double ComputeCylinderRadius (const Point3d & p1,
const Point3d & p2,
const Point3d & p3,
const Point3d & p4)
{
Vec3d v12(p1, p2);
Vec3d v13(p1, p3);
Vec3d v14(p1, p4);
Vec3d n1 = Cross (v12, v13);
Vec3d n2 = Cross (v14, v12);
double n1l = n1.Length();
double n2l = n2.Length();
n1 /= n1l;
n2 /= n2l;
double v12len = v12.Length();
double h1 = n1l / v12len;
double h2 = n2l / v12len;
/*
(*testout) << "n1 = " << n1 << " n2 = " << n2
<< "h1 = " << h1 << " h2 = " << h2 << endl;
*/
return ComputeCylinderRadius (n1, n2, h1, h2);
}
bool Line::Shortest(const Line& l2, Line& lshort, double& t1, double& t2)const {
/*
Calculate the line segment PaPb that is the shortest route between
two lines P1P2 and P3P4. Calculate also the values of mua and mub where
Pa = P1 + t1 (P2 - P1)
Pb = P3 + t2 (P4 - P3)
Return FALSE if no solution exists. P Bourke method.
Input this 1st line
Input l2 2nd line
Output lshort shortest line between lines (if lshort.ok == false, the line intersect at a point lshort.p0)
Output t1 parameter at intersection on 1st Line
Output t2 parameter at intersection on 2nd Line
*/
Vector3d v13(l2.p0, this->p0);
if(this->ok == false || l2.ok == false) return false;
double d1343 = v13 * l2.v; // dot products
double d4321 = l2.v * this->v;
double d1321 = v13 * this->v;
double d4343 = l2.v * l2.v;
double d2121 = this->v * this->v;
double denom = d2121 * d4343 - d4321 * d4321;
if(fabs(denom) < 1.0e-09) return false;
double numer = d1343 * d4321 - d1321 * d4343;
t1 = numer / denom;
t2 = (d1343 + d4321 * t1) / d4343;
lshort = Line(t1* this->v + this->p0, t2 * l2.v + l2.p0);
t1 *= this->length;
t2 *= l2.length; // parameter in line length for tolerance checking
return true;
}
void DragRect::TrackPoint3(const DPoint& pt3) {
// pt1 fixed, v01 direction locked
DPoint pt1 = v01_.add(pt0_);
Vec2d v13(pt1, pt3);
v01_ = v01_.unit().scale(-v01_.project(v13));
pt0_ = v01_.flip180().add(pt1);
v02_ = Vec2d(pt0_, v01_.add(pt3));
}
void DragRect::TrackPoints13(const DPoint& pt1, const DPoint& pt3) {
// width variable, height variable, theta constant
double fdy = v02_.project(v01_) / v02_.mag();
double fdx = Vec2d(v02_.unit().scale(v02_.mag() * fdy).add(pt0_),
v01_.add(pt0_)).mag() / v02_.mag();
Vec2d v13(pt1, pt3);
DPoint ptT = v13.unit().scale(v13.mag() * fdy).add(pt1);
DPoint pt0 = v13.flip90().unit().scale(v13.mag() * fdx).add(ptT);
pt0_ = pt0;
v01_ = Vec2d(pt0, pt1);
v02_ = Vec2d(pt0, v01_.add(pt3));
}
Real Pyramid5::volume () const
{
// The pyramid with a bilinear base has volume given by the
// formula in: "Calculation of the Volume of a General Hexahedron
// for Flow Predictions", AIAA Journal v.23, no.6, 1984, p.954-
Node * node0 = this->get_node(0);
Node * node1 = this->get_node(1);
Node * node2 = this->get_node(2);
Node * node3 = this->get_node(3);
Node * node4 = this->get_node(4);
// Construct Various edge and diagonal vectors
Point v40 ( *node0 - *node4 );
Point v13 ( *node3 - *node1 );
Point v02 ( *node2 - *node0 );
Point v03 ( *node3 - *node0 );
Point v01 ( *node1 - *node0 );
// Finally, ready to return the volume!
return (1./6.)*(v40*(v13.cross(v02))) + (1./12.)*(v02*(v01.cross(v03)));
}
void Scene::init(){
primitives = new Primitive*[25];
nrOfPrimitives = 0;
//wall at0,0,1
Vec3 v121( 0,0, 1 );
primitives[nrOfPrimitives] = new PlanePrim( v121, -13.0f );
primitives[nrOfPrimitives]->getMaterial()->setReflection( 1 );
primitives[nrOfPrimitives]->getMaterial()->setDiffuse( 0.0f );
primitives[nrOfPrimitives]->getMaterial()->setSpecular(1.0f);
Color c121( 1,1,1 );
primitives[nrOfPrimitives++]->getMaterial()->setColor(c121);
//wall at 0 0 -1
Vec3 v12( 0,0, -1 );
primitives[nrOfPrimitives] = new PlanePrim( v12, 13.0f );
primitives[nrOfPrimitives]->getMaterial()->setReflection( 1.0f );
primitives[nrOfPrimitives]->getMaterial()->setDiffuse( 0.0f );
primitives[nrOfPrimitives]->getMaterial()->setSpecular(1.0f);
Color c12( 0.3f,0.3f,0.7f );
primitives[nrOfPrimitives++]->getMaterial()->setColor(c12);
//-
//the ground
Vec3 v1( 0,1, 0 );
primitives[nrOfPrimitives] = new CheckerBoard( v1, 3.4f );
primitives[nrOfPrimitives]->getMaterial()->setReflection( 0.7f );
primitives[nrOfPrimitives]->getMaterial()->setDiffuse( 1.0f );
primitives[nrOfPrimitives]->getMaterial()->setSpecular(0.0f);
Color c1( 0.3f, 0.3f, 0.7f );
primitives[nrOfPrimitives++]->getMaterial()->setColor(c1);
//
// 0 -1 0
Vec3 v13( 0,-1, 0 );
primitives[nrOfPrimitives] = new PlanePrim( v13, -3.4f );
primitives[nrOfPrimitives]->getMaterial()->setReflection( 1 );
primitives[nrOfPrimitives]->getMaterial()->setDiffuse( 1.0f );
primitives[nrOfPrimitives]->getMaterial()->setSpecular(1.0f - primitives[nrOfPrimitives]->getMaterial()->getDiffuse());
Color c13( 1,1,1 );
primitives[nrOfPrimitives++]->getMaterial()->setColor(c13);
//
//middle sphere
Vec3 v2( 0, 1, 8 );
primitives[nrOfPrimitives] = new Sphere( v2, 1.0f );
primitives[nrOfPrimitives]->getMaterial()->setReflection( 1 );
primitives[nrOfPrimitives]->getMaterial()->setDiffuse( 0.2 );
primitives[nrOfPrimitives]->getMaterial()->setSpecular(1.0f - primitives[nrOfPrimitives]->getMaterial()->getDiffuse());
Color c2( 1,1,1);
primitives[nrOfPrimitives++]->getMaterial()->setColor( c2 );
//-
//left sphere
Vec3 v3( -5.5f, -0.5, 7 );
Color c3( 0.7f, 0.7f, 0 );
primitives[nrOfPrimitives] = new Sphere( v3, 2 );
primitives[nrOfPrimitives]->getMaterial()->setReflection( 0.6f );
primitives[nrOfPrimitives]->getMaterial()->setDiffuse( 0.9f );
primitives[nrOfPrimitives]->getMaterial()->setSpecular(1.0f - primitives[nrOfPrimitives]->getMaterial()->getDiffuse());
primitives[nrOfPrimitives++]->getMaterial()->setColor( c3 );
//-
//right sphere
Vec3 v31( 5.5f, -0.5, 7 );
Color c31( 0.7f, 0.0f, 0 );
primitives[nrOfPrimitives] = new Sphere( v31, 2 );
primitives[nrOfPrimitives]->getMaterial()->setReflection( 0.6f );
primitives[nrOfPrimitives]->getMaterial()->setDiffuse( 0.9f );
primitives[nrOfPrimitives]->getMaterial()->setSpecular(1.0f);
primitives[nrOfPrimitives++]->getMaterial()->setColor( c31 );
//-
//a light
Vec3 v4( 3, 2.5f, 3 );
Color c4(0.7f,0.7f,0.7f);
primitives[nrOfPrimitives] = new Sphere( v4, 0.5f );
primitives[nrOfPrimitives]->isLight = true;
primitives[nrOfPrimitives++]->getMaterial()->setColor( c4 );
//--
//another light
Vec3 v5( 0, 5, 10 );
Color c5( 0.6f, 0.6f, 0.8f );
primitives[nrOfPrimitives] = new Sphere( v5, 0.5f );
primitives[nrOfPrimitives]->isLight = true;
primitives[nrOfPrimitives++]->getMaterial()->setColor( c5 );
//--
}
void Hud::Draw (Zeni::Time::Second_Type elapsedTime)
{
HeroComponent & hero = HeroComponent::GetInstance();
double heroHealth = hero.GetHealth();
double heroShields = hero.GetShields();
double healthWidth = 200.0f;
double healthHeight = 30.0f;
Zeni::Point2f bgPosition1 (590.0f, 40.0f);
Zeni::Point2f bgPosition2 (bgPosition1.x, bgPosition1.y + healthHeight);
Zeni::Point2f bgPosition3 (bgPosition1.x + healthWidth, bgPosition1.y + healthHeight);
Zeni::Point2f bgPosition4 (bgPosition1.x + healthWidth, bgPosition1.y);
Zeni::Point2f healthPosition1 = bgPosition1;
Zeni::Point2f healthPosition2 = bgPosition2;
Zeni::Point2f healthPosition3 (bgPosition1.x + healthWidth * heroHealth / 1000.0f, bgPosition1.y + healthHeight);
Zeni::Point2f healthPosition4 (bgPosition1.x + healthWidth * heroHealth / 1000.0f, bgPosition1.y);
Zeni::Point2f shieldPosition1 = bgPosition1;
Zeni::Point2f shieldPosition2 = bgPosition2;
Zeni::Point2f shieldPosition3 (bgPosition1.x + healthWidth * heroShields / 100.0f, bgPosition1.y + healthHeight);
Zeni::Point2f shieldPosition4 (bgPosition1.x + healthWidth * heroShields / 100.0f, bgPosition1.y);
int score = hero.GetScore();
std::stringstream ss4;
ss4 << score;
Zeni::get_Fonts()["score"].render_text (ss4.str(), Zeni::Point2f (20.0f, 550.0f), Zeni::get_Colors()["score"]);
++frameCount;
std::stringstream ss ("FPS: ");
ss << fps;
//Zeni::get_Fonts()["fps"].render_text (ss.str(), Zeni::Point2f(), Zeni::get_Colors()["fps"]);
const std::vector<ProjectileFactory*>& heroWeapons = hero.GetWeapons();
size_t numWeapons = heroWeapons.size();
int selectedWeapon = hero.GetSelectedWeaponIndex();
double corner = 800.0f - 30.0f * numWeapons;
Zeni::Color enabled = Zeni::get_Colors()["weapon_enabled"];
Zeni::Color disabled = Zeni::get_Colors()["weapon_disabled"];
for (int i = 0; i < numWeapons; ++i)
{
Zeni::Vertex2f_Texture vertex1 (Zeni::Point2f(corner + 30.0f * i, 0.0f), Zeni::Point2f(0.0f, 0.0f));
Zeni::Vertex2f_Texture vertex2 (Zeni::Point2f(corner + 30.0f * i, 30.0f), Zeni::Point2f(0.0f, 1.0f));
Zeni::Vertex2f_Texture vertex3 (Zeni::Point2f(corner + 30.0f * (i + 1), 30.0f), Zeni::Point2f(1.0f, 1.0f));
Zeni::Vertex2f_Texture vertex4 (Zeni::Point2f(corner + 30.0f * (i + 1), 0.0f), Zeni::Point2f(1.0f, 0.0f));
Zeni::Quadrilateral<Zeni::Vertex2f_Texture> q (vertex1, vertex2, vertex3, vertex4);
Zeni::Material backing(i == selectedWeapon ? "selected_weapon" : "weapon");
q.lend_Material (&backing);
Zeni::get_Video().render (q);
double r = selectedWeapon == i ? weaponRotation : 0.0f;
Zeni::render_image (
heroWeapons[i]->GetTexture(),
Zeni::Point2f(corner + 30 * i + 5.0f, 5.0f),
Zeni::Point2f(corner + 30 * (i + 1.0f) - 5.0f, 25.0),
r,
1.0f,
Zeni::Point2f(corner + 30 * i + 15.0f, 15.0f),
false,
heroWeapons[i]->IsReady() ? enabled : disabled);
}
int heroAmmo = heroWeapons[selectedWeapon]->GetAmmo();
std::stringstream ss3;
ss3 << heroAmmo;
Zeni::get_Fonts()["ammo"].render_text (ss3.str(), Zeni::Point2f(corner - 5.0f, 0.0f), Zeni::get_Colors()["ammo"], Zeni::ZENI_RIGHT);
Zeni::Vertex2f_Texture v9 (bgPosition1, Zeni::Point2f (0.0f, 0.0f));
Zeni::Vertex2f_Texture v10 (bgPosition2, Zeni::Point2f (0.0f, 1.0f));
Zeni::Vertex2f_Texture v11 (bgPosition3, Zeni::Point2f (1.0f, 1.0f));
Zeni::Vertex2f_Texture v12 (bgPosition4, Zeni::Point2f (1.0f, 0.0f));
Zeni::Quadrilateral<Zeni::Vertex2f_Texture> q3 (v9, v10, v11, v12);
Zeni::Material healthbar1("healthbar1");
q3.lend_Material (&healthbar1);
Zeni::get_Video().render (q3);
Zeni::Vertex2f_Texture v13 (healthPosition1, Zeni::Point2f (0.0f, 0.0f));
Zeni::Vertex2f_Texture v14 (healthPosition2, Zeni::Point2f (0.0f, 1.0f));
Zeni::Vertex2f_Texture v15 (healthPosition3, Zeni::Point2f (heroHealth / 1000.0f, 1.0f));
Zeni::Vertex2f_Texture v16 (healthPosition4, Zeni::Point2f (heroHealth / 1000.0f, 0.0f));
Zeni::Quadrilateral<Zeni::Vertex2f_Texture> q4 (v13, v14, v15, v16);
Zeni::Material healthbar2("healthbar2");
q4.lend_Material (&healthbar2);
Zeni::get_Video().render (q4);
Zeni::Vertex2f_Texture v17 (shieldPosition1, Zeni::Point2f (0.0f, 0.0f));
Zeni::Vertex2f_Texture v18 (shieldPosition2, Zeni::Point2f (0.0f, 1.0f));
Zeni::Vertex2f_Texture v19 (shieldPosition3, Zeni::Point2f (heroShields / 100.0f, 1.0f));
Zeni::Vertex2f_Texture v20 (shieldPosition4, Zeni::Point2f (heroShields / 100.0f, 0.0f));
Zeni::Quadrilateral<Zeni::Vertex2f_Texture> q5 (v17, v18, v19, v20);
Zeni::Material healthbar3("healthbar3");
q5.lend_Material (&healthbar3);
Zeni::get_Video().render (q5);
double timeRemaining = GameTimer::GetInstance().GetRemainingTime();
Zeni::Color timerTextColor = timeRemaining < 10.0f ? Zeni::get_Colors()["low_time"] : Zeni::get_Colors()["time"];
Zeni::render_image (
"Timer",
Zeni::Point2f (620.0f, 540.0f),
Zeni::Point2f (670.0f, 590.0f),
false,
timerTextColor);
std::stringstream ss2;
int minutes = (int)timeRemaining / 60;
ss2 << minutes << ":" << std::fixed << std::setprecision(2) << timeRemaining - minutes * 60;
Zeni::get_Fonts()["time"].render_text (ss2.str(), Zeni::Point2f(680.0f, 550.0f), timerTextColor);
}
osg::Drawable *ReverseTileNode::createReverseTile(void) const {
// Get the tile
ReverseTile* tile = static_cast<ReverseTile*>(_lego);
// Get tile color
QColor color = tile->getColor();
// Get integer sizes
int width = tile->getWidth();
int length = tile->getLength();
int height = 3;
// Get real position, according to tile size
double mw = (-width)*Lego::length_unit/2;
double pw = (width)*Lego::length_unit/2;
double mwp = (-width+2)*Lego::length_unit/2;
double ml = (-length)*Lego::length_unit/2;
double pl = (length)*Lego::length_unit/2;
double mh = (-height)*Lego::height_unit/2;
double ph = (height)*Lego::height_unit/2;
double phm = (height-1)*Lego::height_unit/2;
// Create 14 vertices
osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
osg::Vec3 v0(mw, ml, mh);
osg::Vec3 v1(mw, pl, mh);
osg::Vec3 v2(mwp, pl, mh);
osg::Vec3 v3(mwp, ml, mh);
osg::Vec3 v4(pw, ml, phm);
osg::Vec3 v5(pw, pl, phm);
osg::Vec3 v6(pw, pl, ph);
osg::Vec3 v7(pw, ml, ph);
osg::Vec3 v8(mw, ml, ph);
osg::Vec3 v9(mw, pl, ph);
osg::Vec3 v10(mwp, ml, phm);
osg::Vec3 v11(mwp, ml, ph);
osg::Vec3 v12(mwp, pl, ph);
osg::Vec3 v13(mwp, pl, phm);
// Create 10 faces, 8 faces are quads splitted into two triangles
// NB: Down face is transparent, we don't even create it
// Front face t1
vertices->push_back(v4);
vertices->push_back(v5);
vertices->push_back(v6);
// Front face t2
vertices->push_back(v4);
vertices->push_back(v6);
vertices->push_back(v7);
// Back face t1
vertices->push_back(v0);
vertices->push_back(v1);
vertices->push_back(v8);
// Back face t2
vertices->push_back(v1);
vertices->push_back(v8);
vertices->push_back(v9);
// Top face t1
vertices->push_back(v6);
vertices->push_back(v7);
vertices->push_back(v9);
// Top face t2
vertices->push_back(v7);
vertices->push_back(v8);
vertices->push_back(v9);
// Slop face t1
vertices->push_back(v2);
vertices->push_back(v3);
vertices->push_back(v5);
// Slop face t2
vertices->push_back(v3);
vertices->push_back(v4);
vertices->push_back(v5);
// Right triangle face
vertices->push_back(v2);
vertices->push_back(v13);
vertices->push_back(v5);
// Right quad face t1
vertices->push_back(v13);
vertices->push_back(v12);
vertices->push_back(v6);
// Right quad face t2
vertices->push_back(v13);
vertices->push_back(v6);
vertices->push_back(v5);
// Right quad face down t1
vertices->push_back(v1);
vertices->push_back(v9);
vertices->push_back(v12);
// Right quad face down t2
vertices->push_back(v1);
vertices->push_back(v2);
vertices->push_back(v12);
// Left triangle face
vertices->push_back(v3);
vertices->push_back(v4);
vertices->push_back(v10);
// Left quad face t1
vertices->push_back(v4);
vertices->push_back(v10);
vertices->push_back(v11);
// Left quad face t2
vertices->push_back(v4);
vertices->push_back(v7);
vertices->push_back(v11);
// Left quad face down t1
vertices->push_back(v0);
vertices->push_back(v3);
vertices->push_back(v8);
// Left quad face down t2
vertices->push_back(v3);
vertices->push_back(v8);
vertices->push_back(v11);
// Create tile geometry
osg::ref_ptr<osg::Geometry> tileGeometry = new osg::Geometry;
// Match vertices
tileGeometry->setVertexArray(vertices);
// Add color (each rectangle has the same color except for the down one which is transparent)
osg::Vec4 osgColor(static_cast<float>(color.red())/255.0, static_cast<float>(color.green())/255.0, static_cast<float>(color.blue())/255.0, 1.0);
osg::ref_ptr<osg::Vec4Array> colors = new osg::Vec4Array;
// Every face has the same color, so there is only one color
colors->push_back(osgColor);
// Match color
tileGeometry->setColorArray(colors);
tileGeometry->setColorBinding(osg::Geometry::BIND_OVERALL);
// Create normals
osg::ref_ptr<osg::Vec3Array> normals = new osg::Vec3Array;
normals->push_back(osg::Vec3(1, 0, 0));
normals->push_back(osg::Vec3(1, 0, 0));
normals->push_back(osg::Vec3(-1, 0, 0));
normals->push_back(osg::Vec3(-1, 0, 0));
normals->push_back(osg::Vec3(0, 0, 1));
normals->push_back(osg::Vec3(0, 0, 1));
double w = pw - mwp;
double h = phm - mh;
double norm = std::sqrt(w*w + h*h);
normals->push_back(osg::Vec3(h/norm, 0, -w/norm));
normals->push_back(osg::Vec3(h/norm, 0, -w/norm));
normals->push_back(osg::Vec3(0, 1, 0));
normals->push_back(osg::Vec3(0, 1, 0));
normals->push_back(osg::Vec3(0, 1, 0));
normals->push_back(osg::Vec3(0, 1, 0));
normals->push_back(osg::Vec3(0, 1, 0));
normals->push_back(osg::Vec3(0, -1, 0));
normals->push_back(osg::Vec3(0, -1, 0));
normals->push_back(osg::Vec3(0, -1, 0));
normals->push_back(osg::Vec3(0, -1, 0));
normals->push_back(osg::Vec3(0, -1, 0));
// Match normals
tileGeometry->setNormalArray(normals);
tileGeometry->setNormalBinding(osg::Geometry::BIND_PER_PRIMITIVE);
// Define tile 18 GL_TRIANGLES with 20*3 vertices
tileGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::TRIANGLES, 0, 18*3));
// Return the tile whithout plot
return tileGeometry.release();
}
osg::Drawable *ClampNode::createBrick(void) const {
// Get the brick
Clamp* clamp = static_cast<Clamp*>(_lego);
// Get brick color
QColor color = clamp->getColor();
// Get clamp bounding box
clamp->calculateBoundingBox();
BoundingBox bb = clamp->getBoundingBox();
// Get integer sizes
int width = bb.getWidth();
int length = bb.getLength();
int height = bb.getHeight();
// Get real position, according to tile size
double mw = (-width)*Lego::length_unit/2;
double mwpm = (-width)*Lego::length_unit/2+Lego::height_unit/2;
double mwp = (-width)*Lego::length_unit/2+0.93*Lego::height_unit;
double pw = (width)*Lego::length_unit/2;
double pwm = (width)*Lego::length_unit/2-Lego::height_unit/2;
double ml = (-length)*Lego::length_unit/2;
double mlp = (-length+0.5)*Lego::length_unit/2;
double pl = (length)*Lego::length_unit/2;
double plm = (length-0.5)*Lego::length_unit/2;
double mh = (-height)*Lego::height_unit/2;
double mhp = (-height)*Lego::height_unit/2+2*Lego::plot_top_height;
double mhpm = (-height)*Lego::height_unit/2+Lego::plot_top_height;
double phm = (height)*Lego::height_unit/2-Lego::height_unit/2;
double phmp = (height)*Lego::height_unit/2-0.5*Lego::height_unit/2;
// Create 3 vertices
osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
osg::Vec3 v0(ml, mw, mh);
osg::Vec3 v1(pl, mw, mh);
osg::Vec3 v2(pl, pw, mh);
osg::Vec3 v3(ml, pw, mh);
osg::Vec3 v4(ml, pw, mhp);
osg::Vec3 v5(pl, pw, mhp);
osg::Vec3 v6(pl, mw, mhp);
osg::Vec3 v7(ml, mw, mhp);
osg::Vec3 v8(mlp, mw, mhp);
osg::Vec3 v9(mlp, mw, phm);
osg::Vec3 v10(ml, mw, phm);
osg::Vec3 v11(ml, mwp, phmp);
osg::Vec3 v12(mlp, mwp, phmp);
osg::Vec3 v13(mlp, pw, mhp);
osg::Vec3 v14(plm, mw, mhp);
osg::Vec3 v15(plm, mw, phm);
osg::Vec3 v16(pl, mw, phm);
osg::Vec3 v17(pl, mwp, phmp);
osg::Vec3 v18(plm, mwp, phmp);
osg::Vec3 v19(plm, pw, mhp);
osg::Vec3 v20(mlp, mwpm, mh);
osg::Vec3 v21(plm, mwpm, mh);
osg::Vec3 v22(plm, pwm, mh);
osg::Vec3 v23(mlp, pwm, mh);
osg::Vec3 v24(mlp, mwpm, mhpm);
osg::Vec3 v25(plm, mwpm, mhpm);
osg::Vec3 v26(plm, pwm, mhpm);
osg::Vec3 v27(mlp, pwm, mhpm);
// Create 1 faces, 0 faces are quads splitted into two triangles
// NB: Down face is transparent, we don't even create it
// Bottom
vertices->push_back(v3);
vertices->push_back(v2);
vertices->push_back(v1);
vertices->push_back(v0);
// Bottom hole
vertices->push_back(v20);
vertices->push_back(v21);
vertices->push_back(v22);
vertices->push_back(v23);
// Bottom far
vertices->push_back(v24);
vertices->push_back(v25);
vertices->push_back(v26);
vertices->push_back(v27);
// Front face
vertices->push_back(v2);
vertices->push_back(v3);
vertices->push_back(v4);
vertices->push_back(v5);
// Back face
vertices->push_back(v0);
vertices->push_back(v1);
vertices->push_back(v6);
vertices->push_back(v7);
// Left bottom face
vertices->push_back(v0);
vertices->push_back(v3);
vertices->push_back(v4);
vertices->push_back(v7);
// Right bottom face
vertices->push_back(v1);
vertices->push_back(v2);
vertices->push_back(v5);
vertices->push_back(v6);
// Top face
vertices->push_back(v4);
vertices->push_back(v5);
vertices->push_back(v6);
vertices->push_back(v7);
// Left part back
vertices->push_back(v7);
vertices->push_back(v8);
vertices->push_back(v9);
vertices->push_back(v10);
// Left part left ext
vertices->push_back(v4);
vertices->push_back(v7);
vertices->push_back(v10);
vertices->push_back(v11);
// Left part front
vertices->push_back(v4);
vertices->push_back(v11);
vertices->push_back(v12);
vertices->push_back(v13);
// Left part left int
vertices->push_back(v8);
vertices->push_back(v9);
vertices->push_back(v12);
vertices->push_back(v13);
// Right part back
vertices->push_back(v6);
vertices->push_back(v14);
vertices->push_back(v15);
vertices->push_back(v16);
// Left part left ext
vertices->push_back(v5);
vertices->push_back(v6);
vertices->push_back(v16);
vertices->push_back(v17);
// Left part front
vertices->push_back(v5);
vertices->push_back(v17);
vertices->push_back(v18);
vertices->push_back(v19);
// Left part left int
vertices->push_back(v14);
vertices->push_back(v15);
vertices->push_back(v18);
vertices->push_back(v19);
// Bottom front
vertices->push_back(v20);
vertices->push_back(v21);
vertices->push_back(v25);
vertices->push_back(v24);
// Bottom right
vertices->push_back(v21);
vertices->push_back(v22);
vertices->push_back(v26);
vertices->push_back(v25);
// Bottom back
vertices->push_back(v22);
vertices->push_back(v23);
vertices->push_back(v27);
vertices->push_back(v26);
// Bottom left
vertices->push_back(v23);
vertices->push_back(v20);
vertices->push_back(v24);
vertices->push_back(v27);
// Create tile geometry
osg::ref_ptr<osg::Geometry> clampGeometry = new osg::Geometry;
// Match vertices
clampGeometry->setVertexArray(vertices);
// Create colors
osg::Vec4 osgColor(static_cast<float>(color.red())/255.0, static_cast<float>(color.green())/255.0, static_cast<float>(color.blue())/255.0, 1.0);
osg::ref_ptr<osg::Vec4Array> colors = new osg::Vec4Array;
// Every face has the same color, so there is only one color
colors->push_back(osgColor);
// Match color
clampGeometry->setColorArray(colors);
clampGeometry->setColorBinding(osg::Geometry::BIND_OVERALL);
// Create normals
osg::ref_ptr<osg::Vec3Array> normals = new osg::Vec3Array;
normals->push_back(osg::Vec3(0, 0, -1));
normals->push_back(osg::Vec3(0, 0, -1));
normals->push_back(osg::Vec3(0, 1, 0));
normals->push_back(osg::Vec3(0, -1, 0));
normals->push_back(osg::Vec3(-1, 0, 0));
normals->push_back(osg::Vec3(1, 0, 0));
normals->push_back(osg::Vec3(0, 0, 1));
normals->push_back(osg::Vec3(0, -1, 0));
normals->push_back(osg::Vec3(-1, 0, 0));
double w = pw - mwp;
double h = phmp - mhp;
double norm = std::sqrt(w*w + h*h);
normals->push_back(osg::Vec3(0, h/norm, w/norm));
normals->push_back(osg::Vec3(1, 0, 0));
normals->push_back(osg::Vec3(0, -1, 0));
normals->push_back(osg::Vec3(1, 0, 0));
normals->push_back(osg::Vec3(0, h/norm, w/norm));
normals->push_back(osg::Vec3(-1, 0, 0));
normals->push_back(osg::Vec3(0, 1, 0));
normals->push_back(osg::Vec3(-1, 0, 0));
normals->push_back(osg::Vec3(0, -1, 0));
normals->push_back(osg::Vec3(1, 0, 0));
// Match normals
clampGeometry->setNormalArray(normals);
clampGeometry->setNormalBinding(osg::Geometry::BIND_PER_PRIMITIVE);
// Define 1 GL_QUADS with 1*4 vertices, corresponding to bottom part
clampGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0*4, 4));
// Define 1 GL_QUADS with 1*4 vertices, corresponding to 1 hole in bottom part
clampGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 1*4, 4));
// Retesslate to create hole
osgUtil::Tessellator tesslator;
tesslator.setTessellationType(osgUtil::Tessellator::TESS_TYPE_GEOMETRY);
tesslator.setWindingType(osgUtil::Tessellator::TESS_WINDING_ODD);
tesslator.retessellatePolygons(*clampGeometry);
// Create 17 GL_QUADS, i.e. 18*4 vertices
clampGeometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 2*4, 18*4));
// Return the tile whithout plot
return clampGeometry.release();
}