entity = filter.Entity;
      CustomGravity* customGravity = filter.customGravity;
      Transform2DVertical* transformVertical = filter.TransformVertical;
      PhysicsCollider2D* collider = filter.Collider;

      if (customGravity->VerticalSpeed <= 0)
      {
        var distance = transformVertical->Height + FPMath.Abs(customGravity->VerticalSpeed * f.DeltaTime);
        if (transformVertical->Position <= distance - (collider->Shape.Circle.Radius))
        {
          if (customGravity->VerticalSpeed > _bounceThreshold)
          {
            transformVertical->Position = _groundHeight;
            customGravity->Grounded = true;
          }
          else
          {
            customGravity->VerticalSpeed = -customGravity->VerticalSpeed / (1 + _restitution);
          }
        }
        else
        {
          customGravity->Grounded = false;
        }
      }
      else
      {
        customGravity->Grounded = false;
      }
      if (customGravity->Grounded == false)
      {
        transformVertical->Position += (customGravity->VerticalSpeed) * f.DeltaTime;
        customGravity->VerticalSpeed += _gravityForce * f.DeltaTime;
      }
    }

Back To Top
 

Death Zone

The Death Zone functions like a typical danger zone in a Battle Royale game and has two states: Waiting - where there are no changes in size, but players outside the safe zone will suffer damage, and Zone Shrinking - where the safe zone gradually reduces in size until it reaches a predetermined target size and randomly assigned position.

DeathZoneConfig config = frame.FindAsset<DeathZoneConfig>(Config.Id);
      FP elapsed = config.Timers[Iteration] - ChangeStateDelay;
      FP t = FPMath.Clamp01(elapsed / config.Timers[Iteration]);

      CurrentRadius = FPMath.Lerp(config.Radius[Iteration], TargetRadius, t);
      CurrentCenter = FPVector2.Lerp(InitialIterationCenter, TargetCenter, t);

Back To Top
 

3rd Party Assets

The Projectiles Sample includes several assets provided courtesy of their respective creators. The full packages can be acquired for your own projects at their respective site:

• Cartoon FX Remaster Free by Jean Moreno
• Toon Shooter Game Kit by Quaternius

IMPORTANT: To use them in a commercial project, it is required to purchase a license from the respective creators.

To Document Top