[ModifiedMayaCamera] setZoomAndRotationBasedOnTargetAndPosition

temp hack before rewrite to make the camera work with initial params.

Author: Erfan-Ahmadi

examples_tests/22.RaytracedAO/main.cpp

@@ -14,6 +14,7 @@
 #include "nbl/ext/MitsubaLoader/CMitsubaLoader.h"
 #include "CommandLineHandler.hpp"
 
+#include "CSceneNodeAnimatorCameraModifiedMaya.h"
 #include "Renderer.h"
 
 
@@ -204,7 +205,7 @@ int main(int argc, char** argv)
 			auto up = tpose.rows[1];
 			core::vectorSIMDf view = tpose.rows[2];
 			auto target = view+pos;
-
+			
 			camera->setTarget(target.getAsVector3df());
 			if (core::dot(core::normalize(core::cross(camera->getUpVector(),view)),core::cross(up,view)).x<0.99f)
 				camera->setUpVector(up);
@@ -278,11 +279,14 @@ int main(int argc, char** argv)
 		camera->setNearValue(20.f);
 		camera->setFarValue(5000.f);
 	}
-
+	
+	auto modifiedMayaAnim = reinterpret_cast<scene::CSceneNodeAnimatorCameraModifiedMaya*>(camera->getAnimators()[0]);
+	core::vectorSIMDf cameraPos; cameraPos.set(camera->getPosition());
+	core::vectorSIMDf cameraTarget; cameraTarget.set(camera->getTarget());
+	modifiedMayaAnim->setZoomAndRotationBasedOnTargetAndPosition(cameraPos, cameraTarget);
 
 	auto driver = device->getVideoDriver();
 
-
 	core::smart_refctd_ptr<Renderer> renderer = core::make_smart_refctd_ptr<Renderer>(driver,device->getAssetManager(),smgr);
 	constexpr uint32_t MaxSamples = MAX_ACCUMULATED_SAMPLES;
 	auto sampleSequence = core::make_smart_refctd_ptr<asset::ICPUBuffer>(sizeof(uint32_t)*MaxSamples*Renderer::MaxDimensions);
@@ -330,12 +334,10 @@ int main(int argc, char** argv)
 
 	renderer->init(meshes, std::move(sampleSequence));
 	meshes = {}; // free memory
-	
 
 	auto extent = renderer->getSceneBound().getExtent();
 	smgr->setActiveCamera(camera);
 
-
 	QToQuitEventReceiver receiver;
 	device->setEventReceiver(&receiver);
 
@@ -345,7 +347,11 @@ int main(int argc, char** argv)
 	{
 		driver->beginScene(false, false);
 
+		std::cout << "Camera Position Before Render: (" << camera->getPosition().X << "," << camera->getPosition().Y << "," << camera->getPosition().Z << ")" << std::endl;
+		std::cout << "Target Before Render: (" << camera->getTarget().X << "," << camera->getTarget().Y << "," << camera->getTarget().Z << ")" << std::endl;
 		renderer->render(device->getTimer());
+		std::cout << "Camera Position After Render: (" << camera->getPosition().X << "," << camera->getPosition().Y << "," << camera->getPosition().Z << ")" << std::endl;
+		std::cout << "Target After Render: (" << camera->getTarget().X << "," << camera->getTarget().Y << "," << camera->getTarget().Z << ")" << std::endl;
 
 		auto oldVP = driver->getViewPort();
 		driver->blitRenderTargets(renderer->getColorBuffer(),nullptr,false,false,{},{},true);

source/Nabla/CSceneNodeAnimatorCameraModifiedMaya.cpp

@@ -39,7 +39,6 @@ CSceneNodeAnimatorCameraModifiedMaya::CSceneNodeAnimatorCameraModifiedMaya(gui::
 	allKeysUp();
 }
 
-
 //! destructor
 CSceneNodeAnimatorCameraModifiedMaya::~CSceneNodeAnimatorCameraModifiedMaya()
 {
@@ -48,6 +47,33 @@ CSceneNodeAnimatorCameraModifiedMaya::~CSceneNodeAnimatorCameraModifiedMaya()
 }
 
 
+void CSceneNodeAnimatorCameraModifiedMaya::setZoomAndRotationBasedOnTargetAndPosition(const core::vectorSIMDf& position, const core::vectorSIMDf& target)
+{
+	core::vectorSIMDf relativeTarget = position - target;
+	// core::vector3df relativeRotation = relativeTarget.getAsVector3df().getHorizontalAngle();
+	float angleX = 0.0f;
+	float angleY = 0.0f;
+
+	const double tmp = core::degrees(atan2((double)relativeTarget.z, (double)relativeTarget.x));
+	angleX = tmp;
+	if (angleX < 0)
+		angleX += 360;
+	if (angleX >= 360)
+		angleX -= 360;
+
+	const double z1 = core::sqrt(relativeTarget.x*relativeTarget.x + relativeTarget.z*relativeTarget.z);
+	angleY = (core::degrees(atan2((double)relativeTarget.y, (double)z1)) - 0.0);
+	if (angleY < 0)
+		angleY += 360;
+	if (angleY >= 360)
+		angleY -= 360;
+
+	CurrentZoom = core::sqrt(core::dot(relativeTarget, relativeTarget)[0]); 
+	OldTarget = target;
+	RotX = 360-angleX;
+	RotY = angleY;
+}
+
 //! It is possible to send mouse and key events to the camera. Most cameras
 //! may ignore this input, but camera scene nodes which are created for
 //! example with scene::ISceneManager::addMayaCameraSceneNode or
@@ -286,7 +312,7 @@ void CSceneNodeAnimatorCameraModifiedMaya::animateNode(IDummyTransformationScene
 	position.X = CurrentZoom + target.X;
 	position.Y = target.Y;
 	position.Z = target.Z;
-
+	
 	position.rotateXYByRAD(core::radians(nRotY), target);
 	position.rotateXZByRAD(-core::radians(nRotX), target);
 

source/Nabla/CSceneNodeAnimatorCameraModifiedMaya.h

@@ -82,6 +82,8 @@ namespace nbl
 			//! Enable/disable zooming when right button is pressed
 			virtual void toggleZoomWithRightButton() override;
 
+			void setZoomAndRotationBasedOnTargetAndPosition(const core::vectorSIMDf& position, const core::vectorSIMDf& target);
+
 		private:
 			void allKeysUp();
 			void animate();