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Global Struct
Thomyrock edited this page Jun 25, 2020
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Content of the struct "isaac" :
| Label | Size/Struct | Description |
|---|---|---|
| x | 1 byte | abscissa of Isaac |
| y | 1 byte | ordinate of Isaac |
| hp | 1 byte | health point of Isaac |
| dmg | 1 byte | damage dealt by Isaac |
| upgrades | 2 bytes | upgrades earned by Isaac (flags, to be defined) |
| range | 1 byte | 6 bits for range of Isaac's tears, 1 flag that tells if a tear was shot during the previous image |
| speed | 1 byte | Isaac speed (split in 2 x 4bits, x speed and y speed) |
| tears | 1 byte | 3 bits for horizontal speed of tears, 3 bits for vertical speed, 1 flag for "A was pressed the frame before", 1 flag for "B was pressed" |
| recover | 1 byte | recovery time |
| bombs | 1 byte | number of bombs Isaac has |
Content of the struct "element" :
| Label | Size/Struct | Description |
|---|---|---|
| x | 1 byte | position of the element |
| y | 1 byte | position of the element |
| speed | 1 byte | Element's speed (split in 2 x 4bits, x speed and y speed) |
| sheet | 1 byte | address to the corresponding generic sheet for the element (relative, first sheet will have address $00) |
| hp | 1 byte | the element's health |
| state | 2 bytes | address to the state of the element |
Content of struct "sheet" :
| Label | Size | Description |
|---|---|---|
| size | 1 byte | 3 bit for the size (index in a table to be defined), 5 flags (blocks, hurts, reacts to touch, can be hurt by bombs, can be hurt by Isaac's tears) |
| dmg | 1 byte | damage dealt by the enemy |
| function | 2 bytes | address to the AI function for enemies or the function triggered when touched |
| speed | 1 byte | max speed for this element |
| hp | 1 byte | max hp for this element |
Content of struct "state" :
| Label | Size | Description |
|---|---|---|
| empty | this struct is almost empty, it is kept for later improvement (ex : content needed for the enemies' AI) |
Content of struct "tear" :
| Label | Size | Description |
|---|---|---|
| x | 1 byte | abscissa of the tear |
| y | 1 byte | ordinate of the tear |
| direction | 1 byte | 2 x 3 bits (x and y) + 1 flag to know if the tear is alive + 1 flag to know if the tear is upgraded |
| Label | Value | Description |
|---|---|---|
| n_elements | 10 | number of element in the array global_.element
|
| n_sheets | 1 | number of sheet |
| n_states | 10 | number max of states |
| n_isaac_tears | 10 | number max of issac'stears |
| n_ennemy_tears | 10 | number max of ennemy's tears |
| Label | Size/Struct | Description |
|---|---|---|
| global_.sheets[n_sheets] | sheet * n_sheets | Element sheets. |
| gobal_.isaac | isaac | Isaac, the main caracter. |
| global_.elements[n_elements] | element * n_elements | Elements in the room, except for tears and isaac. |
| global_.issac_tear_pointer | 1 byte | Index of next tear to generate |
| global_.isaac_tears[n_isaac_tears] | tear * n_isaac_tears | tears of isaac |
| global_.ennemy_tear_pointer | 1 byte | Index of next tear to generate |
| global_.ennemy_tears[n_ennemy_tears] | tear * n_ennemy_tears | tears of the ennemys |
| global_.states[n_states] | state * n_states | States. |
TODO: define size tables.