Method UpdateDecals

BindlessDeferred/BindlessDeferred.cpp:1066–1189

}

void BindlessDeferred::UpdateDecals(const Timer& timer)
{
    if(AppSettings::ClearDecals.Pressed())
        numDecals = 0;

    // Update picking and placing new decals
    cursorDecal = Decal();
    cursorDecal.Type = uint32(-1);
    cursorDecalIntensity = 0.0f;
    if(currMouseState.IsOverWindow && AppSettings::EnableDecalPicker)
    {
        // Update the decal cursor
        const uint64 texIdx = currDecalType * AppSettings::NumTexturesPerDecal;
        Assert_(texIdx < ArraySize_(decalTextures));

        Float2 textureSize;
        textureSize.x = float(decalTextures[texIdx].Width);
        textureSize.y = float(decalTextures[texIdx].Height);
        const float sizeScale = 1 / 1024.0f;

        const PickingData* pickingData = pickingReadbackBuffers[DX12::CurrFrameIdx].Map<PickingData>();
        if(pickingData->Normal != Float3(0.0f, 0.0f, 0.0f))
        {
            const float decalThickness = 0.125f;

            cursorDecal.Position = pickingData->Position;
            cursorDecal.Size = Float3(textureSize.x * sizeScale, textureSize.y * sizeScale, decalThickness);
            cursorDecal.Type = uint32(currDecalType);
            cursorDecalIntensity = float(std::cos(timer.ElapsedSecondsD() * Pi2)) * 0.25f + 0.5f;

            Float3 forward = -pickingData->Normal;
            Float3 up = std::abs(Float3::Dot(forward, Float3(0.0f, 1.0f, 0.0f))) < 0.99f ? Float3(0.0f, 1.0f, 0.0f) : Float3(0.0f, 0.0f, 1.0f);
            Float3 right = Float3::Normalize(Float3::Cross(up, forward));
            up = Float3::Cross(forward, right);
            Float3x3 orientation = Float3x3(right, up, forward);

            cursorDecal.Orientation = Quaternion(orientation);

            if(currMouseState.MButton.RisingEdge)
            {
                // Place a new decal, and fill the buffer
                const uint64 decalIdx = (numDecals++) % AppSettings::MaxDecals;
                decals[decalIdx] = cursorDecal;

                currDecalType = (currDecalType + 1) % uint64(AppSettings::NumDecalTypes);
            }
        }

        pickingReadbackBuffers[DX12::CurrFrameIdx].Unmap();
    }

    // Update the Z bounds, and fill the buffers
    const Float4x4 viewMatrix = camera.ViewMatrix();
    const float nearClip = camera.NearClip();
    const float farClip = camera.FarClip();
    const float zRange = farClip - nearClip;
    const Float3 cameraPos = camera.Position();
    const float3 boxVerts[8] = { float3(-1,  1, -1), float3(1,  1, -1), float3(-1,  1, 1), float3(1,  1, 1),