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https://github.com/bevyengine/bevy
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ee0fa7d1c2
# Objective - Adds 3d grids, suggestion of #9400 ## Solution - Added 3d grids (grids spanning all three dimensions, not flat grids) to bevy_gizmos --- ## Changelog - `gizmos.grid(...)` and `gizmos.grid_2d(...)` now return a `GridBuilder2d`. - Added `gizmos.grid_3d(...)` which returns a `GridBuilder3d`. - The difference between them is basically only that `GridBuilder3d` exposes some methods for configuring the z axis while the 2d version doesn't. - Allowed for drawing the outer edges along a specific axis by calling `.outer_edges_x()`, etc. on the builder. ## Additional information Please note that I have not added the 3d grid to any example as not to clutter them. Here is an image of what the 3d grid looks like: <img width="1440" alt="Screenshot 2024-03-12 at 02 19 55" src="https://github.com/bevyengine/bevy/assets/62256001/4cd3b7de-cf2c-4f05-8a79-920a4dd804b8"> --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
411 lines
13 KiB
Rust
411 lines
13 KiB
Rust
//! Additional [`Gizmos`] Functions -- Grids
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//!
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//! Includes the implementation of[`Gizmos::grid`] and [`Gizmos::grid_2d`].
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//! and assorted support items.
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use crate::prelude::{GizmoConfigGroup, Gizmos};
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use bevy_color::LinearRgba;
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use bevy_math::{Quat, UVec2, UVec3, Vec2, Vec3};
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/// A builder returned by [`Gizmos::grid_3d`]
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pub struct GridBuilder3d<'a, 'w, 's, T: GizmoConfigGroup> {
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gizmos: &'a mut Gizmos<'w, 's, T>,
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position: Vec3,
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rotation: Quat,
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spacing: Vec3,
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cell_count: UVec3,
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skew: Vec3,
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outer_edges: [bool; 3],
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color: LinearRgba,
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}
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/// A builder returned by [`Gizmos::grid`] and [`Gizmos::grid_2d`]
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pub struct GridBuilder2d<'a, 'w, 's, T: GizmoConfigGroup> {
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gizmos: &'a mut Gizmos<'w, 's, T>,
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position: Vec3,
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rotation: Quat,
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spacing: Vec2,
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cell_count: UVec2,
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skew: Vec2,
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outer_edges: [bool; 2],
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color: LinearRgba,
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}
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impl<T: GizmoConfigGroup> GridBuilder3d<'_, '_, '_, T> {
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/// Skews the grid by `tan(skew)` in the x direction.
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/// `skew` is in radians
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pub fn skew_x(mut self, skew: f32) -> Self {
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self.skew.x = skew;
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self
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}
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/// Skews the grid by `tan(skew)` in the y direction.
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/// `skew` is in radians
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pub fn skew_y(mut self, skew: f32) -> Self {
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self.skew.y = skew;
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self
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}
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/// Skews the grid by `tan(skew)` in the z direction.
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/// `skew` is in radians
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pub fn skew_z(mut self, skew: f32) -> Self {
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self.skew.z = skew;
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self
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}
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/// Skews the grid by `tan(skew)` in the x, y and z directions.
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/// `skew` is in radians
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pub fn skew(mut self, skew: Vec3) -> Self {
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self.skew = skew;
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self
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}
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/// Declare that the outer edges of the grid along the x axis should be drawn.
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/// By default, the outer edges will not be drawn.
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pub fn outer_edges_x(mut self) -> Self {
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self.outer_edges[0] = true;
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self
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}
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/// Declare that the outer edges of the grid along the y axis should be drawn.
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/// By default, the outer edges will not be drawn.
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pub fn outer_edges_y(mut self) -> Self {
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self.outer_edges[1] = true;
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self
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}
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/// Declare that the outer edges of the grid along the z axis should be drawn.
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/// By default, the outer edges will not be drawn.
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pub fn outer_edges_z(mut self) -> Self {
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self.outer_edges[2] = true;
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self
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}
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/// Declare that all outer edges of the grid should be drawn.
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/// By default, the outer edges will not be drawn.
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pub fn outer_edges(mut self) -> Self {
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self.outer_edges.fill(true);
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self
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}
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}
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impl<T: GizmoConfigGroup> GridBuilder2d<'_, '_, '_, T> {
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/// Skews the grid by `tan(skew)` in the x direction.
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/// `skew` is in radians
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pub fn skew_x(mut self, skew: f32) -> Self {
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self.skew.x = skew;
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self
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}
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/// Skews the grid by `tan(skew)` in the y direction.
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/// `skew` is in radians
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pub fn skew_y(mut self, skew: f32) -> Self {
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self.skew.y = skew;
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self
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}
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/// Skews the grid by `tan(skew)` in the x and y directions.
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/// `skew` is in radians
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pub fn skew(mut self, skew: Vec2) -> Self {
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self.skew = skew;
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self
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}
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/// Declare that the outer edges of the grid along the x axis should be drawn.
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/// By default, the outer edges will not be drawn.
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pub fn outer_edges_x(mut self) -> Self {
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self.outer_edges[0] = true;
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self
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}
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/// Declare that the outer edges of the grid along the y axis should be drawn.
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/// By default, the outer edges will not be drawn.
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pub fn outer_edges_y(mut self) -> Self {
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self.outer_edges[1] = true;
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self
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}
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/// Declare that all outer edges of the grid should be drawn.
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/// By default, the outer edges will not be drawn.
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pub fn outer_edges(mut self) -> Self {
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self.outer_edges.fill(true);
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self
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}
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}
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impl<T: GizmoConfigGroup> Drop for GridBuilder3d<'_, '_, '_, T> {
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fn drop(&mut self) {
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draw_grid(
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self.gizmos,
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self.position,
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self.rotation,
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self.spacing,
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self.cell_count,
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self.skew,
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self.outer_edges,
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self.color,
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);
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}
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}
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impl<T: GizmoConfigGroup> Drop for GridBuilder2d<'_, '_, '_, T> {
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fn drop(&mut self) {
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draw_grid(
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self.gizmos,
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self.position,
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self.rotation,
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self.spacing.extend(0.),
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self.cell_count.extend(0),
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self.skew.extend(0.),
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[self.outer_edges[0], self.outer_edges[1], true],
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self.color,
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);
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}
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}
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impl<'w, 's, T: GizmoConfigGroup> Gizmos<'w, 's, T> {
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/// Draw a 2D grid in 3D.
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///
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/// This should be called for each frame the grid needs to be rendered.
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///
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/// # Arguments
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///
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/// - `position`: The center point of the grid.
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/// - `rotation`: defines the orientation of the grid, by default we assume the grid is contained in a plane parallel to the XY plane.
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/// - `cell_count`: defines the amount of cells in the x and y axes
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/// - `spacing`: defines the distance between cells along the x and y axes
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/// - `color`: color of the grid
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///
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/// # Builder methods
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///
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/// - The skew of the grid can be adjusted using the `.skew(...)`, `.skew_x(...)` or `.skew_y(...)` methods. They behave very similar to their CSS equivalents.
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/// - All outer edges can be toggled on or off using `.outer_edges(...)`. Alternatively you can use `.outer_edges_x(...)` or `.outer_edges_y(...)` to toggle the outer edges along an axis.
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///
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/// # Example
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/// ```
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/// # use bevy_gizmos::prelude::*;
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/// # use bevy_render::prelude::*;
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/// # use bevy_math::prelude::*;
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/// # use bevy_color::palettes::basic::GREEN;
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/// fn system(mut gizmos: Gizmos) {
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/// gizmos.grid(
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/// Vec3::ZERO,
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/// Quat::IDENTITY,
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/// UVec2::new(10, 10),
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/// Vec2::splat(2.),
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/// GREEN
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/// )
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/// .skew_x(0.25)
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/// .outer_edges();
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/// }
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/// # bevy_ecs::system::assert_is_system(system);
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/// ```
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pub fn grid(
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&mut self,
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position: Vec3,
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rotation: Quat,
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cell_count: UVec2,
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spacing: Vec2,
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color: impl Into<LinearRgba>,
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) -> GridBuilder2d<'_, 'w, 's, T> {
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GridBuilder2d {
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gizmos: self,
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position,
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rotation,
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spacing,
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cell_count,
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skew: Vec2::ZERO,
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outer_edges: [false, false],
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color: color.into(),
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}
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}
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/// Draw a 3D grid of voxel-like cells.
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///
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/// This should be called for each frame the grid needs to be rendered.
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///
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/// # Arguments
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///
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/// - `position`: The center point of the grid.
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/// - `rotation`: defines the orientation of the grid, by default we assume the grid is contained in a plane parallel to the XY plane.
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/// - `cell_count`: defines the amount of cells in the x, y and z axes
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/// - `spacing`: defines the distance between cells along the x, y and z axes
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/// - `color`: color of the grid
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///
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/// # Builder methods
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///
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/// - The skew of the grid can be adjusted using the `.skew(...)`, `.skew_x(...)`, `.skew_y(...)` or `.skew_z(...)` methods. They behave very similar to their CSS equivalents.
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/// - All outer edges can be toggled on or off using `.outer_edges(...)`. Alternatively you can use `.outer_edges_x(...)`, `.outer_edges_y(...)` or `.outer_edges_z(...)` to toggle the outer edges along an axis.
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///
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/// # Example
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/// ```
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/// # use bevy_gizmos::prelude::*;
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/// # use bevy_render::prelude::*;
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/// # use bevy_math::prelude::*;
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/// # use bevy_color::palettes::basic::GREEN;
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/// fn system(mut gizmos: Gizmos) {
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/// gizmos.grid_3d(
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/// Vec3::ZERO,
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/// Quat::IDENTITY,
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/// UVec3::new(10, 2, 10),
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/// Vec3::splat(2.),
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/// GREEN
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/// )
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/// .skew_x(0.25)
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/// .outer_edges();
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/// }
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/// # bevy_ecs::system::assert_is_system(system);
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/// ```
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pub fn grid_3d(
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&mut self,
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position: Vec3,
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rotation: Quat,
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cell_count: UVec3,
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spacing: Vec3,
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color: impl Into<LinearRgba>,
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) -> GridBuilder3d<'_, 'w, 's, T> {
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GridBuilder3d {
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gizmos: self,
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position,
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rotation,
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spacing,
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cell_count,
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skew: Vec3::ZERO,
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outer_edges: [false, false, false],
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color: color.into(),
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}
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}
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/// Draw a grid in 2D.
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///
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/// This should be called for each frame the grid needs to be rendered.
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///
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/// # Arguments
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///
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/// - `position`: The center point of the grid.
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/// - `rotation`: defines the orientation of the grid.
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/// - `cell_count`: defines the amount of cells in the x and y axes
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/// - `spacing`: defines the distance between cells along the x and y axes
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/// - `color`: color of the grid
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///
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/// # Builder methods
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///
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/// - The skew of the grid can be adjusted using the `.skew(...)`, `.skew_x(...)` or `.skew_y(...)` methods. They behave very similar to their CSS equivalents.
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/// - All outer edges can be toggled on or off using `.outer_edges(...)`. Alternatively you can use `.outer_edges_x(...)` or `.outer_edges_y(...)` to toggle the outer edges along an axis.
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///
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/// # Example
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/// ```
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/// # use bevy_gizmos::prelude::*;
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/// # use bevy_render::prelude::*;
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/// # use bevy_math::prelude::*;
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/// # use bevy_color::palettes::basic::GREEN;
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/// fn system(mut gizmos: Gizmos) {
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/// gizmos.grid_2d(
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/// Vec2::ZERO,
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/// 0.0,
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/// UVec2::new(10, 10),
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/// Vec2::splat(1.),
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/// GREEN
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/// )
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/// .skew_x(0.25)
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/// .outer_edges();
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/// }
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/// # bevy_ecs::system::assert_is_system(system);
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/// ```
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pub fn grid_2d(
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&mut self,
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position: Vec2,
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rotation: f32,
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cell_count: UVec2,
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spacing: Vec2,
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color: impl Into<LinearRgba>,
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) -> GridBuilder2d<'_, 'w, 's, T> {
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GridBuilder2d {
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gizmos: self,
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position: position.extend(0.),
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rotation: Quat::from_rotation_z(rotation),
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spacing,
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cell_count,
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skew: Vec2::ZERO,
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outer_edges: [false, false],
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color: color.into(),
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}
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}
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}
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#[allow(clippy::too_many_arguments)]
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fn draw_grid<T: GizmoConfigGroup>(
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gizmos: &mut Gizmos<'_, '_, T>,
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position: Vec3,
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rotation: Quat,
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spacing: Vec3,
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cell_count: UVec3,
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skew: Vec3,
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outer_edges: [bool; 3],
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color: LinearRgba,
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) {
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if !gizmos.enabled {
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return;
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}
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// Offset between two adjacent grid cells along the x/y-axis and accounting for skew.
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let dx = spacing.x
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* Vec3::new(1., skew.y.tan(), skew.z.tan())
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* if cell_count.x != 0 { 1. } else { 0. };
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let dy = spacing.y
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* Vec3::new(skew.x.tan(), 1., skew.z.tan())
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* if cell_count.y != 0 { 1. } else { 0. };
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let dz = spacing.z
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* Vec3::new(skew.x.tan(), skew.y.tan(), 1.)
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* if cell_count.z != 0 { 1. } else { 0. };
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// Bottom-left-front corner of the grid
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let grid_start = position
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- cell_count.x as f32 / 2.0 * dx
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- cell_count.y as f32 / 2.0 * dy
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- cell_count.z as f32 / 2.0 * dz;
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let line_count = UVec3::new(
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if outer_edges[0] {
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cell_count.x + 1
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} else {
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cell_count.x.saturating_sub(1)
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},
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if outer_edges[1] {
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cell_count.y + 1
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} else {
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cell_count.y.saturating_sub(1)
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},
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if outer_edges[2] {
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cell_count.z + 1
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} else {
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cell_count.z.saturating_sub(1)
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},
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);
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let x_start = grid_start + if outer_edges[0] { Vec3::ZERO } else { dy + dz };
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let y_start = grid_start + if outer_edges[1] { Vec3::ZERO } else { dx + dz };
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let z_start = grid_start + if outer_edges[2] { Vec3::ZERO } else { dx + dy };
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// Lines along the x direction
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let dline = dx * cell_count.x as f32;
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for iy in 0..line_count.y {
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let iy = iy as f32;
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for iz in 0..line_count.z {
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let iz = iz as f32;
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let line_start = x_start + iy * dy + iz * dz;
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let line_end = line_start + dline;
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gizmos.line(rotation * line_start, rotation * line_end, color);
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}
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}
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// Lines along the y direction
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let dline = dy * cell_count.y as f32;
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for ix in 0..line_count.x {
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let ix = ix as f32;
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for iz in 0..line_count.z {
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let iz = iz as f32;
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let line_start = y_start + ix * dx + iz * dz;
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let line_end = line_start + dline;
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gizmos.line(rotation * line_start, rotation * line_end, color);
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}
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}
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// Lines along the z direction
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let dline = dz * cell_count.z as f32;
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for ix in 0..line_count.x {
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let ix = ix as f32;
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for iy in 0..line_count.y {
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let iy = iy as f32;
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let line_start = z_start + ix * dx + iy * dy;
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let line_end = line_start + dline;
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gizmos.line(rotation * line_start, rotation * line_end, color);
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}
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}
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}
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