From e3de98c8ee8a5ace29b8c3673358e9abfbdbdd1f Mon Sep 17 00:00:00 2001
From: omniscient <17525998+omnisci3nce@users.noreply.github.com>
Date: Wed, 31 Jul 2024 10:48:51 +1000
Subject: feat: grid: use hardcoded indices

---
 assets/shaders/grid.frag | 2 +-
 assets/shaders/grid.vert | 8 +++++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

(limited to 'assets/shaders')

diff --git a/assets/shaders/grid.frag b/assets/shaders/grid.frag
index 5bce13b..06eebc3 100644
--- a/assets/shaders/grid.frag
+++ b/assets/shaders/grid.frag
@@ -3,5 +3,5 @@
 out vec4 FragColor;
 
 void main() {
-    FragColor = vec4(1.0);
+    FragColor = vec4(1.0, 0.0, 0.0, 1.0);
 }
\ No newline at end of file
diff --git a/assets/shaders/grid.vert b/assets/shaders/grid.vert
index a98eabe..bdfa477 100644
--- a/assets/shaders/grid.vert
+++ b/assets/shaders/grid.vert
@@ -6,6 +6,12 @@ uniform Camera {
   vec4 viewPos;
 } cam;
 
+// Grid position are in xy clipped space
+vec3 gridPlane[6] = vec3[](
+    vec3(1, 1, 0), vec3(-1, -1, 0), vec3(-1, 1, 0),
+    vec3(-1, -1, 0), vec3(1, 1, 0), vec3(1, -1, 0)
+);
+// normal vertice projection
 void main() {
-  gl_Position =  vec4(1.0);
+    gl_Position = cam.proj * cam.view * vec4(gridPlane[gl_VertexID].xyz, 1.0);
 }
\ No newline at end of file
-- 
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