Example scene loading

src/dawn/util/CMakeLists.txt

@@ -6,4 +6,5 @@
 target_sources(${DAWN_TARGET_NAME}
   PRIVATE
     String.cpp
+    JSON.cpp
 )

src/dawn/util/JSON.cpp

@@ -0,0 +1,77 @@
+// Copyright (c) 2024 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "JSON.hpp"
+#include "assert/assert.hpp"
+
+using namespace Dawn;
+
+glm::vec3 JSON::vec3(const json &j) {
+  if(j.type() == json::value_t::array) {
+    return glm::vec3(j[0].get<float_t>(), j[1].get<float_t>(), j[2].get<float_t>());
+  } else if(j.type() == json::value_t::object) {
+    assertTrue(j.contains("x"), "Missing x in vec3");
+    assertTrue(j.contains("y"), "Missing y in vec3");
+    assertTrue(j.contains("z"), "Missing z in vec3");
+    
+    return glm::vec3(
+      j["x"].get<float_t>(),
+      j["y"].get<float_t>(),
+      j["z"].get<float_t>()
+    );
+  } else {
+    assertUnreachable("Invalid JSON type for vec3");
+  }
+}
+
+struct Color JSON::color(const json &j) {
+  if(j.type() == json::value_t::array) {
+    return {
+      j[0].get<float_t>(),
+      j[1].get<float_t>(),
+      j[2].get<float_t>(),
+      j[3].get<float_t>()
+    };
+
+  } else if(j.type() == json::value_t::object) {
+    float_t r, g, b, a = 1.0f;
+
+    if(j.contains("r")) {
+      r = j["r"].get<float_t>();
+    } else if(j.contains("red")) {
+      r = j["red"].get<float_t>();
+    } else {
+      assertTrue(j.contains("red"), "Missing red in color");
+    }
+
+    if(j.contains("g")) {
+      g = j["g"].get<float_t>();
+    } else if(j.contains("green")) {
+      g = j["green"].get<float_t>();
+    } else {
+      assertTrue(j.contains("green"), "Missing green in color");
+    }
+
+    if(j.contains("b")) {
+      b = j["b"].get<float_t>();
+    } else if(j.contains("blue")) {
+      b = j["blue"].get<float_t>();
+    } else {
+      assertTrue(j.contains("blue"), "Missing blue in color");
+    }
+
+    if(j.contains("a")) {
+      a = j["a"].get<float_t>();
+    } else if(j.contains("alpha")) {
+      a = j["alpha"].get<float_t>();
+    }
+
+    return { r, g, b, a };
+  } else if(j.type() == json::value_t::string) {
+    return Color::fromString(j.get<std::string>());
+  } else {
+    assertUnreachable("Invalid JSON type for color");
+  }
+}

src/dawn/util/JSON.hpp

@@ -0,0 +1,29 @@
+// Copyright (c) 2024 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "dawn.hpp"
+#include "display/Color.hpp"
+
+namespace Dawn {
+  class JSON final {
+    public:
+      /**
+       * Parses the given JSON string as a vec3.
+       * 
+       * @param j JSON obj to parse.
+       * @return Parsed vec3.
+       */
+      static glm::vec3 vec3(const json &j);
+
+      /**
+       * Parses the given JSON string as a color.
+       * 
+       * @param j JSON obj to parse.
+       * @return Parsed color.
+       */
+      static struct Color color(const json &j);
+  };
+}