From c694dfff8230e9565ab4ada67ea780283c80115a Mon Sep 17 00:00:00 2001
From: veclavtalica <veclavtalica@tutamail.com>
Date: Mon, 13 Jan 2025 09:18:51 +0300
Subject: [PATCH] use flatshading for space and skip setting irrelevant vertex
 color

---
 src/rendering/twn_billboards.c      | 6 +++---
 src/rendering/twn_gl_15_rendering.c | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/rendering/twn_billboards.c b/src/rendering/twn_billboards.c
index 3d4fa06..95b01c3 100644
--- a/src/rendering/twn_billboards.c
+++ b/src/rendering/twn_billboards.c
@@ -108,11 +108,11 @@ void finally_draw_billboard_batch(struct MeshBatch const *batch,
             }
 
             struct ElementIndexedBillboard const payload = {
-                /* TODO: use the flat shading to not set two of the colors */
+                /* flat shading is assumed, so we can skip setting the duplicates */
                 .c0 = billboard.color,
-                .c1 = billboard.color,
+                // .c1 = billboard.color,
                 .c2 = billboard.color,
-                .c3 = billboard.color,
+                // .c3 = billboard.color,
 
                 .uv0 = uv0,
                 .uv1 = uv1,
diff --git a/src/rendering/twn_gl_15_rendering.c b/src/rendering/twn_gl_15_rendering.c
index 9be0304..2e9207f 100644
--- a/src/rendering/twn_gl_15_rendering.c
+++ b/src/rendering/twn_gl_15_rendering.c
@@ -48,7 +48,7 @@ void finally_use_space_pipeline(void) {
 
         glNewList(list, GL_COMPILE); {
             glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
-            glShadeModel(GL_SMOOTH);
+            glShadeModel(GL_FLAT);
 
             if (GLAD_GL_ARB_depth_clamp)
                 glDisable(GL_DEPTH_CLAMP);