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