OuO圖學筆記Week11

step01 下載myGundam.zip，data(file)放到工作目錄freeglut\bin\data

#include <opencv/highgui.h>

int main(){

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

    cvShowImage("week11",img);

    cvWaitKey();

}

如下圖:

step02-1 偷week09或是week10的程式

把鋼蛋變成茶壺材質

  把這行* myTexture("gwawa.jpg");*  改成  myTexture("data/Diffuse.jpg");

step2-2把 glm.c & glm.h & transformation.c 加到 week11_gundam ，

把glm.c改附檔名-->glm.cpp

step2-3.加程式碼 codeblocks / week11_gundam 按右鍵 add file 加glm.cpp

step2-4.寫程式碼

#include <opencv/highgui.h>

#include <opencv/cv.h>

#include <GL/glut.h>

#include "glm.h"///在專業目錄找

GLMmodel * pmodel = NULL ;///指標，指到模型，是空指標

int myTexture(char * filename)

{

    IplImage * img = cvLoadImage(filename);

    cvCvtColor(img,img, CV_BGR2RGB);

    glEnable(GL_TEXTURE_2D);

    GLuint id;

    glGenTextures(1, &id);

    glBindTexture(GL_TEXTURE_2D, id);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

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

    return id;

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    if( pmodel == NULL){

        pmodel=glmReadOBJ("data/Gundam.obj") ; ///讀模型

        glmUnitize(pmodel) ; ///換成Unit單位大小

        glmFacetNormals(pmodel) ; ///重新計算法向量

        glmVertexNormals(pmodel,90) ; ///重新計算模型頂點的法向量

    }

    glmDraw(pmodel,GLM_TEXTURE) ; ///模型畫貼圖

    glutSwapBuffers () ;

}

int main(int argc,char** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week11 gundam");

    glutDisplayFunc(display);

    myTexture("data/Diffuse.jpg");

    glutMainLoop();

}

step2-5圖片方向不對，用小畫家把Diffuse.jpg垂直翻轉

step2-6加3D，旋轉

#include <opencv/highgui.h>

#include <opencv/cv.h>

#include <GL/glut.h>

#include "glm.h"///在專業目錄找

GLMmodel * pmodel = NULL ;///指標，指到模型，是空指標

int myTexture(char * filename)

{

    IplImage * img = cvLoadImage(filename);

    cvCvtColor(img,img, CV_BGR2RGB);

    glEnable(GL_TEXTURE_2D);

    GLuint id;

    glGenTextures(1, &id);

    glBindTexture(GL_TEXTURE_2D, id);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

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

    return id;

}

float angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    if( pmodel == NULL){

        pmodel=glmReadOBJ("data/Gundam.obj");///讀模型

        glmUnitize(pmodel);///換成Unit單位大小

        glmFacetNormals(pmodel);///重新計算模型面的法向量

        glmVertexNormals(pmodel,90);///重新計算模型頂點的法向量

    }

    glPushMatrix();

        glRotatef(angle,0,1,0);

        glmDraw(pmodel,GLM_TEXTURE);///模型畫貼圖

    glPopMatrix();

    glutSwapBuffers();

    angle+=0.8;

}

int main(int argc,char** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week11 gundam");

    glutIdleFunc(display);

    glutDisplayFunc(display);

    myTexture("data/Diffuse.jpg");

    glEnable(GL_DEPTH_TEST);

    glutMainLoop();

}