| // ============================================================ | |
| // Coordinate types — DDGame sub-structs for screen and terrain coords | |
| // ============================================================ | |
| /// Coordinate entry used in DDGame viewport/camera tables (stride 0x10). | |
| /// | |
| /// Each entry tracks a camera center position as two pairs of Fixed16.16 | |
| /// coordinates (current and target). InitGameState initializes all four | |
| /// fields to the level center. | |
| pub struct CoordEntry { | |
| /// +0x00: Camera center X (Fixed16.16). | |
| pub center_x: crate::fixed::Fixed, | |
| /// +0x04: Camera center Y (Fixed16.16). | |
| pub center_y: crate::fixed::Fixed, | |
| /// +0x08: Camera center X target (Fixed16.16). | |
| pub center_x_target: crate::fixed::Fixed, | |
| /// +0x0C: Camera center Y target (Fixed16.16). | |
| pub center_y_target: crate::fixed::Fixed, | |
| } | |
| const _: () = assert!(core::mem::size_of::<CoordEntry>() == 0x10); | |
| // ============================================================ | |
| // CoordList — dynamic array of packed terrain coordinates | |
| // ============================================================ | |
| /// Packed terrain coordinate entry (8 bytes). | |
| /// | |
| /// `coord` packs x and y as `x * 0x10000 + y` (fixed-point). | |
| /// `flag` is always 1 for populated entries. | |
| pub struct CoordListEntry { | |
| pub coord: u32, | |
| pub flag: u32, | |
| } | |
| const _: () = assert!(core::mem::size_of::<CoordListEntry>() == 8); | |
| /// Dynamic coordinate array header (12 bytes). | |
| /// | |
| /// Allocated at DDGame+0x50C during `init_graphics_and_resources`. | |
| /// Data buffer is a separate allocation of `capacity * 8` bytes. | |
| /// Used for terrain coordinate lookups (spawning, aiming, collision). | |
| pub struct CoordList { | |
| /// Number of entries currently stored. | |
| pub count: u32, | |
| /// Maximum number of entries (600). | |
| pub capacity: u32, | |
| /// Pointer to the data buffer (`capacity * sizeof(CoordListEntry)` bytes). | |
| pub data: *mut CoordListEntry, | |
| } | |
| const _: () = assert!(core::mem::size_of::<CoordList>() == 12); | |