camera notify

src/td/render/Camera.cpp

@@ -8,6 +8,7 @@ namespace render {
 void Camera::UpdatePerspective(float a_AspectRatio) {
 	m_ProjectionMatrix = maths::Perspective(80.0f / 180.0f * PI, a_AspectRatio, 0.1f, 160.0f);
 	m_InvProjectionMatrix = maths::Inverse(m_ProjectionMatrix);
+	NotifyListeners(&ICameraListener::OnPerspectiveChange);
 }
 
 void Camera::SetCamPos(const Vec3f& a_NewPos) {
@@ -20,6 +21,7 @@ void Camera::SetCamPos(const Vec3f& a_NewPos) {
 	m_CamPos = a_NewPos;
 	m_ViewMatrix = maths::Look(m_CamPos, front, { 0, 1, 0 });
 	m_InvViewMatrix = maths::Transpose(maths::Inverse(m_ViewMatrix));  // why transpose ? I don't know
+	NotifyListeners(&ICameraListener::OnViewChange);
 }
 
 }  // namespace render

src/td/render/renderer/WorldRenderer.cpp

@@ -7,20 +7,28 @@
 namespace td {
 namespace render {
 
-WorldRenderer::WorldRenderer(Camera& a_Camera, const game::World& a_World) : Renderer(a_Camera), m_World(a_World){
+WorldRenderer::WorldRenderer(Camera& a_Camera, const game::World& a_World) : Renderer(a_Camera), m_World(a_World) {
 	m_WorldVao = std::make_unique<GL::VertexArray>(std::move(WorldLoader::LoadWorldModel(&a_World)));
+	a_Camera.BindListener(this);
 }
 
 WorldRenderer::~WorldRenderer() {}
 
 void WorldRenderer::Render() {
 	m_Shader.Start();
-	m_Shader.SetProjectionMatrix(m_Camera.GetProjectionMatrix());
-	m_Shader.SetViewMatrix(m_Camera.GetViewMatrix());
 	Renderer::Render(*m_WorldVao);
 	ImGui::ShowDemoWindow();
 }
 
+void WorldRenderer::OnPerspectiveChange() {
+	m_Shader.Start();
+	m_Shader.SetProjectionMatrix(m_Camera.GetProjectionMatrix());
+}
+
+void WorldRenderer::OnViewChange() {
+	m_Shader.Start();
+	m_Shader.SetViewMatrix(m_Camera.GetViewMatrix());
+}
 
 }  // namespace render
 }  // namespace td