Add separate getRenderObjects function
This will make the functions clearer when shadow rendering is added.
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@ -20,106 +20,6 @@ using namespace ECS;
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class RenderSystem : public EntitySystem {
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public:
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void render(World *pWorld, Shader shader) {
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pWorld->each<Camera, Transform>([&](Entity *ent, ComponentHandle<Camera> camera, ComponentHandle<Transform> cameraTransform) {
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glClearColor(0.6f, 0.9f, 0.9f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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shader.use();
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// Lighting
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// TODO: Currently only the last light is used!
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pWorld->each<DirectionalLight>([&](Entity *ent, ComponentHandle<DirectionalLight> light) {
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shader.setVec3("lightDirection", light->direction);
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});
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glm::vec3 cameraPos = cameraTransform->get_origin();
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glm::mat4 view = cameraTransform->matrix;
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view[3] = glm::vec4(cameraPos, 1.0);
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shader.setMat4("projection", camera->projection);
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shader.setMat4("view", glm::inverse(view));
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shader.setVec3("cameraPosition", cameraTransform->get_origin());
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std::vector<RenderObject> renderObjects;
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std::vector<RenderObject> transparentRenderObjects;
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/*pWorld->each<Mesh, Transform>([&](Entity *ent, ComponentHandle<Mesh> mesh, ComponentHandle<Transform> transform) {
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renderObjects.emplace_back(RenderObject(transform->matrix, 0, mesh.get(), 0));
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});*/
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/*// TODO: Is it possible to do get ObjMeshes in the Mesh loop above implicitly via polymorphism?
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* // TODO: Commented out because of double rendering - we only want to get objects that explicitly DON'T have a texture here!
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pWorld->each<ObjMesh, Transform>([&](Entity *ent, ComponentHandle<ObjMesh> mesh, ComponentHandle<Transform> transform) {
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// Add the object to the renderObjects to draw if the distance is within the min and max distance of the mesh
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float distance = glm::distance(cameraPos, transform->getPosition());
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if (distance > mesh->minDistance && distance < mesh->maxDistance) {
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renderObjects.emplace_back(RenderObject(transform->matrix, 0, mesh.get(), distance));
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}
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});*/
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// ObjMesh with textures
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pWorld->each<ObjMesh, Transform, Texture>([&](Entity *ent, ComponentHandle<ObjMesh> mesh, ComponentHandle<Transform> transform, ComponentHandle<Texture> texture) {
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// Add the object to the renderObjects to draw if the distance is within the min and max distance of the mesh
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float distance = glm::distance(cameraPos, transform->get_origin());
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if (distance > mesh->minDistance && distance < mesh->maxDistance) {
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// Get optional components
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ComponentHandle<Texture> textureComponent = ent->get<Texture>();
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ComponentHandle<Material> materialComponent = ent->get<Material>();
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Material material = materialComponent.isValid() ? materialComponent.get() : Material();
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unsigned int textureID = textureComponent.isValid() ? textureComponent->id : 0;
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// Put it into the list of transparent render objects if the texture wants to be rendered transparently
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if (textureComponent.isValid() && textureComponent->render_transparent) {
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transparentRenderObjects.emplace_back(RenderObject(transform->matrix, transform->get_origin(), textureID, mesh.get(), distance, material));
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} else {
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renderObjects.emplace_back(RenderObject(transform->matrix, transform->get_origin(), textureID, mesh.get(), distance, material));
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}
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}
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});
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// LODObjMesh with Texture
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pWorld->each<LODObjMesh, Transform>([&](Entity *ent, ComponentHandle<LODObjMesh> lodMesh, ComponentHandle<Transform> transform) {
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float distance = glm::distance(cameraPos, transform->get_origin());
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for (const auto &mesh : lodMesh->meshes) {
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if (distance > mesh.minDistance && distance < mesh.maxDistance) {
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// Get optional components
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ComponentHandle<Texture> textureComponent = ent->get<Texture>();
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ComponentHandle<Material> materialComponent = ent->get<Material>();
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Material material = materialComponent.isValid() ? materialComponent.get() : Material();
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unsigned int textureID = textureComponent.isValid() ? textureComponent->id : 0;
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// Put it into the list of transparent render objects if the texture wants to be rendered transparently
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if (textureComponent.isValid() && textureComponent->render_transparent) {
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transparentRenderObjects.emplace_back(RenderObject(transform->matrix, transform->get_origin(), textureID, mesh, distance, material));
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} else {
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renderObjects.emplace_back(RenderObject(transform->matrix, transform->get_origin(), textureID, mesh, distance, material));
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}
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}
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}
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});
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for (const RenderObject &obj : renderObjects) {
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obj.render(shader);
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}
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// Sort transparent objects and render them
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std::sort(transparentRenderObjects.begin(), transparentRenderObjects.end(), [](const RenderObject &first, const RenderObject &second) -> bool {
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return first.distance > second.distance;
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});
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for (const RenderObject &obj : transparentRenderObjects) {
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obj.render(shader);
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}
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});
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}
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struct RenderObject {
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RenderObject(const glm::mat4 &matrix, const glm::vec3 &origin, unsigned int textureId, const Mesh &mesh, float distance, const Material &material)
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: matrix(matrix),
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@ -152,6 +52,113 @@ public:
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float distance;
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Material material;
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};
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// Fill the passed vector with render objects of the given world
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std::vector<std::vector<RenderObject>> getRenderObjects(World *world, glm::vec3 cameraPos) {
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std::vector<std::vector<RenderObject>> renderObjects(2); // First normal, then transparent
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/*pWorld->each<Mesh, Transform>([&](Entity *ent, ComponentHandle<Mesh> mesh, ComponentHandle<Transform> transform) {
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renderObjects.emplace_back(RenderObject(transform->matrix, 0, mesh.get(), 0));
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});*/
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/*// TODO: Is it possible to do get ObjMeshes in the Mesh loop above implicitly via polymorphism?
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* // TODO: Commented out because of double rendering - we only want to get objects that explicitly DON'T have a texture here!
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pWorld->each<ObjMesh, Transform>([&](Entity *ent, ComponentHandle<ObjMesh> mesh, ComponentHandle<Transform> transform) {
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// Add the object to the renderObjects to draw if the distance is within the min and max distance of the mesh
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float distance = glm::distance(cameraPos, transform->getPosition());
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if (distance > mesh->minDistance && distance < mesh->maxDistance) {
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renderObjects.emplace_back(RenderObject(transform->matrix, 0, mesh.get(), distance));
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}
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});*/
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// ObjMesh with textures
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world->each<ObjMesh, Transform, Texture>([&](Entity *ent, ComponentHandle<ObjMesh> mesh, ComponentHandle<Transform> transform, ComponentHandle<Texture> texture) {
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// Add the object to the renderObjects to draw if the distance is within the min and max distance of the mesh
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float distance = glm::distance(cameraPos, transform->get_origin());
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if (distance > mesh->minDistance && distance < mesh->maxDistance) {
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// Get optional components
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ComponentHandle<Texture> textureComponent = ent->get<Texture>();
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ComponentHandle<Material> materialComponent = ent->get<Material>();
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Material material = materialComponent.isValid() ? materialComponent.get() : Material();
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unsigned int textureID = textureComponent.isValid() ? textureComponent->id : 0;
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// Put it into the list of transparent render objects if the texture wants to be rendered transparently
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if (textureComponent.isValid() && textureComponent->render_transparent) {
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renderObjects[1].emplace_back(RenderObject(transform->matrix, transform->get_origin(), textureID, mesh.get(), distance, material));
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} else {
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renderObjects[0].emplace_back(RenderObject(transform->matrix, transform->get_origin(), textureID, mesh.get(), distance, material));
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}
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}
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});
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// LODObjMesh with Texture
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world->each<LODObjMesh, Transform>([&](Entity *ent, ComponentHandle<LODObjMesh> lodMesh, ComponentHandle<Transform> transform) {
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float distance = glm::distance(cameraPos, transform->get_origin());
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for (const auto &mesh : lodMesh->meshes) {
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if (distance > mesh.minDistance && distance < mesh.maxDistance) {
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// Get optional components
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ComponentHandle<Texture> textureComponent = ent->get<Texture>();
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ComponentHandle<Material> materialComponent = ent->get<Material>();
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Material material = materialComponent.isValid() ? materialComponent.get() : Material();
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unsigned int textureID = textureComponent.isValid() ? textureComponent->id : 0;
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// Put it into the list of transparent render objects if the texture wants to be rendered transparently
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if (textureComponent.isValid() && textureComponent->render_transparent) {
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renderObjects[1].emplace_back(RenderObject(transform->matrix, transform->get_origin(), textureID, mesh, distance, material));
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} else {
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renderObjects[0].emplace_back(RenderObject(transform->matrix, transform->get_origin(), textureID, mesh, distance, material));
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}
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}
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}
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});
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// Sort transparent objects
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std::sort(renderObjects[1].begin(), renderObjects[1].end(), [](const RenderObject &first, const RenderObject &second) -> bool {
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return first.distance > second.distance;
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});
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return renderObjects;
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}
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void render(World *pWorld, Shader shader) {
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pWorld->each<Camera, Transform>([&](Entity *ent, ComponentHandle<Camera> camera, ComponentHandle<Transform> cameraTransform) {
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glClearColor(0.6f, 0.9f, 0.9f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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shader.use();
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// Lighting
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// TODO: Currently only the last light is used!
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pWorld->each<DirectionalLight>([&](Entity *ent, ComponentHandle<DirectionalLight> light) {
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shader.setVec3("lightDirection", light->direction);
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});
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glm::vec3 cameraPos = cameraTransform->get_origin();
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glm::mat4 view = cameraTransform->matrix;
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view[3] = glm::vec4(cameraPos, 1.0);
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shader.setMat4("projection", camera->projection);
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shader.setMat4("view", glm::inverse(view));
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shader.setVec3("cameraPosition", cameraTransform->get_origin());
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std::vector<std::vector<RenderObject>> allRenderObjects = getRenderObjects(pWorld, cameraPos);
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std::vector<RenderObject> renderObjects = allRenderObjects[0];
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std::vector<RenderObject> transparentRenderObjects = allRenderObjects[1];
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for (const RenderObject &obj : renderObjects) {
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obj.render(shader);
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}
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for (const RenderObject &obj : transparentRenderObjects) {
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obj.render(shader);
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}
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});
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}
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};
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#endif //ECSGAME_RENDERSYSTEM_H
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