draw_pointset_example.cpp

// Description: Draw point-set example

#include "pastel_example.h"

#include "pastel/gfx/drawing.h"
#include "pastel/gfx/color_space.h"
#include "pastel/gfx/pcx.h"
#include "pastel/gfx/image_gfxrenderer.h"

#include <fstream>
#include <iostream>
#include <list>

using namespace Pastel;

namespace
{

    class Test
        : public TestSuite
    {
    public:
        Test()
            : TestSuite(&testReport())
        {
        }

        virtual void run()
        {
            test();
        }

        void test()
        {
            std::vector<Vector3> pointSet;

            std::ifstream file("pointset.txt");

            Vector3 minBound(infinity<real>());
            Vector3 maxBound(-infinity<real>());
            while(true)
            {
                Vector3 p;
                file >> p[0];
                file >> p[1];
                file >> p[2];
                if (!file)
                {
                    break;
                }

                minBound = min(p, minBound);
                maxBound = max(p, maxBound);

                pointSet.push_back(p);
            }

            real ratio = (maxBound[1] - minBound[1]) / (maxBound[0] - minBound[0]);

            integer width = 2048;
            integer height = width * ratio;

            Array<Color> image(Vector2i(width, height), Color(1));

            Image_GfxRenderer<Color> renderer;
            renderer.setImage(&image);
            renderer.setViewWindow(AlignedBox2(shrink(minBound), shrink(maxBound)));

            for (integer i = 0;i < pointSet.size();++i)
            {
                Vector2 p = shrink(pointSet[i]);
                real z = pointSet[i][2];

                real hue = (z - minBound[2]) / (maxBound[2] - minBound[2]) * 0.75;
                renderer.setColor(hsvToRgb(Color(hue, 1, 1)));
                renderer.drawPoint(p);
            }

            savePcx(image, "pointset.pcx");
        }
    };

    void test()
    {
        Test theTest;
        theTest.run();
    }

    void addTest()
    {
        testRunner().add("DrawPointset", test);
    }

    CallFunction run(addTest);

}