hapi-rs 0.21.0

Rust bindings to Houdini Engine API
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168

//! Volume and Heightfield APIs
use crate::Result;
use crate::ffi::{VolumeTileInfo, raw::HAPI_VolumeTileInfo};
use crate::node::HoudiniNode;

/// Volume primitive dimensions returned from [`crate::geometry::Geometry::volume_bounds()`]
#[derive(Debug, Clone, Default)]
pub struct VolumeBounds {
    pub x_min: f32,
    pub y_min: f32,
    pub z_min: f32,
    pub x_max: f32,
    pub y_max: f32,
    pub z_max: f32,
    pub x_center: f32,
    pub y_center: f32,
    pub z_center: f32,
}

pub trait VolumeStorage: Sized + Copy {
    fn read_tile(
        node: &HoudiniNode,
        part: i32,
        fill: Self,
        values: &mut [Self],
        tile: &HAPI_VolumeTileInfo,
    ) -> Result<()>;

    fn read_voxel(
        node: &HoudiniNode,
        part: i32,
        x: i32,
        y: i32,
        z: i32,
        values: &mut [Self],
    ) -> Result<()>;

    fn write_tile(
        node: &HoudiniNode,
        part: i32,
        values: &[Self],
        tile: &HAPI_VolumeTileInfo,
    ) -> Result<()>;

    fn write_voxel(
        node: &HoudiniNode,
        part: i32,
        x: i32,
        y: i32,
        z: i32,
        values: &[Self],
    ) -> Result<()>;
}

impl VolumeStorage for i32 {
    fn read_tile(
        node: &HoudiniNode,
        part: i32,
        fill_value: Self,
        values: &mut [Self],
        info: &HAPI_VolumeTileInfo,
    ) -> Result<()> {
        crate::ffi::get_volume_tile_int_data(node, part, fill_value, values, info)
    }

    fn read_voxel(
        node: &HoudiniNode,
        part: i32,
        x: i32,
        y: i32,
        z: i32,
        values: &mut [Self],
    ) -> Result<()> {
        crate::ffi::get_volume_voxel_int(node, part, x, y, z, values)
    }

    fn write_tile(
        node: &HoudiniNode,
        part: i32,
        values: &[Self],
        tile: &HAPI_VolumeTileInfo,
    ) -> Result<()> {
        crate::ffi::set_volume_tile_int_data(node, part, values, tile)
    }

    fn write_voxel(
        node: &HoudiniNode,
        part: i32,
        x: i32,
        y: i32,
        z: i32,
        values: &[Self],
    ) -> Result<()> {
        crate::ffi::set_volume_voxel_int(node, part, x, y, z, values)
    }
}

impl VolumeStorage for f32 {
    fn read_tile(
        node: &HoudiniNode,
        part: i32,
        fill_value: Self,
        values: &mut [Self],
        info: &HAPI_VolumeTileInfo,
    ) -> Result<()> {
        crate::ffi::get_volume_tile_float_data(node, part, fill_value, values, info)
    }

    fn read_voxel(
        node: &HoudiniNode,
        part: i32,
        x: i32,
        y: i32,
        z: i32,
        values: &mut [Self],
    ) -> Result<()> {
        crate::ffi::get_volume_voxel_float(node, part, x, y, z, values)
    }

    fn write_tile(
        node: &HoudiniNode,
        part: i32,
        values: &[Self],
        tile: &HAPI_VolumeTileInfo,
    ) -> Result<()> {
        crate::ffi::set_volume_tile_float_data(node, part, values, tile)
    }

    fn write_voxel(
        node: &HoudiniNode,
        part: i32,
        x: i32,
        y: i32,
        z: i32,
        values: &[Self],
    ) -> Result<()> {
        crate::ffi::set_volume_voxel_float(node, part, x, y, z, values)
    }
}

/// Represents a single tile in a volume.
/// Used with [`crate::geometry::Geometry::foreach_volume_tile`]
#[derive(Debug)]
pub struct Tile<'a> {
    pub info: &'a VolumeTileInfo,
    pub size: usize,
    pub index: i32,
}

pub(crate) fn iterate_tiles(
    node: &HoudiniNode,
    part: i32,
    tile_size: usize,
    callback: impl Fn(Tile),
) -> Result<()> {
    let mut tile = VolumeTileInfo(crate::ffi::get_volume_first_tile_info(node, part)?);
    let mut tile_num = 0;
    while tile.is_valid() {
        callback(Tile {
            info: &tile,
            size: tile_size,
            index: tile_num,
        });
        crate::ffi::get_volume_next_tile_info(node, part, &mut tile.0)?;
        tile_num += 1;
    }
    Ok(())
}