/**
 * @file llavatarjoint.cpp
 * @brief Implementation of LLAvatarJoint class
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

//-----------------------------------------------------------------------------
// Header Files
//-----------------------------------------------------------------------------
#include "llavatarjoint.h"

#include "llgl.h"
#include "llrender.h"
#include "llmath.h"
#include "llglheaders.h"
#include "llavatarappearance.h"

const F32 DEFAULT_AVATAR_JOINT_LOD = 0.0f;

//-----------------------------------------------------------------------------
// Static Data
//-----------------------------------------------------------------------------
bool                    LLAvatarJoint::sDisableLOD = false;

//-----------------------------------------------------------------------------
// LLAvatarJoint()
// Class Constructors
//-----------------------------------------------------------------------------
LLAvatarJoint::LLAvatarJoint() :
    LLJoint()
{
    init();
}

LLAvatarJoint::LLAvatarJoint(S32 joint_num) :
    LLJoint(joint_num)
{
    init();
}

LLAvatarJoint::LLAvatarJoint(const std::string &name, LLJoint *parent) :
    LLJoint(name, parent)
{
    init();
}

void LLAvatarJoint::init()
{
    mValid = false;
    mComponents = SC_JOINT | SC_BONE | SC_AXES;
    mMinPixelArea = DEFAULT_AVATAR_JOINT_LOD;
    mPickName = PN_DEFAULT;
    mVisible = true;
    mMeshID = 0;
    mIsTransparent = false;
}


//-----------------------------------------------------------------------------
// ~LLAvatarJoint()
// Class Destructor
//-----------------------------------------------------------------------------
LLAvatarJoint::~LLAvatarJoint()
{
}


//--------------------------------------------------------------------
// setValid()
//--------------------------------------------------------------------
void LLAvatarJoint::setValid( bool valid, bool recursive )
{
    //----------------------------------------------------------------
    // set visibility for this joint
    //----------------------------------------------------------------
    mValid = valid;

    //----------------------------------------------------------------
    // set visibility for children
    //----------------------------------------------------------------
    if (recursive)
    {
        for (LLJoint* child : mChildren)
        {
            LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(child);
            joint->setValid(valid, true);
        }
    }

}

//--------------------------------------------------------------------
// setSkeletonComponents()
//--------------------------------------------------------------------
void LLAvatarJoint::setSkeletonComponents( U32 comp, bool recursive )
{
    mComponents = comp;
    if (recursive)
    {
        for (auto child : mChildren)
        {
            LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(child);
            joint->setSkeletonComponents(comp, recursive);
        }
    }
}

void LLAvatarJoint::setVisible(bool visible, bool recursive)
{
    mVisible = visible;

    if (recursive)
    {
        for (LLJoint* child : mChildren)
        {
            LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(child);
            joint->setVisible(visible, recursive);
        }
    }
}

void LLAvatarJoint::updateFaceSizes(U32 &num_vertices, U32& num_indices, F32 pixel_area)
{
    for (LLJoint* child : mChildren)
    {
        LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(child);
        joint->updateFaceSizes(num_vertices, num_indices, pixel_area);
    }
}

void LLAvatarJoint::updateFaceData(LLFace *face, F32 pixel_area, bool damp_wind, bool terse_update)
{
    for (LLJoint* child : mChildren)
    {
        LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(child);
        joint->updateFaceData(face, pixel_area, damp_wind, terse_update);
    }
}

void LLAvatarJoint::updateJointGeometry()
{
    for (LLJoint* child : mChildren)
    {
        LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(child);
        joint->updateJointGeometry();
    }
}


bool LLAvatarJoint::updateLOD(F32 pixel_area, bool activate)
{
    bool lod_changed = false;
    bool found_lod = false;

    for (LLJoint* child : mChildren)
    {
        LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(child);
        F32 jointLOD = joint->getLOD();

        if (found_lod || jointLOD == DEFAULT_AVATAR_JOINT_LOD)
        {
            // we've already found a joint to enable, so enable the rest as alternatives
            lod_changed |= joint->updateLOD(pixel_area, true);
        }
        else
        {
            if (pixel_area >= jointLOD || sDisableLOD)
            {
                lod_changed |= joint->updateLOD(pixel_area, true);
                found_lod = true;
            }
            else
            {
                lod_changed |= joint->updateLOD(pixel_area, false);
            }
        }
    }
    return lod_changed;
}

void LLAvatarJoint::dump()
{
    for (LLJoint* child : mChildren)
    {
        LLAvatarJoint* joint = static_cast<LLAvatarJoint*>(child);
        joint->dump();
    }
}


void LLAvatarJoint::setMeshesToChildren()
{
    removeAllChildren();
    for (LLAvatarJointMesh* mesh : mMeshParts)
    {
        addChild(mesh);
    }
}
//-----------------------------------------------------------------------------
// LLAvatarJointCollisionVolume()
//-----------------------------------------------------------------------------

LLAvatarJointCollisionVolume::LLAvatarJointCollisionVolume()
{
    mUpdateXform = false;
}

/*virtual*/
U32 LLAvatarJointCollisionVolume::render( F32 pixelArea, bool first_pass, bool is_dummy )
{
    LL_ERRS() << "Cannot call render() on LLAvatarJointCollisionVolume" << LL_ENDL;
    return 0;
}

LLVector3 LLAvatarJointCollisionVolume::getVolumePos(LLVector3 &offset)
{
    mUpdateXform = true;

    LLVector3 result = offset;
    result.scaleVec(getScale());
    result.rotVec(getWorldRotation());
    result += getWorldPosition();

    return result;
}

void LLAvatarJointCollisionVolume::renderCollision()
{
    updateWorldMatrix();

    gGL.pushMatrix();
    gGL.multMatrix( &mXform.getWorldMatrix().mMatrix[0][0] );

    gGL.diffuseColor3f( 0.f, 0.f, 1.f );

    gGL.begin(LLRender::LINES);

    LLVector3 v[] =
    {
        LLVector3(1,0,0),
        LLVector3(-1,0,0),
        LLVector3(0,1,0),
        LLVector3(0,-1,0),

        LLVector3(0,0,-1),
        LLVector3(0,0,1),
    };

    //sides
    gGL.vertex3fv(v[0].mV);
    gGL.vertex3fv(v[2].mV);

    gGL.vertex3fv(v[0].mV);
    gGL.vertex3fv(v[3].mV);

    gGL.vertex3fv(v[1].mV);
    gGL.vertex3fv(v[2].mV);

    gGL.vertex3fv(v[1].mV);
    gGL.vertex3fv(v[3].mV);


    //top
    gGL.vertex3fv(v[0].mV);
    gGL.vertex3fv(v[4].mV);

    gGL.vertex3fv(v[1].mV);
    gGL.vertex3fv(v[4].mV);

    gGL.vertex3fv(v[2].mV);
    gGL.vertex3fv(v[4].mV);

    gGL.vertex3fv(v[3].mV);
    gGL.vertex3fv(v[4].mV);


    //bottom
    gGL.vertex3fv(v[0].mV);
    gGL.vertex3fv(v[5].mV);

    gGL.vertex3fv(v[1].mV);
    gGL.vertex3fv(v[5].mV);

    gGL.vertex3fv(v[2].mV);
    gGL.vertex3fv(v[5].mV);

    gGL.vertex3fv(v[3].mV);
    gGL.vertex3fv(v[5].mV);

    gGL.end();

    gGL.popMatrix();
}


// End