public void LoadContent(ContentManager content, byte numberOfFrames, Vector2 screenBounds)
{
//load texture for the player and solid color texture(1x1 pixels) for health and shield display
spriteSheet = content.Load <Texture2D>("player/player");
solidColor = content.Load <Texture2D>("solidColor");
shieldTex = content.Load <Texture2D>("player/playerShield");
viewport = screenBounds;
//set up collision mask, whos width and height is the size of each frame
frameWidth = (byte)(spriteSheet.Width / numberOfFrames); //spritesheets must be 1 frame tall
collisionMask = ModifyTexture2D.Crop(spriteSheet, new Rectangle(0, 0, frameWidth, spriteSheet.Height));
}
/// <summary>
/// Creates a new enemy that falls vertically down the screen
/// </summary>
/// <param name="xStart">starting position of the new enemy</param>
/// <param name="yStart">starting position of the new enemy</param>
/// <param name="numberOfFrames">number of frames in the spritesheet</param>
/// <param name="textureToLoad">asset name of the enemy's texture</param>
/// <param name="difficultyFactor"></param>
public Enemy(int xStart, int yStart, int numberOfFrames, string textureToLoad, float difficultyFactor)
{
location.X = xStart;
location.Y = yStart;
spriteSheet = content.Load <Texture2D>(textureToLoad); //object may not exist when LoadContent is called from game class
//set up collision mask, whos width and height is the size of each frame
frameWidth = (byte)(spriteSheet.Width / numberOfFrames); //spritesheets must be 1 frame tall
collisionMask = ModifyTexture2D.Crop(spriteSheet, new Rectangle(0, 0, frameWidth, spriteSheet.Height));
//set stats to default values
health = (10 * difficultyFactor); //modify health by difficulty
offscreenAllowance = 2000;
frameLength = 85;
//set rotation to default (zero) and origin to centre of enemy. spriteEffects assigned to default (none).
rotation = 0f;
origin = new Vector2(collisionMask.Width / 2.0f, collisionMask.Height / 2.0f);
spriteEffects = SpriteEffects.None;
numberOfParticles = 5;
}