source/blender/draw/engines/eevee_next/eevee_gi.cc

@@ -17,8 +17,8 @@ void GI::generate_random_surfels()
 
   for (Surfel &surfel : surfels) {
     float3 random = rng.get_unit_float3();
-    surfel.position = float4(random * 3.0f);
-    surfel.normal = float4(random);
+    surfel.position = random * 3.0f;
+    surfel.normal = random;
     surfel.color = float4(rng.get_float(), rng.get_float(), rng.get_float(), 1.0f);
   }
 

source/blender/draw/engines/eevee_next/eevee_shader_shared.hh

@@ -831,8 +831,10 @@ static inline ShadowTileDataPacked shadow_tile_pack(ShadowTileData tile)
  * \{ */
 
 struct Surfel {
-  float4 position;
-  float4 normal;
+  float3 position;
+  int _pad0;
+  float3 normal;
+  int _pad1;
   float4 color;
 };
 BLI_STATIC_ASSERT_ALIGN(Surfel, 16)

source/blender/draw/engines/eevee_next/shaders/eevee_gi_debug_surfels_frag.glsl

@@ -5,7 +5,7 @@ void main()
   out_color = surfel.color;
 
   /* Display surfels as circles. */
-  if (distance(P, surfel.position.xyz) > surfel_radius) {
+  if (distance(P, surfel.position) > surfel_radius) {
     discard;
     return;
   }

source/blender/draw/engines/eevee_next/shaders/eevee_gi_debug_surfels_vert.glsl

@@ -9,14 +9,14 @@ void main()
   const vec3 verts[4] = vec3[4](vec3(-1, 1, 0), vec3(-1, -1, 0), vec3(1, 1, 0), vec3(1, -1, 0));
   vec3 lP = verts[gl_VertexID];
 
-  vec3 N = surfel.normal.xyz;
+  vec3 N = surfel.normal;
   vec3 T, B;
   make_orthonormal_basis(N, T, B);
 
   mat4 model_matrix = mat4(vec4(T * surfel_radius, 0),
                            vec4(B * surfel_radius, 0),
                            vec4(N * surfel_radius, 0),
-                           vec4(surfel.position.xyz, 1));
+                           vec4(surfel.position, 1));
 
   P = (model_matrix * vec4(lP, 1)).xyz;