Method manipulateGridPlane

Source/RenderPasses/SDFEditor/SDFEditor.cpp:389–456

}

void SDFEditor::manipulateGridPlane(
    SDFGridPlane& gridPlane,
    SDFGridPlane& previousGridPlane,
    bool isTranslationKeyDown,
    bool isConstrainedManipulationKeyDown
)
{
    float2 diffPrev = mUI2D.currentMousePosition - mUI2D.prevMousePosition;
    float2 diffStart = mUI2D.currentMousePosition - mUI2D.startMousePosition;
    float3 up = mpCamera->getUpVector();
    float3 view = normalize(mpCamera->getTarget() - mpCamera->getPosition());
    float3 right = cross(view, up);

    if (!isTranslationKeyDown) // The user wants rotation of the grid plane.
    {
        if (!isConstrainedManipulationKeyDown) // Rotate plane arbitrarily along right and up vectors.
        {
            // Rotate plane around the right vector.
            rotateGridPlane(
                diffPrev.y, right, previousGridPlane.normal, previousGridPlane.rightVector, gridPlane.normal, gridPlane.rightVector
            );
            // Rotate plane around the up vector.
            rotateGridPlane(diffPrev.x, up, gridPlane.normal, gridPlane.rightVector, gridPlane.normal, gridPlane.rightVector);
            previousGridPlane = gridPlane;
        }
        else // Constraind rotation to the axis with most movement since shift was pressed.
        {
            if (std::abs(diffStart.y) > std::abs(diffStart.x)) // Rotate plane only around the right vector.
            {
                rotateGridPlane(
                    diffStart.y,
                    right,
                    previousGridPlane.normal,
                    previousGridPlane.rightVector,
                    gridPlane.normal,
                    gridPlane.rightVector,
                    false
                );
            }
            else // Rotate plane only around the up vector.
            {
                rotateGridPlane(
                    diffStart.x, up, previousGridPlane.normal, previousGridPlane.rightVector, gridPlane.normal, gridPlane.rightVector, false
                );
            }
        }
    }
    else // The user wants translation of the grid plane.
    {
        if (!isConstrainedManipulationKeyDown)
        {
            translateGridPlane(diffPrev.x, right, previousGridPlane.position, gridPlane.position);
            translateGridPlane(-diffPrev.y, up, gridPlane.position, gridPlane.position);
            previousGridPlane = gridPlane;
        }
        else
        {
            if (std::abs(diffStart.y) > std::abs(diffStart.x)) // Translate plane only along the right vector.