void doArcball(
double * _viewMatrix,
double const * _rotationCenter,
double const * _projectionMatrix,
double const * _initialViewMatrix,
//double const * _currentViewMatrix,
double const * _initialMouse,
double const * _currentMouse,
bool screenSpaceRadius,
double radius)
{
Eigen::Map<Eigen::Vector3d const> rotationCenter(_rotationCenter);
Eigen::Map<Eigen::Matrix4d const> initialViewMatrix(_initialViewMatrix);
//Eigen::Map<Eigen::Matrix4d const> currentViewMatrix(_currentViewMatrix);
Eigen::Map<Eigen::Matrix4d const> projectionMatrix(_projectionMatrix);
Eigen::Map<Eigen::Matrix4d> viewMatrix(_viewMatrix);
Eigen::Vector2d initialMouse(_initialMouse);
Eigen::Vector2d currentMouse(_currentMouse);
Eigen::Quaterniond q;
Eigen::Vector3d Pa, Pc;
if (screenSpaceRadius) {
double aspectRatio = projectionMatrix(1, 1) / projectionMatrix(0, 0);
initialMouse(0) *= aspectRatio;
currentMouse(0) *= aspectRatio;
Pa = mapToSphere(initialMouse, radius);
Pc = mapToSphere(currentMouse, radius);
q.setFromTwoVectors(Pa - rotationCenter, Pc - rotationCenter);
}
else {
Pa = mapToSphere(projectionMatrix.inverse(), initialMouse, rotationCenter, radius);
Pc = mapToSphere(projectionMatrix.inverse(), currentMouse, rotationCenter, radius);
Eigen::Vector3d a = Pa - rotationCenter, b = Pc - rotationCenter;
#if 0
std::cout << "Mouse Initial Radius = " << sqrt(a.dot(a)) << " Current Radius = " << sqrt(b.dot(b)) << std::endl;
#endif
q.setFromTwoVectors(a, b);
}
Eigen::Matrix4d qMat4;
qMat4.setIdentity();
qMat4.topLeftCorner<3, 3>() = q.toRotationMatrix();
Eigen::Matrix4d translate;
translate.setIdentity();
translate.topRightCorner<3, 1>() = -rotationCenter;
Eigen::Matrix4d invTranslate;
invTranslate.setIdentity();
invTranslate.topRightCorner<3, 1>() = rotationCenter;
viewMatrix = invTranslate * qMat4 * translate * initialViewMatrix;
}
void GLWidget::mousePressEvent(QMouseEvent *event)
{
m_last_p2d = Imath::V2d(event->pos().x(), event->pos().y());
std::pair<bool, Imath::V3d> map;
map = mapToSphere(m_last_p2d);
m_last_pok = map.first;
m_last_p3d = map.second;
}
Quaternionf ArcBall::move(Vec2f p)
{
m_EndVector = mapToSphere(p);
Vec3f perp = m_StartVector.cross(m_EndVector);
if(perp.norm() > 1.0e-5f)
{
return Quaternionf(
m_StartVector.dot(m_EndVector),
perp.x(),
perp.y(),
perp.z()
);
}
return Quaternionf::Identity();
}
void GLWidget::mouseMoveEvent(QMouseEvent *event)
{
Imath::V2d newPoint2D(event->pos().x(), event->pos().y());
if ( ((newPoint2D.x < 0) || (newPoint2D.x > width()) ||
(newPoint2D.y < 0) || (newPoint2D.y > height())) ) {
event->ignore();
}
float value_y = 0;
std::pair<bool, Imath::V3d> map;
map = mapToSphere(m_last_p2d);
bool newPoint_hitSphere = map.first;
Imath::V3d newPoint3D = map.second;
float dx = newPoint2D.x - m_last_p2d.x;
float dy = newPoint2D.y - m_last_p2d.y;
float w = width();
float h = height();
makeCurrent();
if ( (event->buttons() == Qt::LeftButton & event->modifiers() == Qt::ControlModifier)
|| (event->buttons() == Qt::RightButton & event->modifiers() == Qt::AltModifier) ) {
m_camera.dolly(Imath::V2d(dx, dy));
} else if ( (event->buttons() & Qt::MidButton
|| (event->buttons() == Qt::LeftButton & event->modifiers() == Qt::ShiftModifier)) ) {
m_camera.track(Imath::V2d(dx, dy));
} else if ( event->buttons() & Qt::LeftButton ) {
m_rotating = true;
m_camera.rotate(Imath::V2d(dx, dy));
}
m_last_p2d = newPoint2D;
m_last_p3d = newPoint3D;
m_last_pok = newPoint_hitSphere;
m_camera.apply();
updateGL();
}
void _XArcBall::drag(_XVector2 point,_XVector4& rotate)
{
mapToSphere(point,m_dragVector); //Map the point to the sphere
//Return the quaternion equivalent to the rotation
_XVector3 perp = m_clickVector * m_dragVector; //Compute the vector perpendicular to the begin and end vectors
//Compute the length of the perpendicular vector
if(perp.getLength() > (1.0e-5)) //if its non-zero
//if(perp.getLength() >= 0.0f) //if its non-zero
{//We're ok, so return the perpendicular vector as the transform after all
rotate.x = perp.x;
rotate.y = perp.y;
rotate.z = perp.z;
//In the quaternion values, w is cosine (theta / 2), where theta is rotation angle
rotate.w = m_clickVector.dot(m_dragVector);
}else //if its zero
{//The begin and end vectors coincide, so return an identity transform
rotate.x =
rotate.y =
rotate.z =
rotate.w = 0.0f;
printf("Error!\n");
}
}
TerrainPatchData::TerrainPatchData(TerrainQuadtree* tree) :
tree(tree),
tessellation(tree->getPlanetarySurface()->getTessellation()),
vertices(tessellation + 3, std::vector<Ogre::Vector3>(tessellation + 3)),
normals(tessellation + 3, std::vector<Ogre::Vector3>(tessellation + 3)),
heights(tessellation + 3, std::vector<Ogre::Real>(tessellation + 3, 0.0)) {
int patchSize = tree->getSize();
Ogre::Real halfPatchSize = Ogre::Real(patchSize / 2);
Ogre::Real delta = (Ogre::Real)patchSize * (1.0 / (Ogre::Real)tessellation);
Ogre::SceneNode* patchSceneNode = tree->getSceneNode();
Ogre::SceneNode* planetarySceneNode = tree->getPlanetarySurface()->getSceneNode();
Ogre::Real planetaryRadius = (Ogre::Real)tree->getPlanetarySurface()->getRadius();
for (int z = -1; z < tessellation + 2; ++z) {
for (int x = -1; x < tessellation + 2; ++x) {
Ogre::Vector3 position(-halfPatchSize + delta * x, 0.0, -halfPatchSize + delta * z);
Ogre::Vector3 planetaryPosition = planetarySceneNode->convertWorldToLocalPosition(patchSceneNode->convertLocalToWorldPosition(position));
planetaryPosition = mapToSphere(planetaryPosition, planetaryRadius);
Ogre::Vector3 normal = planetaryPosition.normalisedCopy();
Ogre::Real height = tree->getPlanetarySurface()->getNoiseFunction()->getValue(planetaryPosition);
planetaryPosition = planetarySceneNode->convertLocalToWorldPosition(planetaryPosition);
position = patchSceneNode->convertWorldToLocalPosition(planetaryPosition);
normal = (tree->getRootSceneNode()->getOrientation().Inverse() * normal).normalisedCopy();
vertices[z + 1][x + 1] = position;
normals[z + 1][x + 1] = normal;
heights[z + 1][x + 1] = height;
}
}
for (int z = 0; z < tessellation + 1; ++z) {
for (int x = 0; x < tessellation + 1; ++x) {
processedPositions.push_back(getVertex(x, z));
processedNormals.push_back(getVertexNormal(x, z));
processedTextureCoords.push_back(getNormal(x, z));
}
}
// Add triangles.
for (int z = 0; z < tessellation; ++z) {
int zOffset = z * (tessellation + 1);
for (int x = 0; x < tessellation; ++x) {
int indices[4] = {
zOffset + x,
zOffset + x + 1,
zOffset + tessellation + 1 + x,
zOffset + tessellation + 1 + x + 1
};
processedIndices.push_back(indices[0]);
processedIndices.push_back(indices[2]);
processedIndices.push_back(indices[1]);
processedIndices.push_back(indices[2]);
processedIndices.push_back(indices[3]);
processedIndices.push_back(indices[1]);
}
}
}
Ray PointLight::shootRay(){
double x, y, z;
mapToSphere(randReal(), randReal(), x, y, z);
return Ray(pos, Vector(x, y, z));
}
void ArcBall::start(Vec2f p)
{
m_StartVector = mapToSphere(p);
}