From a3f0be461be29d7a06db2d8e49f508d42a7b6d4c Mon Sep 17 00:00:00 2001
From: Abdelrahman <said.abdelrahman89@gmail.com>
Date: Sat, 17 Aug 2024 20:27:58 +0100
Subject: [PATCH] Switch to calculating z buffer from viewport vertices

---
 src/obj.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/obj.c b/src/obj.c
index 049a80d..d26fb61 100644
--- a/src/obj.c
+++ b/src/obj.c
@@ -347,8 +347,7 @@ internal void fill_triangle(Render *render, V3f vertices[TRIANGLE_VERTICES],
       }
 
       z = 0.0f;
-      z += vertices[0].z * coords.x + vertices[1].z * coords.y +
-           vertices[2].z * coords.z;
+      z += v0.z * coords.x + v1.z * coords.y + v2.z * coords.z;
       zbuf = get_pixel(f32, &(render->depth), x, y);
 
       if (z > zbuf) {