multisampled random rays

src/node_panel_grid.cpp

@@ -133,8 +133,9 @@ void NodePanelGrid::init_controls()
         m_groud_opacity->set_value(0);
         gl.restore();
     };
-    m_texture.create(2048, 2048);
-    m_sampler_linear.create(GL_NEAREST);
+    m_texture.create(1024, 1024);
+    m_sampler_linear.create();
+    m_sampler_linear.set_filter(GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR);
     m_sphere.create<8, 8>(.0001f);
 }
 
@@ -297,35 +298,34 @@ void NodePanelGrid::bake_uvs()
             auto pos = glm::make_vec3(&data_pos[i * 4]);
             auto& out = *reinterpret_cast<glm::i8vec4*>(&data_out[i * 4]);
 
-            if (glm::dot(nor, light_dir) <= 0.f)
-            {
-                out = { 50, 50, 50, 255 };
-                continue;
-            }
+//             if (glm::dot(nor, light_dir) <= 0.f)
+//             {
+//                 out = { 50, 50, 50, 255 };
+//                 continue;
+//             }
 
-            nanort::Ray<float> ray;
-            ray.org[0] = pos.x;// + nor.x * 0.005;
-            ray.org[1] = pos.y;// + nor.y * 0.005;
-            ray.org[2] = pos.z;// + nor.z * 0.005;
-            ray.dir[0] = light_dir.x;
-            ray.dir[1] = light_dir.y;
-            ray.dir[2] = light_dir.z;
-
-            float kFar = 20.0;
-            ray.min_t = 0.01f;
-            ray.max_t = kFar;
-
-            nanort::TriangleIntersector<> triangle_intersector(reinterpret_cast<float*>(m_hm_plane.vertices.data()), m_hm_plane.idx.data(), sizeof(vertex_t));
-            nanort::TriangleIntersection<> isect;
-            bool hit = m_rt_accel.Traverse(ray, triangle_intersector, &isect);
-            if (hit) 
+            int hit = 0;
+            for (int s = 0; s < 16; s++)
             {
-                out = { 50, 50, 50, 255 };
-            }
-            else
-            {
-                out = { 255, 255, 255, 255 };
+                auto dir = glm::normalize(light_dir + glm::sphericalRand(.1f));
+
+                nanort::Ray<float> ray;
+                ray.org[0] = pos.x;// + nor.x * 0.005;
+                ray.org[1] = pos.y;// + nor.y * 0.005;
+                ray.org[2] = pos.z;// + nor.z * 0.005;
+                ray.dir[0] = dir.x;
+                ray.dir[1] = dir.y;
+                ray.dir[2] = dir.z;
+
+                float kFar = 2000.0;
+                ray.min_t = 0.005f;
+                ray.max_t = kFar;
+
+                nanort::TriangleIntersector<> triangle_intersector(reinterpret_cast<float*>(m_hm_plane.vertices.data()), m_hm_plane.idx.data(), sizeof(vertex_t));
+                nanort::TriangleIntersection<> isect;
+                hit += m_rt_accel.Traverse(ray, triangle_intersector, &isect);
             }
+            out = glm::lerp(glm::vec4(255, 255, 255, 255), glm::vec4(50, 50, 50, 255), hit / 16.f);
         }
     }
 #if _WIN32 || __IOS__ || __OSX__
@@ -333,4 +333,5 @@ void NodePanelGrid::bake_uvs()
 #endif
     //stbi_write_jpg("bake-out.jpg", fb.getWidth(), fb.getHeight(), 4, data_out.get(), 75);
     m_texture.update(data_out.get());
+    m_texture.create_mipmaps();
 }