2015電腦圖學: week-05

(1).自製3D模型

(2).利用mouse旋轉

(3).回家作業

首先先讓我們回顧上周及上上周的函式功能

#include <GL/glut.h>

float a=0;

void display()

{

glClear(GL_COLOR_BUFFER_BIT); ///清畫面

glRotatef(a,0,1,0); //--------------------->在y軸做旋轉

glutWireTorus(0.3,0.7,30,30);

glFlush();

a+=0.1; //------------------>角度每次改 0.1度

}

int main(int argc,char **argv)

{

glutInit(&argc,argv);

glutCreateWindow("02160270 冠羽");

glutDisplayFunc(display);

glutMainLoop();

}

緊接著試著改變成自己產生的圖形

其中

glPushMatrix();

.........程式碼

glPopMatrix(); ------------->為一個block

glBegin(GL_LINE_LOOP); ----------->一個block 可產生一個連線

........

glEnd();

再改成 3維的移動

三維向量(glVertex3f)-->三維向量就是指只有X軸跟Y軸跟Z軸

glVertex3f(X軸,Y軸,Z軸);

試著拉出會旋轉的長立方體

讓黑色邊線和它做疊合

做的特殊測試

利用2D 疊圖來做偽3D的電圖

#include <GL/glut.h>

float a=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT); ///清畫面

glPushMatrix();
glRotatef(a,0,1,0.4);
///前面是面
glColor3f(0,1,1);///------------------------------------->青藍色三角立體柱
glBegin(GL_POLYGON);
glVertex3f( 0.2, 0.2,0.8);
glVertex3f( 0.2,-0.2,0.8);
glVertex3f(-0.2,-0.2,0.8);
//glVertex3f(-0.2, 0.2,0.8);
glEnd();

glBegin(GL_POLYGON);
glVertex3f( 0.2, 0.2,-0.8);
glVertex3f( 0.2,-0.2,-0.8);
glVertex3f(-0.2,-0.2,-0.8);
//glVertex3f(-0.2, 0.2,-0.8);
glEnd();

glBegin(GL_QUAD_STRIP);
glVertex3f( 0.2, 0.2,0.8);
glVertex3f( 0.2, 0.2,-0.8);

glVertex3f( 0.2,-0.2,0.8);
glVertex3f( 0.2,-0.2,-0.8);

glVertex3f(-0.2,-0.2,0.8);
glVertex3f(-0.2,-0.2,-0.8);

//glVertex3f(-0.2, 0.2,0.8);
//glVertex3f(-0.2, 0.2,-0.8);
glEnd();
///後面是黑色邊線
glColor3f(0,0,0);
glBegin(GL_LINE_LOOP);
glVertex3f( 0.2, 0.2,0.8);
glVertex3f( 0.2,-0.2,0.8);
glVertex3f(-0.2,-0.2,0.8);
//glVertex3f(-0.2, 0.2,0.8);
glEnd();

glBegin(GL_LINE_LOOP);
glVertex3f( 0.2, 0.2,-0.8);
glVertex3f( 0.2,-0.2,-0.8);
glVertex3f(-0.2,-0.2,-0.8);
//glVertex3f(-0.2, 0.2,-0.8);
glEnd();

glBegin(GL_LINES);
glVertex3f( 0.2, 0.2,0.8);
glVertex3f( 0.2, 0.2,-0.8);

glVertex3f( 0.2,-0.2,0.8);
glVertex3f( 0.2,-0.2,-0.8);

glVertex3f(-0.2,-0.2,0.8);
glVertex3f(-0.2,-0.2,-0.8);

//glVertex3f(-0.2, 0.2,0.8);
//glVertex3f(-0.2, 0.2,-0.8);
glEnd();
///------------------------------------------

glRotatef(a,0,-1,0.4);
///前面是面
glColor3f(0,1,0); ///---------------------->綠色立體柱
glBegin(GL_POLYGON);
glVertex3f( 0.2, 0.2,0.8);
glVertex3f( 0.2,-0.2,0.8);
glVertex3f(-0.2,-0.2,0.8);
glVertex3f(-0.2, 0.2,0.8);
glEnd();

glBegin(GL_POLYGON);
glVertex3f( 0.2, 0.2,-0.8);
glVertex3f( 0.2,-0.2,-0.8);
glVertex3f(-0.2,-0.2,-0.8);
glVertex3f(-0.2, 0.2,-0.8);
glEnd();

glBegin(GL_QUAD_STRIP);
glVertex3f( 0.2, 0.2,0.8);
glVertex3f( 0.2, 0.2,-0.8);

glVertex3f( 0.2,-0.2,0.8);
glVertex3f( 0.2,-0.2,-0.8);

glVertex3f(-0.2,-0.2,0.8);
glVertex3f(-0.2,-0.2,-0.8);

glVertex3f(-0.2, 0.2,0.8);
glVertex3f(-0.2, 0.2,-0.8);
glEnd();
///後面是黑色邊線
glColor3f(0,0,0);
glBegin(GL_LINE_LOOP);
glVertex3f( 0.2, 0.2,0.8);
glVertex3f( 0.2,-0.2,0.8);
glVertex3f(-0.2,-0.2,0.8);
glVertex3f(-0.2, 0.2,0.8);
glEnd();

glBegin(GL_LINE_LOOP);
glVertex3f( 0.2, 0.2,-0.8);
glVertex3f( 0.2,-0.2,-0.8);
glVertex3f(-0.2,-0.2,-0.8);
glVertex3f(-0.2, 0.2,-0.8);
glEnd();

glBegin(GL_LINES);
glVertex3f( 0.2, 0.2,0.8);
glVertex3f( 0.2, 0.2,-0.8);

glVertex3f( 0.2,-0.2,0.8);
glVertex3f( 0.2,-0.2,-0.8);

glVertex3f(-0.2,-0.2,0.8);
glVertex3f(-0.2,-0.2,-0.8);

glVertex3f(-0.2, 0.2,0.8);
glVertex3f(-0.2, 0.2,-0.8);
glEnd();

glPopMatrix();
glFlush();
a+=0.01;
}
int main(int argc,char **argv)
{
glutInit(&argc,argv);
glutCreateWindow("02160270 冠羽");

glutDisplayFunc(display);
glutIdleFunc(display);
glutMainLoop();
}

加入可使用滑鼠來旋轉的功能

#include <GL/glut.h>

#include <stdio.h>

float a=0 , a2 = 0;

void display()

{

glEnable(GL_DEPTH_TEST);///開啟Depth Test 深度測試 (近的會擋到遠的,遠的不會擋到近的)

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);///

glPushMatrix();

glRotatef(a,0,1,0);

glRotatef(a,1,0,0);

///前面是面

glColor3f(0,1,1);

glBegin(GL_POLYGON);

glVertex3f( 0.2, 0.2,0.8);

glVertex3f( 0.2,-0.2,0.8);

glVertex3f(-0.2,-0.2,0.8);

//glVertex3f(-0.2, 0.2,0.8);

glEnd();

glBegin(GL_POLYGON);

glVertex3f( 0.2, 0.2,-0.8);

glVertex3f( 0.2,-0.2,-0.8);

glVertex3f(-0.2,-0.2,-0.8);

//glVertex3f(-0.2, 0.2,-0.8);

glEnd();

glBegin(GL_QUAD_STRIP);

glVertex3f( 0.2, 0.2,0.8);

glVertex3f( 0.2, 0.2,-0.8);

glVertex3f( 0.2,-0.2,0.8);

glVertex3f( 0.2,-0.2,-0.8);

glVertex3f(-0.2,-0.2,0.8);

glVertex3f(-0.2,-0.2,-0.8);

//glVertex3f(-0.2, 0.2,0.8);

//glVertex3f(-0.2, 0.2,-0.8);

glEnd();

///後面是黑色邊線

glColor3f(0,0,0);

glBegin(GL_LINE_LOOP);

glVertex3f( 0.2, 0.2,0.8);

glVertex3f( 0.2,-0.2,0.8);

glVertex3f(-0.2,-0.2,0.8);

//glVertex3f(-0.2, 0.2,0.8);

glEnd();

glBegin(GL_LINE_LOOP);

glVertex3f( 0.2, 0.2,-0.8);

glVertex3f( 0.2,-0.2,-0.8);

glVertex3f(-0.2,-0.2,-0.8);

//glVertex3f(-0.2, 0.2,-0.8);

glEnd();

glBegin(GL_LINES);

glVertex3f( 0.2, 0.2,0.8);

glVertex3f( 0.2, 0.2,-0.8);

glVertex3f( 0.2,-0.2,0.8);

glVertex3f( 0.2,-0.2,-0.8);

glVertex3f(-0.2,-0.2,0.8);

glVertex3f(-0.2,-0.2,-0.8);

//glVertex3f(-0.2, 0.2,0.8);

//glVertex3f(-0.2, 0.2,-0.8);

glEnd();

glPopMatrix();

glFlush();

///a+=0.01;

}

void motion(int x, int y )

{

printf("%d %d\n",x,y);

a = x ;

a2 = y ;

}

int main(int argc,char **argv)

{

glutInit(&argc,argv);

glutInitDisplayMode(GLUT_DEPTH);///讓顯示的window有3D深度

glutCreateWindow("02160270 冠羽");

glutDisplayFunc(display);

glutIdleFunc(display);

glut

glutMotionFunc(motion); ///mouse 的 motion

glutMainLoop();

}

小葉老師在今天最後的補充能使轉動變得更自然
不會亂跳畫面

2015電腦圖學

2015年3月26日星期四

week-05

三維向量(glVertex3f)-->三維向量就是指只有X軸跟Y軸跟Z軸

glVertex3f(X軸,Y軸,Z軸);

沒有留言:

張貼留言

2015年3月26日 星期四

week-05

三維向量(glVertex3f)-->三維向量就是指只有X軸跟Y軸跟Z軸

glVertex3f(X軸,Y軸,Z軸);

沒有留言:

張貼留言

2015年3月26日星期四