From de2886f7e964e53b0d1c48c6f56d2e43b078fc79 Mon Sep 17 00:00:00 2001
From: hut <hut@hut.pm>
Date: Mon, 1 Apr 2024 17:45:28 +0200
Subject: [PATCH] implement "relativeto" command

---
 src/commands.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/commands.rs b/src/commands.rs
index d259fff..7c31e2d 100644
--- a/src/commands.rs
+++ b/src/commands.rs
@@ -6,6 +6,7 @@ use bevy::math::DVec3;
 use crate::{actor, nature, world};
 use regex::Regex;
 use std::f32::consts::PI;
+use std::collections::HashMap;
 
 pub struct CommandsPlugin;
 impl Plugin for CommandsPlugin {
@@ -163,6 +164,7 @@ pub fn load_defs(
     let mut state = ParserState::default();
     let mut command;
     let mut parameters;
+    let mut id2pos: HashMap<String, DVec3> = HashMap::new();
 
     let mut line_nr = -1;
     while let Some(line) = lines.next() {
@@ -214,11 +216,23 @@ pub fn load_defs(
                     continue;
                 }
             }
+            ["relativeto", id] => {
+                match id2pos.get(&id.to_string()) {
+                    Some(pos) => {
+                        state.pos += *pos;
+                    }
+                    None => {
+                        error!("Specified `relativeto` command but could not find id `{id}`");
+                        continue;
+                    }
+                }
+            }
             ["sphere", "yes"] => {
                 state.is_sphere = true;
             }
             ["id", id] => {
                 state.id = id.to_string();
+                id2pos.insert(state.id.clone(), state.pos.clone());
             }
             ["alive", "yes"] => {
                 state.is_alive = true;