private DrawParameters SetDrawParametersForFacedDirection(ISpriteLibrary spriteLibrary)
{
DrawParameters drawParameters = default;
switch (this._player.CurrentDirectionFaced)
{
case Direction.Left:
drawParameters.Texture = spriteLibrary.GetSprite("Sprites/Player/PlayerLeftFacing");
drawParameters.Effects = SpriteEffects.None;
break;
case Direction.Right:
drawParameters.Texture = spriteLibrary.GetSprite("Sprites/Player/PlayerLeftFacing");
drawParameters.Effects = SpriteEffects.FlipHorizontally;
break;
case Direction.Up:
drawParameters.Texture = spriteLibrary.GetSprite("Sprites/Player/PlayerUpFacing");
drawParameters.Effects = SpriteEffects.None;
break;
case Direction.Down:
drawParameters.Texture = spriteLibrary.GetSprite("Sprites/Player/PlayerDownFacing");
drawParameters.Effects = SpriteEffects.None;
break;
default:
throw new InvalidOperationException();
}
drawParameters.Position = this._player.Position;
return(drawParameters);
}
public void Draw(ISpriteBatch spriteBatch, ISpriteLibrary spriteLibrary)
{
if (!this._gameObject.IsExtant)
{
return;
}
this._time %= this._lengthOfAnimation;
var positionInAnimation = this._time / this._lengthOfAnimation;
DrawParameters drawParameters = default;
drawParameters.Texture = spriteLibrary.GetSprite(this._textureName);
var frameCount = (drawParameters.Texture.Width / Constants.TileLength);
int frameIndex = (int)Math.Floor(frameCount * positionInAnimation);
// Calculate the source rectangle of the current frame.
drawParameters.AreaWithinTexture = new Rectangle(frameIndex * Constants.TileLength, 0, Constants.TileLength, Constants.TileLength);
drawParameters.Position = this._gameObject.Position;
drawParameters.Rotation = this.Rotation;
drawParameters.Effects = this.SpriteEffect;
drawParameters.Opacity = this.Opacity;
// Draw the current frame.
spriteBatch.DrawTexture(drawParameters);
}
private void DrawHull(ISpriteBatch spriteBatch, ISpriteLibrary spriteLibrary)
{
DrawParameters drawParameters = default;
drawParameters.Texture = spriteLibrary.GetSprite(TextureName);
// Calculate the source rectangle of the current frame.
drawParameters.AreaWithinTexture = new Rectangle(0, 0, Constants.TileLength, Constants.TileLength);
drawParameters.Position = this._tank.Position;
drawParameters.Rotation = this._tank.HullRotation;
// Draw the current frame.
spriteBatch.DrawTexture(drawParameters);
}
private void DrawTrack(ISpriteBatch spriteBatch, ISpriteLibrary spriteLibrary, int p2, double pctPositionInTrackAnimation)
{
DrawParameters drawParameters = default;
drawParameters.Texture = spriteLibrary.GetSprite(TextureName);
var frameCount = (drawParameters.Texture.Width / Constants.TileLength);
int frameIndex = (int)Math.Floor(frameCount * pctPositionInTrackAnimation);
// Calculate the source rectangle of the current frame.
drawParameters.AreaWithinTexture = new Rectangle(frameIndex * Constants.TileLength, p2, Constants.TileLength, Constants.TileLength);
drawParameters.Position = this._tank.Position;
drawParameters.Rotation = this._tank.HullRotation;
// Draw the current frame.
spriteBatch.DrawTexture(drawParameters);
}
private void DrawTurret(ISpriteBatch spriteBatch, ISpriteLibrary spriteLibrary)
{
Vector2 centreOfRotationForTurret = new Vector2(0, 3);
double x = centreOfRotationForTurret.Y * Math.Sin(this._tank.HullRotation) + centreOfRotationForTurret.X * Math.Cos(this._tank.HullRotation);
double y = centreOfRotationForTurret.Y * Math.Cos(this._tank.HullRotation) - centreOfRotationForTurret.X * Math.Sin(this._tank.HullRotation);
Vector2 centreOfRotationForTurretAfterRotation = new Vector2((float)-x, (float)y);
DrawParameters drawParameters = default;
drawParameters.Texture = spriteLibrary.GetSprite(TextureName);
// Calculate the source rectangle of the current frame.
drawParameters.AreaWithinTexture = new Rectangle(32, 0, Constants.TileLength, Constants.TileLength);
drawParameters.Position = this._tank.Position + centreOfRotationForTurretAfterRotation;
drawParameters.Rotation = this._tank.TurretRotation;
drawParameters.Centre = new Vector2(16, 19); // this is always the same - this is the point where we rotate the turret around in the source rectangle
// Draw the current frame.
spriteBatch.DrawTexture(drawParameters);
}