fixed reprojection of spec GI

assets/core_assets/shader/gi_sample_spec.frag

@@ -108,12 +108,12 @@ void main() {
 	float max_distance = min(32, 4 / (tan(coneTheta)*2));
 	float max_steps = max_distance*8;
 
-	vec3 jitter = PDnrand3(vertex_out.tex_coords);
+	vec3 jitter = PDnrand3(vertex_out.tex_coords + global_uniforms.time.x);
 
 	vec2 raycast_hit_uv;
 	vec3 raycast_hit_point;
 	if(spec_visible &&
-	   traceScreenSpaceRay1(P+dir*0.25, dir, pcs.projection, depth_sampler,
+	   traceScreenSpaceRay1(P+(dir*0.25+jitter*0.1), dir, pcs.projection, depth_sampler,
 							depthSize, 1.0, global_uniforms.proj_planes.x,
 							10, 0.5*jitter.z, max_steps, max_distance, int(startLod + 0.5),
 							raycast_hit_uv, raycast_hit_point)) {
@@ -136,7 +136,7 @@ void main() {
 		out_color.rgb /= (1 + luminance_norm(out_color.rgb));
 
 	} else {
-		out_color.rgb = textureLod(diffuse_sampler, vertex_out.tex_coords, pcs.prev_projection[0][3]).rgb / (PI*PI*4);
+		out_color.rgb = textureLod(diffuse_sampler, vertex_out.tex_coords, pcs.prev_projection[0][3]).rgb / (PI*PI*2);
 	}
 
 	float history_weight = texelFetch(history_weight_sampler,

assets/core_assets/shader/gi_spec_blur.frag

@@ -38,5 +38,5 @@ void main() {
 
 	color_out = vec4(result / weight_sum, 1.0);
 
-//	color_out.rgb = read(vertex_out.uv_center, center_depth, weight_sum, 1.0).rgb;
+	color_out.rgb = mix(color_out.rgb, read(vertex_out.uv_center, center_depth, weight_sum, 1.0).rgb, 0.5);
 }

src/mirrage/renderer/src/pass/gi_pass.cpp

@@ -727,7 +727,7 @@ namespace mirrage::renderer {
 	                                               _min_mip_level,
 	                                               _color_diffuse_in,
 	                                               _gi_diffuse_history,
-	                                               _gi_specular_history,
+	                                               _gi_specular,
 	                                               _history_weight,
 	                                               _reproject_framebuffer))
 	  , _reproject_descriptor_set(_descriptor_set_layout.create_set(renderer.descriptor_pool(),
@@ -735,7 +735,7 @@ namespace mirrage::renderer {
 	                                                                 renderer.gbuffer().mat_data.view(),
 	                                                                 renderer.gbuffer().albedo_mat_id.view(0),
 	                                                                 _gi_diffuse_result.view(),
-	                                                                 _gi_specular.view(),
+	                                                                 _gi_specular_history.view(),
 	                                                                 renderer.gbuffer().prev_depth.view(),
 	                                                                 _integrated_brdf.view(),
 	                                                                 _history_weight_prev.view()}))
@@ -892,6 +892,14 @@ namespace mirrage::renderer {
 		                      _history_weight_prev,
 		                      vk::ImageLayout::eUndefined,
 		                      vk::ImageLayout::eShaderReadOnlyOptimal);
+
+		graphic::blit_texture(command_buffer,
+		                      _gi_specular,
+		                      vk::ImageLayout::eShaderReadOnlyOptimal,
+		                      vk::ImageLayout::eShaderReadOnlyOptimal,
+		                      _gi_specular_history,
+		                      vk::ImageLayout::eUndefined,
+		                      vk::ImageLayout::eShaderReadOnlyOptimal);
 	}
 
 	void Gi_pass::_integrate_brdf(vk::CommandBuffer& command_buffer) {