Node *makeTrees( void )
{
Group *group = new Group;
int i;
getDatabaseCenterRadius( dbcenter, &dbradius );
struct _tree *t;
Texture2D *tex = new Texture2D;
tex->setImage(osgDB::readImageFile("Images/tree0.rgba"));
StateSet *dstate = new StateSet;
dstate->setTextureAttributeAndModes(0, tex, StateAttribute::ON );
dstate->setTextureAttribute(0, new TexEnv );
dstate->setAttributeAndModes( new BlendFunc, StateAttribute::ON );
AlphaFunc* alphaFunc = new AlphaFunc;
alphaFunc->setFunction(AlphaFunc::GEQUAL,0.05f);
dstate->setAttributeAndModes( alphaFunc, StateAttribute::ON );
dstate->setMode( GL_LIGHTING, StateAttribute::OFF );
dstate->setRenderingHint( StateSet::TRANSPARENT_BIN );
int tt[] = { 15, 30, 45, 58, 72, 75, 93, 96, 105, -1 };
int *ttp = tt;
i = 0;
while( i < 105 )
{
ttx = trees[i].x;
tty = trees[i].y;
qsort( &trees[i], 105 - i, sizeof( _tree ), ct );
i += *ttp;
ttp++;
}
t = trees;
i = 0;
ttp = tt;
while( *ttp != -1 )
{
Billboard *bb = new Billboard;
//int starti = i;
for( ; i < (*ttp); i++ )
{
t->x -= 0.3f;
float h = Hat(t->x, t->y, t->z );
Vec3 pos( t->x, t->y, t->z-h );
Geometry *geom = makeTree( t, dstate );
bb->addDrawable( geom, pos );
t++;
}
group->addChild( bb );
ttp++;
}
return group;
}
Node *makeTank( void )
{
Geode *geode = new Geode;
getDatabaseCenterRadius( dbcenter, &dbradius );
Matrix mat(
0.05, 0, 0, 0,
0, 0.05, 0, 0,
0, 0, 0.05, 0,
1.5999 - 0.3,
3.1474,
dbcenter[2] + 0.6542 - 0.09,
1
);
// 42 required for sides, 22 for the top.
Vec3Array& vc = *(new Vec3Array(42+22));
Vec2Array& tc = *(new Vec2Array(42+22));
Geometry *gset = new Geometry;
gset->setVertexArray( &vc );
gset->setTexCoordArray( 0, &tc );
// create the sides of the tank.
unsigned int i, c = 0;
for( i = 0; i <= 360; i += 18 )
{
float x, y, z;
float s, t;
float theta = osg::DegreesToRadians((float)i);
s = (float)i/90.0;
t = 1.0;
x = radius * cosf( theta );
y = radius * sinf( theta );
z = 1.0;
vc[c][0] = x;
vc[c][1] = y;
vc[c][2] = z;
tc[c][0] = s;
tc[c][1] = t;
c++;
t = 0.0;
z = 0.0;
vc[c][0] = x;
vc[c][1] = y;
vc[c][2] = z;
tc[c][0] = s;
tc[c][1] = t;
c++;
}
gset->addPrimitiveSet( new DrawArrays(PrimitiveSet::TRIANGLE_STRIP,0,c) );
// create the top of the tank.
int prev_c = c;
vc[c][0] = 0.0f;
vc[c][1] = 0.0f;
vc[c][2] = 1.0f;
tc[c][0] = 0.0f;
tc[c][1] = 0.0f;
c++;
for( i = 0; i <= 360; i += 18 )
{
float x, y, z;
float s, t;
float theta = osg::DegreesToRadians((float)i);
// s = (float)i/360.0;
// t = 1.0;
s = cosf( theta );
t = sinf( theta );
x = radius * cosf( theta );
y = radius * sinf( theta );
z = 1.0;
vc[c][0] = x;
vc[c][1] = y;
vc[c][2] = z;
tc[c][0] = s;
tc[c][1] = t;
c++;
}
for( i = 0; i < c; i++ )
conv( vc[i], mat, vc[i] );
gset->addPrimitiveSet(new DrawArrays(PrimitiveSet::TRIANGLE_FAN,prev_c,c-prev_c));
Texture2D *tex = new Texture2D;
tex->setWrap( Texture2D::WRAP_S, Texture2D::REPEAT );
tex->setWrap( Texture2D::WRAP_T, Texture2D::REPEAT );
tex->setImage(osgDB::readImageFile("Images/tank.rgb"));
StateSet *dstate = new StateSet;
dstate->setTextureAttributeAndModes(0, tex, StateAttribute::ON );
dstate->setTextureAttribute(0, new TexEnv );
gset->setStateSet( dstate );
geode->addDrawable( gset );
return geode;
}
Node *makeSky( void )
{
int i, j;
float lev[] = { -5, -1.0, 1.0, 15.0, 30.0, 60.0, 90.0 };
float cc[][4] =
{
{ 0.0, 0.0, 0.15 },
{ 0.0, 0.0, 0.15 },
{ 0.4, 0.4, 0.7 },
{ 0.2, 0.2, 0.6 },
{ 0.1, 0.1, 0.6 },
{ 0.1, 0.1, 0.6 },
{ 0.1, 0.1, 0.6 },
};
float x, y, z;
float alpha, theta;
float radius = 20.0f;
int nlev = sizeof( lev )/sizeof(float);
Geometry *geom = new Geometry;
Vec3Array& coords = *(new Vec3Array(19*nlev));
Vec4Array& colors = *(new Vec4Array(19*nlev));
Vec2Array& tcoords = *(new Vec2Array(19*nlev));
int ci = 0;
for( i = 0; i < nlev; i++ )
{
for( j = 0; j <= 18; j++ )
{
alpha = osg::DegreesToRadians(lev[i]);
theta = osg::DegreesToRadians((float)(j*20));
x = radius * cosf( alpha ) * cosf( theta );
y = radius * cosf( alpha ) * -sinf( theta );
z = radius * sinf( alpha );
coords[ci][0] = x;
coords[ci][1] = y;
coords[ci][2] = z;
colors[ci][0] = cc[i][0];
colors[ci][1] = cc[i][1];
colors[ci][2] = cc[i][2];
colors[ci][3] = 1.0;
tcoords[ci][0] = (float)j/18.0;
tcoords[ci][1] = (float)i/(float)(nlev-1);
ci++;
}
}
for( i = 0; i < nlev-1; i++ )
{
DrawElementsUShort* drawElements = new DrawElementsUShort(PrimitiveSet::TRIANGLE_STRIP);
drawElements->reserve(38);
for( j = 0; j <= 18; j++ )
{
drawElements->push_back((i+1)*19+j);
drawElements->push_back((i+0)*19+j);
}
geom->addPrimitiveSet(drawElements);
}
geom->setVertexArray( &coords );
geom->setTexCoordArray( 0, &tcoords );
geom->setColorArray( &colors );
geom->setColorBinding( Geometry::BIND_PER_VERTEX );
Texture2D *tex = new Texture2D;
tex->setImage(osgDB::readImageFile("Images/white.rgb"));
StateSet *dstate = new StateSet;
dstate->setTextureAttributeAndModes(0, tex, StateAttribute::OFF );
dstate->setTextureAttribute(0, new TexEnv );
dstate->setMode( GL_LIGHTING, StateAttribute::OFF );
dstate->setMode( GL_CULL_FACE, StateAttribute::ON );
// clear the depth to the far plane.
osg::Depth* depth = new osg::Depth;
depth->setFunction(osg::Depth::ALWAYS);
depth->setRange(1.0,1.0);
dstate->setAttributeAndModes(depth,StateAttribute::ON );
dstate->setRenderBinDetails(-2,"RenderBin");
geom->setStateSet( dstate );
Geode *geode = new Geode;
geode->addDrawable( geom );
geode->setName( "Sky" );
return geode;
}
Node *makeTerrain( void )
{
int m, n;
int i, j;
float dbcenter[3];
float dbradius;
getDatabaseCenterRadius( dbcenter, &dbradius );
m = (sizeof( vertex ) /(sizeof( float[3])))/39;
n = 39;
Vec3Array& v = *(new Vec3Array(m*n));
Vec2Array& t = *(new Vec2Array(m*n));
Vec4Array& col = *(new Vec4Array(1));
col[0][0] = col[0][1] = col[0][2] = col[0][3] = 1.0f;
for( i = 0; i < m * n; i++ )
{
float* vc = vertex[i];
v[i][0] = vc[0] - dbcenter[0];
v[i][1] = vc[1] - dbcenter[1];
v[i][2] = vc[2];
float* tc = texcoord[i];
t[i][0] = tc[0];
t[i][1] = tc[1];
}
Geometry *geom = new Geometry;
geom->setVertexArray( &v );
geom->setTexCoordArray( 0, &t );
geom->setColorArray( &col, Array::BIND_OVERALL );
for( i = 0; i < m-2; i++ )
{
DrawElementsUShort* elements = new DrawElementsUShort(PrimitiveSet::TRIANGLE_STRIP);
elements->reserve(39*2);
for( j = 0; j < n; j++ )
{
elements->push_back((i+0)*n+j);
elements->push_back((i+1)*n+j);
}
geom->addPrimitiveSet(elements);
}
Texture2D *tex = new Texture2D;
tex->setImage(osgDB::readRefImageFile("Images/lz.rgb"));
StateSet *dstate = new StateSet;
dstate->setMode( GL_LIGHTING, StateAttribute::OFF );
dstate->setTextureAttributeAndModes(0, tex, StateAttribute::ON );
dstate->setTextureAttribute(0, new TexEnv );
geom->setStateSet( dstate );
Geode *geode = new Geode;
geode->addDrawable( geom );
return geode;
}
