sm64ex-coop/docs/lua/functions-5.md

## [:rewind: Lua Functions](functions.md)

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# functions from surface_collision.h

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## [find_ceil_height](#find_ceil_height)

### Lua Example
`local numberValue = find_ceil_height(x, y, z)`

### Parameters
| Field | Type |
| ----- | ---- |
| x | `number` |
| y | `number` |
| z | `number` |

### Returns
- `number`

### C Prototype
`f32 find_ceil_height(f32 x, f32 y, f32 z);`

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## [find_floor_height](#find_floor_height)

### Lua Example
`local numberValue = find_floor_height(x, y, z)`

### Parameters
| Field | Type |
| ----- | ---- |
| x | `number` |
| y | `number` |
| z | `number` |

### Returns
- `number`

### C Prototype
`f32 find_floor_height(f32 x, f32 y, f32 z);`

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## [find_poison_gas_level](#find_poison_gas_level)

### Lua Example
`local numberValue = find_poison_gas_level(x, z)`

### Parameters
| Field | Type |
| ----- | ---- |
| x | `number` |
| z | `number` |

### Returns
- `number`

### C Prototype
`f32 find_poison_gas_level(f32 x, f32 z);`

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## [find_wall_collisions](#find_wall_collisions)

### Lua Example
`local integerValue = find_wall_collisions(colData)`

### Parameters
| Field | Type |
| ----- | ---- |
| colData | [WallCollisionData](structs.md#WallCollisionData) |

### Returns
- `integer`

### C Prototype
`s32 find_wall_collisions(struct WallCollisionData *colData);`

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## [find_water_level](#find_water_level)

### Lua Example
`local numberValue = find_water_level(x, z)`

### Parameters
| Field | Type |
| ----- | ---- |
| x | `number` |
| z | `number` |

### Returns
- `number`

### C Prototype
`f32 find_water_level(f32 x, f32 z);`

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# functions from surface_load.h

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## [alloc_surface_pools](#alloc_surface_pools)

### Lua Example
`alloc_surface_pools()`

### Parameters
- None

### Returns
- None

### C Prototype
`void alloc_surface_pools(void);`

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## [clear_dynamic_surfaces](#clear_dynamic_surfaces)

### Lua Example
`clear_dynamic_surfaces()`

### Parameters
- None

### Returns
- None

### C Prototype
`void clear_dynamic_surfaces(void);`

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## [get_area_terrain_size](#get_area_terrain_size)

### Lua Example
`local integerValue = get_area_terrain_size(data)`

### Parameters
| Field | Type |
| ----- | ---- |
| data | `Pointer` <`integer`> |

### Returns
- `integer`

### C Prototype
`u32 get_area_terrain_size(s16 *data);`

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## [load_area_terrain](#load_area_terrain)

### Lua Example
`load_area_terrain(index, data, surfaceRooms, macroObjects)`

### Parameters
| Field | Type |
| ----- | ---- |
| index | `integer` |
| data | `Pointer` <`integer`> |
| surfaceRooms | `Pointer` <`integer`> |
| macroObjects | `Pointer` <`integer`> |

### Returns
- None

### C Prototype
`void load_area_terrain(s16 index, s16 *data, s8 *surfaceRooms, s16 *macroObjects);`

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## [load_object_collision_model](#load_object_collision_model)

### Lua Example
`load_object_collision_model()`

### Parameters
- None

### Returns
- None

### C Prototype
`void load_object_collision_model(void);`

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