From b1aa24ea3c259fd018dde8370ef45678c7ef00ec Mon Sep 17 00:00:00 2001
From: Juan Linietsky <reduzio@gmail.com>
Date: Sun, 28 Jun 2020 09:10:51 -0300
Subject: [PATCH] Slight occlusion improvements.

---
 .../rasterizer_rd/shaders/scene_high_end.glsl | 10 +-
 .../shaders/sdfgi_preprocess.glsl             | 99 -------------------
 2 files changed, 7 insertions(+), 102 deletions(-)

diff --git a/servers/rendering/rasterizer_rd/shaders/scene_high_end.glsl b/servers/rendering/rasterizer_rd/shaders/scene_high_end.glsl
index 9a94a7914e8..d6a56b25436 100644
--- a/servers/rendering/rasterizer_rd/shaders/scene_high_end.glsl
+++ b/servers/rendering/rasterizer_rd/shaders/scene_high_end.glsl
@@ -2519,11 +2519,15 @@ FRAGMENT_SHADER_CODE
 				vec3(0, -1, 0),
 				vec3(0, 0, -1));
 
-		vec3 cam_normal = mat3(scene_data.camera_matrix) * normal;
+		vec3 cam_normal = mat3(scene_data.camera_matrix) * normalize(normal_interp);
+
+		float closest_dist = -1e20;
 
 		for (uint i = 0; i < 6; i++) {
-			if (dot(cam_normal, aniso_dir[i]) > 0.001) {
-				facing_bits |= (1 << i);
+			float d = dot(cam_normal, aniso_dir[i]);
+			if (d > closest_dist) {
+				closest_dist = d;
+				facing_bits = (1 << i);
 			}
 		}
 
diff --git a/servers/rendering/rasterizer_rd/shaders/sdfgi_preprocess.glsl b/servers/rendering/rasterizer_rd/shaders/sdfgi_preprocess.glsl
index 7a523d3a3c5..d7d19897e31 100644
--- a/servers/rendering/rasterizer_rd/shaders/sdfgi_preprocess.glsl
+++ b/servers/rendering/rasterizer_rd/shaders/sdfgi_preprocess.glsl
@@ -655,105 +655,6 @@ void main() {
 		groupMemoryBarrier();
 		barrier();
 	}
-	/*
-		for(int s=0;s<8;s++) {
-			ivec3 local_pos = pos * 2 + ((ivec3(s) >> ivec3(2,1,0)) & ivec3(1,1,1));
-			for(int i=0;i<8;i++) {
-				ivec3 offset = local_pos + ((ivec3(i) >> ivec3(2,1,0)) & ivec3(1,1,1)) * OCCLUSION_SIZE;
-
-				ivec3 global_offset = region_offset + offset;
-
-				if (any(lessThan(global_offset,ivec3(0))) || any(greaterThanEqual(global_offset,ivec3(params.grid_size)))) {
-					continue; // do not process
-				}
-
-				ivec3 proc_pos = offset - ivec3(OCCLUSION_SIZE);
-				proc_pos += mix(ivec3(0),ivec3(1),greaterThanEqual(proc_pos,ivec3(0)));
-
-				ivec3 proc_abs = abs(proc_pos);
-				ivec3 proc_pass = proc_abs - ivec3(1);
-
-				if (proc_pass.x+proc_pass.y+proc_pass.z != step) {
-					continue;
-				}
-
-				offset = global_offset;
-
-				float occ;
-
-				uint facing = imageLoad(src_facing,offset).r; //any bit present in facing means this is solid
-
-				if (facing != 0) { //solid
-					occ = 0.0;
-				} else if (step==0) {
-					occ = 1.0; //first step
-				} else {
-					ivec3 read_dir = -sign(proc_pos);
-
-					ivec3 major_axis;
-					if (proc_pass.x < proc_pass.y) {
-						if (proc_pass.z < proc_pass.y) {
-							major_axis = ivec3(0,1,0);
-						} else {
-							major_axis = ivec3(0,0,1);
-						}
-					} else {
-						if (proc_pass.z < proc_pass.x) {
-							major_axis = ivec3(1,0,0);
-						} else {
-							major_axis = ivec3(0,0,1);
-						}
-					}
-
-					float avg = 0.0;
-					occ = 0.0;
-
-					ivec3 read_x = offset + ivec3(read_dir.x,0,0) + (proc_pass.x == 0 ? major_axis * read_dir : ivec3(0));
-					ivec3 read_y = offset + ivec3(0,read_dir.y,0) + (proc_pass.y == 0 ? major_axis * read_dir : ivec3(0));
-					ivec3 read_z = offset + ivec3(0,0,read_dir.z) + (proc_pass.z == 0 ? major_axis * read_dir : ivec3(0));
-
-					if (all(greaterThanEqual(read_x,ivec3(0))) && all(lessThan(read_x,ivec3(params.grid_size)))) {
-
-						uint f = imageLoad(src_facing,read_x).r;
-						if (f==0) { //non solid
-							occ += imageLoad(dst_occlusion[params.occlusion_index],read_x).r;
-							avg+=1.0;
-						}
-					}
-
-					if (all(greaterThanEqual(read_y,ivec3(0))) && all(lessThan(read_y,ivec3(params.grid_size)))) {
-
-						uint f = imageLoad(src_facing,read_y).r;
-						if (f==0) {//non solid
-							occ += imageLoad(dst_occlusion[params.occlusion_index],read_y).r;
-							avg+=1.0;
-						}
-					}
-
-					if (all(greaterThanEqual(read_z,ivec3(0))) && all(lessThan(read_z,ivec3(params.grid_size)))) {
-
-						uint f = imageLoad(src_facing,read_z).r;
-						if (f==0) {//non solid
-							occ += imageLoad(dst_occlusion[params.occlusion_index],read_z).r;
-							avg+=1.0;
-						}
-					}
-
-					if (avg > 0.0) {
-						occ/=avg;
-					}
-				}
-
-				imageStore(dst_occlusion[params.occlusion_index],offset,vec4(occ));
-
-			}
-		}
-
-		groupMemoryBarrier();
-		barrier();
-
-	}
-*/
 #if 1
 	//bias solid voxels away