Added support of multiple meshes per object

dorosch · Sep 18, 2022 · c5b8144 · c5b8144
1 parent d59331f
commit c5b8144
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Showing 4 changed files with 22 additions and 15 deletions.
diff --git a/include/core/ecs/entity.hpp b/include/core/ecs/entity.hpp
@@ -3,6 +3,7 @@
 
 #include <memory>
 #include <string>
+#include <vector>
 
 #include "core/ecs/component.hpp"
 
@@ -14,7 +15,7 @@ namespace Engine {
             std::string name;
             std::unique_ptr<Component::Transform> transform = std::make_unique<Component::Transform>();
             std::unique_ptr<Component::Material> material;
-            std::unique_ptr<Component::Mesh> mesh;
+            std::vector<std::unique_ptr<Component::Mesh>> meshes;
             std::unique_ptr<Component::Light> light;
             std::unique_ptr<Component::Camera> camera;
 
@@ -28,7 +29,7 @@ namespace Engine {
                     case Component::Type::MATERIAL:
                         return material != nullptr;
                     case Component::Type::MESH:
-                        return mesh != nullptr;
+                        return meshes.size() > 0;
                     case Component::Type::LIGHT:
                         return light != nullptr;
                     case Component::Type::CAMERA:

diff --git a/include/core/geometry/primitives.hpp b/include/core/geometry/primitives.hpp
@@ -11,17 +11,16 @@ namespace Engine {
     namespace Geometry {
         class Primitive : public Object {
         public:
-            Primitive() : Object() {
-                mesh = std::make_unique<Ecs::Component::Mesh>();
-            }
+            Primitive() : Object() {};
         };
 
 
         class Plane : public Primitive {
         public:
             Plane() : Primitive() {
-                name = std::string("Plane");
+                std::unique_ptr<Ecs::Component::Mesh> mesh = std::make_unique<Ecs::Component::Mesh>();
 
+                name = std::string("Plane");
                 mesh->vertices = {
                    -0.5f,  0.5f,  0.0f,  0.0f,  0.0f, 1.0f,
                     0.5f,  0.5f,  0.0f,  0.0f,  0.0f, 1.0f,
@@ -31,15 +30,17 @@ namespace Engine {
                    -0.5f, -0.5f,  0.0f,  0.0f,  0.0f, 1.0f
                 };
                 mesh->Initialize();
+                meshes.push_back(std::move(mesh));
             }
         };
 
 
         class Cube : public Primitive {
         public:
             Cube() : Primitive() {
-                name = std::string("Cube");
+                std::unique_ptr<Ecs::Component::Mesh> mesh = std::make_unique<Ecs::Component::Mesh>();
 
+                name = std::string("Cube");
                 mesh->vertices = {
                    -0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
                     0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
@@ -84,6 +85,7 @@ namespace Engine {
                    -0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f
                 };
                 mesh->Initialize();
+                meshes.push_back(std::move(mesh));
             }
         };
     }

diff --git a/src/core/render/api.cpp b/src/core/render/api.cpp
@@ -135,10 +135,12 @@ void Render::RenderScene(const Engine::Scene::Scene *scene) {
                 shader->UniformFloat("material.shininess", object->material->shininess);
             }
 
-            object->mesh->VAO->bind();
-            // TODO: Add calculation of the number of lines to the mesh method
-            glDrawArrays(GL_TRIANGLES, 0, object->mesh->vertices.size() / 6);
-            object->mesh->VAO->unbind();
+            for (auto const &mesh : object->meshes) {
+                mesh->VAO->bind();
+                // TODO: Add calculation of the number of lines to the mesh method
+                glDrawArrays(GL_TRIANGLES, 0, mesh->vertices.size() / 6);
+                mesh->VAO->unbind();
+            }
         }
     }
 
@@ -154,9 +156,11 @@ void Render::RenderScene(const Engine::Scene::Scene *scene) {
         lightingShader->UniformMatrix("projection", projection);
 
         // If the editor is enabled, then draw where the light source is
-        light->mesh->VAO->bind();
-        glDrawArrays(GL_TRIANGLES, 0, light->mesh->vertices.size() / 6);
-        light->mesh->VAO->unbind();
+        for (auto const &mesh : light->meshes) {
+            mesh->VAO->bind();
+            glDrawArrays(GL_TRIANGLES, 0, mesh->vertices.size() / 6);
+            mesh->VAO->unbind();
+        }
     }
 
     scene->environment->skybox->update(projection * view);

diff --git a/src/editor.cpp b/src/editor.cpp
@@ -162,7 +162,7 @@ namespace Engine {
 
                     if (selectedEntity->HasComponent(Ecs::Component::Type::MESH)) {
                         if (ImGui::CollapsingHeader("Mesh", ImGuiTreeNodeFlags_None)) {
-                            ImGui::Text("vertices: %ld", selectedEntity->mesh->vertices.size());
+                            ImGui::Text("meshes: %ld", selectedEntity->meshes.size());
                         }
                     }