啵咕咕的圖學筆記week05

 ****電腦圖學之父    Ivan Sutherland*****

如同上週jsyeh.org/3dcg10.....

標準10行

#include <GL/glut.h> 

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glColor3f(1,1,0); 

    glutSolidTeapot(0.3); 

    glutSwapBuffers();

}

int main(int argc, char** argv) 

{

    glutInit( &argc, argv); 

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH ); 

    glutCreateWindow("week05"); 

    glutDisplayFunc(display); 

    glutMainLoop(); 

}

本週新程式

#include <GL/glut.h>

#include<stdio.h>

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glColor3f(1,1,0);

    glutSolidTeapot(0.3);

    glutSwapBuffers();

}

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

{

    printf("%c  %d,%d\n",key,x,y);

}

int main(int argc, char** argv)

{

    glutInit( &argc, argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week05");

    glutDisplayFunc(display);

    glutKeyboardFunc(keybord);

    glutMainLoop();

}

接續剛剛的

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

{

}

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

{

}

void motion(int x,int y)

{

}

int main(int argc, char** argv)

{

    glutInit( &argc, argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week05");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}

繼續

#include <GL/glut.h>

#include<stdio.h>

float x=150, y=150, z=0;

int oldX=0, oldY=0;

void display()

{

    glClearColor(0.5,0.5,0.5,1);

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glPushMatrix();

        glTranslatef((x-150)/150.0, -(y-150)/150.0,z);

        glColor3f(1,1,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

}

void mouse(int button,int state,int mouseX,int mouseY)

{

    oldX=mouseX; oldY=mouseY;

}

void motion(int mouseX,int mouseY)

{

    x += (mouseX-oldX); y +=(mouseY-oldY);

    oldX=mouseX; oldY=mouseY;

    display();

}

int main(int argc, char** argv)

{

    glutInit( &argc, argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week05");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}

縮放

#include <GL/glut.h>

#include<stdio.h>

float x=150, y=150, z=0, scale=1.0;

int oldX=0, oldY=0;

void display()

{

    glClearColor(0.5,0.5,0.5,1);

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glPushMatrix();

        glTranslatef((x-150)/150.0, -(y-150)/150.0,z);

        glScalef(scale, scale, scale);

        glColor3f(1,1,0);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

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

{

}

void mouse(int button,int state,int mouseX,int mouseY)

{

    oldX=mouseX; oldY=mouseY;

}

void motion(int mouseX,int mouseY)

{

    if(mouseX-oldX>0) scale*=1.01;

    if(mouseY-oldY<0) scale*=0.99;

    oldX=mouseX; oldY=mouseY;

    display();

}

int main(int argc, char** argv)

{

    glutInit( &argc, argv);

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week05");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutMainLoop();

}