From b58c29c734978766db2c86acb436ca9425491b99 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Mon, 17 Oct 2022 16:57:07 +0200
Subject: naive renderer

---
 src/main.rs | 31 ++++++++++++++++++-------------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 609041b..5f4e621 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -11,7 +11,7 @@ use image::ImageBuffer;
 use log::debug;
 use std::{collections::HashMap, fs::File, path::Path};
 
-const SEG_SIZE: isize = 64;
+const SEG_SIZE: isize = 128;
 
 fn main() {
     env_logger::builder()
@@ -27,21 +27,25 @@ fn main() {
         for y in -64..256 {
             for z in 0..SEG_SIZE {
                 let solid = |x: isize, y: isize, z: isize| {
-                    if x >= 0 && z >= 0 && x < SEG_SIZE && z < SEG_SIZE && y >= -64 && y < 256 {
-                        dim.block(x, y, z)
-                            .map(|b| {
-                                !matches!(
-                                    b.name(),
-                                    "minecraft:air" | "minecraft:water" | "minecraft:cave_air"
-                                )
-                            })
-                            .unwrap_or(false)
-                    } else {
-                        false
-                    }
+                    dim.block(x, y, z)
+                        .map(|b| {
+                            !matches!(
+                                b.name(),
+                                "minecraft:air" | "minecraft:water" | "minecraft:cave_air"
+                            )
+                        })
+                        .unwrap_or(false)
                 };
                 let visible =
                     |b: &Block| !matches!(b.name(), "minecraft:air" | "minecraft:cave_air");
+                let ray_visible = || {
+                    for i in 1..100 {
+                        if solid(x - i, y + i, z - i) {
+                            return false;
+                        }
+                    }
+                    true
+                };
 
                 if visible(&dim.block(x, y, z).unwrap())
                     && !(solid(x + 1, y, z)
@@ -50,6 +54,7 @@ fn main() {
                         && solid(x, y - 1, z)
                         && solid(x, y, z + 1)
                         && solid(x, y, z - 1))
+                    && ray_visible()
                 {
                     visible_blocks.push((x, y, z))
                 }
-- 
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