2024電腦圖學二乙: week06

#week06

#期中考練習

https://jsyeh.org/gl/opengl_10_func.html

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##10行程式

#include <GL/glut.h>///使用GLUT外掛

void display()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glutSolidTeapot(0.3);

glutSwapBuffers();

}

int main(int argc, char *argv[])

{

glutInit(&argc, argv);///初始化 GLUT 140

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);///143

glutCreateWindow("week06-1_lighting");///145

glutDisplayFunc(display);///148 display函式

glutMainLoop();///174 迴圈

}

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##week06-0_sample_code

1.安裝freeglut, 解壓縮放置桌面改檔名

2.創建glut 專案 week06-0_sample_code

3.Ctrl f 尋找light 程式

#20行程式

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);

'--------------------------------------------------------------------------------------------

#week06-1_lighting

1.創建新專案 week06-1_lighting

2.貼上11程式

3.貼上20行程式

#程式碼

#include <GL/glut.h>///使用GLUT外掛

void display()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glutSolidTeapot(0.3);

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 };

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[])

{

glutInit(&argc, argv);///初始化 GLUT 140

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);///143

glutCreateWindow("week06-1_lighting");///145

glutDisplayFunc(display);///148 display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();///174 迴圈

}

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#課本範例

1.開啟網址 https://jsyeh.org/3dcg10/

2. 下載 window data 解壓縮開啟範例

#更改光源位子

1. 更改數值

light_position 變亮

light_diffuse 變色

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##week06-2_lighting_glNormal3f

1.新增glut 專案 week06-2_lighting_glNormal3f

2.貼上上一個程式

3.把茶壺變成正方形

4.加上mouse 轉動正方形

##程式碼

#include <GL/glut.h>///使用GLUT外掛

float angle =0;

void display()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

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();

}

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

const GLfloat light_diffuse[] = { 0.0f, 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[])

{

glutInit(&argc, argv);///初始化 GLUT 140

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);///143

glutCreateWindow("week06-1_lighting");///145

glutDisplayFunc(display);///148 display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();///174 迴圈

}

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##week06-3_glm_obj_model

1.新增專案 week06-3_glm_obj_model

2.貼上10行程式

3.參考 source.zip 裡面的 transformation.c 找glm 開頭的程式

4.glm.h glm.c放置 week06-3_glm_obj_model裡

5.glm.c 改成glm.cpp

6.專案右鍵新增專案將glm.cpp 放入

7.將data 資料夾複製到桌面freeglut\bin 執行目錄裡

8.將茶壺SolidTeapot(0.3) 改成drawmodel();

##程式碼

#include <GL/glut.h>///使用GLUT外掛

#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);

}

void display()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

drawmodel();

glutSwapBuffers();

}

int main(int argc, char *argv[])

{

glutInit(&argc, argv);///初始化 GLUT 140

glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);///143

glutCreateWindow("week06-1_lighting");///145

glutDisplayFunc(display);///148 display函式

glutMainLoop();///174 迴圈

}

2024電腦圖學二乙

2024年3月25日星期一

week06

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張貼留言

2024年3月25日 星期一

week06

沒有留言:

張貼留言

2024年3月25日星期一