Pre bindless

src/Engine/Actor/DirectionalLightActor.cpp

@@ -5,7 +5,23 @@ using namespace Seele;
 DirectionalLightActor::DirectionalLightActor(PScene scene) : Actor(scene) { attachComponent<Component::DirectionalLight>(); }
 
 DirectionalLightActor::DirectionalLightActor(PScene scene, Vector color, float intensity, Vector direction) : Actor(scene) {
-    attachComponent<Component::DirectionalLight>(Vector4(color, intensity), Vector4(glm::normalize(direction), 0));
+    attachComponent<Component::DirectionalLight>(Vector4(color, intensity));
+    Vector lightDirection = Vector(direction);
+    float dot = glm::dot(lightDirection, Math::Transform::FORWARD);
+    Quaternion rotation = Quaternion(1, 0, 0, 0);
+    // Handle the edge cases first
+    if (glm::epsilonEqual(dot, 1.0f, 0.00001f)) {
+        // Vectors are the same, no rotation
+    } else if (glm::epsilonEqual(dot, -1.0f, 0.00001f)) {
+        // Vectors are opposite need 180-degree rotation around any perpendicular axis
+        rotation = glm::angleAxis(glm::pi<float>(), Vector(0, 1, 0));
+    } else {
+        // Normal case
+        Vector axis = glm::normalize(glm::cross(lightDirection, Math::Transform::FORWARD));
+        float angle = std::acos(dot); // angle between vectors
+        rotation = glm::angleAxis(angle, axis);
+    }
+    attachComponent<Component::Transform>(Math::Transform(Vector(0, 0, 0), rotation));
 }
 
 DirectionalLightActor::~DirectionalLightActor() {}
@@ -16,4 +32,7 @@ Component::DirectionalLight& DirectionalLightActor::getDirectionalLightComponent
 
 const Component::DirectionalLight& DirectionalLightActor::getDirectionalLightComponent() const {
     return accessComponent<Component::DirectionalLight>();
-}
+}
+Component::Transform& DirectionalLightActor::getTransformComponent() { return accessComponent<Component::Transform>(); }
+
+const Component::Transform& DirectionalLightActor::getTransformComponent() const { return accessComponent<Component::Transform>(); }