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/***********************************************************************
FONCTION :
----------
Classe V3d_SpotLight :
HISTORIQUE DES MODIFICATIONS :
--------------------------------
00-09-92 : GG ; Creation.
30-03-98 : ZOV ; PRO6774 (reconstruction of the class hierarchy and suppressing useless methods)
IMP230300: GG Add SetColor() and Color() methods
IMP231100: GG Add IsDisplayed() method
************************************************************************/
/*----------------------------------------------------------------------*/
/*
* Includes
*/
#include <V3d.hxx>
#include <V3d_Light.ixx>
//-Declarations
//-Aliases
//-Global data definitions
//-Local data definitions
//-Constructors
V3d_Light::V3d_Light(const Handle(V3d_Viewer)& VM) {
MyType = V3d_AMBIENT ;
VM->AddLight(this) ;
}
//-Methods, in order
Handle(Visual3d_Light) V3d_Light::Light() const {
return MyLight ;
}
void V3d_Light::SetColor(const Quantity_TypeOfColor Type, const Standard_Real v1, const Standard_Real v2, const Standard_Real v3) {
Standard_Real V1 = v1 ;
Standard_Real V2 = v2 ;
Standard_Real V3 = v3 ;
if( V1 < 0. ) V1 = 0. ; else if( V1 > 1. ) V1 = 1. ;
if( V2 < 0. ) V2 = 0. ; else if( V2 > 1. ) V2 = 1. ;
if( V3 < 0. ) V3 = 0. ; else if( V3 > 1. ) V3 = 1. ;
Quantity_Color C(V1,V2,V3,Type) ;
MyLight->SetColor(C) ;
}
void V3d_Light::SetColor(const Quantity_NameOfColor Name) {
Quantity_Color C(Name) ;
MyLight->SetColor(C) ;
}
void V3d_Light::SetColor(const Quantity_Color& aColor) {
MyLight->SetColor(aColor) ;
}
void V3d_Light::Color(const Quantity_TypeOfColor Type, Standard_Real& V1, Standard_Real& V2, Standard_Real& V3) const {
Quantity_Color C ;
C = MyLight->Color() ;
C.Values(V1,V2,V3,Type) ;
}
void V3d_Light::Color(Quantity_NameOfColor& Name) const{
Quantity_Color C ;
C = MyLight->Color() ;
Name = C.Name();
}
Quantity_Color V3d_Light::Color() const{
return MyLight->Color();
}
V3d_TypeOfLight V3d_Light::Type() const {
return MyType;
}
Standard_Boolean V3d_Light::Headlight() const {
return MyLight->Headlight();
}
void V3d_Light::SymetricPointOnSphere (const Handle(V3d_View)& aView, const Graphic3d_Vertex &Center, const Graphic3d_Vertex &aPoint, const Standard_Real Rayon, Standard_Real& X, Standard_Real& Y, Standard_Real& Z, Standard_Real& VX, Standard_Real& VY, Standard_Real& VZ ) {
Standard_Real X0,Y0,Z0,XP,YP,ZP;
Standard_Real PXP,PYP,DeltaX,DeltaY,DeltaZ;
Standard_Real A,B,C,Delta,Lambda;
Standard_Integer IPX,IPY;
Center.Coord(X0,Y0,Z0);
aPoint.Coord(XP,YP,ZP);
aView->Project(XP,YP,ZP,PXP,PYP);
aView->Convert(PXP,PYP,IPX,IPY);
aView->ProjReferenceAxe(IPX,IPY,X,Y,Z,VX,VY,VZ);
DeltaX = X0 - XP;
DeltaY = Y0 - YP;
DeltaZ = Z0 - ZP;
// The point of intersection of straight lines defined by :
// - Straight line passing by the point of projection and the eye
// if this is a perspective, parralel to the normal of the view
// if this is an axonometric view.
// position in the view is parallel to the normal of the view
// - The distance position of the target camera is equal to the radius.
A = VX*VX + VY*VY + VZ*VZ ;
B = -2. * (VX*DeltaX + VY*DeltaY + VZ*DeltaZ);
C = DeltaX*DeltaX + DeltaY*DeltaY + DeltaZ*DeltaZ
- Rayon*Rayon ;
Delta = B*B - 4.*A*C;
if ( Delta >= 0 ) {
Lambda = (-B + Sqrt(Delta))/(2.*A);
if ( Lambda >= -0.0001 && Lambda <= 0.0001 )
Lambda = (-B - Sqrt(Delta))/(2.*A);
X = XP + Lambda*VX;
Y = YP + Lambda*VY;
Z = ZP + Lambda*VZ;
}
else {
X = XP; Y = YP; Z = ZP;
}
}
Standard_Boolean V3d_Light::IsDisplayed() const {
if( MyGraphicStructure.IsNull() ) return Standard_False;
return MyGraphicStructure->IsDisplayed();
}
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