不甘心拉

1作業:Q&A
2複習:貼圖
3複習:打光
4複習:模型

複習貼圖
下載opencv2.1 freeglut
opencv要弄很多東西

#include <opencv/highgui.h> ///for cvCvtColor()

#include <opencv/cv.h>

#include <GL/glut.h> ///3D glut

#include <stdio.h>

float angle=0; ///自動轉很帥

GLUquadric * quad;

void display()

{   glEnable(GL_DEPTH_TEST); ///要啟動 Detph Test 深度值的測試,3D顯示才正確

    glClear(GL_COLOR_BUFFER_BIT  | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();///自動轉很帥

        glRotatef(90, 1,0,0);

        glRotatef(angle, 0,0,1);///自動轉很帥

        gluQuadricTexture(quad, 1);

        gluSphere(quad, 0.5, 30, 30);///glutSolidTeapot(0.3);

    glPopMatrix();///自動轉很帥

    glFlush();

    angle+=1;///自動轉很帥

}

void myInit()

{

    quad = gluNewQuadric();

    IplImage * img = cvLoadImage("maruto.jpg"); ///OpenCV讀圖

    cvCvtColor(img,img, CV_BGR2RGB); ///OpenCV轉色彩 (需要cv.h)

    glEnable(GL_TEXTURE_2D); ///1. 開啟貼圖功能

    GLuint id; ///準備一個 unsigned int 整數, 叫 貼圖ID

    glGenTextures(1, &id); /// 產生Generate 貼圖ID

    glBindTexture(GL_TEXTURE_2D, id); ///綁定bind 貼圖ID

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); /// 貼圖參數, 超過包裝的範圖T, 就重覆貼圖

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); /// 貼圖參數, 超過包裝的範圖S, 就重覆貼圖

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); /// 貼圖參數, 放大時的內插, 用最近點

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); /// 貼圖參數, 縮小時的內插, 用最近點

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData);

}   ///最後一行最難/最重要, 所貼圖影像的資料都設定好

void timer(int t)

{/// 1000 msec   50fps:20msec

    glutTimerFunc(20, timer, 0);

    //printf("timer now\n");

    glutPostRedisplay();

}

int main(int argc, char**argv)

{   glutInit(&argc, argv);

    glutCreateWindow("3D");

    glutDisplayFunc(display); ///顯示

    //glutIdleFunc(display);///自動轉很帥 (閒閒沒事幹, 就重畫)

    glutTimerFunc(0, timer, 0);

    myInit(); ///我的 init 初始化 把貼圖準備好 前面OpenCV 2行, 後面 OpenGL 9行

    glutMainLoop();

}

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這是改過的 放了三張圖片 一個茶壺 一個旋轉 一個背景

#include <GL/glut.h>

#include <opencv/highgui.h> ///OpenCV High GUI讀圖 ///貼圖需要它

#include <opencv/cv.h> ///OpenCV cvCvtColor() to convert color///貼圖需要它

///程式碼是對的, 但是沒有設定好include, lib, bin

GLuint id1, id2, id3;///NOW2 ///貼圖需要它

float a=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glBindTexture(GL_TEXTURE_2D, id1);///id1 for background ///貼圖需要它

    glBegin(GL_POLYGON); ///貼圖需要它

        glTexCoord2f(0, 0); glVertex3f(-1, +1, 0); ///貼圖需要它

        glTexCoord2f(0, 1); glVertex3f(-1, -1, 0); ///貼圖需要它

        glTexCoord2f(1, 1); glVertex3f(+1, -1, 0); ///貼圖需要它

        glTexCoord2f(1, 0); glVertex3f(+1, +1, 0); ///貼圖需要它

    glEnd();///貼圖需要它

    glBindTexture(GL_TEXTURE_2D, id3);///id3 for rotating square

    glPushMatrix();

        glTranslatef(0.5, 0.5, 0);

        glRotatef(a++, 0, 0, 1);

        glScalef(0.3, 0.3, 0.3);

        glBegin(GL_POLYGON);

            glTexCoord2f(0, 0); glVertex3f(-1, +1, 0);

            glTexCoord2f(0, 1); glVertex3f(-1, -1, 0);

            glTexCoord2f(1, 1); glVertex3f(+1, -1, 0);

            glTexCoord2f(1, 0); glVertex3f(+1, +1, 0);

        glEnd();

    glPopMatrix();

    glBindTexture(GL_TEXTURE_2D, id2);///id2 for teapot

    glutSolidTeapot( 0.3 );

    glutSwapBuffers();

}

///void myInit()

GLuint myTexture(char * filename) ///貼圖需要它

{

    IplImage * img = cvLoadImage(filename); ///NOW OpenCV ///貼圖需要它

    cvCvtColor(img, img, CV_BGR2RGB);///convert color ///NOW OpenCV ///貼圖需要它

    GLuint id; ///貼圖需要它

    glEnable(GL_TEXTURE_2D); ///貼圖需要它

    glGenTextures(1, &id ); ///貼圖需要它

    glBindTexture(GL_TEXTURE_2D, id); ///貼圖需要它

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); ///貼圖需要它

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); ///貼圖需要它

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); ///貼圖需要它

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); ///貼圖需要它

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, img->width, img->height, 0, GL_RGB, GL_UNSIGNED_BYTE, img->imageData); ///貼圖需要它

    return id;///貼圖需要它

}

int main(int argc, char **argv)

{

    ///IplImage * img = cvLoadImage("marvel.jpg");

    ///cvShowImage("opencv", img);

    ///cvWaitKey(0);///等你按按鍵

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE |GLUT_DEPTH);

    glutCreateWindow("GLUT");///之後

    ///建好GLUT視窗,可以開始準備 3D 貼圖 (要在create...MainLoop才能建貼圖)

    id1 = myTexture("naruto.jpg"); ///myInit();///我們的貼圖在這裡 ///貼圖需要它

    id2 = myTexture("maruto.jpg");

    id3 = myTexture("nn.jpg");

    glutDisplayFunc(display);

    glutIdleFunc(display);

    glutMainLoop();///之前

}