Week 04 湘雯的筆記

1.下載老師網站上的[data.zip]、[windows.zip]、[glut32.dll]並解壓縮打開[Transformation]嘗試更改車子的各個數值理解各個數值改變的意義

2.打開GLUT專案 嘗試使用程式碼將茶壺往x方向移動0.5(Translate)

程式碼:
#include <GL/glut.h>
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glTranslatef(0.5,0,0);///most important
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}
int main(int argc,char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("04162443 TRS");

    glutDisplayFunc(display);
    glutMainLoop();
}

3.加入motion讓茶壺可以用滑鼠移動位置

程式碼:

#include <GL/glut.h>

float mouseX=0,mouseY=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glTranslatef(mouseX,mouseY,0);///most important

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void motion(int x,int y)

{

    mouseX = (x-150)/150.0;

    mouseY = -(y-150)/150.0;

    glutPostRedisplay();

}

int main(int argc,char **argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("04162443 TRS");

    glutDisplayFunc(display);

    glutMotionFunc(motion);

    glutMainLoop();

}

4.複習小精靈

程式碼:
#include <GL/glut.h>
#include<math.h>
float mouth=0;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);///把畫面清空才能在重畫時沒有殘影
    glColor3f(1,1,0);///顏色
    glBegin(GL_TRIANGLE_FAN);///開始畫
        glVertex2f(0,0);///圓心
        for(float angle=0+mouth;angle<=3.1415926*2-mouth;angle+=0.01){
            glVertex2f( cos(angle), sin(angle) );
                }
                glEnd();///結束畫
    glutSwapBuffers();
}
void motion(int x,int y)
{
    mouth = x/300.0;
    glutPostRedisplay();
}
int main(int argc,char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("04162443 TRS");

    glutDisplayFunc(display);
    glutMotionFunc(motion);
    glutMainLoop();
}