Add RayTracing module

tmp

@@ -0,0 +49,4 @@
+  }
+
+  data_.distance = scene->eevee.gtao_distance;
+  data_.factor = std::max(1e-4f, scene->eevee.gtao_factor);

@@ -0,0 +51,4 @@
+  data_.distance = scene->eevee.gtao_distance;
+  data_.factor = std::max(1e-4f, scene->eevee.gtao_factor);
+  data_.quality = scene->eevee.gtao_quality;
+  data_.use_bent_normals = scene->eevee.flag & SCE_EEVEE_GTAO_BENT_NORMALS;

@@ -0,0 +52,4 @@
+  data_.factor = std::max(1e-4f, scene->eevee.gtao_factor);
+  data_.quality = scene->eevee.gtao_quality;
+  data_.use_bent_normals = scene->eevee.flag & SCE_EEVEE_GTAO_BENT_NORMALS;
+  data_.bounce_factor = (scene->eevee.flag & SCE_EEVEE_GTAO_BOUNCE) ? 1.0f : 0.0f;

@@ -148,0 +157,4 @@
+    def draw_header(self, context):
+        scene = context.scene
+        props = scene.eevee
+        self.layout.prop(props, "use_gtao", text="")

@@ -0,0 +63,4 @@
+    return;
+  }
+
+  horizons_search_ps_.init();

@@ -243,0 +248,4 @@
+      ELEM(pipeline_type, MAT_PIPE_FORWARD, MAT_PIPE_DEFERRED) &&
+      ELEM(geometry_type, MAT_GEOM_MESH, MAT_GEOM_CURVES))
+  {
+    info.define("MAT_AO");

@@ -889,0 +912,4 @@
+/** \name Ambient Occlussion
+ * \{ */
+
+struct AOData {

@@ -0,0 +4,4 @@
+#pragma BLENDER_REQUIRE(eevee_sampling_lib.glsl)
+#pragma BLENDER_REQUIRE(eevee_raytrace_lib.glsl)
+
+/* TODO(Miguel Pozo): Move somewhere else. */

@@ -0,0 +25,4 @@
+ * http://blog.selfshadow.com/publications/s2016-shading-course/activision/s2016_pbs_activision_occlusion.pptx
+ */
+
+#define NO_OCCLUSION_DATA OcclusionData(vec4(M_PI, -M_PI, M_PI, -M_PI), 1.0)

@@ -0,0 +38,4 @@
+#ifdef GPU_METAL
+  /* Constructors required for OcclusionData(..) syntax. */
+  inline OcclusionData() = default;
+  inline OcclusionData(vec4 in_horizons, float in_custom_occlusion)

@@ -0,0 +397,4 @@
+  /* Visibility to cone angle (eq. 18). */
+  float vis_angle = fast_acos(sqrt(1 - visibility));
+  /* Roughness to cone angle (eq. 26). */
+  float spec_angle = max(0.00990998744964599609375, fast_acos(cone_cosine(roughness)));

@@ -0,0 +78,4 @@
+  vec3 Ng = transform_direction(ViewMatrixInverse, vNg);
+  vec3 N = imageLoad(in_normal_img, texel).xyz;
+
+  // OcclusionData data = unpack_occlusion_data(texelFetch(horizons_tx, texel, 0));

@@ -88,3 +89,3 @@
       imageStore(rp_value_img, ivec3(texel, rp_buf.shadow_id), vec4(shadow));
     }
-    /* TODO: AO. */
+    /** NOTE: AO is done on its own pass. */

@@ -10,6 +10,7 @@
 #pragma BLENDER_REQUIRE(common_view_lib.glsl)
 #pragma BLENDER_REQUIRE(common_math_lib.glsl)
 #pragma BLENDER_REQUIRE(common_hair_lib.glsl)
+#pragma BLENDER_REQUIRE(eevee_ao_lib.glsl)

@@ -0,0 +49,4 @@
+
+  template<typename T> void bind_resources(draw::detail::PassBase<T> *pass)
+  {
+    inst_.sampling.bind_resources(pass);

@@ -0,0 +188,4 @@
+  return hit;
+}
+
+#if 0