Week05

滑鼠拖曳可移動小茶壺:

 程式碼:

 #include <GL/glut.h>

float mouseX=0, mouseY=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT);

    glPushMatrix();///備份起來

        glTranslatef(mouseX, mouseY, 0);

        glutSolidTeapot(0.3);

    glPopMatrix();///還原回去

    glutSwapBuffers();

}

void motion(int x, int y)

{

    mouseX = (x-150)/150.0;

    mouseY = -(y-150)/150.0;

    glutPostRedisplay();

}

int main( int argc, char **argv )

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("04163031");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutMainLoop();

}

如圖:

滑鼠拖曳可縮放茶壺

程式碼:

#include <GL/glut.h>

float mouseX=0, mouseY=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT);///清掉舊的畫面

    glPushMatrix();///備份起來

        glScalef(mouseX, mouseY, 0);///改size縮放

        glutSolidTeapot(0.3);

    glPopMatrix();///還原回去

    glutSwapBuffers();///交換繪圖的memory buffer,才能畫出來

}

void motion(int x, int y)

{

    mouseX = (x-150)/150.0;

    mouseY = -(y-150)/150.0;

    glutPostRedisplay();///貼一張3M Post便利貼,告訴電腦的GLUT要畫畫面Re display

}

int main( int argc, char **argv )

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("04163031");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutMainLoop();

}

如圖:

滑鼠拖曳可旋轉茶壺

程式碼:

#include <GL/glut.h>

float mouseX=0, mouseY=0, rotX=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT| GL_DEPTH_BUFFER_BIT);///清掉舊的畫面

    glPushMatrix();///備份起來

        //glScalef(mouseX, mouseY, 0);///改size縮放

        glRotatef(rotX, 0,0,1);

        glutSolidTeapot(0.3);

    glPopMatrix();///還原回去

    glutSwapBuffers();///交換繪圖的memory buffer,才能畫出來

}

void motion(int x, int y)

{

    mouseX = (x-150)/150.0;

    mouseY = -(y-150)/150.0;

    rotX = x;

    glutPostRedisplay();///貼一張3M Post便利貼,告訴電腦的GLUT要畫畫面Re display

}

int main( int argc, char **argv )

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH);

    glutCreateWindow("04163031");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutMainLoop();

}

如圖: