From 892be89728eca00704354435968230b92f94146d Mon Sep 17 00:00:00 2001
From: Riyyi <riyyi3@gmail.com>
Date: Sun, 25 Sep 2022 11:09:19 +0200
Subject: [PATCH] Scene: Load camera from JSON

---
 assets/scene/scene1.json    | 49 ++++++++++++++++++++++++++++++++++
 src/inferno/scene/scene.cpp | 52 +++++++++++++++++++++++++++++--------
 src/inferno/scene/scene.h   |  3 +++
 3 files changed, 93 insertions(+), 11 deletions(-)
 create mode 100644 assets/scene/scene1.json

diff --git a/assets/scene/scene1.json b/assets/scene/scene1.json
new file mode 100644
index 0000000..87c8738
--- /dev/null
+++ b/assets/scene/scene1.json
@@ -0,0 +1,49 @@
+{
+	"init": "assets/lua/scene1-init.lua",
+	"camera": {
+		"name": "Camera",
+		"translate": [ 0.0, 0.0, 1.0 ],
+		"rotate": [ 0.0, 0.0, -1.0 ],
+		"scale": [ 1.0, 1.0, 1.0 ],
+		"type": "perspective",
+		"script": {
+			"type": "lua",
+			"name": "assets/lua/cameracontroller.lua"
+		}
+	},
+	"quad": [
+		{
+			"name": "Quad",
+			"translate": [ 0.0, 0.0, 0.0 ],
+			"rotate": [ 0.0, 0.0, 0.0 ],
+			"scale": [ 1.0, 1.0, 1.0 ],
+			"color": [ 1.0, 1.0, 1.0, 1.0 ],
+			"texture": "assets/gfx/test.png"
+		},
+		{
+			"name": "Quad 2",
+			"translate": [ 1.1, 0.0, 0.0 ],
+			"rotate": [ 0.0, 0.0, 0.0 ],
+			"scale": [ 1.0, 1.0, 1.0 ],
+			"color": [ 0.5, 0.6, 0.8, 1.0 ],
+			"texture": "assets/gfx/test.png"
+		},
+		{
+			"name": "Quad 3",
+			"translate": [ 2.2, 0.0, 0.0 ],
+			"rotate": [ 0.0, 0.0, 0.0 ],
+			"scale": [ 1.0, 1.0, 1.0 ],
+			"color": [ 1.0, 1.0, 1.0, 1.0 ],
+			"texture": "assets/gfx/test-inverted.png"
+		}
+	],
+	"text": [
+		{
+			"content": "HelloWorld!",
+			"font": "assets/fnt/dejavu-sans",
+			"font-size": 0,
+			"width": 150,
+			"lines": 3
+		}
+	]
+}
diff --git a/src/inferno/scene/scene.cpp b/src/inferno/scene/scene.cpp
index 492a2ee..3f8baf0 100644
--- a/src/inferno/scene/scene.cpp
+++ b/src/inferno/scene/scene.cpp
@@ -4,7 +4,9 @@
  * SPDX-License-Identifier: MIT
  */
 
+#include "ruc/file.h"
 #include "ruc/format/log.h"
+#include "ruc/json/json.h"
 #include "ruc/meta/assert.h"
 
 #include "inferno/component/cameracomponent.h"
@@ -13,6 +15,7 @@
 #include "inferno/component/spritecomponent.h"
 #include "inferno/component/tagcomponent.h"
 #include "inferno/component/textareacomponent.h"
+#include "inferno/component/transformcomponent.h"
 #include "inferno/scene/scene.h"
 #include "inferno/script/cameracontroller.h"
 #include "inferno/script/nativescript.h"
@@ -43,20 +46,36 @@ void Scene::initialize()
 	m_texture = TextureManager::the().load("assets/gfx/test.png");
 	m_texture2 = TextureManager::the().load("assets/gfx/test-inverted.png");
 
+	// Load scene .json
+	// -------------------------------------
+
+	auto sceneJson = ruc::Json::parse(ruc::File("assets/scene/scene1.json").data());
+	VERIFY(sceneJson.exists("camera"), "scene doesnt contain a camera");
+
+	auto& cameraJson = sceneJson.at("camera");
+	uint32_t camera = loadEntity(cameraJson);
+
+	auto cameraType = CameraType::Perspective;
+	if (cameraJson.exists("type") && cameraJson.at("type").get<std::string>() == "orthographic") {
+		cameraType = CameraType::Orthographic;
+	}
+	addComponent<CameraComponent>(camera, cameraType);
+
+	if (cameraJson.exists("script")) {
+		auto& cameraScript = cameraJson.at("script");
+		if (cameraScript.exists("type") && cameraScript.exists("name")) {
+			if (cameraScript.at("type").get<std::string>() == "lua") {
+				addComponent<LuaScriptComponent>(camera, cameraScript.at("name").get<std::string>());
+			}
+			else {
+				addComponent<NativeScriptComponent>(camera).bind<CameraController>();
+			}
+		}
+	}
+
 	// Construct entities
 	// ---------------------------------
 
-	uint32_t camera = createEntity("Camera Entity");
-	auto& cameraTransform = getComponent<TransformComponent>(camera);
-	// cameraTransform.rotate.z = 0.0f;
-	// cameraTransform.translate.z = -1.0f;
-	// addComponent<CameraComponent>(camera, CameraType::Orthographic);
-	cameraTransform.rotate.z = -1.0f;
-	cameraTransform.translate.z = 1.0f;
-	addComponent<CameraComponent>(camera, CameraType::Perspective);
-	// addComponent<NativeScriptComponent>(camera).bind<CameraController>();
-	addComponent<LuaScriptComponent>(camera, "assets/lua/cameracontroller.lua");
-
 	uint32_t quad = createEntity("Quad");
 	addComponent<SpriteComponent>(quad, glm::vec4 { 1.0f, 1.0f, 1.0f, 1.0f }, m_texture);
 
@@ -114,6 +133,17 @@ void Scene::destroyEntity(uint32_t entity)
 	m_registry->destroy(entt::entity { entity });
 }
 
+uint32_t Scene::loadEntity(ruc::Json json)
+{
+	uint32_t entity = createEntity((json.exists("name"))
+	                                   ? json.at("name").get<std::string>()
+	                                   : "");
+	auto& transform = getComponent<TransformComponent>(entity);
+	json.getTo(transform);
+
+	return entity;
+}
+
 glm::mat4 Scene::cameraProjectionView()
 {
 	return CameraSystem::the().projectionView();
diff --git a/src/inferno/scene/scene.h b/src/inferno/scene/scene.h
index 9cf2d4d..31885e4 100644
--- a/src/inferno/scene/scene.h
+++ b/src/inferno/scene/scene.h
@@ -12,6 +12,7 @@
 #include "entt/entity/registry.hpp"    // entt::entity, entt::registry
 #include "glm/ext/matrix_float4x4.hpp" // glm::mat4
 #include "ruc/format/format.h"
+#include "ruc/json/json.h"
 
 namespace Inferno {
 
@@ -28,6 +29,8 @@ public:
 	uint32_t createEntity(const std::string& name = "");
 	void destroyEntity(uint32_t entity);
 
+	uint32_t loadEntity(ruc::Json json);
+
 	glm::mat4 cameraProjectionView();
 
 	void validEntity(uint32_t entity) const;