愚者 WEEK11

Maya OBJ模型檔

• 網址:http://www.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/
• 下載 [source][data][win32][glut32.dll]
• 點開Data檔 用右鍵點擊一個OBJ檔用Notepade++打開
• v 頂點
• vn 法向量
• vt 貼圖
• f 面

 自己做出transformation出來

• 打開glut檔案
• 將剛剛在Notepade++打開的[transformation.c]程式碼複製到專案中
• 將[glm.c]更名為[glm.cpp]
• 將glm.cpp和glm.h拉到專案的目錄中
• 在codeblock中將glm.cpp加進去專案內
• 最後將data資料夾放入freeglut中的bin裡面

將模型放入程式中

• 將程式碼清空
• 打上下列程式碼

程式碼:

#include <GL/glut.h>

#include "glm.h" ///使用外掛

GLMmodel * model=NULL;  ///指標，只到GLM的資料結構

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    if(model==NULL) model =glmReadOBJ("data/Al.obj");  ///讀入模型

    glmUnitize(model);   ///怕模型太大太小,改成Unit單位大小-1..+1

    glmFacetNormals(model);  ///計算facet的法向量s

    glmVertexNormals(model, 90);  ///計算vertex的法向量s

    glmDraw(model, GLM_SMOOTH | GLM_MATERIAL);  ///畫

    glutSwapBuffers();

}

int main(int argc, char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE |GLUT_DEPTH);

    glutCreateWindow("week11親手打造");

    glutDisplayFunc(display);

    glutMainLoop();

}

打光
#include <GL/glut.h>
#include "glm.h"
GLMmodel * model=NULL;

const GLfloat light_ambient[] ={0.0f,0.0f,0.0f,1.0f};
const GLfloat light_diffuse[] ={1.0f,1.0f,1.0f,1.0f};
const GLfloat light_specular[] ={1.0f,1.0f,1.0f,1.0f};
const GLfloat light_position[] ={2.0f,5.0f,5.0f,0.0f};

const GLfloat mat_ambient[] ={0.7f,0.7f,0.7f,1.0f};
const GLfloat mat_diffuse[] ={0.8f,0.8f,0.8f,1.0f};
const GLfloat mat_specular[] ={1.0f,1.0f,1.0f,1.0f};
const GLfloat high_shininess[] ={100.0f};
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    if(model==NULL){
        model =glmReadOBJ("data/Al.obj");
        glmUnitize(model);
        glmFacetNormals(model);
        glmVertexNormals(model, 90);
        glmDraw(model, GLM_SMOOTH | GLM_MATERIAL);
    }
    glPushMatrix();
        glRotatef(180,0,1,0);
        glmDraw(model, GLM_SMOOTH | GLM_MATERIAL);
    glPopMatrix();


    glutSwapBuffers();
}
int main(int argc, char**argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE |GLUT_DEPTH);
    glutCreateWindow("week11親手打造");
    glutDisplayFunc(display);

    glEnable(GL_DEPTH_TEST);

    glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);

    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);

    glutMainLoop();

}