From 75a9c87b50cef2f1d749bd9042a9348bc28b4c09 Mon Sep 17 00:00:00 2001
From: Mel <einebeere@gmail.com>
Date: Sun, 23 Oct 2022 02:48:51 +0200
Subject: Sun lighting

---
 src/World/Chunk.cpp | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

(limited to 'src/World/Chunk.cpp')

diff --git a/src/World/Chunk.cpp b/src/World/Chunk.cpp
index d02e5e5..ee408ae 100644
--- a/src/World/Chunk.cpp
+++ b/src/World/Chunk.cpp
@@ -9,6 +9,7 @@ void Chunk::set(uint32_t x, uint32_t y, uint32_t z, BlockType type) {
 
 GFX::Mesh Chunk::mesh() {
     std::vector<Vector<3>> positions{};
+    std::vector<Vector<3>> normals{};
     std::vector<Vector<2>> tex_coords{};
     std::vector<uint32_t> indices{};
 
@@ -25,8 +26,9 @@ GFX::Mesh Chunk::mesh() {
                         continue;
                     }
 
-                    auto side_tex_coords = Chunk::face_tex_coords(type, side);
                     auto side_positions = side.face();
+                    auto side_normals = Chunk::face_normals(side);
+                    auto side_tex_coords = Chunk::face_tex_coords(type, side);
 
                     for (auto& position : side_positions) {
                         position = position + Vector<3>{static_cast<float>(x), static_cast<float>(y), static_cast<float>(z)};
@@ -35,6 +37,7 @@ GFX::Mesh Chunk::mesh() {
                     uint32_t s = positions.size();
 
                     positions.insert(positions.end(), side_positions.begin(), side_positions.end());
+                    normals.insert(normals.end(), side_normals.begin(), side_normals.end());
                     tex_coords.insert(tex_coords.end(), side_tex_coords.begin(), side_tex_coords.end());
                     indices.insert(indices.end(), {s, s + 1, s + 3, s + 1, s + 2, s + 3});
                 }
@@ -42,7 +45,7 @@ GFX::Mesh Chunk::mesh() {
         }
     }
 
-    return {positions, tex_coords, indices};
+    return {positions, normals, tex_coords, indices};
 }
 
 Vector<3> Chunk::position() {
@@ -121,4 +124,16 @@ std::array<Vector<2>, 4> Chunk::face_tex_coords(BlockType type, BlockSide side)
     }
 }
 
+std::array<Vector<3>, 4> Chunk::face_normals(BlockSide side) {
+    auto is_side = [=](BlockSide s) -> float { return s == side; };
+
+    Vector<3> normal = {
+            is_side(BlockSide::Right) - is_side(BlockSide::Left),
+            is_side(BlockSide::Top) - is_side(BlockSide::Bottom),
+            is_side(BlockSide::Front) - is_side(BlockSide::Back),
+    };
+
+    return {normal, normal, normal, normal};
+}
+
 }
-- 
cgit 1.4.1