bool CCCameraBase::project3D(float x, float y)
{
if( frameBufferID == -1 )
{
CCAppManager::CorrectOrientation( x, y );
}
x *= viewport[2];
x += viewport[0];
y *= viewport[3];
y += viewport[1];
if( GluUnProject( x, y, 0.0f, projectionResults.vNear ) &&
GluUnProject( x, y, 1.0f, projectionResults.vFar ) )
{
// Figure out our ray's direction
projectionResults.vDirection = projectionResults.vFar;
projectionResults.vDirection.sub( projectionResults.vNear );
projectionResults.vDirection.unitize();
projectionResults.vLookAt = projectionResults.vNear;
CCVector3 projectionOffset = CCVector3MulResult( projectionResults.vDirection, projectionResults.vNear.z );
projectionResults.vLookAt.add( projectionOffset );
return true;
}
return false;
}
const bool CCCameraBase::project3D(float x, float y)
{
gEngine->renderer->correctOrientation( x, y );
x *= viewport[2];
y *= viewport[3];
y += viewport[1];
if( GluUnProject( x, y, 0.0f, projection.vNear ) &&
GluUnProject( x, y, 1.0f, projection.vFar ) )
{
// Figure out our ray's direction
projection.vDirection = projection.vFar;
projection.vDirection.sub( projection.vNear );
projection.vDirection.unitize();
projection.vLookAt = projection.vNear;
CCVector3 projectionOffset = CCVector3MulResult( projection.vDirection, projection.vNear.z );
projection.vLookAt.add( projectionOffset );
return true;
}
return false;
}
void CCCameraBase::project3DZ(CCVector3 *result, float x, float y, float offset)
{
if( project3D( x, y ) )
{
// Cast the ray from our near plane
if( offset == -1.0f )
{
offset = projectionResults.vNear.z / fabsf( projectionResults.vDirection.z );
}
*result = CCVector3MulResult( projectionResults.vDirection, offset );
result->add( projectionResults.vNear );
}
}