//----------------------------------------------------------------------------------------------
ChsVector3 screenToVector( float scrX, float scrY )const{
// Scale to screen
float x = (scrX - this->halfScreenWidth ) / (this->radius * this->halfScreenWidth );
float y = -(scrY -this->halfScreenHeight ) / (this->radius * this->halfScreenHeight );
float z = 0.0f;
float mag = x * x + y * y;
if( mag > 1.0f ) {
float scale = 1.0f/sqrtf(mag);
x *= scale;
y *= scale;
}
else{
z = sqrtf( 1.0f - mag );
}
// Return vector
return ChsVector3( x, y, z );
}
//----------------------------------------------------------------------------------------------
ChsVector3 ChsVector3::operator / ( float scale )const{
assert( scale != 0 );
return ChsVector3( this->x / scale, this->y / scale, this->z / scale );
}
//----------------------------------------------------------------------------------------------
ChsVector3 ChsVector3::operator - ( void )const{
return ChsVector3( -this->x, -this->y, -this->z );
}
//----------------------------------------------------------------------------------------------
ChsVector3 ChsVector3::operator * ( float scale )const{
return ChsVector3( this->x * scale, this->y * scale, this->z * scale );
}
//----------------------------------------------------------------------------------------------
ChsVector3 ChsVector3::cross( const ChsVector3 & vec1, const ChsVector3 & vec2 ){
return ChsVector3( vec1.y * vec2.z - vec2.y * vec1.z,
vec1.z * vec2.x - vec2.z * vec1.x,
vec1.x * vec2.y - vec2.x * vec1.y );
}
