119 lines
4.5 KiB
Rust
119 lines
4.5 KiB
Rust
use mevy::*;
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use bevy::{asset::embedded_asset, input::mouse::MouseWheel, math::{NormedVectorSpace, VectorSpace}, picking::{focus::HoverMap, pointer::PointerId}, prelude::*, utils::{dbg, HashMap}, window::PrimaryWindow};
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use crate::map::{self, MapMarker};
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pub struct Plugin;
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impl bevy::prelude::Plugin for Plugin {
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fn build(&self, app: &mut App) {
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app.add_systems(Startup, setup)
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.add_systems(Update, zoom_with_scroll);
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embedded_asset!(app, "../assets/ui/tree.png");
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}
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}
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#[derive(Component, Debug)]
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struct PointersDragging(HashMap<PointerId, Vec2>);
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#[derive(Component)]
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pub struct MapUIComponent;
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fn setup(
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mut world: Commands,
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asset_server: Res<AssetServer>
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) {
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spawn!{
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Node {width: 100%, height: 100%, display: Display::Flex, flex_direction: FlexDirection::Column, !};
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PickingBehavior {
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should_block_lower: false,
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is_hoverable: true
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};
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.observe(move |trigger: Trigger<Pointer<DragStart>>, mut ptrs: Query<&mut PointersDragging>| {
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if trigger.button == PointerButton::Primary {
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if let Ok(mut ptrs) = ptrs.get_mut(trigger.target) {
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ptrs.0.insert(trigger.pointer_id, trigger.pointer_location.position);
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}
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}
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});
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.observe(move |trigger: Trigger<Pointer<DragEnd>>, mut ptrs: Query<&mut PointersDragging>| {
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if trigger.button == PointerButton::Primary {
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ptrs.single_mut().0.remove(&trigger.pointer_id);
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}
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});
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.observe(|
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trigger: Trigger<Pointer<Drag>>,
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mut ptrs: Query<&mut PointersDragging>,
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mut cam: Query<&mut Transform, With<Camera2d>>,
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| {
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if trigger.button == PointerButton::Primary {
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let mut ptrs = ptrs.single_mut();
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if !ptrs.0.contains_key(&trigger.pointer_id) {
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return
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}
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let mut cam = cam.single_mut();
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let old_midpoint = ptrs.0.values().fold(Vec2::ZERO, |acc, pos| acc + (pos/ptrs.0.len() as f32));
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let old_d_to_midpoint = ptrs.0.values().fold(0., |acc, pos| acc + (old_midpoint-pos).norm());
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ptrs.0.insert(trigger.pointer_id, trigger.pointer_location.position);
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let new_midpoint = ptrs.0.values().fold(Vec2::ZERO, |acc, pos| acc + (pos/ptrs.0.len() as f32));
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let new_d_to_midpoint = ptrs.0.values().fold(0., |acc, pos| acc + (new_midpoint-pos).norm());
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// move camera
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cam.translation.x -= (new_midpoint.x - old_midpoint.x)*cam.scale.x;
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cam.translation.y += (new_midpoint.y - old_midpoint.y)*cam.scale.y;
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if ptrs.0.len() > 1 {
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cam.scale *= old_d_to_midpoint/new_d_to_midpoint;
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}
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}
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}
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);
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[map][
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Node{
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flex_grow: 1.,
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!};
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PointersDragging(HashMap::new());
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MapUIComponent;
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PickingBehavior {
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should_block_lower: false,
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is_hoverable: true
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};
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]
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[
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Node{
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width: 100%,
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height: 10vh,
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align_self: AlignSelf::FlexEnd,
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!};
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Button;
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BorderColor(#F00);
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BackgroundColor(#77767b);
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[
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ImageNode::new(asset_server.load("embedded://forestiles/../assets/ui/tree.png"));
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Node {
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height: 80%,
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margin: [>1vh],
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!};
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]
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]
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}
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// Spawn all ui elements as children of this one
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}
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fn zoom_with_scroll(
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mut cam: Query<&mut Transform, With<Camera2d>>,
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mut ev_scroll: EventReader<MouseWheel>,
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hover_map: Res<HoverMap>,
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window: Query<&Window, With<PrimaryWindow>>,
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map_ui_id: Query<Entity, With<MapUIComponent>>
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) {
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let map_ui_id = map_ui_id.single();
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if hover_map.get(&PointerId::Mouse).and_then(|hovered_ids| hovered_ids.get(&map_ui_id)).is_some() {
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let window = window.single();
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let mut cam = cam.single_mut();
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for ev in ev_scroll.read() {
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let scale = (cam.scale.x-(ev.y*0.1/window.width().min(window.height()))).clamp(0.0001, 2./window.width().min(window.height()));
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cam.scale = Vec3::new(scale, scale, scale);
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}
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}
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} |