VERY BEAUTIFUL, VERY POWERFUL

一.

    一樣先安裝且設定好freeglut,OpecCV，開啟CodeBlocks建立新專案 week11_gundam，                 把MyGundam.zip下載解壓縮後的data資料夾放到freeglut/bin裡面

把week09_opencv的程式碼看能不能把剛彈的圖跑出來

能順利跑出來後，把剛彈的圖貼到茶壺上

///

#include <opencv/highgui.h>

#include <opencv/cv.h>

#include <GL/glut.h>

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);

    glutSolidTeapot( 0.3 );

    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();

}

///

二.

    接下來把模型給讀進來

1. 至Computer Graphics (jsyeh.org)下載 [source](會用到glm.h、glm.c、transformation.c)
2. 並將這三個檔案放進week11_gundam並將glm.c改成glm.cpp
3. 將glm.cpp加入CodeBlocks的week11_gundam中

///

#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();

}

///

寫完執行時發現貼圖上下顛倒，用小畫家把Diffuse.jpg垂直翻轉

幫剛彈加上3D跟旋轉

///

#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();

}

///

三.

    開啟一個新的glut專案，用茶壺模擬手臂的轉動

///

#include <GL/glut.h>

void hand(){

    glColor3f(0,1,0);

    glutSolidTeapot(0.2);

}

void body(){

    glColor3f(1,1,0);

    glutSolidTeapot(0.3);

}

float angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    body();

    glPushMatrix();

        glTranslated(0.5,0.2,0);

        glRotatef(angle,0,0,1);

        glTranslated(0.3,0,0);

        hand();

    glPopMatrix();

    glutSwapBuffers();

    angle+=0.3;

}

int main(int argc,char** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week11 TRT");

    glutIdleFunc(display);

    glutDisplayFunc(display);

    glutMainLoop();

}

///