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use super::{ProjectionMatrix, ProjectionMatrixBuilder};
use crate::coord::ranged1d::Ranged;
use crate::coord::CoordTranslate;
use plotters_backend::BackendCoord;
use std::ops::Range;
/// A 3D cartesian coordinate system
pub struct Cartesian3d<X: Ranged, Y: Ranged, Z: Ranged> {
pub(crate) logic_x: X,
pub(crate) logic_y: Y,
pub(crate) logic_z: Z,
coord_size: (i32, i32, i32),
projection: ProjectionMatrix,
}
impl<X: Ranged, Y: Ranged, Z: Ranged> Cartesian3d<X, Y, Z> {
fn compute_default_size(actual_x: Range<i32>, actual_y: Range<i32>) -> i32 {
(actual_x.end - actual_x.start).min(actual_y.end - actual_y.start) * 4 / 5
}
fn create_projection<F: FnOnce(ProjectionMatrixBuilder) -> ProjectionMatrix>(
actual_x: Range<i32>,
actual_y: Range<i32>,
f: F,
) -> ProjectionMatrix {
let default_size = Self::compute_default_size(actual_x.clone(), actual_y.clone());
let center_3d = (default_size / 2, default_size / 2, default_size / 2);
let center_2d = (
(actual_x.end + actual_x.start) / 2,
(actual_y.end + actual_y.start) / 2,
);
let mut pb = ProjectionMatrixBuilder::new();
pb.set_pivot(center_3d, center_2d);
f(pb)
}
pub fn with_projection<
SX: Into<X>,
SY: Into<Y>,
SZ: Into<Z>,
F: FnOnce(ProjectionMatrixBuilder) -> ProjectionMatrix,
>(
logic_x: SX,
logic_y: SY,
logic_z: SZ,
(actual_x, actual_y): (Range<i32>, Range<i32>),
build_projection_matrix: F,
) -> Self {
let default_size = Self::compute_default_size(actual_x.clone(), actual_y.clone());
Self {
logic_x: logic_x.into(),
logic_y: logic_y.into(),
logic_z: logic_z.into(),
coord_size: (default_size, default_size, default_size),
projection: Self::create_projection(actual_x, actual_y, build_projection_matrix),
}
}
/// Set the projection matrix
pub fn set_projection<F: FnOnce(ProjectionMatrixBuilder) -> ProjectionMatrix>(
&mut self,
actual_x: Range<i32>,
actual_y: Range<i32>,
f: F,
) -> &mut Self {
self.projection = Self::create_projection(actual_x, actual_y, f);
self
}
/// Create a new coordinate
pub fn new<SX: Into<X>, SY: Into<Y>, SZ: Into<Z>>(
logic_x: SX,
logic_y: SY,
logic_z: SZ,
(actual_x, actual_y): (Range<i32>, Range<i32>),
) -> Self {
Self::with_projection(logic_x, logic_y, logic_z, (actual_x, actual_y), |pb| {
pb.into_matrix()
})
}
/// Get the projection matrix
pub fn projection(&self) -> &ProjectionMatrix {
&self.projection
}
/// Do not project, only transform the guest coordinate system
pub fn map_3d(&self, x: &X::ValueType, y: &Y::ValueType, z: &Z::ValueType) -> (i32, i32, i32) {
(
self.logic_x.map(x, (0, self.coord_size.0)),
self.logic_y.map(y, (0, self.coord_size.1)),
self.logic_z.map(z, (0, self.coord_size.2)),
)
}
/// Get the depth of the projection
pub fn projected_depth(&self, x: &X::ValueType, y: &Y::ValueType, z: &Z::ValueType) -> i32 {
self.projection.projected_depth(self.map_3d(x, y, z))
}
}
impl<X: Ranged, Y: Ranged, Z: Ranged> CoordTranslate for Cartesian3d<X, Y, Z> {
type From = (X::ValueType, Y::ValueType, Z::ValueType);
fn translate(&self, coord: &Self::From) -> BackendCoord {
let pixel_coord_3d = self.map_3d(&coord.0, &coord.1, &coord.2);
self.projection * pixel_coord_3d
}
}
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