feat: grid: use hardcoded indices

2 files changed, 8 insertions, 2 deletions

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