哈囉你好嗎隨便 week06

1.模擬考
https://jsyeh.org/gl/opengl_10_func.html

2.week06-0_sample_code

1.開一個專案

2.126-134行 156-172行都是跟光有關

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 };

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);

3.week06-1_lighting

1.先貼上11行GLUT程式

2.拿20行程式來用

看看打燈效果

有一個立體茶壺

成果:

#include <GL/glut.h>

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);///清畫面

    glColor3f(1,1,1);///顏色(RGB)

    glutSolidTeapot(0.3);///就一個神燈

    glutSwapBuffers();///畫好提交

}

///第四個值還沒學到

const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };

const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };

///顏色RGB

const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };

const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };

///位置左右上下前後

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)///主函式 進階版 看不懂

{

    glutInit( &argc, argv);///把參數給glutInit 初始化

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );///雙緩衝區+3D深度功能

    glutCreateWindow("第6周的程式");///開GLUT視窗

    glutDisplayFunc(display);///用來顯示的函式

    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();

}

4.課本範例

1.https://jsyeh.org/3dcg10/下載data windows 去玩他

2.開Lighing.exe

5.week06-2_lightung_glNormal3f

1.開一個專案

2.貼上面的程式

3.把茶壺變成正方形

4.加上mouse轉動正方形

#include <GL/glut.h>

float angle=0;

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);///清畫面

    glPushMatrix();

        glRotatef (angle++, 0,1,0);

        glScalef(0.8,0.8,0.8);

        glBegin (GL_POLYGON);

            glNormal3f (0,0,1);

            glVertex2f(-1,-1);

            glVertex2f(+1,-1);

            glVertex2f(+1,+1);

            glVertex2f(-1,+1);

        glEnd();

    glPopMatrix();

    glutSwapBuffers();///畫好提交

}

const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };

const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 0.0f, 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 };

int main(int argc, char** argv)///主函式 進階版 看不懂

{

    glutInit( &argc, argv);///把參數給glutInit 初始化

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );///雙緩衝區+3D深度功能

    glutCreateWindow("第6周的程式");///開GLUT視窗

    glutDisplayFunc(display);///用來顯示的函式

    glutIdleFunc(display);

    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();

}

一個會轉的方形會變色

6.week06-3_glm_obj_model

1.開一個專案

2.11行glut

3.參考source.zip的東西

解壓 source.zip 在 transformation.c找 glm開頭的程式

#include "glm.h"

GLMmodel * pmodel = NULL;

讀模型、畫模型 void drawmodel (void)這個函式

將檔案準備好:

glm.h 放到專案目錄裡

 glm.c放到專案目錄裡,改檔名成 glm.cpp

專案,按右鍵,新增檔案,將glm.cpp 加入專案 

將 data 資料夾,複製到桌面\freeglut\bin 執行目錄裡(歷史餘毒)

把 glutSolidTeapot (0.3);換成 drawmodel();

cpp>>>

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);

}

貼一貼

有問題的話點這個

成果:

把模型讀進來