八隻八哥八筆記 week04

Week-4

Step1
搜尋網址:  @jsyeh.org/3dcg10/
利用此網站下載 data(模型),win32(主角),glut32.dll檔

利用模組來複習跟溫習程式

Step2
複習程式
glTranslatef(x,y,z);///移動
glRotatef(angle*角度*,x,y,z);///轉動
glScalef(x,y,z);///縮放
glBegin(GL_POLYGON);///開始畫
      glColor3f(r,g,b);///顏色
      glVertex3f(x,y,z);///頂點
glEnd();///結束畫   與glBegin()對應


Step3
利用茶壺旋轉複習
***程式碼***
#include <GL/glut.h>///開啟GL外掛
#include <stdio.h>
float angle=0;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);///清理畫面
    glPushMatrix();
        glRotatef(angle,0,0,1);///轉動
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();///秀出東西
    printf("%.1f\n",angle);
    angle++;
}

int main(int argc, char*argv[])///主函式
{
   glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
   glutCreateWindow("05160400Week4");
   glutDisplayFunc(display);
   glutIdleFunc(display);
   glutMainLoop();

}

Step4

利用茶壺手動點擊旋轉
***程式碼***
#include <GL/glut.h>///開啟GL外掛
#include <stdio.h>
float angle=0;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);///清理畫面
    glPushMatrix();
        glRotatef(angle,0,0,1);///轉動
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();///秀出東西

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

}
void motion(int x, int y)
{
    angle=x;///改變angle值
    glutPostRedisplay();///重畫
}
int main(int argc, char*argv[])///主函式
{
   glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
   glutCreateWindow("05160400Week4");
   glutMouseFunc(mouse);
   glutMotionFunc(motion);
   glutDisplayFunc(display);
   glutMainLoop();

}

Step5

任意移動

***程式碼***

#include <GL/glut.h>///開啟GL外掛

#include <stdio.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);///清理畫面

    glPushMatrix();

        glTranslatef(teapotX, teapotY, 0);

        glRotatef(angle,0,0,1);///轉動

        glutSolidTeapot(0.3);

    glPopMatrix();///還原矩陣

    glutSwapBuffers();///秀出東西

}

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();

}

int main(int argc, char*argv[])///主函式

{

   glutInit(&argc, argv);

   glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

   glutCreateWindow("05160400Week4");

   glutMouseFunc(mouse);

   glutMotionFunc(motion);

   glutDisplayFunc(display);

   glutMainLoop();

}