1 files changed, 62 insertions, 0 deletions
diff --git a/source/blender/draw/engines/eevee_next/shaders/eevee_light_culling_select_comp.glsl b/source/blender/draw/engines/eevee_next/shaders/eevee_light_culling_select_comp.glsl
new file mode 100644
index 00000000000..9c12b0e50e6
--- /dev/null
+++ b/source/blender/draw/engines/eevee_next/shaders/eevee_light_culling_select_comp.glsl
@@ -0,0 +1,62 @@
+
+/**
+ * Select the visible items inside the active view and put them inside the sorting buffer.
+ */
+
+#pragma BLENDER_REQUIRE(common_view_lib.glsl)
+#pragma BLENDER_REQUIRE(common_math_geom_lib.glsl)
+#pragma BLENDER_REQUIRE(common_intersect_lib.glsl)
+
+void main()
+{
+  uint l_idx = gl_GlobalInvocationID.x;
+  if (l_idx >= light_cull_buf.items_count) {
+    return;
+  }
+
+  LightData light = in_light_buf[l_idx];
+
+  /* Do not select 0 power lights. */
+  if (light.influence_radius_max < 1e-8) {
+    return;
+  }
+
+  /* Sun lights are packed at the end of the array. Perform early copy. */
+  if (light.type == LIGHT_SUN) {
+    /* NOTE: We know the index because sun lights are packed at the start of the input buffer. */
+    out_light_buf[light_cull_buf.local_lights_len + l_idx] = light;
+    return;
+  }
+
+  Sphere sphere;
+  switch (light.type) {
+    case LIGHT_SPOT:
+      /* Only for < ~170° Cone due to plane extraction precision. */
+      if (light.spot_tan < 10.0) {
+        Pyramid pyramid = shape_pyramid_non_oblique(
+            light._position,
+            light._position - light._back * light.influence_radius_max,
+            light._right * light.influence_radius_max * light.spot_tan / light.spot_size_inv.x,
+            light._up * light.influence_radius_max * light.spot_tan / light.spot_size_inv.y);
+        if (!intersect_view(pyramid)) {
+          return;
+        }
+      }
+    case LIGHT_RECT:
+    case LIGHT_ELLIPSE:
+    case LIGHT_POINT:
+      sphere = Sphere(light._position, light.influence_radius_max);
+      break;
+  }
+
+  /* TODO(fclem): HiZ culling? Could be quite beneficial given the nature of the 2.5D culling. */
+
+  /* TODO(fclem): Small light culling / fading? */
+
+  if (intersect_view(sphere)) {
+    uint index = atomicAdd(light_cull_buf.visible_count, 1u);
+
+    out_zdist_buf[index] = dot(cameraForward, light._position) - dot(cameraForward, cameraPos);
+    out_key_buf[index] = l_idx;
+  }
+}