osg::Geometry* ShapeVisitor_VisualizerCreator::createGridGeometry( int size, int noOfLines, osg::Vec3f center )
{
osg::Geometry* geom = new osg::Geometry();
osg::Vec3Array* positionsOfLines = new osg::Vec3Array;
geom->setVertexArray( positionsOfLines );
// position of borders
osg::Vec3f dif1( ( osg::Vec3f::value_type )( -size/2 ), ( osg::Vec3f::value_type )( size/2 ), -10 ); // top left
osg::Vec3f dif2( ( osg::Vec3f::value_type )( -size/2 ), ( osg::Vec3f::value_type )( -size/2 ), -10 );
osg::Vec3f dif3( ( osg::Vec3f::value_type )( size/2 ), ( osg::Vec3f::value_type )( size/2 ), -10 );
// increment for creating points of mesh at border
osg::Vec3f incrementX( ( osg::Vec3f::value_type )( size/noOfLines ), 0, 0 );
osg::Vec3f incrementY( 0, ( osg::Vec3f::value_type )( -size/noOfLines ), 0 );
// computing and saving positions of points at border of mesh
for ( int i=0; i<2; i++ ) {
osg::Vec3f base1 = center + dif1;
osg::Vec3f base2 = center + dif2;
// computing positions at x axis
for ( int j=0; j<noOfLines; j++ ) {
positionsOfLines->push_back( base1 + incrementX );
base1 += incrementX;
positionsOfLines->push_back( base2 + incrementX + incrementY );
base2 += incrementX;
}
base1 = center + dif1;
base2 = center + dif3;
// computing positions at y axis
for ( int j=0; j<noOfLines; j++ ) {
positionsOfLines->push_back( base1 + incrementY );
base1 += incrementY;
positionsOfLines->push_back( base2 + incrementY + incrementX );
base2 += incrementY;
}
// connecting two corresponding points at border of mesh
for ( int k=0; k<noOfLines*4; k=k+2 ) {
osg::DrawElementsUInt* line = new osg::DrawElementsUInt( osg::PrimitiveSet::LINES, 0 );
line->push_back( k );
line->push_back( k+1 );
geom->addPrimitiveSet( line );
}
}
return geom;
}
void CSmokeTrailProjectile::Draw()
{
inArray=true;
float age=gs->frameNum+gu->timeOffset-creationTime;
if(drawTrail){
float3 dif(pos1-camera->pos2);
dif.Normalize();
float3 odir1(dif.cross(dir1));
odir1.Normalize();
float3 dif2(pos2-camera->pos2);
dif2.Normalize();
float3 odir2(dif2.cross(dir2));
odir2.Normalize();
unsigned char col[4];
float a1=(1-float(age)/(lifeTime))*255;
if(lastSegment)
a1=0;
a1*=0.7f+fabs(dif.dot(dir1));
float alpha=min(255.f,max(0.f,a1));
col[0]=(unsigned char) (color*alpha);
col[1]=(unsigned char) (color*alpha);
col[2]=(unsigned char) (color*alpha);
col[3]=(unsigned char)alpha;
unsigned char col2[4];
float a2=(1-float(age+8)/(lifeTime))*255;
if(firstSegment)
a2=0;
a2*=0.7f+fabs(dif2.dot(dir2));
alpha=min(255.f,max(0.f,a2));
col2[0]=(unsigned char) (color*alpha);
col2[1]=(unsigned char) (color*alpha);
col2[2]=(unsigned char) (color*alpha);
col2[3]=(unsigned char)alpha;
float size=1+(age*(1.0f/lifeTime))*orgSize;
float size2=1+((age+8)*(1.0f/lifeTime))*orgSize;
if(drawSegmented){
float3 dif3(midpos-camera->pos2);
dif3.Normalize();
float3 odir3(dif3.cross(middir));
odir3.Normalize();
float size3=0.2f+((age+4)*(1.0f/lifeTime))*orgSize;
unsigned char col3[4];
float a2=(1-float(age+4)/(lifeTime))*255;
a2*=0.7f+fabs(dif3.dot(middir));
alpha=min(255.f,max(0.f,a2));
col3[0]=(unsigned char) (color*alpha);
col3[1]=(unsigned char) (color*alpha);
col3[2]=(unsigned char) (color*alpha);
col3[3]=(unsigned char)alpha;
float midtexx = ph->smoketrailtex.xstart + (ph->smoketrailtex.xend - ph->smoketrailtex.xstart)*0.5f;
va->AddVertexTC(pos1-odir1*size,ph->smoketrailtex.xstart,ph->smoketrailtex.ystart,col);
va->AddVertexTC(pos1+odir1*size,ph->smoketrailtex.xstart,ph->smoketrailtex.yend,col);
va->AddVertexTC(midpos+odir3*size3,midtexx,ph->smoketrailtex.yend,col3);
va->AddVertexTC(midpos-odir3*size3,midtexx,ph->smoketrailtex.ystart,col3);
va->AddVertexTC(midpos-odir3*size3,midtexx,ph->smoketrailtex.ystart,col3);
va->AddVertexTC(midpos+odir3*size3,midtexx,ph->smoketrailtex.yend,col3);
va->AddVertexTC(pos2+odir2*size2,ph->smoketrailtex.xend,ph->smoketrailtex.yend,col2);
va->AddVertexTC(pos2-odir2*size2,ph->smoketrailtex.xend,ph->smoketrailtex.ystart,col2);
} else {
va->AddVertexTC(pos1-odir1*size,ph->smoketrailtex.xstart,ph->smoketrailtex.ystart,col);
va->AddVertexTC(pos1+odir1*size,ph->smoketrailtex.xstart,ph->smoketrailtex.yend,col);
va->AddVertexTC(pos2+odir2*size2,ph->smoketrailtex.xend,ph->smoketrailtex.yend,col2);
va->AddVertexTC(pos2-odir2*size2,ph->smoketrailtex.xend,ph->smoketrailtex.ystart,col2);
}
} else { //draw as particles
unsigned char col[4];
for(int a=0;a<8;++a){
float a1=1-float(age+a)/lifeTime;
float alpha=min(255.f,max(0.f,a1*255));
col[0]=(unsigned char) (color*alpha);
col[1]=(unsigned char) (color*alpha);
col[2]=(unsigned char) (color*alpha);
col[3]=(unsigned char)alpha;
float size=((0.2f+(age+a)*(1.0f/lifeTime))*orgSize)*1.2f;
float3 pos=CalcBeizer(a/8.0f,pos1,dirpos1,dirpos2,pos2);
va->AddVertexTC(pos1+( camera->up+camera->right)*size, ph->smoketex[0].xstart, ph->smoketex[0].ystart, col);
va->AddVertexTC(pos1+( camera->up-camera->right)*size, ph->smoketex[0].xend, ph->smoketex[0].ystart, col);
va->AddVertexTC(pos1+(-camera->up-camera->right)*size, ph->smoketex[0].xend, ph->smoketex[0].ystart, col);
va->AddVertexTC(pos1+(-camera->up+camera->right)*size, ph->smoketex[0].xstart, ph->smoketex[0].ystart, col);
}
}
if(drawCallbacker)
drawCallbacker->DrawCallback();
}
