blockinginforenderer.cpp

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/***************************************************************************
 *   Copyright (C) 2005-2019 by the FIFE team                              *
 *   http://www.fifengine.net                                              *
 *   This file is part of FIFE.                                            *
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 *   FIFE 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; either          *
 *   version 2.1 of the License, or (at your option) any later version.    *
 *                                                                         *
 *   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.                       *
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 *   You should have received a copy of the GNU Lesser General Public      *
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 *   Free Software Foundation, Inc.,                                       *
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// Standard C++ library includes

// 3rd party library includes

// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "video/renderbackend.h"
#include "util/math/fife_math.h"
#include "util/log/logger.h"
#include "model/metamodel/grids/cellgrid.h"
#include "model/structures/instance.h"
#include "model/structures/layer.h"
#include "model/structures/location.h"
#include "model/structures/cell.h"
#include "model/structures/cellcache.h"

#include "view/camera.h"
#include "blockinginforenderer.h"


namespace FIFE {
    static Logger _log(LM_VIEWVIEW);

    BlockingInfoRenderer::BlockingInfoRenderer(RenderBackend* renderbackend, int32_t position):
        RendererBase(renderbackend, position) {
        setEnabled(false);
        m_color.r = 0;
        m_color.g = 255;
        m_color.b = 0;
    }

    BlockingInfoRenderer::BlockingInfoRenderer(const BlockingInfoRenderer& old):
        RendererBase(old),
        m_color(old.m_color) {
        setEnabled(false);
    }

    RendererBase* BlockingInfoRenderer::clone() {
        return new BlockingInfoRenderer(*this);
    }

    BlockingInfoRenderer::~BlockingInfoRenderer() {
    }

    BlockingInfoRenderer* BlockingInfoRenderer::getInstance(IRendererContainer* cnt) {
        return dynamic_cast<BlockingInfoRenderer*>(cnt->getRenderer("BlockingInfoRenderer"));
    }

    void BlockingInfoRenderer::render(Camera* cam, Layer* layer, RenderList& instances) {
        CellGrid* cg = layer->getCellGrid();
        if (!cg) {
            FL_WARN(_log, "No cellgrid assigned to layer, cannot draw grid");
            return;
        }

        Rect cv = cam->getViewPort();
        CellCache* cache = layer->getCellCache();
        if (cache) {
            const std::vector<std::vector<Cell*> >& cells = cache->getCells();
            std::vector<std::vector<Cell*> >::const_iterator it = cells.begin();
            for (; it != cells.end(); ++it) {
                std::vector<Cell*>::const_iterator cit = (*it).begin();
                for (; cit != (*it).end(); ++cit) {
                    ExactModelCoordinate emc = FIFE::intPt2doublePt((*cit)->getLayerCoordinates());
                    ScreenPoint sp = cam->toScreenCoordinates(cg->toMapCoordinates(emc));
                    // if it is not in cameras view continue
                    if (sp.x < cv.x || sp.x > cv.x + cv.w ||
                        sp.y < cv.y || sp.y > cv.y + cv.h) {
                        continue;
                    }
                    if ((*cit)->getCellType() != CTYPE_NO_BLOCKER) {
                        std::vector<ExactModelCoordinate> vertices;
                        cg->getVertices(vertices, (*cit)->getLayerCoordinates());
                        std::vector<ExactModelCoordinate>::const_iterator it = vertices.begin();
                        int32_t halfind = vertices.size() / 2;
                        ScreenPoint firstpt = cam->toScreenCoordinates(cg->toMapCoordinates(*it));
                        Point pt1(firstpt.x, firstpt.y);
                        Point pt2;
                        ++it;
                        for (; it != vertices.end(); it++) {
                            ScreenPoint pts = cam->toScreenCoordinates(cg->toMapCoordinates(*it));
                            pt2.x = pts.x;
                            pt2.y = pts.y;
                            m_renderbackend->drawLine(pt1, pt2, m_color.r, m_color.g, m_color.b);
                            pt1 = pt2;
                        }
                        m_renderbackend->drawLine(pt2, Point(firstpt.x, firstpt.y), m_color.r, m_color.g, m_color.b);
                        ScreenPoint spt1 = cam->toScreenCoordinates(cg->toMapCoordinates(vertices[0]));
                        Point pt3(spt1.x, spt1.y);
                        ScreenPoint spt2 = cam->toScreenCoordinates(cg->toMapCoordinates(vertices[halfind]));
                        Point pt4(spt2.x, spt2.y);
                        m_renderbackend->drawLine(pt3, pt4, m_color.r, m_color.g, m_color.b);
                    }
                }
            }
        } else {
            RenderList::const_iterator instance_it = instances.begin();
            for (;instance_it != instances.end(); ++instance_it) {
                Instance* instance = (*instance_it)->instance;
                if (!instance->getObject()->isBlocking() || !instance->isBlocking()) {
                    continue;
                }
                std::vector<ExactModelCoordinate> vertices;
                cg->getVertices(vertices, instance->getLocationRef().getLayerCoordinates());
                std::vector<ExactModelCoordinate>::const_iterator it = vertices.begin();
                int32_t halfind = vertices.size() / 2;
                ScreenPoint firstpt = cam->toScreenCoordinates(cg->toMapCoordinates(*it));
                Point pt1(firstpt.x, firstpt.y);
                Point pt2;
                ++it;
                for (; it != vertices.end(); it++) {
                    ScreenPoint pts = cam->toScreenCoordinates(cg->toMapCoordinates(*it));
                    pt2.x = pts.x;
                    pt2.y = pts.y;
                    m_renderbackend->drawLine(pt1, pt2, m_color.r, m_color.g, m_color.b);
                    pt1 = pt2;
                }
                m_renderbackend->drawLine(pt2, Point(firstpt.x, firstpt.y), m_color.r, m_color.g, m_color.b);
                ScreenPoint spt1 = cam->toScreenCoordinates(cg->toMapCoordinates(vertices[0]));
                Point pt3(spt1.x, spt1.y);
                ScreenPoint spt2 = cam->toScreenCoordinates(cg->toMapCoordinates(vertices[halfind]));
                Point pt4(spt2.x, spt2.y);
                m_renderbackend->drawLine(pt3, pt4, m_color.r, m_color.g, m_color.b);
            }
        }
    }

    void BlockingInfoRenderer::setColor(uint8_t r, uint8_t g, uint8_t b) {
        m_color.r = r;
        m_color.g = g;
        m_color.b = b;
    }
}