2021電腦圖學二甲: 06050596

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2021年5月19日星期三

電腦圖學筆記-week13

1. 裝freeglut

2. 裝OpenCV 設定

C:\OpenCV2.1\include

C:\OpenCV2.1\lib

cv210 cxcore210 highgui210

3. hackmd.io/@jsyeh/opengl 有貼圖範例

#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>
GLuint id1, id2; ///TODO:增加2個 貼圖ID
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;
}
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glBindTexture(GL_TEXTURE_2D, id1);
    glutSolidTeapot(0.3);

    glBindTexture(GL_TEXTURE_2D, id2);
    glBegin(GL_POLYGON);
        glTexCoord2f( 0, 0 ); glVertex2f( -1, -1 );
        glTexCoord2f( 0, 1 ); glVertex2f( -1, +1 );
        glTexCoord2f( 1, 1 ); glVertex2f( +1, +1 );
        glTexCoord2f( 1, 0 ); glVertex2f( +1, -1 );
    glEnd();
    glutSwapBuffers();
}
int main(int argc, char** argv)
{
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
    glutCreateWindow(" Week08 ");
    glutDisplayFunc(display);

    id1 = myTexture("puipui.jpg");
    id2 = myTexture("bg.jpg");
    glEnable(GL_DEPTH_TEST);
    glutMainLoop();
}

4. Fiile-New-Project, 創GLUT專案

6. 把 Diffuse.jpg、 bg.jpg 圖檔放到 /freeglut/bin

7.結果

8.把 freeglut\bin 的 freeglut.dll 、Diffuse.jpg 及 bg.jpg 移到專案目錄 week13

移至

9.把 week13_robot\week13.cbp 專案檔打開，兩行working_dir 要改成 "." 再存檔

改成

3. glm模式

3.1. 檔案準備好 source.zip (glm.h glm.cpp(改), transformation.c)

3.2. 模型準備好 gundam還沒切開.zip 裡有 Gundam.obj Gundam.mtl Diffuse.jpg

3.3. 要加入程式 (在week13_robot 專案中, Add 把 glm.cpp 加入)

結果

3.4. 用 Notepad++ 開 transformation.c 要偷裡面的程式

#include "glm.h"

GLMmodel * pmodel = NULL;

再 copy drawmodel() 的函式, 改glmReadOBJ("檔名") 及改右邊 glmDraw(... GLM_TEXTURE) , 並在 display()裡叫 drawmodel()

3.5. 圖檔Diffuse.jpg需要上下翻轉,存檔後再執行即可

#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>

#include "glm.h"

GLMmodel * pmodel = NULL;

GLuint id1, id2; ///TODO:增加2個貼圖ID

void

drawmodel(void)

{

if (!pmodel) {

pmodel = glmReadOBJ("Gundam.obj");

if (!pmodel) exit(0);

glmUnitize(pmodel);

glmFacetNormals(pmodel);

glmVertexNormals(pmodel, 90.0);

}

glmDraw(pmodel, GLM_SMOOTH | GLM_TEXTURE);

}

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;

}

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glBindTexture(GL_TEXTURE_2D, id1);

drawmodel();//glutSolidTeapot(0.3);

glBindTexture(GL_TEXTURE_2D, id2);

glBegin(GL_POLYGON);

glTexCoord2f( 0, 0 ); glVertex2f( -1, -1 );

glTexCoord2f( 0, 1 ); glVertex2f( -1, +1 );

glTexCoord2f( 1, 1 ); glVertex2f( +1, +1 );

glTexCoord2f( 1, 0 ); glVertex2f( +1, -1 );

glEnd();

glutSwapBuffers();

}

int main(int argc, char** argv)

{

glutInit( &argc, argv );

glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

glutCreateWindow(" Week13 ");

glutDisplayFunc(display);

id1 = myTexture("Diffuse.jpg");

id2 = myTexture("bg.jpg");

glEnable(GL_DEPTH_TEST);

glutMainLoop();

}

4.1. 先整體旋轉 glPushMatrix(); glRotatef(角度, 0,1,0); 畫圖; glPopMatrix();

程式碼:

#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>

#include "glm.h"

GLMmodel * pmodel = NULL;

GLuint id1, id2; ///TODO:增加2個貼圖ID

void

drawmodel(void)

{

if (!pmodel) {

pmodel = glmReadOBJ("Gundam.obj");

if (!pmodel) exit(0);

glmUnitize(pmodel);

glmFacetNormals(pmodel);

glmVertexNormals(pmodel, 90.0);

}

glmDraw(pmodel, GLM_SMOOTH | GLM_TEXTURE);

}

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;

}

float angle=180;

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glBindTexture(GL_TEXTURE_2D, id1);

glPushMatrix();

glRotatef(angle,0,1,0);

drawmodel();//glutSolidTeapot(0.3);

glPopMatrix();

glBindTexture(GL_TEXTURE_2D, id2);

glBegin(GL_POLYGON);

glTexCoord2f( 0, 0 ); glVertex2f( -1, -1 );

glTexCoord2f( 0, 1 ); glVertex2f( -1, +1 );

glTexCoord2f( 1, 1 ); glVertex2f( +1, +1 );

glTexCoord2f( 1, 0 ); glVertex2f( +1, -1 );

glEnd();

glutSwapBuffers();

}

int main(int argc, char** argv)

{

glutInit( &argc, argv );

glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

glutCreateWindow(" Week13 ");

glutDisplayFunc(display);

id1 = myTexture("Diffuse.jpg");

id2 = myTexture("bg.jpg");

glEnable(GL_DEPTH_TEST);

glutMainLoop();

}

4.2. 背景的圖,移一下

5.1. 先把(許多小)模型準備好 body.obj body.mtl, arm1.obj arm1.mtl, arm2.obj arm2.mtl

5.2. 把 GLMmodel * body = NULL 等都加上許多指標 (body, arm1, arm2)

2021年5月12日星期三

電腦圖學筆記-week12

1. 用3D Exploration將obj檔轉成cpp檔

save as ...

新增紅框中的兩行

紅框注解掉

// (LPLOGPALETTE) lpPalette = (LPLOGPALETTE)HeapAlloc (hHeap, 0,

// sizeof (LOGPALETTE) + (nColors * sizeof (PALETTEENTRY)));

結果

3.改旋轉方式(紅改藍)

glRotatef (nAngle, 0.0f, 1.0f, 0.0f);

glScalef (3,3,3);

#include <GL/glut.h>

void display(){

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glRotatef(180,0,1,0);

glutSolidTeapot(0.5);

glPopMatrix();

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)

{

glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);

glutInit(&argc, argv);

glutCreateWindow("week12");

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);

glutDisplayFunc(display);

glutMainLoop();

return 0;

}

2021年5月5日星期三

電腦圖學筆記-week11

1.開新專案，加3個檔案，

2.將transformation.c複製到main.cpp

3.將data(模型資料)加到執行目錄

4.刪減複製編寫簡短的3D模型

#include <GL/glut.h>

#include "glm.h"

GLMmodel * pmodel=NULL;

void drawmodel(void)

{

if (!pmodel) {

pmodel = glmReadOBJ("data/Al.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)

{

glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);

glutInit(&argc, argv);

glutCreateWindow("week11");

glutDisplayFunc(display);

glutMainLoop();

return 0;

}

5.加上打光&旋轉

打光:

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)

{

glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);

glutInit(&argc, argv);

glutCreateWindow("week11");

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);

glutDisplayFunc(display);

glutMainLoop();

return 0;

}

完整程式碼:

#include <GL/glut.h>

#include "glm.h"

GLMmodel * pmodel=NULL;

void drawmodel(void)

{

if (!pmodel) {

pmodel = glmReadOBJ("data/Al.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);

glPushMatrix();

glRotatef(180,0,1,0);

drawmodel();

glPopMatrix();

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)

{

glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);

glutInit(&argc, argv);

glutCreateWindow("week11");

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);

glutDisplayFunc(display);

glutMainLoop();

return 0;

}

6.顯示鋼彈模型

#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(){

glClearColor(1,0,0,0);

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glPushMatrix();

glRotatef(180,0,1,0);

drawmodel();

glPopMatrix();

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)

{

glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);

glutInit(&argc, argv);

glutCreateWindow("week11");

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);

glutDisplayFunc(display);

glutMainLoop();

return 0;

}

2021年4月28日星期三

電腦圖學筆記-week10

1.撥放wav音檔，放出聲音

檔案位置:

2.連續撥放do,re,mi,fa,so，每個音間隔5秒

#include<windows.h>

int main()

{

PlaySound("do.wav",NULL,SND_SYNC);

PlaySound("re.wav",NULL,SND_SYNC);

PlaySound("mi.wav",NULL,SND_SYNC);

PlaySound("fa.wav",NULL,SND_SYNC);

PlaySound("so.wav",NULL,SND_SYNC);

}

3.按鍵盤發出音階聲

4.接第3題，按鍵盤發出音階聲加上茶壺

調每個音間隔的秒數

5.接第4題，在背景加上MP3背景音

6.接第5題，加上滑鼠事件，點擊滑鼠發出音效

#include<windows.h>

#include<stdio.h>

#include<GL/glut.h>

#include "CMP3_MCI.h"

CMP3_MCI mp3;

void display()

{

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

glutSolidTeapot(0.3);

glutSwapBuffers();

}

void keyboard(unsigned char key,int x,int y)

{

if(key=='1')PlaySound("do.wav",NULL,SND_SYNC);

if(key=='2')PlaySound("re.wav",NULL,SND_SYNC);

if(key=='3')PlaySound("mi.wav",NULL,SND_SYNC);

if(key=='4')PlaySound("fa.wav",NULL,SND_SYNC);

if(key=='5')PlaySound("so.wav",NULL,SND_SYNC);

}

void mouse(int butto,int state,int x,int y)

{

PlaySound("shot.wav",NULL,SND_SYNC);

}

int main(int argc,char** argv)

{

mp3.Load("mus.mp3");

mp3.Play();

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

glutCreateWindow("week10");

glutDisplayFunc(display);

glutKeyboardFunc(keyboard);

glutMouseFunc(mouse);

glutMainLoop();

}

7..接第6題，加上滑鼠事件，滑鼠左中右鍵分別發出不同音效

2021年4月14日星期三

電腦圖學筆記-week08

1.複習上周的貼圖

2.放2張圖

#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>

GLuint id1, id2; ///TODO:增加2個貼圖ID

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;

}

void display()

{

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glBindTexture(GL_TEXTURE_2D, id1);

glutSolidTeapot(0.3);

glBindTexture(GL_TEXTURE_2D, id2);

glBegin(GL_POLYGON);

glTexCoord2f( 0, 1 ); glVertex2f( -1, -1 );

glTexCoord2f( 0, 0 ); glVertex2f( -1, +1 );

glTexCoord2f( 1, 0 ); glVertex2f( +1, +1 );

glTexCoord2f( 1, 1 ); glVertex2f( +1, -1 );

glEnd();

glutSwapBuffers();

}

int main(int argc, char** argv)

{

glutInit( &argc, argv );

glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

glutCreateWindow(" Week08 ");

glutDisplayFunc(display);

id1 = myTexture("puipui.jpg");

id2 = myTexture("1.png");

glEnable(GL_DEPTH_TEST);

glutMainLoop();

}

3.開啟範例程式

2021年4月7日星期三

電腦圖學筆記-week07

1.使用網址:https://openprocessing.org/sketch/1157158

體驗可以利用網路互動的畫板

2.開啟範例程式，開始了解貼圖

2.安裝opencv

選第2個add環境變數

安裝位子不變

3.設定opwncv的環境變數

新增

C:\OpenCV2.1\include 路徑到compiler

新增

C:\OpenCV2.1\lib 路徑到 linker

4.建新專案

5.寫程式碼顯示圖片

#include <opencv/highgui.h>

int main(int argc,char** argv)

{

IplImage*img=cvLoadImage("test.png");

cvShowImage("pic",img);

cvWaitKey(0);

}

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