逸臻的筆記Week04－移動、旋轉、縮放

－移動、旋轉、縮放－

1.到jsyeh/3dcg10
下載 Window.zip 下載 \windows\Transformation.exe  (主角)
         data.zip 下載 \windows\data\  (很多模型)
         glut32.dll 下載 \windows\glut32.dill

glRotatef (角度,X軸,Y軸,Z軸)  各種旋轉

－考試會考－

#include <stdio.h>
#include <GL/glut.h>
float angle=0;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();///備份矩陣
        glRotatef(angle, 0,0,1);///旋轉angle度
        glutSolidTeapot(0.3);
    glPopMatrix();///還原矩陣
    glutSwapBuffers();
    printf("%.1f\n", angle);
    angle++;///每次角度加1度
}
int main(int argc, char*argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("Week04 transformation");
    glutIdleFunc(display);///很閒/Idle,去重畫
    glutDisplayFunc(display);
    glutMainLoop();
}

#include <stdio.h>

#include <GL/glut.h>

float angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();///備份矩陣

        glRotatef(angle, 0,0,1);///旋轉angle度

        glutSolidTeapot(0.3);

    glPopMatrix();///還原矩陣

    glutSwapBuffers();

    ///printf("%.1f\n", angle);angle++;///每次角度加1度

}

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

{

}

void motion(int x, int y)

{  ///當mouse在拖曳motion時

    angle=x;///去改變gangle值

    glutPostRedisplay();///請畫面重畫

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week04 transformation");

    glutMouseFunc(mouse);///mouse

    glutMotionFunc(motion);///montion

    ///glutIdleFunc(display);///很閒/Idle,去重畫

    glutDisplayFunc(display);

    glutMainLoop();

}

旋轉+移動

#include <stdio.h>

#include <GL/glut.h>

float angle=0, teapotX=0, teapotY=0;

int oldX=0, oldY=0, nowRotate=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();///備份矩陣

        glTranslatef(teapotX, teapotY, 0);

        glRotatef(angle, 0,0,1);///旋轉angle度

        glutSolidTeapot(0.3);

    glPopMatrix();///還原矩陣

    glutSwapBuffers();

    ///printf("%.1f\n", angle);angle++;///每次角度加1度

}

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

{

    if(button==GLUT_LEFT_BUTTON && state==GLUT_DOWN) nowRotate=1;

    if(button==GLUT_RIGHT_BUTTON && state==GLUT_DOWN) nowRotate=0;

    oldX=x; oldY=y;

}

void motion(int x, int y)

{

    if(nowRotate==1) angle += (x-oldX);

    else{

        teapotX += (x-oldX)/150.0;

        teapotY += (oldY-y)/150.0;

    }

    oldX=x; oldY=y;

    glutPostRedisplay();///請畫面重畫

}

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

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("Week04 transformation");

    glutMouseFunc(mouse);///mouse

    glutMotionFunc(motion);///montion

    ///glutIdleFunc(display);///很閒/Idle,去重畫

    glutDisplayFunc(display);

    glutMainLoop();

}