From 9222835f5d613592d36dd5c665138faef46faa0c Mon Sep 17 00:00:00 2001
From: Rekai Musuka <rekai@musuka.dev>
Date: Mon, 29 Mar 2021 21:07:10 -0500
Subject: [PATCH] chore: redo iteration inc/dec keybind behaviour

---
 src/main.rs | 51 +++++++++++++++++++++++++--------------------------
 1 file changed, 25 insertions(+), 26 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 5f22250..51ef552 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,62 +7,61 @@ fn main() {
     App::build()
         .add_plugins(DefaultPlugins)
         .add_startup_system(startup.system())
-        .add_resource(SpriteScale::default())
+        .add_resource(TextureOptions::default())
         .add_system(mandelbrot_render_system.system())
         .add_system(transform_mandelbrot_system.system())
         .run();
 }
 
-struct SpriteScale {
+struct TextureOptions {
     zoom: f64,
     horizontal: f64,
     vertical: f64,
     step: f64,
-    iterations: u32,
+    iteration_limit: u32,
 }
 
-impl Default for SpriteScale {
+impl Default for TextureOptions {
     fn default() -> Self {
         Self {
             zoom: 1.0,
             horizontal: 0.0,
             vertical: 0.0,
             step: 0.01,
-            iterations: 64,
+            iteration_limit: 64,
         }
     }
 }
 
-fn transform_mandelbrot_system(
-    input: Res<Input<KeyCode>>,
-    mut scale: ResMut<SpriteScale>,
-    // camera: Res<Camera>,
-) {
+fn transform_mandelbrot_system(input: Res<Input<KeyCode>>, mut scale: ResMut<TextureOptions>) {
+    // Zoom: E to Zoom In, Q to Zoom Out
+    // Horizontal Movement: D to move right, A to move left
+    // Vertical Movement: W to move up, S to move Down
+    // R to increase the steps taken by zoom, horizontal movement, and vertical movement
+    // T to increase the Iteration Limit, G to decrease the iteration limit
+
     let zoom = input.pressed(KeyCode::Q) as i8 - input.pressed(KeyCode::E) as i8;
     let horizontal = input.pressed(KeyCode::D) as i8 - input.pressed(KeyCode::A) as i8;
     let vertical = input.pressed(KeyCode::W) as i8 - input.pressed(KeyCode::S) as i8;
-    let step_mod = input.pressed(KeyCode::R) as i8 - input.pressed(KeyCode::F) as i8;
-    let iter_mod = input.pressed(KeyCode::T) as i8 - input.pressed(KeyCode::G) as i8;
+    let step_change = input.pressed(KeyCode::R) as i8 - input.pressed(KeyCode::F) as i8;
+    let limit_change = input.just_pressed(KeyCode::T) as i8 - input.just_pressed(KeyCode::G) as i8;
 
-    scale.step += (scale.step / 10.0) * step_mod as f64;
+    scale.step += (scale.step / 10.0) * step_change as f64;
     scale.vertical += scale.step * vertical as f64;
     scale.horizontal += scale.step * horizontal as f64;
     scale.zoom += scale.step * zoom as f64;
 
-    if iter_mod == 1 {
-        scale.iterations += (scale.step * 100.0) as u32;
+    if limit_change == 1 {
+        scale.iteration_limit *= 2;
 
-        if scale.iterations > 512 {
-            scale.iterations = 512;
+        if scale.iteration_limit > 512 {
+            scale.iteration_limit = 512;
         }
-    } else if iter_mod == -1 {
-        let step = (scale.step * 100.0) as u32;
-        let diff = scale.iterations as i64 - step as i64;
+    } else if limit_change == -1 {
+        scale.iteration_limit /= 2;
 
-        if diff < 32 {
-            scale.iterations = 32;
-        } else {
-            scale.iterations -= step;
+        if scale.iteration_limit < 32 {
+            scale.iteration_limit = 32;
         }
     }
 
@@ -78,7 +77,7 @@ fn transform_mandelbrot_system(
 fn mandelbrot_render_system(
     materials: Res<Assets<ColorMaterial>>,
     mut textures: ResMut<Assets<Texture>>,
-    scale: Res<SpriteScale>,
+    scale: Res<TextureOptions>,
     mut query: Query<(&mut Mandelbrot, &Handle<ColorMaterial>)>,
 ) {
     for (mut fractal, handle) in query.iter_mut() {
@@ -88,7 +87,7 @@ fn mandelbrot_render_system(
                     let z = scale.zoom;
                     let h = scale.horizontal;
                     let v = scale.vertical;
-                    let limit = scale.iterations;
+                    let limit = scale.iteration_limit;
 
                     let x = ((-2.5 * z) + h, (1.0 * z) + h);
                     let y = ((-1.0 * z) - v, (1.0 * z) - v);