public static CollisionState PerPixelSprite(ISprite sprite1, ISprite sprite2, GraphicsDeviceManager graphics)
{
int xOffset = 0;
int yOffset = 0;
int widthOffset = 0;
int heightOffset = 0;
if (sprite2 is Spaceman)
{
xOffset = 2;
yOffset = 1;
widthOffset = -4;
heightOffset = -1;
}
Rectangle rect = new Rectangle((int)(sprite2.GetDestRect().X - sprite1.GetDestRect().X + xOffset), (int)(sprite2.GetDestRect().Y - sprite1.GetDestRect().Y + yOffset), sprite2.GetSpriteWidth() + widthOffset, sprite2.GetSpriteHeight() + heightOffset);
return(PerPixel(sprite1, sprite2, rect, graphics));
}
// for rectangular collisions between two sprites.
public static bool RectCollisionDetect(ISprite sprite1, ISprite sprite2)
{
Color[] pixels;
int spriteWidth = sprite2.GetSpriteWidth() + (sprite2 is Spaceman? -4 : 0); // because the hitbox on the spaceman should be slightly smaller than it is.
int spriteHeight = sprite2.GetSpriteHeight() + (sprite2 is Spaceman ? -1 : 0);
Rectangle rect = new Rectangle((int)(sprite2.GetDestRect().X - sprite1.GetDestRect().X + (sprite2 is Spaceman ? 2 : 0)), (int)(sprite2.GetDestRect().Y - sprite1.GetDestRect().Y + (sprite2 is Spaceman ? 1 : 0)), spriteWidth, spriteHeight); // this rectangle represents the space the sprite takes up relative to "this"'s top left corner
Rectangle newRect = rect; // newRect is the actual rectangle to check
//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(false);
}
if (rect.X >= sprite1.GetSpriteWidth() || rect.Y >= sprite1.GetSpriteHeight())
{
return(false);
}
// Removes the space on the rectangle that is outside of the bounds of "this"'s texture
if (rect.X < 0)
{
newRect.X = 0;
newRect.Width += rect.X;
}
if (rect.Y < 0)
{
newRect.Y = 0;
newRect.Height += rect.Y;
}
if (newRect.X + newRect.Width > sprite1.GetSpriteWidth())
{
for (int i = 0; i <= sprite1.GetSpriteWidth(); i++)
{
if (newRect.X + i == sprite1.GetSpriteWidth())
{
newRect.Width = i;
break;
}
}
}
if (newRect.Y + newRect.Height > sprite1.GetSpriteHeight())
{
for (int i = 0; i <= sprite1.GetSpriteHeight(); i++)
{
if (newRect.Y + i == sprite1.GetSpriteHeight())
{
newRect.Height = i;
break;
}
}
}
if (newRect.Width == 0 || newRect.Height == 0)
{
return(false);
}
pixels = new Color[newRect.Width * newRect.Height];
sprite1.GetTexture().GetData <Color>(
0, newRect, pixels, 0, newRect.Width * newRect.Height
);
for (int y = 0; y < newRect.Height; y++)
{
for (int x = 0; x < newRect.Width; x++)
{
Color colorA = pixels[y * newRect.Width + x];
if (colorA.A != 0)
{
return(true);
}
}
}
return(false);
}
public static bool CheckMapCollision(int xOffset, int yOffset, ISprite sprite, Map map)
{
return(MapCollisionDetect(sprite.GetSpriteWidth(), sprite.GetSpriteHeight(), OffsetRect(sprite.GetDestRect(), xOffset, yOffset).ToRectangle(), map));
}