欸冷 電腦圖學 week09

 Week09

**09-0_Sample

安裝 freeglut 將 lib\ligfreeglut

File-New-Project, GLUT專案 

*程式碼重新利用

安裝Git軟體

1.將GitHub 上週的程式碼 clone下來

-在小黑Git Bash裡指令;

-cd desktop

-git clone https://github.com/allennnnnnnnnn/2024graphicsb

-cd 2024graphicsb

-start .

2.確認環境沒問題

3.檢查專案設定是否需要修改

**week09-1_obj_gundam_opencv_texture_lighting 

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>

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;

}

///上週有做過, 請用剪貼的

#include <GL/glut.h>

#include "glm.h"

GLMmodel * pmodel = NULL;

void drawmodel(void)

{

    if (!pmodel) {

        pmodel = glmReadOBJ("gundam.obj");

        ///上週的模型檔,放在奇怪的目錄裡 桌面\freeglut\bin

        ///本週,要換更好的地方

        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();

    glRotatef(angle++,0,1,0);

    drawmodel(); ///glutSolidTeapot( 0.3 );

    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[])

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week09-1 obj gundam opencv texture lighting");

    glutDisplayFunc(display);

    myTexture("Diffuse.jpg");

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();

}

**week09-2茶杯系列

程式碼:

#include <GL/glut.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

    glTranslatef(-0.6,+0.3,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glPushMatrix();

        glTranslatef(+0.0,+0.3,0);

        glutSolidCube(0.3);

    glPopMatrix();

    glPushMatrix();

        glTranslatef(+0.6,+0.3,0);

        glutSolidSphere(0.3,30,30);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week09-2 glutSolid系列");

    glutDisplayFunc(display);

    glutMainLoop();

}

**week09-2茶杯+線條茶杯

程式碼:

#include <GL/glut.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

    glTranslatef(-0.6,+0.3,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glPushMatrix();

        glTranslatef(+0.0,+0.3,0);

        glutSolidCube(0.3);

    glPopMatrix();

    glPushMatrix();

        glTranslatef(+0.6,+0.3,0);

        glutSolidSphere(0.3,30,30);

    glPopMatrix();

    glPushMatrix();

        glTranslatef(-0.6,+0.3,0);

        glutWireTeapot(0.3);

    glPopMatrix();

    glPushMatrix();

        glTranslatef(+0.0,+0.3,0);

        glutWireCube(0.3);

    glPopMatrix();

    glPushMatrix();

        glTranslatef(+0.6,+0.3,0);

        glutWireSphere(0.3,30,30);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week09-2 glutSolid系列");

    glutDisplayFunc(display);

    glutMainLoop();

}