Method update

Source/RenderPasses/SDFEditor/SelectionWheel.cpp:32–129

using namespace Falcor;

void Falcor::SelectionWheel::update(const float2& mousePos, const Desc& description)
{
    const float kPI = (float)M_PI;
    const float kPI2 = kPI * 2.f;
    const float kStartOffest = kPI / 2.f;
    mDescription = description;

    const uint32_t groupCount = (uint32_t)mDescription.sectorGroups.size();
    float minSectorAngle = FLT_MAX;
    for (uint32_t groupIndex = 0; groupIndex < groupCount; groupIndex++)
    {
        float sectorAngle = getAngleOfSectorInGroup(groupIndex);
        minSectorAngle = std::fminf(sectorAngle, minSectorAngle);
    }

    const float groupAngle = getGroupAngle();
    float halfGroupSpacingAngle = minSectorAngle * 0.05f;

    uint32_t excludeGroup = UINT32_MAX;

    float dirLength;
    float mouseAngle;
    computeMouseAngleAndDirLength(mousePos, mouseAngle, dirLength);

    float4 borderColor = mDescription.lineColor;
    borderColor.w = mDescription.borderWidth;

    // Check if mouse is hovering over the selection wheel
    if (dirLength >= mDescription.minRadius && dirLength <= mDescription.maxRadius)
    {
        // Highlight the sector that the mouse is over.
        uint32_t groupIndex, sectorIndex;
        computeGroupAndSectorIndexFromAngle(mouseAngle, groupIndex, sectorIndex);
        excludeGroup = groupIndex;

        float rotation = getRotationOfSector(groupIndex, sectorIndex);
        float sectorAngle = getAngleOfSectorInGroup(groupIndex);

        const uint32_t kSectorCount = mDescription.sectorGroups[groupIndex];
        uint32_t lastSectorIndex = kSectorCount - 1;
        // If the selected sector is on the sides, render two circle sectors, one for the selected and one for the others.
        if (sectorIndex == 0 || sectorIndex == lastSectorIndex)
        {
            // The other sectors.
            float groupSpacing = sectorIndex == 0 ? halfGroupSpacingAngle : -halfGroupSpacingAngle;
            float offset = sectorIndex == 0 ? sectorAngle : 0.0f;
            addCircleSector(
                groupAngle * groupIndex + offset,
                groupAngle - sectorAngle,
                mDescription.baseColor,
                borderColor,
                -groupSpacing,
                false,
                sectorIndex == 0 ? ExcludeBorderFlags::Left : ExcludeBorderFlags::Right
            );

            // Highlighted sector.
            addCircleSector(rotation, sectorAngle, mDescription.highlightColor, borderColor, groupSpacing);