XC的筆記

 1.先複習上禮拜的TRT程式先貼上10行程式後加入正方形的程式

#include <GL/glut.h>

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glRectf(0.5,0.5,-0.5,-0.5);

    glutSwapBuffers();

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutInitWindowSize(600,600);

    glutCreateWindow("week13_rect_TRT");

    glutDisplayFunc(display);

    glutMainLoop();

    return 0;

}

1-2.加上TRT跟顏色並把旋轉部分註解掉

加上的程式碼為

    glPushMatrix();

        ///glTranslatef(x, y, z );

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

        ///glTranslatef( x2, y2, z2);

        glColor3f(1,0,0);

        glRectf(0.5,0.5,1.0,0.2);

    glPopMatrix();

整體程式碼

#include <GL/glut.h>

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glRectf(0.5,0.5,-0.5,-0.5);

    glPushMatrix();

        ///glTranslatef(x, y, z );

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

        ///glTranslatef( x2, y2, z2);

        glColor3f(1,0,0);

        glRectf(0.5,0.5,1.0,0.2);

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutInitWindowSize(600,600);

    glutCreateWindow("week13_rect_TRT");

    glutDisplayFunc(display);

    glutMainLoop();

    return 0;

1-3把紅色手臂傾斜45度

#include <GL/glut.h>

float angle=45, oldX=0;

void mouse(int button, int stste, int x, int y){

    oldX = x;

}

void motion(int x, int y){

    angle += (x-oldX);

    oldX = x;

    glutPostRedisplay();

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

    glColor3f(1,1,1);

    glRectf(0.5,0.5,-0.5,-0.5);

    glPushMatrix();

        glTranslatef(0.5, 0.5, 0);

        glRotatef(angle, 0, 0, 1);

        glTranslatef( -0.5, -0.4, 0);

        glColor3f(1,0,0);

        glRectf(0.5,0.5,1.0,0.2);

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc,char**argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutInitWindowSize(600,600);

    glutCreateWindow("week13_rect_TRT");

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutDisplayFunc(display);

    glutMainLoop();

    return 0;

}

2-1新增mouse函式 可用滑鼠操作

#include <GL/glut.h>

float angle=45;

float oldX=0;///舊X座標

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

{

    oldX = x;

}

void motion (int x, int y)

{

    angle += (x-oldX);

    oldX = x;

    glutPostRedisplay();

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f(1,1,1);

    glRectf(0.5,0.5,-0.5,-0.5);

    glPushMatrix();

        glRotatef(angle,0,0,1);

        glTranslatef(-0.5,-0.4,0);

        glColor3f(1,0,0);

        glRectf(0.5,0.5,1.0,0.3);

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc, char**argv)

{///進階的main函式

    glutInit( &argc, argv);///初始化

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH);///兩倍交換避免畫面閃爍+3D深度

//    glutInitWindowSize(600, 600);

    glutCreateWindow("week13_rect");///建視窗

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutDisplayFunc( display );///畫圖函式

    glutMainLoop();///主要迴圈

}

3-1

#include <GL/glut.h>

float angle=45;

float oldX=0;///舊X座標

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

{

    oldX = x;

}

void motion (int x, int y)

{

    angle += (x-oldX);

    oldX = x;

    glutPostRedisplay();

}

void display(){

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glColor3f(1, 1, 1);///白色身體

    glRectf(0.3, 0.5, -0.3, -0.2);

    glPushMatrix();///右半邊

        glTranslatef(0.3, 0.5, 0);///要掛的位子

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

        glTranslatef(-0.3, -0.4, 0);///旋轉中心

        glColor3f(1, 0, 0);///紅色手臂

        glRectf(0.3, 0.5, 0.8, 0.3);///上手臂

        glPushMatrix();

            glTranslatef(0.8, 0.4, 0);///(3)把下手肘掛在關節上

            glRotatef(angle, 0, 0, 1);///(2)旋轉

            glTranslatef(-0.8, -0.4, 0);///(1)把下手肘的旋轉中心放在正中心

            glColor3f(0, 1, 0);///綠色

            glRectf(0.8, 0.5, 1.1, 0.3);///下手肘

        glPopMatrix();

    glPopMatrix();

    glPushMatrix();///左半邊

        glTranslatef(-0.3, 0.5, 0);///要掛的位子

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

        glTranslatef(0.3, -0.4, 0);///旋轉中心

        glColor3f(1, 0, 0);///紅色手臂

        glRectf(-0.3, 0.5, -0.8, 0.3);///上手臂

        glPushMatrix();

            glTranslatef(-0.8, 0.4, 0);///(3)把下手肘掛在關節上

            glRotatef(angle, 0, 0, 1);///(2)旋轉

            glTranslatef(0.8, -0.4, 0);///(1)把下手肘的旋轉中心放在正中心

            glColor3f(0, 1, 0);///綠色

            glRectf(-0.8, 0.5, -1.1, 0.3);///下手肘

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc, char**argv)

{///進階的main函式

    glutInit( &argc, argv);///初始化

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH);///兩倍交換避免畫面閃爍+3D深度

//    glutInitWindowSize(600, 600);

    glutCreateWindow("week13_rect");///建視窗

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutDisplayFunc( display );///畫圖函式

    glutMainLoop();///主要迴圈

}

3.2

#include <GL/glut.h>

float angle[20],oldX=0;

int angleID=0;

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

    if( key=='0' ) angleID=0;

    if( key=='1' ) angleID=1;

    if( key=='2' ) angleID=2;

    if( key=='3' ) angleID=3;

}

void mouse(int button, int state , int x, int y)///mouse按下去

{

    oldX = x;

}

void motion(int x,int y)

{

    angle[angleID] += (x-oldX);

    oldX=x;

    glutPostRedisplay();

}

void display()

{

    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f(1, 1, 1);

    glRectf(0.3, 0.5, -0.3, -0.2);///四邊形Rectangle，表白色身體

    glPushMatrix();

        glTranslatef(0.3, 0.5, 0);///等下要掛到0.5,0.5

        glRotatef(angle[0], 0, 0, 1);///Z軸，(2)旋轉45度

        glTranslatef(-0.3, -0.4, 0);///(1)把旋轉中心放到正中心

        glColor3f(1, 0, 0);

        glRectf(0.3, 0.5, 0.8, 0.3);///畫手臂

        glPushMatrix();

            glTranslatef(0.8, 0.4, 0);///(3)把下手肘掛在關節上

            glRotatef(angle[1], 0, 0, 1);///(2)旋轉

            glTranslatef(-0.8, -0.4, 0 );///(1)把下手肘的旋轉中心，放正中心

        glColor3f(0,1,0);

        glRectf(0.8, 0.5, 1.1, 0.3);///畫下手肘

        glPopMatrix();

    glPopMatrix();

    glPushMatrix();

        glTranslatef(-0.3, 0.5, 0);///等下要掛到0.5,0.5

        glRotatef(angle[2], 0, 0, 1);///Z軸，(2)旋轉45度

        glTranslatef(0.3, -0.4, 0);///(1)把旋轉中心放到正中心

        glColor3f(1, 0, 0);

        glRectf(-0.3, 0.5, -0.8, 0.3);///畫手臂

        glPushMatrix();

            glTranslatef(-0.8, 0.4, 0);///(3)把下手肘掛在關節上

            glRotatef(angle[3], 0, 0, 1);///(2)旋轉

            glTranslatef(0.8, -0.4, 0 );///(1)把下手肘的旋轉中心，放正中心

        glColor3f(0,1,0);

        glRectf(-0.8, 0.5, -1.1, 0.3);///畫下手肘

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();///2被交換的buffer

}

int main(int argc,char ** argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutInitWindowSize(600,600);

    glutCreateWindow("Week13 rect TRT");

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutDisplayFunc(display);

    glutMainLoop();

}