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We were abusing on tile collision for this, and it wasn't
exact. Not only that, but if the player was fast enough, sometimes the
item wouldn't drop as the accelaration would pass through that
zone. Avoid that by simply using regular screen coordinates, which
aren't too hard to check in this case.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
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More specifically, whenever the player dies and we need to reset the
screen, wait for items to fall in the same way as we do for explosions
to disappear.
This also brought with it some other changes like removing sprite reset
on screen initialization.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
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Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
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Just like in the original, the shuttle turns purple for each fuel
tank. That being said, due to the restriction from the NES/Famicom on
updating background tile attributes, a "half-filled" strategy is being
used here to convey the same idea for a total of 6 fuel tanks to be
delivered.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
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Every now and then an item will fall and, as in the original game, a
fuel tank will be delivered whenever needed. There are still some things
left out for later changes, like picking up items mid-air, or background
effects for the rocket being filled with fuel.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
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This now only supports the appearance of shuttle parts and the fact that
the player can collect them at a very specific order and drop them so to
stack up the final shuttle.
This is of course just the skeleton and there's a bunch of TODO's left.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
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