From e79fbf72c80fb2f53b89d53d101e55feded7ed5f Mon Sep 17 00:00:00 2001
From: shoe <shoe@tilde.town>
Date: Fri, 21 Mar 2025 20:36:10 +0000
Subject: [PATCH] Red square moving (he fuckin goin)

---
 random-walkers.js | 37 +++++++++++++++++++++++++++++--------
 1 file changed, 29 insertions(+), 8 deletions(-)

diff --git a/random-walkers.js b/random-walkers.js
index aa3709f..5251bfc 100644
--- a/random-walkers.js
+++ b/random-walkers.js
@@ -99,6 +99,23 @@ function move_walker(walker, possible_directions) {
   walker.y_velocity = walker.speed * Math.sin(walker.angle)
 }
 
+function add_random_direction(pos) {
+  let rand = Math.floor(Math.random() * 4);
+  if (rand === 0) {
+    pos.row++;
+    pos.row = pos.row.mod(n_rows);
+  } else if (rand === 1) {
+    pos.row--;
+    pos.row = pos.row.mod(n_rows);
+  } else if (rand === 2) {
+    pos.col++;
+    pos.col = pos.col.mod(n_cols);
+  } else {
+    pos.col--;
+    pos.col = pos.col.mod(n_cols);
+  }
+}
+
 /****************************************************************************
  * Drawing                                                                  *
  ****************************************************************************/
@@ -115,6 +132,9 @@ function draw() {
     var old_n_cols = n_cols;
     n_rows = canvas.height.div(controls.cell_size);
     n_cols = canvas.width.div(controls.cell_size);
+    offset_h = (canvas.width - (controls.cell_size * n_cols)).div(2);
+    offset_v = (canvas.height - (controls.cell_size * n_rows)).div(2);
+    offset = {h: offset_h, v: offset_v};
     // TODO: for every walker and every trail, adjust their position to the new canvas size
     // we wanna just mod it, probably. that way if you shrink it you don't
     // lose anything.
@@ -126,11 +146,14 @@ function draw() {
   // grid of all one color.
   draw_grid();
 
+  // draw a colored square at the walker location
+  draw_grid_square(walker_pos.row, walker_pos.col, "red");
+  add_random_direction(walker_pos);
 
   // TODO CODE
 }
 
-function draw_grid_square(row, col, color, offset) {
+function draw_grid_square(row, col, color) {
   var margin = 2;
 
   ctx.fillStyle = color;
@@ -142,14 +165,10 @@ function draw_grid_square(row, col, color, offset) {
 
 
 function draw_grid() {
-  var offset_h = (canvas.width - (controls.cell_size * n_cols)).div(2);
-  var offset_v = (canvas.height - (controls.cell_size * n_rows)).div(2);
-  var offset = {h: offset_h, v: offset_v};
-
   // Actually draw the cells lol
   for (var row = 0; row < n_rows; row++) {
     for (var col = 0; col < n_cols; col++) {
-      draw_grid_square(row, col, "#282828", offset);
+      draw_grid_square(row, col, "#282828");
     }
   }
 }
@@ -167,8 +186,10 @@ canvas.height = window.innerHeight;
 // compute the initial rows and columns
 var n_rows = canvas.height.div(controls.cell_size);
 var n_cols = canvas.width.div(controls.cell_size);
+var offset_h = (canvas.width - (controls.cell_size * n_cols)).div(2);
+var offset_v = (canvas.height - (controls.cell_size * n_rows)).div(2);
+var offset = {h: offset_h, v: offset_v};
 
 // set start position of walker and start the random walk
-var walker_position = {x: n_rows.div(2), y: n_cols.div(2)};
-var trail_positions = [];
+var walker_pos = {row: n_rows.div(2), col: n_cols.div(2)};
 init_walk();