電腦圖學課程week15 叡

 

Week15-1

https://jsyeh.org/3dcg10/下載windows、data兩個壓縮檔

將data放入windows開啟Projection.exe

 

Week15-2

調整他的up

Week15-3

fovy:field of view   (y方向)視野的角度

aspect:aspect ratio     長寬比

Week15-4

開啟glut專案並修改

Week15-5

#include <GL/glut.h>
void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glutSolidTeapot (0.3);
    glutSwapBuffers();
}
void reshape (int w, int h){
    glViewport(0,0,w,h);
    float ar=w/(float)h;
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective( 60, ar, 0.01, 1000);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0,0,1 ,0,0,0 ,0,1,0);

    glutPostRedisplay();
}
int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("week15");
    glutDisplayFunc (display);
    glutReshapeFunc (reshape);
    glutMainLoop();
}

Week15-6    

#include <GL/glut.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glutSolidTeapot (0.3);

    glutSwapBuffers();

}

void reshape (int w, int h){

    glViewport(0,0,w,h);

    float ar=w/(float)h;

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    gluPerspective( 60, ar, 0.01, 1000);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    gluLookAt(0,0,1 ,0,0,0 ,0,1,0);

    glutPostRedisplay();

}

float eyeX = 0, eyeY = 0;

void motion(int x, int y){

    eyeX = (x-150.0)/150.0;

    eyeY = (150.0-y)/150,0;

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    gluLookAt(eyeX,eyeY,1,0,0,0,0,1,0);

    glutPostRedisplay();

}

int main(int argc, char** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("week15");

    glutMotionFunc(motion);

    glutDisplayFunc (display);

    glutReshapeFunc (reshape);

    glutMainLoop();

}