week08

 ##期末考模擬練習

##下載課本範例

source data win32

分析一下 data.zip裡的檔案 解壓縮

-Al.mtl 看到裡面Ka Kd 對應打光的material 

-Al.obj 裡面很多內容

- #代表註解

- 可以再引用另一個mtl 檔

-V代表頂點 後面有座標 X Y Z

-F代表face 或facet 後面有頂點的編號

-G 代表group 

三段程式碼

#include "glm.h"

GLMmodel * pmodel = NULL;

void drawmodel(void)

{

    if (!pmodel) {

pmodel = glmReadOBJ("data/porsche.obj");

if (!pmodel) exit(0);

glmUnitize(pmodel);

glmFacetNormals(pmodel);

glmVertexNormals(pmodel, 90.0);

    }

    glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL);

}

步驟week08-1

鋼蛋

#include <GL/glut.h>

#include "glm.h"

GLMmodel * pmodel = NULL;

void drawmodel(void)

{

    if (!pmodel) {

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

if (!pmodel) exit(0);

glmUnitize(pmodel);

glmFacetNormals(pmodel);

glmVertexNormals(pmodel, 90.0);

    }

    glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL);

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    drawmodel();//glutSolidTeapot(0.3);

    glutSwapBuffers();

}

int main(int argc, char *argv[])///138¦æ

{

  glutInit(&argc, argv);///140¦æ

  glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);///143¦æ

  glutCreateWindow("week08 gundam");///145¦æ

  glutDisplayFunc(display);///148¦æ

  glutMainLoop();///174¦æ

}

彩色版鋼蛋

旋轉板鋼蛋

#include <opencv/highgui.h> ///使用 OpenCV 2.1 比較簡單, 只要用 High GUI 即可

#include <opencv/cv.h>

#include <GL/glut.h>

int myTexture(char * filename)

{

    IplImage * img = cvLoadImage(filename); ///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);

    return id;

}

#include <GL/glut.h>

#include "glm.h"

GLMmodel * pmodel = NULL;

void drawmodel(void)

{

    if (!pmodel) {

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

if (!pmodel) exit(0);

glmUnitize(pmodel);

glmFacetNormals(pmodel);

glmVertexNormals(pmodel, 90.0);

    }

    glmDraw(pmodel, GLM_SMOOTH | GLM_TEXTURE);

}

float angle = 0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix(); ///加這行, 讓它轉動

        glRotatef(angle++, 0, 1, 0); ///加這行, 讓它轉動

        drawmodel(); //glutSolidTeapot( 0.3 );

    glPopMatrix(); ///加這行, 讓它轉動

    glutSwapBuffers();

}

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 };///加這行, 讓它轉動

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 };

int main(int argc, char *argv[])///138¦æ

{

  glutInit(&argc, argv);///140¦æ

  glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);///143¦æ

  glutCreateWindow("week08 gundam");///145¦æ

  glutDisplayFunc(display);///148¦æ

  glutIdleFunc(display);

  myTexture("data/Diffuse.jpg");

  glEnable(GL_DEPTH_TEST);

  glDepthFunc(GL_LESS);

  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();///174¦æ

}