Updated level curve extraction example

Author: Hazardu

examples_tests/44.LevelCurveExtraction/InputEventReciever.h

@@ -7,8 +7,7 @@
 class ChgSpacingEventReciever : public irr::IEventReceiver
 {
 	public:
-		ChgSpacingEventReciever() : spacing(10), running(true)
-		{
+		ChgSpacingEventReciever() : spacing(10), running(true), speed(1), resetCam(false) {
 		}
 
 		bool OnEvent(const irr::SEvent& event)
@@ -31,11 +30,29 @@ class ChgSpacingEventReciever : public irr::IEventReceiver
 				case irr::KEY_KEY_S:
 					saveBuffer = true;
 					return true;
+				case irr::KEY_KEY_R:
+					resetCam = true;
+					return true;
+				case irr::KEY_MINUS:
+					speed = std::clamp<float>(speed - 0.1f, 0.2f, 5.0f);
+					std::cout << "Camera speed:  " << speed << std::endl;
+					return true;
+				case irr::KEY_PLUS:
+					speed = std::clamp<float>(speed + 0.1f, 0.2f, 5.0f);
+					std::cout << "Camera speed:  " << speed << std::endl;
+					return true;
 				default:
 					break;
 				}
 			}
+			else if (event.EventType == irr::EET_MOUSE_INPUT_EVENT && event.MouseInput.Wheel != 0.0f)
+			{
+				speed = std::clamp<float>(speed + event.MouseInput.Wheel / 10.0f, 0.2f, 5.0f);
+				std::cout << "Camera speed:  " << speed << std::endl;
+
+				return true;
 
+			}
 			return false;
 		}
 		inline bool keepOpen() const { return running; }
@@ -49,10 +66,21 @@ class ChgSpacingEventReciever : public irr::IEventReceiver
 			}
 			return false;
 		}
-
+		inline int resetCameraPosition()
+		{
+			if (resetCam)
+			{
+				resetCam = false;
+				return true;
+			}
+			return false;
+		}
+		inline float getCameraSpeed() const { return speed; }
 	private:
+		float speed;
 		int spacing;
 		bool running;
 		bool saveBuffer;
+		bool resetCam;
 };
 #endif

examples_tests/44.LevelCurveExtraction/main.cpp

@@ -491,9 +491,12 @@ int main()
     // finally get our GPU mesh
     auto gpumesh = driver->getGPUObjectsFromAssets(&mesh_raw, &mesh_raw+1)->front();
 
+    auto startingCameraSpeed = gpumesh->getBoundingBox().getExtent().getLength() * 0.0005f;
+    float cameraSpeed = 1;
+
     auto boundingBoxSize = gpumesh->getBoundingBox().getExtent().getLength();
 	//! we want to move around the scene and view it from different angles
-	scene::ICameraSceneNode* camera = smgr->addCameraSceneNodeFPS(0,100.0f, boundingBoxSize * 0.0005f);
+    scene::ICameraSceneNode* camera = smgr->addCameraSceneNodeFPS(0, 100.0f, startingCameraSpeed);
 
 	camera->setPosition(core::vector3df(-4,0,0));
 	camera->setTarget(core::vector3df(0,0,0));
@@ -502,10 +505,29 @@ int main()
 
     smgr->setActiveCamera(camera);
 	uint64_t lastFPSTime = 0;
-    
     GlobalUniforms globalUniforms = { 0u,10.f };
 	while(device->run() && receiver.keepOpen())
 	{
+        if (receiver.resetCameraPosition())
+        {
+            camera->setPosition(core::vector3df(-4, 0, 0));
+            camera->setTarget(core::vector3df(0, 0, 0));
+        }
+        if (cameraSpeed != receiver.getCameraSpeed())
+        {
+            cameraSpeed = receiver.getCameraSpeed();
+            auto pos = camera->getPosition();
+            auto rot = camera->getRotation();
+            smgr->addToDeletionQueue(camera);
+            camera = smgr->addCameraSceneNodeFPS(0, 100.0f, startingCameraSpeed * cameraSpeed);
+            smgr->setActiveCamera(camera);
+            camera->setPosition(pos);
+            camera->setRotation(rot);
+            camera->setNearValue(1.f);
+            camera->setFarValue(5000.0f);
+        }
+
+
         driver->beginScene(true, true, video::SColor(255,128,128,128) );
 
         // always update cause of mdiIndex