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Added local transform support. Fixed skirt generation to work during geocentric

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transformations. Fixed output of image files so that compressed textures are
turned off when external image files are required.
This commit is contained in:
Robert Osfield
2004-04-05 15:39:33 +00:00
parent 2efea80728
commit 01cbfd6715
2 changed files with 167 additions and 57 deletions
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45
include/osgTerrain/CoordinateSystem
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@@ -17,6 +17,7 @@
#include <osg/Object>
#include <osg/Vec2>
#include <osg/Vec3>
#include <osg/Matrixd>
#include <osgTerrain/Export>
@@ -79,6 +80,50 @@ class EllipsodeTransform
height = p/cos(latitude) - N;
}
inline void computeLocalToWorldTransform(double latitude, double longitude, double height, osg::Matrixd& localToWorld) const
{
double X, Y, Z;
convertLatLongHeightToXYZ(latitude,longitude,height,X,Y,Z);
localToWorld.makeTranslate(X,Y,Z);
// normalize X,Y,Z
double inverse_length = 1.0/sqrt(X*X + Y*Y + Z*Z);
X *= inverse_length;
Y *= inverse_length;
Z *= inverse_length;
double length_XY = sqrt(X*X + Y*Y);
double inverse_length_XY = 1.0/length_XY;
// Vx = |(-Y,X,0)|
localToWorld(0,0) = -Y*inverse_length_XY;
localToWorld(0,1) = X*inverse_length_XY;
localToWorld(0,2) = 0.0;
// Vy = /(-Z*X/(sqrt(X*X+Y*Y), -Z*Y/(sqrt(X*X+Y*Y),sqrt(X*X+Y*Y))|
double Vy_x = -Z*X*inverse_length_XY;
double Vy_y = -Z*Y*inverse_length_XY;
double Vy_z = length_XY;
inverse_length = 1.0/sqrt(Vy_x*Vy_x + Vy_y*Vy_y + Vy_z*Vy_z);
localToWorld(1,0) = Vy_x*inverse_length;
localToWorld(1,1) = Vy_y*inverse_length;
localToWorld(1,2) = Vy_z*inverse_length;
// Vz = (X,Y,Z)
localToWorld(2,0) = X;
localToWorld(2,1) = Y;
localToWorld(2,2) = Z;
}
osg::Vec3 computeGavitationVector(double X, double Y, double Z) const
{
osg::Vec3 normal(-X,-Y,-Z);
normal.normalize();
return normal;
}
protected:
void computeCoefficients()