GLWTankModel.cpp

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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; either version 2 of the License, or
//    (at your option) any later version.
//
//    Scorched3D 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 Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#include <GLW/GLWTankModel.h>
#include <client/ScorchedClient.h>
#include <graph/MainCamera.h>
#include <graph/ModelRendererMesh.h>
#include <client/ClientState.h>
#include <tankgraph/TargetRendererImplTank.h>
#include <tank/TankContainer.h>
#include <tank/TankPosition.h>
#include <common/Vector4.h>
#include <landscape/Landscape.h>
#include <sky/Sky.h>
#include <GLW/GLWTranslate.h>

REGISTER_CLASS_SOURCE(GLWTankModel);

GLWTankModel::GLWTankModel(float x, float y, float w, float h) :
        GLWidget(x, y, w, h), 
        totalTime_(0.0f)
{
}

GLWTankModel::~GLWTankModel()
{
}

void GLWTankModel::draw()
{
        Tank *current = 
                ScorchedClient::instance()->getTankContainer().getCurrentTank();
        if (!current) return;

        TargetRendererImplTank *renderer = (TargetRendererImplTank *) 
                current->getRenderer();
        if (!renderer) return;

        Vector4 sunPosition(-100.0f, 100.0f, 400.0f, 1.0f);
        Vector4 sunDiffuse(0.9f, 0.9f, 0.9f, 1.0f);
        Vector4 sunAmbient(0.4f, 0.4f, 0.4f, 1.0f);
        glLightfv(GL_LIGHT1, GL_AMBIENT, sunAmbient);
        glLightfv(GL_LIGHT1, GL_DIFFUSE, sunDiffuse);

        // Add the tooltip for the model name+attributes
        GLWToolTip::instance()->addToolTip(&renderer->getTips()->tankTip, 
                GLWTranslate::getPosX() + x_ + 20.0f, 
                GLWTranslate::getPosY() + y_ + 20.0f, 80.0f, 80.0f);

        // Find the angles to rotate so the tank is at the
        // same angle as the "real" tank on the landscape
        Vector &lookFrom = MainCamera::instance()->getCamera().getCurrentPos();
        Vector &lookAt = MainCamera::instance()->getCamera().getLookAt();
        Vector dir = (lookAt - lookFrom).Normalize();
        float angXY = atan2f(dir[0], dir[1]) / 3.14f * 180.0f;
        float angYZ = acosf(dir[2]) / 3.14f * 180.0f + 180.0f;
        if (angYZ < 280.0f) angYZ = 280.0f;

        // Draw the tank
        glPushMatrix();
                // Set the tank angle
                glTranslatef(x_ + w_ / 2.0f, y_ + w_ / 2.0f, 0.0f);

                glLightfv(GL_LIGHT1, GL_POSITION, sunPosition);

                glRotatef(angYZ, 1.0f, 0.0f, 0.0f);
                glRotatef(angXY, 0.0f, 0.0f, 1.0f);

                // Draw the tank model
                glScalef(w_ / 4.0f, w_ / 4.0f, w_ / 4.0f);
                GLState tankState(GLState::TEXTURE_OFF | GLState::DEPTH_ON); // For no tank skins
                Vector position;
                TankMesh *mesh = renderer->getMesh();
                if (mesh)
                {
                        Vector4 rotation(1.0f, 0.0f, 0.0f, 0.0f);
                        float matrix[16];
                        rotation.getOpenGLRotationMatrix(matrix);

                        mesh->draw(
                                totalTime_ * 20.0f,
                                false, matrix, position, 0.0f,
                                current->getPosition().getRotationGunXY().asFloat(),
                                current->getPosition().getRotationGunYZ().asFloat(),
                                true);
                }
        glPopMatrix();

        Landscape::instance()->getSky().getSun().setLightPosition(); // Reset light
}

void GLWTankModel::mouseDown(int button, float x, float y, bool &skipRest)
{
        if (inBox(x, y, x_, y_, w_, h_))
        {
                skipRest = true;
                MainCamera::instance()->getTarget().setCameraType(TargetCamera::CamBehind);
        }
}

void GLWTankModel::simulate(float frameTime)
{
        totalTime_ += frameTime;
}

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