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use obj_exporter::*;
use psyche_core::brain::BrainActivityMap;
use psyche_core::error::*;
use psyche_core::neuron::Position;
use psyche_core::Scalar;
use std::io::Cursor;
use std::iter::repeat;
use std::string::FromUtf8Error;
#[derive(Debug, Clone)]
pub struct Config {
pub neurons: Option<Color>,
pub synapses: Option<Color>,
pub impulses: Option<Color>,
pub sensors: Option<Color>,
pub effectors: Option<Color>,
pub color_storage: ColorStorage,
}
impl Default for Config {
fn default() -> Self {
Self {
neurons: Some([255, 0, 255].into()),
synapses: Some([0, 0, 255].into()),
impulses: Some([192, 192, 255].into()),
sensors: Some([255, 255, 0].into()),
effectors: Some([128, 0, 0].into()),
color_storage: ColorStorage::Nowhere,
}
}
}
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub enum ColorStorage {
Nowhere,
Normals,
TexVertices,
}
impl Default for ColorStorage {
fn default() -> Self {
ColorStorage::Nowhere
}
}
/// (R, G, B)
#[derive(Debug, Copy, Clone)]
pub struct Color(u8, u8, u8);
impl From<(u8, u8, u8)> for Color {
fn from(value: (u8, u8, u8)) -> Self {
Self(value.0, value.1, value.2)
}
}
impl From<[u8; 3]> for Color {
fn from(value: [u8; 3]) -> Self {
Self(value[0], value[1], value[2])
}
}
/// generates OBJ string from activity map.
/// NOTE: Colors are stored either in vertices normals or texture vertices.
pub fn generate_string(activity_map: &BrainActivityMap, config: &Config) -> Result<String> {
match String::from_utf8(generate(activity_map, config)?) {
Ok(s) => Ok(s),
Err(e) => Err(utf8_into_error(e)),
}
}
/// generates OBJ bytes from activity map.
/// NOTE: Colors are stored either in vertices normals or texture vertices.
pub fn generate(activity_map: &BrainActivityMap, config: &Config) -> Result<Vec<u8>> {
let mut objects = vec![];
if let Some(ref neurons) = config.neurons {
if !activity_map.neurons.is_empty() {
objects.push(Object {
name: "neurons".to_owned(),
vertices: activity_map
.neurons
.iter()
.map(|p| Vertex {
x: p.x,
y: p.y,
z: p.z,
})
.collect(),
tex_vertices: if config.color_storage == ColorStorage::TexVertices {
let Color(r, g, b) = neurons;
repeat(TVertex {
u: Scalar::from(*r) / 255.0,
v: Scalar::from(*g) / 255.0,
w: Scalar::from(*b) / 255.0,
})
.take(activity_map.neurons.len())
.collect()
} else {
vec![]
},
normals: if config.color_storage == ColorStorage::Normals {
let Color(r, g, b) = neurons;
repeat(Vertex {
x: Scalar::from(*r) / 255.0,
y: Scalar::from(*g) / 255.0,
z: Scalar::from(*b) / 255.0,
})
.take(activity_map.neurons.len())
.collect()
} else {
vec![]
},
geometry: vec![Geometry {
material_name: None,
shapes: activity_map
.neurons
.iter()
.enumerate()
.map(|(i, _)| Shape {
primitive: Primitive::Point((i, None, None)),
groups: vec![],
smoothing_groups: vec![],
})
.collect(),
}],
});
}
}
if let Some(ref synapses) = config.synapses {
if !activity_map.connections.is_empty() {
objects.push(Object {
name: "synapses".to_owned(),
vertices: activity_map
.connections
.iter()
.flat_map(|(f, t, _)| {
vec![
Vertex {
x: f.x,
y: f.y,
z: f.z,
},
Vertex {
x: t.x,
y: t.y,
z: t.z,
},
]
})
.collect(),
tex_vertices: if config.color_storage == ColorStorage::TexVertices {
let Color(r, g, b) = synapses;
repeat(TVertex {
u: Scalar::from(*r) / 255.0,
v: Scalar::from(*g) / 255.0,
w: Scalar::from(*b) / 255.0,
})
.take(activity_map.connections.len())
.collect()
} else {
vec![]
},
normals: if config.color_storage == ColorStorage::Normals {
let Color(r, g, b) = synapses;
repeat(Vertex {
x: Scalar::from(*r) / 255.0,
y: Scalar::from(*g) / 255.0,
z: Scalar::from(*b) / 255.0,
})
.take(activity_map.connections.len())
.collect()
} else {
vec![]
},
geometry: vec![Geometry {
material_name: None,
shapes: activity_map
.connections
.iter()
.enumerate()
.map(|(i, _)| Shape {
primitive: Primitive::Line(
(i * 2, None, None),
(i * 2 + 1, None, None),
),
groups: vec![],
smoothing_groups: vec![],
})
.collect(),
}],
});
}
}
if let Some(ref impulses) = config.impulses {
if !activity_map.impulses.is_empty() {
let positions = activity_map
.impulses
.iter()
.map(|(s, e, f)| lerp(*s, *e, *f))
.collect::<Vec<_>>();
objects.push(Object {
name: "impulses".to_owned(),
vertices: positions
.iter()
.map(|p| Vertex {
x: p.x,
y: p.y,
z: p.z,
})
.collect(),
tex_vertices: if config.color_storage == ColorStorage::TexVertices {
let Color(r, g, b) = impulses;
repeat(TVertex {
u: Scalar::from(*r) / 255.0,
v: Scalar::from(*g) / 255.0,
w: Scalar::from(*b) / 255.0,
})
.take(positions.len())
.collect()
} else {
vec![]
},
normals: if config.color_storage == ColorStorage::Normals {
let Color(r, g, b) = impulses;
repeat(Vertex {
x: Scalar::from(*r) / 255.0,
y: Scalar::from(*g) / 255.0,
z: Scalar::from(*b) / 255.0,
})
.take(positions.len())
.collect()
} else {
vec![]
},
geometry: vec![Geometry {
material_name: None,
shapes: positions
.iter()
.enumerate()
.map(|(i, _)| Shape {
primitive: Primitive::Point((i, None, None)),
groups: vec![],
smoothing_groups: vec![],
})
.collect(),
}],
});
}
}
if let Some(ref sensors) = config.sensors {
if !activity_map.sensors.is_empty() {
objects.push(Object {
name: "sensors".to_owned(),
vertices: activity_map
.sensors
.iter()
.map(|p| Vertex {
x: p.x,
y: p.y,
z: p.z,
})
.collect(),
tex_vertices: if config.color_storage == ColorStorage::TexVertices {
let Color(r, g, b) = sensors;
repeat(TVertex {
u: Scalar::from(*r) / 255.0,
v: Scalar::from(*g) / 255.0,
w: Scalar::from(*b) / 255.0,
})
.take(activity_map.sensors.len())
.collect()
} else {
vec![]
},
normals: if config.color_storage == ColorStorage::Normals {
let Color(r, g, b) = sensors;
repeat(Vertex {
x: Scalar::from(*r) / 255.0,
y: Scalar::from(*g) / 255.0,
z: Scalar::from(*b) / 255.0,
})
.take(activity_map.sensors.len())
.collect()
} else {
vec![]
},
geometry: vec![Geometry {
material_name: None,
shapes: activity_map
.sensors
.iter()
.enumerate()
.map(|(i, _)| Shape {
primitive: Primitive::Point((i, None, None)),
groups: vec![],
smoothing_groups: vec![],
})
.collect(),
}],
});
}
}
if let Some(ref effectors) = config.effectors {
if !activity_map.effectors.is_empty() {
objects.push(Object {
name: "effectors".to_owned(),
vertices: activity_map
.effectors
.iter()
.map(|p| Vertex {
x: p.x,
y: p.y,
z: p.z,
})
.collect(),
tex_vertices: if config.color_storage == ColorStorage::TexVertices {
let Color(r, g, b) = effectors;
repeat(TVertex {
u: Scalar::from(*r) / 255.0,
v: Scalar::from(*g) / 255.0,
w: Scalar::from(*b) / 255.0,
})
.take(activity_map.effectors.len())
.collect()
} else {
vec![]
},
normals: if config.color_storage == ColorStorage::Normals {
let Color(r, g, b) = effectors;
repeat(Vertex {
x: Scalar::from(*r) / 255.0,
y: Scalar::from(*g) / 255.0,
z: Scalar::from(*b) / 255.0,
})
.take(activity_map.effectors.len())
.collect()
} else {
vec![]
},
geometry: vec![Geometry {
material_name: None,
shapes: activity_map
.effectors
.iter()
.enumerate()
.map(|(i, _)| Shape {
primitive: Primitive::Point((i, None, None)),
groups: vec![],
smoothing_groups: vec![],
})
.collect(),
}],
});
}
}
let set = ObjSet {
material_library: None,
objects,
};
let mut cursor = Cursor::new(vec![]);
export(&set, &mut cursor)?;
Ok(cursor.into_inner())
}
fn lerp(start: Position, end: Position, factor: Scalar) -> Position {
let factor = factor.max(0.0).min(1.0);
Position {
x: (end.x - start.x) * factor + start.x,
y: (end.y - start.y) * factor + start.y,
z: (end.z - start.z) * factor + start.z,
}
}
fn utf8_into_error(error: FromUtf8Error) -> Error {
Error::simple(format!("{}", error))
}