From 32d141f848d6c678200d426839f0ab43fdb49dd0 Mon Sep 17 00:00:00 2001
From: Able <abl3theabove@gmail.com>
Date: Mon, 30 Sep 2024 08:56:37 -0500
Subject: [PATCH] commit sin

---
 .gitignore          |   1 +
 Cargo.lock          | 847 ++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml          |   9 +
 rust-toolchain.toml |   2 +
 shell.nix           |  68 ++++
 src/engine.rs       | 152 ++++++++
 src/main.rs         |   8 +
 src/materials.rs    |   2 +
 src/rand.rs         |  21 ++
 9 files changed, 1110 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 rust-toolchain.toml
 create mode 100644 shell.nix
 create mode 100644 src/engine.rs
 create mode 100644 src/main.rs
 create mode 100644 src/materials.rs
 create mode 100644 src/rand.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
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diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..2ee9893
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+++ b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..980f246
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "sands_game"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+minifb = "0.27"
+rand = "*"
+rand_chacha = "*"
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..7868ee3
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly-2024-07-27"
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..88a8a46
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,68 @@
+{ pkgs ? import <nixpkgs> { } }:
+
+pkgs.mkShell rec {
+  buildInputs = with pkgs; [
+    binutils
+    # linuxPackages.nvidia_x11
+    # libGLU
+    # libGL
+    freeglut
+    rustup
+    # opencv
+    clang
+    # zlib
+    udev
+  ];
+  nativeBuildInputs = with pkgs; [
+    pkg-config
+    fontconfig
+    alsaLib
+    # ffmpeg_7-full
+    stdenv.cc.cc.lib
+    xorg.libX11.dev
+    xorg.libXi
+    xorg.libXmu
+    xorg.libXext
+    xorg.libX11
+    xorg.libXv
+    xorg.libXrandr
+    xorg.libXcursor
+    libxkbcommon
+    vulkan-headers
+    vulkan-loader
+    vulkan-tools
+    vulkan-validation-layers
+    # onnxruntime
+  ];
+
+  extraCmds = '''';
+  RUSTC_VERSION = pkgs.lib.readFile ./rust-toolchain.toml;
+  # https://github.com/rust-lang/rust-bindgen#environment-variables
+  LIBCLANG_PATH =
+    pkgs.lib.makeLibraryPath [ pkgs.llvmPackages_latest.libclang.lib ];
+  LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath nativeBuildInputs;
+  shellHook = ''
+    export PATH=$PATH:''${CARGO_HOME:-~/.cargo}/bin
+    export PATH=$PATH:''${RUSTUP_HOME:-~/.rustup}/toolchains/$RUSTC_VERSION-x86_64-unknown-linux-gnu/bin/
+    # alias cargo="nix --extra-experimental-features \"nix-command flakes\" run --impure github:nix-community/nixGL -- cargo"
+  '';
+  # Add precompiled library to rustc search path
+  RUSTFLAGS = (builtins.map (a: "-L ${a}/lib") [
+    # add libraries here (e.g. pkgs.libvmi)
+  ]);
+  # Add glibc, clang, glib and other headers to bindgen search path
+  BINDGEN_EXTRA_CLANG_ARGS =
+    # Includes with normal include path
+    (builtins.map (a: ''-I"${a}/include"'') [
+      # add dev libraries here (e.g. pkgs.libvmi.dev)
+      pkgs.glibc.dev
+    ])
+    # Includes with special directory paths
+    ++ [
+      ''
+        -I"${pkgs.llvmPackages_latest.libclang.lib}/lib/clang/${pkgs.llvmPackages_latest.libclang.version}/include"''
+      ''-I"${pkgs.glib.dev}/include/glib-2.0"''
+      "-I${pkgs.glib.out}/lib/glib-2.0/include/"
+    ];
+
+}
diff --git a/src/engine.rs b/src/engine.rs
new file mode 100644
index 0000000..8135807
--- /dev/null
+++ b/src/engine.rs
@@ -0,0 +1,152 @@
+use std::io::Empty;
+
+use minifb::{Key, Window, WindowOptions};
+
+const WIDTH: usize = 800;
+const HEIGHT: usize = 600;
+
+use crate::{materials::*, rand::Random};
+
+pub struct Engine {
+    pub window: Window,
+    pub buffer: Vec<u32>,
+    pub brush_size: usize,
+    pub random: Random,
+}
+
+impl Engine {
+    pub fn new() -> Self {
+        Self {
+            window: Window::new(
+                "Rising Sands :P | Hit ESC to exit",
+                WIDTH,
+                HEIGHT,
+                WindowOptions::default(),
+            )
+            .unwrap_or_else(|e| {
+                panic!("{}", e);
+            }),
+            buffer: vec![0; WIDTH * HEIGHT],
+            brush_size: 1,
+            random: Random::new(0),
+        }
+    }
+
+    pub fn run(&mut self) {
+        self.clear();
+
+        self.window.set_target_fps(60);
+
+        while self.window.is_open() {
+            if self.window.is_key_down(Key::Escape) {
+                break;
+            }
+
+            if self.window.is_key_down(Key::Equal) {
+                self.brush_size = self.brush_size.saturating_add(1);
+            }
+            if self.window.is_key_down(Key::Minus) {
+                self.brush_size = self.brush_size.saturating_sub(1);
+            }
+
+            // TODO: something wrong here?
+            if self.window.get_mouse_down(minifb::MouseButton::Left) {
+                // TODO: Swap to mm::Discard and handle the mouse outside of the window
+                let pos = self.window.get_mouse_pos(minifb::MouseMode::Clamp).unwrap();
+                let half = self.brush_size / 2;
+
+                let mouse_x = pos.0 as usize - half;
+                let mouse_y = pos.1 as usize - half;
+
+                for x in 0..self.brush_size {
+                    for y in 0..self.brush_size {
+                        self.set_cell(mouse_x + x, mouse_y + y, SAND);
+                    }
+                }
+            }
+
+            if self.window.get_mouse_down(minifb::MouseButton::Right) {
+                // TODO: Swap to mm::Discard and handle the mouse outside of the window
+                let pos = self.window.get_mouse_pos(minifb::MouseMode::Clamp).unwrap();
+                let half = self.brush_size / 2;
+
+                let mouse_x = pos.0 as usize - half;
+                let mouse_y = pos.1 as usize - half;
+
+                for x in 0..self.brush_size {
+                    for y in 0..self.brush_size {
+                        self.set_cell(mouse_x + x, mouse_y + y, EMPTY);
+                    }
+                }
+            }
+
+            for x in 0..WIDTH {
+                for y in 0..HEIGHT {
+                    let index = xy_to_i(x, y);
+                    let cell = self.buffer[index];
+
+                    if cell == SAND {
+                        let down = self.is_empty(x, y + 1);
+                        let mut left = self.is_empty(x - 1, y + 1);
+                        let mut right = self.is_empty(x + 1, y + 1);
+
+                        if left && right {
+                            // TODO: handle left/right randomization here
+                            let rand = self.random.random_bool();
+                            left = rand;
+                            right = !rand;
+                        }
+
+                        if down {
+                            self.set_cell(x, y + 1, SAND)
+                        } else if left {
+                            self.set_cell(x - 1, y + 1, SAND)
+                        } else if right {
+                            self.set_cell(x + 1, y + 1, SAND)
+                        }
+
+                        if down || left || right {
+                            self.set_cell(x, y, EMPTY);
+                        }
+                    }
+                }
+            }
+            // TODO Handle this.
+            self.window
+                .update_with_buffer(&self.buffer, WIDTH, HEIGHT)
+                .unwrap();
+        }
+    }
+}
+
+impl Engine {
+    fn is_empty(&mut self, x: usize, y: usize) -> bool {
+        let index = xy_to_i(x, y);
+        if index >= self.buffer.len() {
+            false
+        } else {
+            self.buffer[index] == EMPTY
+        }
+    }
+
+    fn set_cell(&mut self, x: usize, y: usize, mat: u32) {
+        let index = xy_to_i(x, y);
+        if index >= self.buffer.len() {
+        } else {
+            self.buffer[index] = mat;
+        }
+    }
+
+    fn clear(&mut self) {
+        for x in 0..WIDTH {
+            for y in 0..HEIGHT {
+                let index = xy_to_i(x, y);
+                self.buffer[index] = EMPTY;
+            }
+        }
+    }
+}
+
+pub fn xy_to_i(x: usize, y: usize) -> usize {
+    x + WIDTH * y
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..e29f2f7
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,8 @@
+mod engine;
+mod materials;
+mod rand;
+
+fn main() {
+    let mut engine = engine::Engine::new();
+    engine.run();
+}
diff --git a/src/materials.rs b/src/materials.rs
new file mode 100644
index 0000000..c893a6d
--- /dev/null
+++ b/src/materials.rs
@@ -0,0 +1,2 @@
+pub const EMPTY: u32 = 0x00_00_00;
+pub const SAND: u32 = 0xFF_99_50;
diff --git a/src/rand.rs b/src/rand.rs
new file mode 100644
index 0000000..d3664ca
--- /dev/null
+++ b/src/rand.rs
@@ -0,0 +1,21 @@
+use rand::prelude::*;
+use rand_chacha::ChaCha20Rng;
+
+// Seeded random number generation.
+pub struct Random {
+    seed: u64,
+    rng: ChaCha20Rng,
+}
+
+impl Random {
+    pub fn new(seed: u64) -> Self {
+        Self {
+            seed,
+            rng: ChaCha20Rng::from_entropy(),
+        }
+    }
+
+    pub fn random_bool(&mut self) -> bool {
+        self.rng.gen_bool(0.5)
+    }
+}