objviewer/src/viewer/viewer.cc

#include <stdio.h>
#include <glew.h>
#include "../common/base.h"
#include "../common/CELLMath.hpp"
#include "../common/GlewOpenGL.h"
#include "tiny_obj_loader.h"

using namespace std;
using namespace CELL;

class Viewer : public GlewOpenGL {
public:

    struct Vertex {
        float x, y, z;
        float u, v;
    };

    Viewer(int width, int height, const string& title) : GlewOpenGL(width, height, title) {

    }

    void init() {
        _texture = createTexture("/home/blobt/Documents/dev/cpp/opengl2/models/chair/cloth.jpg");
    }

    void render() {
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        gluPerspective(100, double(_width) / double(_height), 0.1, 1000);

        Vertex vertex[] = {
            {-1, -1.5, 0, 0, 0},
            {1, -1.5, 0, 1, 0},
            {1, 1.5, 0, 1, 1},
            {-1, 1.5, 0, 0, 1},
        };

        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
        glTranslatef(0, 0, -2);


        //开始深度测试，后面绘制的面就不会遮挡前面绘制的面
        glEnable(GL_DEPTH_TEST);

        //设置顶点
        glEnableClientState(GL_VERTEX_ARRAY);
        glVertexPointer(3, GL_FLOAT, sizeof (Vertex), &vertex[0].x);

        //设置贴图
        glBindTexture(GL_TEXTURE_2D, _texture);
        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
        glTexCoordPointer(2, GL_FLOAT, sizeof (Vertex), &vertex[0].u);

        glDrawArrays(GL_QUADS, 0, 4);
    }

    ~Viewer() {

    }

private:
    GLuint _texture;
};

int main(int argc, char** argv) {

    if (argc < 2) {

    }

    Viewer viewer(1024, 768, "Viewer");
    viewer.loop();

    return 0;
}