Method SetupTransformsForPicking

trinity/ITr2PickableScene.cpp:177–192

-------------------------------------------------------------------------------------- Description: Sets view and projection transform to be used for picking. Arguments: fx - X offset of the frustum in post-projected space fy - Y offset of the frustum in post-projected space proj - Current projection transform view - Current view transform viewport - Current viewport ------------------------------

//   viewport - Current viewport
// --------------------------------------------------------------------------------------
void ITr2PickableScene::SetupTransformsForPicking( float fx, float fy, TriProjection* proj, TriView* view, TriViewport* viewport )
{
	Tr2Renderer::SetViewTransform( view->GetTransform() );
	proj->SetProjection();
	//
	// Projection is set up to scale the image such that the viewport is covered by one pixel.
	Vector2 scaling( float( viewport->width ), float( viewport->height ) );
	// translate the projection so that we center around the pick ray origin,
	// while remembering to scale this value as well:
	Vector2 translation;
	translation.x = -fx * scaling.x;
	translation.y = -fy * scaling.y;
	Tr2Renderer::AdjustProjection( scaling, translation );

	// We do NOT set the viewport here. It will get set automatically when SetRenderTarget is called.
}

// --------------------------------------------------------------------------------------
// Description: