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OrbitControls.cpp
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#include <memory>
#include "Core/geometry/Vector3.h"
#include "Core/geometry/Plane.h"
#include "Core/math/Matrix4x4.h"
#include "Core/math/Quaternion.h"
#include "Core/util/WeakPointer.h"
#include "Core/Graphics.h"
#include "Core/render/Camera.h"
#include "OrbitControls.h"
OrbitControls::OrbitControls(Core::WeakPointer<Core::Engine> engine, Core::WeakPointer<Core::Camera> targetCamera, Core::WeakPointer<CoreSync> coreSync):
engine(engine), targetCamera(targetCamera), coreSync(coreSync), moveFrames(0) {
}
void OrbitControls::handleGesture(GestureAdapter::GestureEvent event) {
if (event.getType() == GestureAdapter::GestureEventType::Scroll) {
Core::WeakPointer<Core::Object3D> cameraObjPtr = this->targetCamera->getOwner();
Core::Vector3r cameraVec;
cameraVec.set(0, 0, -1);
cameraObjPtr->getTransform().applyTransformationTo(cameraVec);
cameraVec = cameraVec * event.scrollDistance;
cameraObjPtr->getTransform().translate(cameraVec, Core::TransformationSpace::World);
}
else if (event.getType() == GestureAdapter::GestureEventType::Drag) {
Core::Int32 eventStartX = event.start.x;
Core::Int32 eventStartY = event.start.y;
if (this->moveFrames > 0) {
eventStartX = this->lastMoveX;
eventStartY = this->lastMoveY;
}
Core::Int32 eventEndX = event.end.x;
Core::Int32 eventEndY = event.end.y;
GestureAdapter::GesturePointer eventPointer = event.pointer;
Core::WeakPointer<Core::Graphics> graphics = this->engine->getGraphicsSystem();
Core::WeakPointer<Core::Renderer> rendererPtr = graphics->getRenderer();
Core::WeakPointer<Core::Object3D> cameraObject = this->targetCamera->getOwner();
cameraObject->getTransform().updateWorldMatrix();
Core::Matrix4x4 camWorldMat = cameraObject->getTransform().getWorldMatrix();
Core::Point3r cameraPos;
camWorldMat.transform(cameraPos);
Core::Vector3r cameraToOrigin = this->origin - cameraPos;
Core::Point3r originRelativeCameraPos(-cameraToOrigin.x, -cameraToOrigin.y, -cameraToOrigin.z);
if (eventPointer == GestureAdapter::GesturePointer::Secondary) {
Core::Real theta = ((Core::Real)eventEndX - (Core::Real)eventStartX) * -.0001f;
Core::Real phi = ((Core::Real)eventEndY - (Core::Real)eventStartY) * -.0001f;
Core::Real cosPhi = Core::Math::cos(phi);
Core::Vector3r cameraPosVec(originRelativeCameraPos.x, originRelativeCameraPos.y, originRelativeCameraPos.z);
cameraPosVec.normalize();
Core::Real cameraPosUpDot = cameraPosVec.dot(Core::Vector3r::Up);
if (theta != 0.0f || phi != 0.0f) {
Core::Real epsilon = 0.01f;
Core::Real rotationScaleFactor = 25.0f;
Core::Quaternion quatTheta = Core::Quaternion::fromAngleAxis(theta * rotationScaleFactor, Core::Vector3r::Up);
Core::Vector3r phiAxis = Core::Vector3r::Right;
camWorldMat.transform(phiAxis);
Core::Real finalPhi = phi * rotationScaleFactor;
Core::Quaternion quatPhi = Core::Quaternion::fromAngleAxis(finalPhi, phiAxis);
Core::Matrix4x4 rotTheta = quatTheta.rotationMatrix();
Core::Matrix4x4 rotPhi = quatPhi.rotationMatrix();
Core::Matrix4x4 worldTransformation;
worldTransformation.preTranslate(-this->origin.x, -this->origin.y, -this->origin.z);
Core::Real totalPhi = Core::Math::aCos(cameraPosUpDot) + finalPhi;
if ((totalPhi < Core::Math::PI - epsilon || phi < 0.0f) && (totalPhi > epsilon || phi > 0.0f)) worldTransformation.preMultiply(rotPhi);
worldTransformation.preMultiply(rotTheta);
worldTransformation.preTranslate(this->origin.x, this->origin.y, this->origin.z);
cameraObject->getTransform().transformBy(worldTransformation, Core::TransformationSpace::World);
cameraObject->getTransform().lookAt(this->origin, Core::Vector3r::Up);
this->lastMoveX = event.end.x;
this->lastMoveY = event.end.y;
}
}
else if (eventPointer == GestureAdapter::GesturePointer::Tertiary) {
Core::Real ndcZ = 0.5f;
Core::Point3r worldStartP = this->targetCamera->unProject(eventStartX, eventStartY, ndcZ);
Core::Point3r worldEndP = this->targetCamera->unProject(eventEndX, eventEndY, ndcZ);
camWorldMat.transform(worldStartP);
camWorldMat.transform(worldEndP);
Core::Vector3r cameraToAdjustedOrigin = cameraToOrigin;
cameraToAdjustedOrigin.normalize();
cameraToAdjustedOrigin = cameraToAdjustedOrigin * 5.0f;
Core::Point3r adjustedOrigin = cameraPos + cameraToAdjustedOrigin;
Core::Vector3r adjustedWorldStartV = worldStartP - adjustedOrigin;
Core::Vector3r adjustedWorldEndV = worldEndP - adjustedOrigin;
Core::Real translationScaleFactor = originRelativeCameraPos.magnitude();
Core::Vector3r viewDragVector = adjustedWorldEndV - adjustedWorldStartV;
viewDragVector.invert();
viewDragVector = viewDragVector * translationScaleFactor;
this->origin = this->origin + viewDragVector;
cameraObject->getTransform().translate(viewDragVector, Core::TransformationSpace::World);
this->lastMoveX = event.end.x;
this->lastMoveY = event.end.y;
}
}
if (this->moveFrames == 0) {
this->lastMoveX = event.start.x;
this->lastMoveY = event.start.y;
}
this->moveFrames++;
}
void OrbitControls::setOrigin(Core::Real x, Core::Real y, Core::Real z) {
this->origin.set(x, y, z);
}
Core::Point3r OrbitControls::getOrigin() {
Core::Point3r temp = this->origin;
return temp;
}
void OrbitControls::resetMove() {
this->moveFrames = 0;
}