91 week03

 1.到https://jsyeh.org/3dcg10/下載 windows.zip 和 data.zip

2.windows.zip 和 data.zip 解壓縮 下載 Transformation.exe

執行:

綠色xyz可以移動

week03-1:開 freeglut 壓縮檔再拉到桌面

\freeglut\lib裡libfreeglut.a複製成libglut32.a

開code blocks 選glut專案 名稱: week01-2_GLUT 把目錄改設成桌面的freeglut

最後執行

修改main.cpp

複製貼上:

#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("GLUT Shapes");

    glutDisplayFunc(display);

    glutMainLoop();

}

第二步:

使用github gist貼上week02-1的程式碼，副檔名.cpp

修改程式:

增加:

#include <GL/glut.h>

void display()

{

    glPushMatrix();//備份矩陣

    glTranslatef(0.5,0.5,0);//會改變矩陣

    glutSolidTeapot( 0.3 );

    glPopMatrix();//還原矩陣

    glutSwapBuffers();

}

week03-2:

開新的GLUT project

複製week03-1程式碼再貼上程式碼

再修改程式碼:

#include <GL/glut.h>

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

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

    glTranslatef(X,Y,Z);

    glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

void mouse(int button,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();

}

 

week03-3_homework:

修改程式:

#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);

    glPushMatrix();

    glTranslatef(X,Y,Z);

    glutSolidTeapot( 0.3 );

    glPopMatrix();

    glutSwapBuffers();

}

void mouse(int button,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();

}

註記:

glBegin(GL.POLYGON);

glVertex2f(中間座標......);

glEnd();