public static void update(BasicSprite character, SpriteContainer staticSprites, GameTime time)
{
for (int i = staticSprites.Count - 1; i >= 0; i--)
{
if (willCollide(character, staticSprites[i], time))
{
character.velocity = collisionWithSlip(character, staticSprites[i], time);
character.onCollide(staticSprites[i], data, time);
staticSprites[i].onCollide(character, data, time);
}
}
character.updatePosition();
}
public static Velocity collisionWithSlip(BasicSprite s1, BasicSprite s2)
{
if (willCollide(s1, s2))
{
s1.onCollide(s2);
s2.onCollide(s1);
if (s1.collidable && s2.collidable)
{
float vf1, vf2;
Velocity v1 = Velocity.FromCoordinates(s1.velocity.getDirection().X, 0.0f);
Velocity v2 = Velocity.FromCoordinates(s2.velocity.getDirection().X, 0.0f);
Rectangle collision = Rectangle.Intersect(new Rectangle(s1.getUpdatePositionFromVelocity(v1).ToPoint(), s1.spriteSize), new Rectangle(s2.getUpdatePositionFromVelocity(v2).ToPoint(), s2.spriteSize));
if (collision != Rectangle.Empty)
{
vf1 = (int)v1.getDirection().X + (Math.Sign(v1.getDirection().X) * -collision.Width);
}
else
{
vf1 = v1.getDirection().X;
}
v1 = Velocity.FromCoordinates(0.0f, s1.velocity.getDirection().Y);
v2 = Velocity.FromCoordinates(0.0f, s2.velocity.getDirection().Y);
collision = Rectangle.Intersect(new Rectangle(s1.getUpdatePositionFromVelocity(v1).ToPoint(), s1.spriteSize), new Rectangle(s2.getUpdatePositionFromVelocity(v2).ToPoint(), s2.spriteSize));
if (collision != Rectangle.Empty)
{
vf2 = (int)v1.getDirection().Y + (Math.Sign(v1.getDirection().Y) * -collision.Height);
}
else
{
vf2 = v1.getDirection().Y;
}
return(Velocity.FromCoordinates(vf1, vf2));
}
else
{
return(s1.velocity);
}
}
else
{
return(s1.velocity);
}
}
public static Velocity collisionWithSlip(BasicSprite s1, BasicSprite s2)
{
if (willCollide(s1, s2))
{
s1.onCollide(s2);
s2.onCollide(s1);
if (s1.collidable && s2.collidable)
{
float vf1, vf2;
Velocity v1 = Velocity.FromCoordinates(s1.velocity.getDirection().X, 0.0f);
Velocity v2 = Velocity.FromCoordinates(s2.velocity.getDirection().X, 0.0f);
Rectangle collision = Rectangle.Intersect(new Rectangle(s1.getUpdatePositionFromVelocity(v1).ToPoint(), s1.spriteSize), new Rectangle(s2.getUpdatePositionFromVelocity(v2).ToPoint(), s2.spriteSize));
if (collision != Rectangle.Empty)
vf1 = (int)v1.getDirection().X + (Math.Sign(v1.getDirection().X) * -collision.Width);
else
vf1 = v1.getDirection().X;
v1 = Velocity.FromCoordinates(0.0f, s1.velocity.getDirection().Y);
v2 = Velocity.FromCoordinates(0.0f, s2.velocity.getDirection().Y);
collision = Rectangle.Intersect(new Rectangle(s1.getUpdatePositionFromVelocity(v1).ToPoint(), s1.spriteSize), new Rectangle(s2.getUpdatePositionFromVelocity(v2).ToPoint(), s2.spriteSize));
if (collision != Rectangle.Empty)
vf2 = (int)v1.getDirection().Y + (Math.Sign(v1.getDirection().Y) * -collision.Height);
else
vf2 = v1.getDirection().Y;
return Velocity.FromCoordinates(vf1, vf2);
}
else
{
return s1.velocity;
}
} else
{
return s1.velocity;
}
}
public static bool willCollide(BasicSprite s1, BasicSprite s2, GameTime time)
{
Rectangle r = Rectangle.Intersect(new Rectangle(s1.getUpdatePosition().ToPoint(), s1.spriteSize), new Rectangle(s2.getUpdatePosition().ToPoint(), s2.spriteSize));
if ((r != Rectangle.Empty))
{
if (!(s1.collidable && s2.collidable))
{
s1.onCollide(s2, r, time);
s2.onCollide(s1, r, time);
}
return true;
}
return false;
}
