Function xCutscene_SetCamera

src/SB/Core/x/xCutscene.cpp:295–356

TODO: general pointer/index mismatching in here instructions and control flow should be close match though

// TODO: general pointer/index mismatching in here
//       instructions and control flow should be close match though
void xCutscene_SetCamera(xCutscene* csn, xCamera* cam)
{
    xCutsceneData* data = (xCutsceneData*)&csn->Play[1];
    for (U32 i = 0; i < csn->Play->NumData; i++)
    {
        if (data[i].DataType == XCUTSCENEDATA_TYPE_CAMERA)
        {
            U32 dataIndex = data[i + 1].DataType;
            S32 frame = std::floorf(30.0f * csn->CamTime);
            zFlyKey* keys = (zFlyKey*)((char*)&data[i] + 0x14);

            F32 lerp;
            if (keys[i + 1].frame < frame)
            {
                lerp = 0.0f;
            }
            else if (keys[i].frame >= frame)
            {
                lerp = 1.0f;
                keys += keys[i].frame - 2;
            }
            else
            {
                lerp = 30.0f * csn->CamTime - std::floorf(30.0f * csn->CamTime);
                keys += keys[i].frame - frame;
            }

            F32 invlerp = 1.0f - lerp;

            xMat4x3 camMat;
            xMat3x3 tmpMat;
            xQuat quats[2];
            for (U32 j = 0; j < 2; j++)
            {
                tmpMat.right.x = -keys[j].matrix[0];
                tmpMat.right.y = -keys[j].matrix[1];
                tmpMat.right.z = -keys[j].matrix[2];
                tmpMat.up.x = keys[j].matrix[3];
                tmpMat.up.y = keys[j].matrix[4];
                tmpMat.up.z = keys[j].matrix[5];
                tmpMat.at.x = -keys[j].matrix[6];
                tmpMat.at.y = -keys[j].matrix[7];
                tmpMat.at.z = -keys[j].matrix[8];
                xQuatFromMat(&quats[j], &tmpMat);
            }

            xQuat qresult;
            xQuatSlerp(&qresult, &quats[0], &quats[1], lerp);
            xQuatToMat(&qresult, &camMat);
            xVec3Lerp(&camMat.pos, (xVec3*)&keys[0].matrix[9], (xVec3*)&keys[1].matrix[9], lerp);

            U32 count;

            F32 camFOV = 114.59155f *
                         std::atan((12.7f * (keys[0].aperture[0] * lerp + keys[1].aperture[0] * invlerp)) /
                                   (keys[0].focal * lerp + keys[1].focal * invlerp));
            cam->mat = camMat;
            gCameraLastFov = 0.0f;