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Working on generating standard size texture coordinates that can be scaled

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at runtime per the actual texture size.
This commit is contained in:
curt 1999-05-13 02:37:06 +00:00
parent 114a8dd157
commit 5e40c3dfb9
2 changed files with 30 additions and 8 deletions
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36
Tools/Construct/GenOutput/genobj.cxx
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@ -60,22 +60,43 @@ void FGGenOutput::calc_gbs( FGConstruct& c ) {
}
#define FG_TEX_CONSTANT 69.0
#define FG_STANDARD_TEXTURE_DIMENSION 1000.0 // meters
// traverse the specified fan and attempt to calculate "none
// stretching" texture coordinates
int_list FGGenOutput::calc_tex_coords( point_list geod_nodes, int_list fan ) {
int_list FGGenOutput::calc_tex_coords( FGConstruct& c, point_list geod_nodes,
int_list fan )
{
// cout << "calculating texture coordinates for a specific fan of size = "
// << fan.size() << endl;
FGBucket b = c.get_bucket();
double clat = b.get_center_lat();
double clat_rad = clat * DEG_TO_RAD;
double cos_lat = cos( clat_rad );
double local_radius = cos_lat * EQUATORIAL_RADIUS_M;
double local_perimeter = 2.0 * local_radius * FG_PI;
double degree_width = local_perimeter / 360.0;
// cout << "clat = " << clat << endl;
// cout << "clat (radians) = " << clat_rad << endl;
// cout << "cos(lat) = " << cos_lat << endl;
// cout << "local_radius = " << local_radius << endl;
// cout << "local_perimeter = " << local_perimeter << endl;
// cout << "degree_width = " << degree_width << endl;
double perimeter = 2.0 * EQUATORIAL_RADIUS_M * FG_PI;
double degree_height = perimeter / 360.0;
// cout << "degree_height = " << degree_height << endl;
// find min/max of fan
Point3D min, max, p, t;
bool first = true;
for ( int i = 0; i < (int)fan.size(); ++i ) {
p = geod_nodes[ fan[i] ];
t.setx( p.x() * FG_TEX_CONSTANT );
t.sety( p.y() * FG_TEX_CONSTANT );
t.setx( p.x() * ( degree_width / FG_STANDARD_TEXTURE_DIMENSION ) );
t.sety( p.y() * ( degree_height / FG_STANDARD_TEXTURE_DIMENSION ) );
if ( first ) {
min = max = t;
@ -106,8 +127,8 @@ int_list FGGenOutput::calc_tex_coords( point_list geod_nodes, int_list fan ) {
tex.clear();
for ( int i = 0; i < (int)fan.size(); ++i ) {
p = geod_nodes[ fan[i] ];
t.setx( p.x() * FG_TEX_CONSTANT );
t.sety( p.y() * FG_TEX_CONSTANT );
t.setx( p.x() * ( degree_width / FG_STANDARD_TEXTURE_DIMENSION ) );
t.sety( p.y() * ( degree_height / FG_STANDARD_TEXTURE_DIMENSION ) );
shifted_t = t - min;
if ( shifted_t.x() < FG_EPSILON ) {
shifted_t.setx( 0.0 );
@ -116,6 +137,7 @@ int_list FGGenOutput::calc_tex_coords( point_list geod_nodes, int_list fan ) {
shifted_t.sety( 0.0 );
}
shifted_t.setz( 0.0 );
// cout << "shifted_t = " << shifted_t << endl;
index = tex_coords.unique_add( shifted_t );
tex.push_back( index );
}
@ -163,7 +185,7 @@ int FGGenOutput::build( FGConstruct& c ) {
for ( int i = 0; i < FG_MAX_AREA_TYPES; ++i ) {
for ( int j = 0; j < (int)fans[i].size(); ++j ) {
int_list t_list = calc_tex_coords( geod_nodes, fans[i][j] );
int_list t_list = calc_tex_coords( c, geod_nodes, fans[i][j] );
// cout << fans[i][j].size() << " === "
// << t_list.size() << endl;
textures[i].push_back( t_list );

2
Tools/Construct/GenOutput/genobj.hxx
View file

@ -89,7 +89,7 @@ private:
// traverse the specified fan and attempt to calculate "none
// stretching" texture coordinates
int_list calc_tex_coords( point_list geod_nodes, int_list fan );
int_list calc_tex_coords( FGConstruct& c, point_list geod_nodes, int_list fan );
public: