Hi,
I'm sussing out some basic map collision utilizing fget(mget()) as one would for Pico-8 and I'm running into an issue where either large sprites aren't working correctly, or it's PEBKAC.
Specifically, it seems checking flags on any sprite that isn't 16x16 doesn't return the correct values, and any larger map sprite only reports correct flags for its upper left 16x16 corner. Smaller sprites
I've created a barebones sample to test this out after noticing in a proper project.
The gray squares are 16x16 for visual alignment. Yellow is a 32x32 player sprite, with each collision point along its edges visualized with pink. The other colored sprites are directly part of the map and and go from 16x16, 32x32, and 64x64. On collision, the point of contact (with the player's edge points) is added to a global render list for its own visualization, simple pink dots as well. We can see on each sprite that the TL 16x16 is the only point of contact.
Outside of the provided image, I also have my cart now rendering the actual sprite contacted in the upper left of the screen to confirm it's hitting what it thinks it is. I also did some toying around with further visualizations to get an idea of where my collider/mget thinks we're hitting, but it all seems cogent.
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Hi,
Currently toying around with Picotron basics after some (but not too much) prior experience with Pico8.
I'm trying to work with multiple layers and some degree of transparency between them but it's not quite working.
In the map screen, nearly all tiles are in the lowest layer; the top layer has only the single mushroom sprite on the far right. My assumption is that the default black in subsequent layers would act as transparency. I swear I had this working previously but am having trouble recreating it -- when I actually run the cart, the black of the upper layer acts as just solid black, only rendering the mushroom but nothing of the layer below (wizard character drawn at runtime).
Based on Pico8 docs, I've got a palt(0, true) in my _init() with the understanding it should turn black to alpha, but it seems to make no difference. I also see that black should certainly act as the transparent color by default anyway?
Anyone know what I'm doing wrong? Swapping layers renders that grassy layer as expected, with the lower layer (mushroom) totally hidden.
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