week07講一個關於三角形的笑話(最下面)

複習上上週的茶壺點擊變換位子和上週的打光效果(上圖為打光)

讓茶壺可以藉由W鍵(移動)及E鍵(旋轉)控制

程式碼如下

--------------------------------------------------------------------------------------------------------------------------

#include <GL/glut.h>
const GLfloat light_ambient[] = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat light_diffuse[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_position[] = { 2.0f, 5.0f, -5.0f, 0.0f };
const GLfloat mat_ambient[] = { 0.7f, 0.7f, 0.7f, 1.0f };
const GLfloat mat_diffuse[] = { 0.8f, 0.8f, 0.8f, 1.0f };
const GLfloat mat_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat high_shininess[] = { 100.0f };
float teapotX=0, teapotY=0;
int oldX=0, oldY=0;
int type=1;///1=旋轉2=移動
float teapotRotY=0;
void mouse(int button, int state, int x , int y)
{
    oldX=x;
    oldY=y;
}
void motion(int x , int y)
{
    if(type==1)
    {
        teapotRotY += (x-oldX);
    }
    if(type==2)
    {
        teapotX += x-oldX;
        teapotY += -(y-oldY);
    }
    oldX=x;
    oldY=y;
    glutPostRedisplay();
}
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
    glTranslatef(teapotX/250.0, teapotY/250.0,0);
    glRotatef(teapotRotY,0,-1,0);///x⽅向移動
    glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}
#include <stdio.h>
void keyboard(unsigned char key,int x,int y)
{
    if(key=='e' ||key=='E')type=1;
    if(key=='w' ||key=='W')type=2;
    printf("now:%c\n",key);
}

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitWindowSize(500,500);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("GLUT Shapes");
    glutDisplayFunc(display);
    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    glutKeyboardFunc(keyboard);
    ///加入函⽰
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);
    glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
    glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);
    glutMainLoop();
    return EXIT_SUCCESS;
}

--------------------------------------------------------------------------------------------------------------------------

笑話

有一天，三角形約正方形和長方形去看電影

當天，只有正方形和長方形到了約定地點

.

.

.

.

.

.

.

.

.

.

.

.

.

.

乾 全等三角形