鴻潤車業誰規定的week03

 week03

step01-1下載課本範例

https://jsyeh.org/3dcg10/     下載 win32和data並且解壓縮

把data丟到window裡

再點Transformation.exe  跑出頁面 

可以調整角度 拉動綠色數字即可

step01-2  跟以往一樣先打開OpenGL

刪除main.cpp再複製上週十行程式(從github上面找)

#include <GL/glut.h>

void display()

{

        glutSolidTeapot(0.3);

        glutSwapBuffers();

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week02");

  glutDisplayFunc(display);

 glutMainLoop();

}

step02-1 想要貼出有顏色的程式碼 用gist.github，但我不想用沒覺得比較好看

step02-2

移動物體

#include <GL/glut.h>

void display()

{

    glPushMatrix();///備份矩陣

        glTranslated(0.5,0.5,0);///改變矩陣

        glutSolidTeapot(0.3);

    glPopMatrix();///還原矩陣

        glutSwapBuffers();

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week03");

  glutDisplayFunc(display);

 glutMainLoop();

}

step03-1

開啟新的專案複製step02-2程式碼再加上(紅色)或改變(藍色)

#include <GL/glut.h>

float X=0,Y=0,Z=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT );

    glPushMatrix();

        glTranslated(X,Y,Z);

        glutSolidTeapot(0.3);

    glPopMatrix();

        glutSwapBuffers();

}

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

{

    X=(x-150)/150.0;

    Y=-(y-150)/150.0;

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week03");

glutMouseFunc(mouse);

  glutDisplayFunc(display);

 glutMainLoop();

}

step03-2

用滑鼠作畫

刪除中間程式再加一些(紅色)  畫圖(藍色)

#include <GL/glut.h>

#include<stdio.h>

float X=0,Y=0,Z=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT );

    glBegin(GL_POLYGON);

    

    glEnd();

        glutSwapBuffers();

}

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

{

    X=(x-150)/150.0;

    Y=-(y-150)/150.0;

    if(state==GLUT_DOWN)    printf("  glVertex2f(%.2f,%.2f);\n",X,Y);

}

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

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

glutCreateWindow("week03");

glutMouseFunc(mouse);

  glutDisplayFunc(display);

 glutMainLoop();

}

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