public SwordSprite(Texture2D texture, int msPerFrame, float scale, Vector2 rotationPoint, CombatableCharacter swordOwner)
{
this.layerDepth = DEFAULT_LAYER_DEPTH;
this.msPerFrame = msPerFrame;
this.texture = texture;
this.scale = scale;
this.rotationPoint = rotationPoint;
this.rotation = 0;
this.swordOwner = swordOwner;
Animating = false;
charactersHit = new List<CombatableCharacter>();
// Extract collision data
textureData =
new Color[texture.Width * texture.Height];
texture.GetData(textureData);
}
public void Attack(CombatableCharacter enemy)
{
int damage = (int)(Strength - (0.5 * enemy.Defense));
enemy.HitPoints -= damage;
}
// source: http://xbox.create.msdn.com/en-US/education/catalog/tutorial/collision_2d_perpixel_transformed
public bool Intersects(CombatableCharacter character, GameLevel currentLevel)
{
bool intersectionOccured = false;
// Update the character's transform
Matrix characterTransform =
Matrix.CreateTranslation(new Vector3(character.Position, 0.0f));
// Build the sword's transform
Matrix swordTransform =
Matrix.CreateTranslation(new Vector3(-rotationPoint, 0.0f)) *
Matrix.CreateScale(scale) *
Matrix.CreateRotationZ(rotation) *
Matrix.CreateTranslation(new Vector3(anchorPosition, 0.0f));
// Calculate the bounding rectangle of this block in world space
int anchorOffset = (int)(rotationPoint.Y - texture.Height);
Rectangle swordRectangle = CalculateBoundingRectangle(
new Rectangle(0, 0,
(int)(anchorOffset + texture.Width),
(int)(anchorOffset + texture.Height)),
swordTransform);
// The per-pixel check is expensive, so check the bounding rectangles
// first to prevent testing pixels when collisions are impossible.
if (character.AsRectangle().Intersects(swordRectangle))
{
// Check collision with person
if (IntersectPixels(characterTransform, character.CharacterSprite.Texture.Width,
character.CharacterSprite.Texture.Height, character.TextureData,
swordTransform, texture.Width,
texture.Height, textureData))
{
intersectionOccured = true;
}
}
return intersectionOccured;
}
