week06_馬丁

（１）主題：打光 Part1
（２）主題：模型 OBJ檔
（３）實作：GLM vs OBJ
（４）回家作業

［１］進入 ://httpwww.cmlab.csie.ntu.edu.tw/~jsyeh/3dcg10/ 下載這四個檔案，將 data 跟      glut32.dll 放入windows資料夾裡面

［２］開啟 Light Material.exe，GLfloat light 打光的顏色，GLfolat material 是物體本身的材質

［３］到 https://www.transmissionzero.co.uk/software/freeglut-devel/ 下載 Download freeglut 3.0.0 for MinGW 

［４］開啟 CodeBlocks 的 GLUT，白底立體茶壺，有打光，所以有影子，看起來較立體，程式碼如下

#include <GL/glut.h>

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()

{

     glColor3f(1.00 ,1.00 ,0);

     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("我是高御舜的week06");

     glutDisplayFunc(display);

     glClearColor(1,1,1,1);

    glEnable(GL_CULL_FACE);

    glCullFace(GL_BACK);

    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();

}

［５］解壓縮 source.zip 將裡面的 glm.c  和 glm.h 跟 transformation.c 三個檔案放到 week06_glut 資料夾裡面，複製 transformation.c 裡面的程式碼，再將 data 的資料夾放到 freeglut 裡面的 bin 資料夾，將 glm.c 改檔名為 glm.cpp，再從 CodeBlocks 增加進去，程式碼如下

#include <GL/glut.h>

#include "glm.h"

GLMmodel* pmodel= 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()

{

     glColor3f(1.00 ,1.00 ,0);

     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

     ///glutSolidTeapot( 0.3 );

     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);

     glutSwapBuffers();

}

int main(int argc, char**argv)

{

     glutInit(&argc, argv);

     glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

     glutCreateWindow("我是高御舜的week06");

     glutDisplayFunc(display);

     glClearColor(1,1,1,1);

    glEnable(GL_CULL_FACE);

    glCullFace(GL_BACK);

    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();

}