Gradius is not rendering properly

quephird / happiNESs

An attempt at an NES emulator written in Swift

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Gradius is not rendering properly #24

Closed quephird closed 2 weeks ago

quephird commented 2 weeks ago

The game loads fine, and is barely playable but:

Only half of your ship is displayed
Bullets are not displayed at all
Enemies and powerups are mangled
The stars are fixed
The background tiles are mangled as well

The part about the stars not scrolling is likely due to the same thing causing the HUD in SMB to be fixed, namely that we're rendering once per entire frame, and not per pixel, and not checking the scroll registers frequently enough as their state can change mid-frame.

quephird commented 2 weeks ago

This turned out to be due to not handling 8x16 sprites. Gradius, and other games like Castlevania and Galaga which also use 8x16 sprites, now plays! Addressed in https://github.com/quephird/happiNESs/pull/30.