Iadvd
commented
4 years ago Hola! caramba no recibo notificaciones de preguntas, la encontre de casualidad!! IADVD means "I Am DaViD". I will answer in English so everybody can follow us... well, the reality is that my solution writes DIRECTLY at the screen. I just make the sp_Update() of the contents of the SPLIB buffer, and OVER it I update the stars at the screen address. How can I do that? I have made a trick: EVERY tile of the game does NOT have any single pixel or a couple of pixels together, alone in one byte (8 pixels) line of the image. So if you check the static tiles, or the tiles of the sprites, no one has a single byte line of pixels containing just a single pixel (like this: 00000001, 00000010,00000100,00001000,00010000,00100000,01000000,10000000) or two pixels together (any combination like this: 00000011, 00000110,00001100,00011000,00110000,01100000,11000000). It does not matter if you have any other combination. Then, when you move the stars and you want to write it in a new position, first you remove it from the current position. But if in the current position the byte of the image is not a pixel or a double pixel alone like the examples above, then means that there was another thing there (a planet or whatever), not a star, so no need to remove the star from the current position, because it was not being shown. Then next step is writing in the next position according to the movement of the star ship, so again the same rule: if in the target new position there is a byte of image containing something different from a "00000000" byte or a single pixel or a double pixel alone like in the samples above, then you do not need to write the star because there is something there (a planet or whatever, so it is BEHIND that object). Of course you keep in memory the new position of the star for the next movement, but you do not show it). Espero que no sea muy complicado de seguir! Greetings from Tokyo!!
fraespre
Hi iadvd (extrange nick),
I would like to ask you about how have you integrated the "star field" with the SPLIB graphics in the FederationZ. Because, I know that the SPLIB uses a graph buffer, and each time it dump the buffer to the screen everything over-writing. Do you draw the "star field" into the buffer ? I guess that not, so I think you draw the SF just after to the "updateNow" command of the SPLIB.
Thanks in advanced and greetings from Spain,