public static CollisionState PerPixel(ISprite sprite1, ISprite sprite2, Rectangle rect, GraphicsDeviceManager graphics)
{
// sets the coordinates relative to (0,0) being the top left corner of this.
Texture2D projTexture = sprite2.GetTexture();
Texture2D hitBoxTexture = sprite1.GetHitbox();
Texture2D vulnerableTexture = sprite1.GetVulnerable();
Color[] hitBoxPixels;
Color[] vulnerablePixels;
Color[] projectilePixels;
CollisionState results = CollisionState.None;
Rectangle objRect = rect;
Rectangle projRect = new Rectangle(0, 0, rect.Width, rect.Height);
//initial tests to see if the box is even applicable to the object texure being checked
if (rect.X + rect.Width <= 0 || rect.Y + rect.Height <= 0)
{
return(CollisionState.None);
}
if (rect.X >= sprite1.GetSpriteWidth() || rect.Y >= sprite1.GetSpriteHeight())
{
return(CollisionState.None);
}
if (rect.X < 0)
{
objRect.X = 0;
objRect.Width += rect.X;
projRect.X -= rect.X;
projRect.Width += rect.X;
}
if (rect.Y < 0)
{
objRect.Height += rect.Y;
objRect.Y = 0;
projRect.Y -= rect.Y;
projRect.Height = objRect.Height;
}
for (int i = 0; i <= objRect.Width; i++)
{
if (objRect.X + i == sprite1.GetSpriteWidth())
{
objRect.Width = i;
projRect.Width = objRect.Width;
break;
}
}
for (int i = 0; i <= objRect.Height; i++)
{
if (objRect.Y + i == sprite1.GetSpriteHeight())
{
objRect.Height = i;
projRect.Height = objRect.Height;
break;
}
}
if (objRect.Width == 0 || objRect.Height == 0)
{
return(0);
}
hitBoxPixels = new Color[objRect.Width * objRect.Height];
vulnerablePixels = new Color[objRect.Width * objRect.Height];
projectilePixels = new Color[objRect.Width * objRect.Height];
if (sprite2.GetMirrorX())
{
projTexture = sprite2.MirrorTexture(sprite2, graphics, sprite2.GetTexture());
}
if (sprite1.GetMirrorX())
{
hitBoxTexture = sprite1.MirrorTexture(sprite1, graphics, sprite1.GetHitbox());
vulnerableTexture = sprite1.MirrorTexture(sprite1, graphics, sprite1.GetVulnerable());
}
projTexture.GetData <Color>(
0, projRect, projectilePixels, 0, objRect.Width * objRect.Height
);
hitBoxTexture.GetData <Color>(
0, objRect, hitBoxPixels, 0, objRect.Width * objRect.Height
);
vulnerableTexture.GetData <Color>(
0, objRect, vulnerablePixels, 0, objRect.Width * objRect.Height
);
for (int y = 0; y < objRect.Height; y++)
{
for (int x = 0; x < objRect.Width; x++)
{
Color colorA = hitBoxPixels[y * objRect.Width + x];
Color colorB = projectilePixels[y * objRect.Width + x];
Color colorC = vulnerablePixels[y * objRect.Width + x];
if (colorA.A != 0 && colorB.A != 0)
{
if (results == CollisionState.None)
{
results = CollisionState.Standard;
}
}
if (colorC.A != 0 && colorB.A != 0)
{
results = CollisionState.Hurtbox;
break;
}
}
}
return(results);
}