電腦圖學筆記-week02

 

1.開新的專案

2.點選紅框中的圖示

3.設定路徑

4.反白86-92行程式碼

5.程式執行結果

6.開新的專案

7.設定資料夾

執行結果

8.刪減程式碼

#include <GL/glut.h>

static void display(void)

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("06050596 good!");

    glutDisplayFunc(display);

    glutMainLoop();

}

9.新增 glutSolidTeapot(0.3);

#include <GL/glut.h>

static void display(void)

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("06050596 good!");

    glutDisplayFunc(display);

    glutMainLoop();

}

執行結果

10.    茶壺顏色改紅色

使用    glColor3f( 1, 0, 0);    改顏色

#include <GL/glut.h>

static void display(void)

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f( 1, 0, 0);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("06050596 good!");

    glutDisplayFunc(display);

    glutMainLoop();

}

11.程式合併

#include <GL/glut.h>

static void display(void)

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glBegin(GL_TRIANGLES);

    glColor3f(1.0f, 0.0f, 0.0f);   glVertex2f(0.0f,   1.0f);

    glColor3f(0.0f, 1.0f, 0.0f);   glVertex2f(0.87f,  -0.5f);

    glColor3f(0.0f, 0.0f, 1.0f);   glVertex2f(-0.87f, -0.5f);

    glEnd();

    glColor3f( 0.5, 0.4, 0.6);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("06050596 good!");

    glutDisplayFunc(display);

    glutMainLoop();

}

12.改變形狀

#include <GL/glut.h>

static void display(void)

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glBegin(GL_LINE_LOOP);

    glColor3f(1.0f, 0.0f, 0.0f);   glVertex2f(0.0f,   1.0f);

    glColor3f(0.0f, 1.0f, 0.0f);   glVertex2f(0.87f,  -0.5f);

    glColor3f(0.0f, 0.0f, 1.0f);   glVertex2f(-0.87f, -0.5f);

    glEnd();

    glColor3f( 0.5, 0.4, 0.6);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("06050596 good!");

    glutDisplayFunc(display);

    glutMainLoop();

}

#include <GL/glut.h>

#include <math.h>

static void display(void)

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glBegin(GL_LINE_LOOP);

    glColor3f(1.0f, 0.0f, 0.0f);   glVertex2f(0.0f,   1.0f);

    glColor3f(0.0f, 1.0f, 0.0f);   glVertex2f(0.87f,  -0.5f);

    glColor3f(0.0f, 0.0f, 1.0f);   glVertex2f(-0.87f, -0.5f);

    glEnd();

    glBegin(GL_POLYGON);

    glColor3f(0.0f, 0.0f, 1.0f);

    for(float b=0;b<=3.141596*2;b+=0.01){

        glVertex2f(cos(b),sin(b));

    }

    glEnd();

    glBegin(GL_POLYGON);

    glColor3f(1.0f, 1.0f, 0.0f);

    for(float a=0;a<=3.141596;a+=0.01){

        glVertex2f(0.5*cos(a),0.5*sin(a));

    }

    glEnd();

    glColor3f( 0.5, 0.4, 0.6);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("06050596 good!");

    glutDisplayFunc(display);

    glutMainLoop();

}

 13.解釋 argv作用