pseffectobjtrail.h

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/*
 * Author: Andrew Robberts
 *
 * Copyright (C) 2003 Atomic Blue (info@planeshift.it, http://www.atomicblue.org)
 *
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation (version 2 of the License)
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

#ifndef PS_EFFECT_OBJ_TRAIL_HEADER
#define PS_EFFECT_OBJ_TRAIL_HEADER

#include "pseffectobj.h"
#include <imesh/genmesh.h>
#include <csgeom/spline.h>

class psEffect2DRenderer;

class psEffectObjTrail : public psEffectObj
{
public:
    struct MeshAnimControl : public scfImplementation1<MeshAnimControl, iGenMeshAnimationControl>
    {
    private:
        psEffectObjTrail* parent;

    public:
        // genmesh animation control
        bool AnimatesVertices() const
        {
            return true;
        }
        bool AnimatesTexels() const
        {
            return false;
        }
        bool AnimatesNormals() const
        {
            return false;
        }
        bool AnimatesColors()const
        {
            return true;
        }
        bool AnimatesBBoxRadius() const
        {
            return false;
        }

        MeshAnimControl(psEffectObjTrail* parent) : scfImplementationType(this)
        {
            this->parent = parent;
        }
        virtual ~MeshAnimControl()
        {
            parent = 0;
        }

        void Update(csTicks /*current*/, int /*num_verts*/, uint32 /*version_id*/)
        {
        }

        const csBox3 &UpdateBoundingBox(csTicks /*current*/, uint32 /*version_id*/, const csBox3 &bbox)
        {
            return bbox;
        }
        const float UpdateRadius(csTicks /*current*/, uint32 /*version_id*/, const float radius)
        {
            return radius;
        }
        const csBox3* UpdateBoundingBoxes(csTicks /*current*/, uint32 /*version_id*/)
        {
            return nullptr;
        }
        const csVector3* UpdateVertices(csTicks current, const csVector3* verts, int num_verts, uint32 version_id);
        const csVector2* UpdateTexels(csTicks /*current*/, const csVector2* texels,
                                      int /*num_texels*/, uint32 /*version_id*/)
        {
            return texels;
        }
        const csVector3* UpdateNormals(csTicks /*current*/, const csVector3* normals,
                                       int /*num_normals*/, uint32 /*version_id*/)
        {
            return normals;
        }
        const csColor4* UpdateColors(csTicks current, const csColor4* colors, int num_colors, uint32 version_id);
    };
    csRef<MeshAnimControl> meshControl;
    friend struct MeshAnimControl;

    psEffectObjTrail(iView* parentView, psEffect2DRenderer* renderer2d);
    ~psEffectObjTrail();

    // inheritted function overloads
    bool Load(iDocumentNode* node, iLoaderContext* ldr_context);
    bool Render(const csVector3 &up);
    bool Update(csTicks elapsed);
    psEffectObj* Clone() const;


private:

    bool PostSetup();

    csRef<iGeneralMeshState> genState;

    int segments;

    csVector3* vert;
    csColor4* colour;
    bool* missingUpdate;

    int currSegment;
    bool setMesh;

    float updateLen;
    float updateTotal;
    float updateLeft;

    csCatmullRomSpline* spline[2];

    float alpha;

    bool useMid;
};

#endif