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Trying type parameters instead

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This commit is contained in:
Chris Hodapp 2020-02-27 21:51:34 -05:00
parent b454588f41
commit 4c626f6358
2 changed files with 381 additions and 349 deletions
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208
src/examples.rs
View File

@ -6,52 +6,60 @@ use crate::rule::{Rule, RuleStep, Child};
use crate::prim;
use crate::util;
fn curve_horn_start() -> RuleStep {
let id = nalgebra::geometry::Transform3::identity().to_homogeneous();
let flip180 = nalgebra::geometry::Rotation3::from_axis_angle(
&nalgebra::Vector3::y_axis(),
std::f32::consts::PI).to_homogeneous();
RuleStep {
geom: OpenMesh {
verts: vec![
struct CurveHorn {
seed: Vec<Vertex>,
id_xform: Mat4,
flip180: Mat4,
incr: Mat4,
}
impl CurveHorn {
fn init() -> CurveHorn {
let y = &Vector3::y_axis();
CurveHorn {
seed: vec![
vertex(-0.5, -0.5, 0.0),
vertex(-0.5, 0.5, 0.0),
vertex( 0.5, 0.5, 0.0),
vertex( 0.5, -0.5, 0.0),
],
id_xform: nalgebra::geometry::Transform3::identity().to_homogeneous(),
flip180: nalgebra::geometry::Rotation3::from_axis_angle(
&nalgebra::Vector3::y_axis(),
std::f32::consts::PI).to_homogeneous(),
incr: geometry::Rotation3::from_axis_angle(y, 0.1).to_homogeneous() *
Matrix4::new_scaling(0.95) *
geometry::Translation3::new(0.0, 0.0, 0.2).to_homogeneous(),
}
}
fn start(&self) -> RuleStep<Self> {
RuleStep {
geom: OpenMesh {
verts: self.seed.clone(),
faces: vec![],
},
final_geom: prim::empty_mesh(),
children: vec![
Child {
rule: Rule::Recurse(curve_horn_thing_rule),
xf: id,
rule: Rule::Recurse(Self::recur),
xf: self.id_xform,
vmap: vec![0,1,2,3],
},
Child {
rule: Rule::Recurse(curve_horn_thing_rule),
xf: flip180,
rule: Rule::Recurse(Self::recur),
xf: self.flip180,
vmap: vec![3,2,1,0],
},
],
}
}
fn curve_horn_thing_rule() -> RuleStep {
fn recur(&self) -> RuleStep<Self> {
let y = &Vector3::y_axis();
let m: Mat4 = geometry::Rotation3::from_axis_angle(y, 0.1).to_homogeneous() *
Matrix4::new_scaling(0.95) *
geometry::Translation3::new(0.0, 0.0, 0.2).to_homogeneous();
let verts = vec![
vertex(-0.5, -0.5, 0.0),
vertex(-0.5, 0.5, 0.0),
vertex( 0.5, 0.5, 0.0),
vertex( 0.5, -0.5, 0.0),
];
let next_verts: Vec<Vertex> = verts.iter().map(|v| m * v).collect();
let verts = self.seed.clone();
let next_verts: Vec<Vertex> = verts.iter().map(|v| self.incr * v).collect();
let geom = OpenMesh {
verts: next_verts.clone(),
@ -86,15 +94,25 @@ fn curve_horn_thing_rule() -> RuleStep {
final_geom: final_geom,
children: vec![
Child {
rule: Rule::Recurse(curve_horn_thing_rule),
xf: m,
rule: Rule::Recurse(Self::recur),
xf: self.incr,
vmap: vec![0,1,2,3],
},
],
}
}
}
fn cube_thing_rule() -> RuleStep {
struct CubeThing {
}
impl CubeThing {
fn init() -> CubeThing {
CubeThing {}
}
fn rec(&self) -> RuleStep<Self> {
let mesh = prim::cube();
@ -114,12 +132,12 @@ fn cube_thing_rule() -> RuleStep {
geometry::Rotation3::from_axis_angle(z, -qtr).to_homogeneous(),
];
let gen_rulestep = |rot: &Mat4| -> Child {
let gen_rulestep = |rot: &Mat4| -> Child<Self> {
let m: Mat4 = rot *
Matrix4::new_scaling(0.5) *
geometry::Translation3::new(6.0, 0.0, 0.0).to_homogeneous();
Child {
rule: Rule::Recurse(cube_thing_rule),
rule: Rule::Recurse(Self::rec),
xf: m,
vmap: vec![],
}
@ -131,9 +149,19 @@ fn cube_thing_rule() -> RuleStep {
children: turns.iter().map(gen_rulestep).collect(),
}
}
}
struct RamHorn {
}
impl RamHorn {
fn init() -> RamHorn {
RamHorn{}
}
// Conversion from Python & automata_scratch
fn ram_horn_start() -> RuleStep {
fn start(&self) -> RuleStep<Self> {
let opening_xform = |i| {
let r = std::f32::consts::FRAC_PI_2 * i;
((geometry::Rotation3::from_axis_angle(
@ -189,22 +217,22 @@ fn ram_horn_start() -> RuleStep {
final_geom: prim::empty_mesh(),
children: vec![
Child {
rule: Rule::Recurse(ram_horn),
rule: Rule::Recurse(Self::ram_horn),
xf: opening_xform(0.0),
vmap: vec![5,2,6,8],
},
Child {
rule: Rule::Recurse(ram_horn),
rule: Rule::Recurse(Self::ram_horn),
xf: opening_xform(1.0),
vmap: vec![4,1,5,8],
},
Child {
rule: Rule::Recurse(ram_horn),
rule: Rule::Recurse(Self::ram_horn),
xf: opening_xform(2.0),
vmap: vec![7,0,4,8],
},
Child {
rule: Rule::Recurse(ram_horn),
rule: Rule::Recurse(Self::ram_horn),
xf: opening_xform(3.0),
vmap: vec![6,3,7,8],
},
@ -214,7 +242,7 @@ fn ram_horn_start() -> RuleStep {
}
}
fn ram_horn() -> RuleStep {
fn ram_horn(&self) -> RuleStep<Self> {
let v = Unit::new_normalize(Vector3::new(-1.0, 0.0, 1.0));
let incr: Mat4 = geometry::Translation3::new(0.0, 0.0, 0.8).to_homogeneous() *
geometry::Rotation3::from_axis_angle(&v, 0.3).to_homogeneous() *
@ -251,53 +279,68 @@ fn ram_horn() -> RuleStep {
final_geom: final_geom,
children: vec![
Child {
rule: Rule::Recurse(ram_horn),
rule: Rule::Recurse(Self::ram_horn),
xf: incr,
vmap: vec![0,1,2,3],
},
],
}
}
/*
fn ram_horn_branch() -> RuleStep {
}
*/
// Meant to be a copy of twist_from_gen from Python & automata_scratch
pub fn twist_start() -> RuleStep {
//let ang=0.1;
let dx0=2.0;
let count=4;
// TODO: Factor these out (see twist)
struct Twist {
seed: Vec<Vertex>,
seed_sub: Vec<Vertex>,
dx0: f32,
dy: f32,
ang: f32,
count: usize,
subdiv: usize,
}
let seed = util::subdivide_cycle(&vec![
impl Twist {
pub fn init() -> Twist {
let subdiv = 2;
let seed = vec![
vertex(-0.5, 0.0, -0.5),
vertex( 0.5, 0.0, -0.5),
vertex( 0.5, 0.0, 0.5),
vertex(-0.5, 0.0, 0.5),
], 2);
// TODO: Factor out
let n = seed.len();
// TODO: Factor out subdiv size
];
let seed_sub = util::subdivide_cycle(&seed, subdiv);
Twist {
dx0: 2.0,
dy: 0.1,
ang: 0.1,
count: 4,
seed: seed,
seed_sub: seed_sub,
subdiv: subdiv,
}
}
// Meant to be a copy of twist_from_gen from Python & automata_scratch
pub fn start(&self) -> RuleStep<Twist> {
let n = self.seed.len();
// Quarter-turn in radians:
let qtr = std::f32::consts::FRAC_PI_2;
let y = &Vector3::y_axis();
let xform = |i| {
(geometry::Rotation3::from_axis_angle(y, qtr * (i as f32)).to_homogeneous() *
geometry::Translation3::new(dx0, 0.0, 0.0).to_homogeneous())
geometry::Translation3::new(self.dx0, 0.0, 0.0).to_homogeneous())
};
// First generate 'count' children, each one shifted/rotated
// differently:
let children: Vec<Child> = (0..count).map(|i| {
let children: Vec<Child<Twist>> = (0..self.count).map(|i| {
let xf = xform(i);
Child {
rule: Rule::Recurse(twist),
rule: Rule::Recurse(Self::recur),
xf: xf,
vmap: (n*i..n*(i+count)).collect(), // N.B.
vmap: (n*i..n*(i+self.count)).collect(), // N.B.
}
}).collect();
@ -305,7 +348,7 @@ pub fn twist_start() -> RuleStep {
// this same transform:
let mut verts = vec![];
for child in &children {
verts.extend(seed.iter().map(|v| child.xf * v));
verts.extend(self.seed_sub.iter().map(|v| child.xf * v));
}
RuleStep {
@ -319,43 +362,32 @@ pub fn twist_start() -> RuleStep {
}
}
pub fn twist() -> RuleStep {
let ang=0.1;
let dx0=2.0;
let dy=0.1;
// TODO: Factor these out (see twist_start)
pub fn recur(&self) -> RuleStep<Twist> {
let y = &Vector3::y_axis();
let incr = geometry::Translation3::new(-dx0, 0.0, 0.0).to_homogeneous() *
geometry::Rotation3::from_axis_angle(y, ang).to_homogeneous() *
geometry::Translation3::new(dx0, dy, 0.0).to_homogeneous();
let incr = geometry::Translation3::new(-self.dx0, 0.0, 0.0).to_homogeneous() *
geometry::Rotation3::from_axis_angle(y, self.ang).to_homogeneous() *
geometry::Translation3::new(self.dx0, self.dy, 0.0).to_homogeneous();
let seed_orig = vec![
vertex(-0.5, 0.0, -0.5),
vertex( 0.5, 0.0, -0.5),
vertex( 0.5, 0.0, 0.5),
vertex(-0.5, 0.0, 0.5),
// TODO: Likewise factor these out
].iter().map(|v| incr * v).collect();
let seed = util::subdivide_cycle(&seed_orig, 2);
let n = seed.len();
// TODO: Factor out subdiv size
let seed_orig = self.seed.iter().map(|v| incr * v).collect();
let seed_sub = util::subdivide_cycle(&seed_orig, self.subdiv);
let n = seed_sub.len();
RuleStep {
geom: OpenMesh {
verts: seed,
verts: seed_sub,
faces: util::parallel_zigzag_faces(n),
},
final_geom: prim::empty_mesh(), // TODO: Close properly
children: vec![
Child {
rule: Rule::Recurse(twist),
rule: Rule::Recurse(Self::recur),
xf: incr,
vmap: (0..n).collect(),
},
],
}
}
}
pub fn main() {
@ -371,20 +403,20 @@ pub fn main() {
println!("vs2={:?}", vs2);
}
let run_test = |r: Rule, iters, name| {
fn run_test<A>(a: A, r: Rule<A>, iters: u32, name: &str) {
println!("Running {}...", name);
let (mesh, nodes) = r.to_mesh(iters);
let (mesh, nodes) = r.to_mesh(&a, iters);
println!("Merged {} nodes", nodes);
let fname = format!("{}.stl", name);
println!("Writing {}...", fname);
mesh.write_stl_file(&fname).unwrap();
};
}
run_test(Rule::Recurse(cube_thing_rule), 3, "cube_thing");
run_test(CubeThing::init(), Rule::Recurse(CubeThing::rec), 3, "cube_thing");
// this can't work on its own because the resultant OpenMesh still
// has parent references:
//run_test(Rule::Recurse(curve_horn_thing_rule), 100, "curve_horn_thing");
run_test(Rule::Recurse(curve_horn_start), 100, "curve_horn2");
run_test(Rule::Recurse(ram_horn_start), 200, "ram_horn");
run_test(Rule::Recurse(twist_start), 200, "twist");
//run_test(Rule::Recurse(recur), 100, "curve_horn_thing");
run_test(CurveHorn::init(), Rule::Recurse(CurveHorn::start), 100, "curve_horn2");
run_test(RamHorn::init(), Rule::Recurse(RamHorn::start), 200, "ram_horn");
run_test(Twist::init(), Rule::Recurse(Twist::start), 200, "twist");
}

22
src/rule.rs
View File

@ -6,9 +6,9 @@ use crate::prim;
/// - produces geometry when it is evaluated
/// - tells what other rules to invoke, and what to do with their
/// geometry
pub enum Rule {
pub enum Rule<A> {
/// Produce some geometry, and possibly recurse further.
Recurse(fn () -> RuleStep),
Recurse(fn (&A) -> RuleStep<A>),
/// Produce nothing and recurse no further.
EmptyRule,
}
@ -28,7 +28,7 @@ pub enum Rule {
/// - if recursion continues, the rules of `children` are evaluated,
/// and the resultant geometry is transformed and then connected with
/// `geom`.
pub struct RuleStep {
pub struct RuleStep<A> {
/// The geometry generated at just this iteration
pub geom: OpenMesh,
@ -43,16 +43,16 @@ pub struct RuleStep {
/// The child invocations (used if recursion continues). The
/// 'parent' mesh, from the perspective of all geometry produced
/// by `children`, is `geom`.
pub children: Vec<Child>,
pub children: Vec<Child<A>>,
}
/// `Child` evaluations, pairing another `Rule` with the
/// transformations and parent vertex mappings that should be applied
/// to it.
pub struct Child {
pub struct Child<A> {
/// Rule to evaluate to produce geometry
pub rule: Rule,
pub rule: Rule<A>,
/// The transform to apply to all geometry produced by `rule`
/// (including its own `geom` and `final_geom` if needed, as well
@ -67,7 +67,7 @@ pub struct Child {
pub vmap: Vec<usize>,
}
impl Rule {
impl<A> Rule<A> {
// TODO: Do I want to make 'geom' shared somehow, maybe with Rc? I
// could end up having a lot of identical geometry that need not be
@ -80,14 +80,14 @@ impl Rule {
/// Convert this `Rule` to mesh data, recursively. `iters_left`
/// sets the maximum recursion depth. This returns (geometry,
/// number of rule evaluations).
pub fn to_mesh(&self, iters_left: u32) -> (OpenMesh, u32) {
pub fn to_mesh(&self, arg: &A, iters_left: u32) -> (OpenMesh, u32) {
let mut evals: u32 = 1;
if iters_left <= 0 {
match self {
Rule::Recurse(f) => {
let rs: RuleStep = f();
let rs: RuleStep<A> = f(arg);
return (rs.final_geom, 1);
}
Rule::EmptyRule => {
@ -98,13 +98,13 @@ impl Rule {
match self {
Rule::Recurse(f) => {
let rs: RuleStep = f();
let rs: RuleStep<A> = f(arg);
// TODO: This logic is more or less right, but it
// could perhaps use some un-tupling or something.
let subgeom: Vec<(OpenMesh, &Vec<usize>)> = rs.children.iter().map(|sub| {
// Get sub-geometry (still un-transformed):
let (submesh, eval) = sub.rule.to_mesh(iters_left - 1);
let (submesh, eval) = sub.rule.to_mesh(arg, iters_left - 1);
// Tally up eval count:
evals += eval;