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https://github.com/bevyengine/bevy
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# Objective Add `cross` and `cross_2d` gizmos in accordance with #13868. ## Solution Extend `Gizmos` to provide these functions. ## Testing Tested in `2d_gizmos` and `3d_gizmos` examples, and external projects.  
77 lines
2.4 KiB
Rust
77 lines
2.4 KiB
Rust
//! Additional [`Gizmos`] Functions -- Crosses
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//!
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//! Includes the implementation of [`Gizmos::cross`] and [`Gizmos::cross_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::Color;
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use bevy_math::{Mat2, Mat3, Quat, Vec2, Vec3};
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impl<Config> Gizmos<'_, '_, Config>
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where
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Config: GizmoConfigGroup,
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{
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/// Draw a cross in 3D at `position`.
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///
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/// This should be called for each frame the cross needs to be rendered.
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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::WHITE;
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/// fn system(mut gizmos: Gizmos) {
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/// gizmos.cross(Vec3::ZERO, Quat::IDENTITY, 0.5, WHITE);
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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 cross(
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&mut self,
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position: Vec3,
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rotation: Quat,
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half_size: f32,
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color: impl Into<Color>,
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) {
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let axes = half_size * Mat3::from_quat(rotation);
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let local_x = axes.col(0);
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let local_y = axes.col(1);
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let local_z = axes.col(2);
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let color: Color = color.into();
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self.line(position + local_x, position - local_x, color);
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self.line(position + local_y, position - local_y, color);
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self.line(position + local_z, position - local_z, color);
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}
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/// Draw a cross in 2D (on the xy plane) at `position`.
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///
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/// This should be called for each frame the cross needs to be rendered.
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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::WHITE;
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/// fn system(mut gizmos: Gizmos) {
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/// gizmos.cross_2d(Vec2::ZERO, 0.0, 0.5, WHITE);
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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 cross_2d(
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&mut self,
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position: Vec2,
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angle: f32,
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half_size: f32,
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color: impl Into<Color>,
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) {
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let axes = half_size * Mat2::from_angle(angle);
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let local_x = axes.col(0);
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let local_y = axes.col(1);
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let color: Color = color.into();
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self.line_2d(position + local_x, position - local_x, color);
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self.line_2d(position + local_y, position - local_y, color);
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}
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}
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