Function CompAnimUpdate

engine/gameobject/src/gameobject/comp_anim.cpp:165–394

    }

    UpdateResult CompAnimUpdate(const ComponentsUpdateParams& params, ComponentsUpdateResult& update_result)
    {
        DM_PROFILE("Update");

        /*
         * The update is divided into three passes.
         *
         * The first pass updates the delay and starts animations. Newly started
         * animations should automatically cancel others of the same property,
         * which is why this is done in a separate pass. Otherwise an ongoing
         * animation could have already animated the property and it would then
         * have an incorrect value when read by the newly started animation to
         * retrieve the from-value.
         *
         * The second pass advances and evaluates the animations.
         *
         * The third pass prunes stopped animations and call callbacks.
         *
         * The reason for this is to give consistent animation evaluation, independent of ordering.
         */
        UpdateResult result = UPDATE_RESULT_OK;
        AnimWorld* world = (AnimWorld*)params.m_World;
        world->m_InUpdate = 1;
        uint32_t size = world->m_Animations.Size();
        bool transforms_updated = false;

        DM_PROPERTY_ADD_U32(rmtp_ComponentsAnim, size);

        uint32_t i = 0;
        for (i = 0; i < size; ++i)
        {
            Animation& anim = world->m_Animations[i];
            if (!anim.m_Playing)
                continue;
            float dt = params.m_UpdateContext->m_DT;
            // Check delay
            if (anim.m_Delay > dt)
            {
                continue;
            }
            if (anim.m_FirstUpdate)
            {
                anim.m_FirstUpdate = 0;
                // Update from-value
                if (!anim.m_Composite)
                {
                    if (anim.m_Value != 0x0)
                        anim.m_From = *anim.m_Value;
                    else
                    {
                        PropertyDesc desc;
                        PropertyOptions property_opt;
                        AddPropertyOptionsIndex(&property_opt, 0);

                        GetProperty(anim.m_Instance, anim.m_ComponentId, anim.m_PropertyId, property_opt, desc);
                        anim.m_From = (float)desc.m_Variant.m_Number;
                    }
                }