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//##########################################################################
//# #
//# CLOUDCOMPARE #
//# #
//# This program is free software; you can redistribute it and/or modify #
//# it under the terms of the GNU General Public License as published by #
//# the Free Software Foundation; version 2 or later of the License. #
//# #
//# This program is distributed in the hope that it will be useful, #
//# but WITHOUT ANY WARRANTY; without even the implied warranty of #
//# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
//# GNU General Public License for more details. #
//# #
//# COPYRIGHT: EDF R&D / TELECOM ParisTech (ENST-TSI) #
//# #
//##########################################################################
#include "ccSphere.h"
//Local
#include "ccPointCloud.h"
ccSphere::ccSphere( PointCoordinateType radius,
const ccGLMatrix* transMat/*=0*/,
QString name/*=QString("Sphere")*/,
unsigned precision/*=DEFAULT_DRAWING_PRECISION*/)
: ccGenericPrimitive(name,transMat)
, m_radius(radius)
{
setDrawingPrecision(std::max<unsigned>(precision,MIN_DRAWING_PRECISION)); //automatically calls updateRepresentation
}
ccSphere::ccSphere(QString name/*=QString("Sphere")*/)
: ccGenericPrimitive(name)
, m_radius(0)
{
}
ccGenericPrimitive* ccSphere::clone() const
{
return finishCloneJob(new ccSphere(m_radius,&m_transformation,getName(),m_drawPrecision));
}
bool ccSphere::buildUp()
{
if (m_drawPrecision < MIN_DRAWING_PRECISION)
return false;
const unsigned steps = m_drawPrecision;
//vertices
ccPointCloud* verts = vertices();
assert(verts);
//vertices
unsigned count = steps*(steps-1)+2;
//faces
unsigned faces = steps*((steps-2)*2+2);
if (!init(count,true,faces,0))
{
ccLog::Error("[ccSphere::buildUp] Not enough memory");
return false;
}
//2 first points: poles
verts->addPoint(CCVector3(0,0,m_radius));
verts->addNorm(CCVector3(0,0,1));
verts->addPoint(CCVector3(0,0,-m_radius));
verts->addNorm(CCVector3(0,0,-1));
//then, angular sweep
PointCoordinateType angle_rad_step = static_cast<PointCoordinateType>(M_PI)/static_cast<PointCoordinateType>(steps);
CCVector3 N0,N,P;
{
for (unsigned j=1; j<steps; ++j)
{
PointCoordinateType theta = static_cast<PointCoordinateType>(j) * angle_rad_step;
PointCoordinateType cos_theta = cos(theta);
PointCoordinateType sin_theta = sin(theta);
N0.x = sin_theta;
N0.y = 0;
N0.z = cos_theta;
for (unsigned i=0; i<steps; ++i)
{
PointCoordinateType phi = static_cast<PointCoordinateType>(2*i) * angle_rad_step;
PointCoordinateType cos_phi = cos(phi);
PointCoordinateType sin_phi = sin(phi);
N.x = N0.x*cos_phi;
N.y = N0.x*sin_phi;
N.z = N0.z;
N.normalize();
P = N * m_radius;
verts->addPoint(P);
verts->addNorm(N);
}
}
}
//faces
{
assert(m_triVertIndexes);
//north pole
{
for (unsigned i=0; i<steps; ++i)
{
unsigned A = 2+i;
unsigned B = (i+1<steps ? A+1 : 2);
addTriangle(A,B,0);
}
}
//slices
for (unsigned j=1; j+1<steps; ++j)
{
unsigned shift = 2+(j-1)*steps;
for (unsigned i=0; i<steps; ++i)
{
unsigned A = shift+i;
unsigned B = (i+1<steps ? A+1 : shift);
assert(B < count);
addTriangle(A,A+steps,B);
addTriangle(B+steps,B,A+steps);
}
}
//south pole
{
unsigned shift = 2+(steps-2)*steps;
for (unsigned i=0; i<steps; ++i)
{
unsigned A = shift+i;
unsigned B = (i+1<steps ? A+1 : shift);
assert(B < count);
addTriangle(A,1,B);
}
}
}
notifyGeometryUpdate();
showNormals(true);
return true;
}
void ccSphere::setRadius(PointCoordinateType radius)
{
if (m_radius == radius)
return;
assert(radius > 0);
m_radius = radius;
buildUp();
applyTransformationToVertices();
}
bool ccSphere::toFile_MeOnly(QFile& out) const
{
if (!ccGenericPrimitive::toFile_MeOnly(out))
return false;
//parameters (dataVersion >= 21)
QDataStream outStream(&out);
outStream << m_radius;
return true;
}
bool ccSphere::fromFile_MeOnly(QFile& in, short dataVersion, int flags)
{
if (!ccGenericPrimitive::fromFile_MeOnly(in, dataVersion, flags))
return false;
//parameters (dataVersion >= 21)
QDataStream inStream(&in);
ccSerializationHelper::CoordsFromDataStream(inStream,flags,&m_radius,1);
return true;
}
void ccSphere::drawNameIn3D(CC_DRAW_CONTEXT& context)
{
if (!context.display)
return;
//we display it in the 2D layer in fact!
ccBBox bBox = getOwnBB();
if (!bBox.isValid())
return;
ccGLMatrix trans;
getAbsoluteGLTransformation(trans);
ccGLCameraParameters camera;
context.display->getGLCameraParameters(camera);
CCVector3 C = bBox.getCenter();
CCVector3d Q2D;
trans.apply(C);
camera.project(C, Q2D);
//we want to display this name next to the sphere, and not above it!
const ccViewportParameters& params = context.display->getViewportParameters();
int dPix = static_cast<int>(ceil(params.zoom * m_radius/params.pixelSize));
int bkgBorder = QFontMetrics(context.display->getTextDisplayFont()).height() / 4 + 4;
QFont font = context.display->getTextDisplayFont(); //takes rendering zoom into account!
context.display->displayText( getName(),
static_cast<int>(Q2D.x) + dPix + bkgBorder,
static_cast<int>(Q2D.y),
ccGenericGLDisplay::ALIGN_HLEFT | ccGenericGLDisplay::ALIGN_VMIDDLE,
0.75f,
0,
&font);
}
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