undeadbytes

Enemy

The Enemy class represents an enemy entity within the game. This class encapsulates the properties and behaviors of enemies, including rendering, updating, collision handling, and response to projectile hits.

Class Structure

Properties

1. type: A string representing the type of entity. In this case, it is set to ‘enemy’.
2. bounding: A string specifying the entity’s bounding behavior. It is set to ‘arc’.
3. x, y: Numeric values representing the enemy’s coordinates.
4. angle: The angle of the enemy entity.
5. position: A value representing the enemy’s position.
6. incrementer: A value used as a speed incrementer for animation.
7. speed: The enemy’s movement speed.
8. sleep: A boolean representing the enemy’s render state.
9. pushAlongVelocity: An object representing the velocity applied when an enemy is pushed by another entity.
10. projectileHitVelocity: An object representing the velocity applied when the enemy is hit by a projectile.
11. canBeHitByProjectile: A boolean indicating whether the enemy can be hit by a projectile.
12. lastVectorX, lastVectorY: Last recorded vector components used for projectile hit velocity calculation.
13. health: The enemy’s health, initialized to 100.
14. dead: A boolean indicating whether the enemy is dead.
15. allEnemiesDead: A boolean indicating whether all enemies in the game are dead.

Methods

1. Constructor(spawn): Initializes the enemy entity with spawn coordinates and sets default values for various properties.

2. render(context): Renders the enemy entity on the canvas using the Renderer class.

3. update(game): Updates the enemy entity’s position, handles enemy-enemy collisions, checks for projectile hits, and updates the entity’s health and state.

4. pushAlong(vectorX, vectorY): Sets the push velocity to push enemies when bumped by entities.

5. hitByProjectile(projectile, dps, enemies): Sets the enemy’s velocity and handles damage per second (DPS) when enemies are hit by projectiles.

Rendering and Updating

Render Method

The render method delegates the rendering responsibility to the Renderer class, ensuring a separation of concerns and maintaining a modular structure.

Update Method

The update method is responsible for updating the enemy entity’s position, handling enemy-enemy collisions, responding to projectile hits, and updating health and state. It ensures that the enemy’s state is updated based on various interactions within the game.

Interaction with Other Entities

Enemy-Enemy Collision

In the update method, there is a section that checks for enemy-enemy collisions. If the distance between two enemies is within a specified range, one enemy pushes the other, simulating a collision response.

Projectile Hit Handling

The update method also checks for projectile hits by iterating over projectiles in the game. If a projectile intersects with the enemy’s bounds, the hitByProjectile method is called, applying damage and potentially marking the enemy as dead.

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