2020電腦圖學B: Sunnnnnnnnnnnnnn

-第六週-

前面教怎麼用Teams

為防疫做好準備

來先來複習上週的打光Light

接下來是複習查理

程式碼底家:

#include <GL/glut.h>
#include <stdio.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 };

int type=1; /// type1轉動 type2移動
float teapotX=0, teapotY=0;
float teapotRotY=0;
int oldX=0, oldY=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();///備份矩陣
glTranslatef(teapotX/250.0, teapotY/250.0,0);
glRotatef(teapotRotY , 0,-1,0);
glutSolidTeapot(0.3);
glPopMatrix();///備份矩陣
glutSwapBuffers();
teapotRotY+=3; ///每次轉動3度
}
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); ///印出現在的字母確定沒錯
}
int main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("GLUT Shapes");
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutKeyboardFunc(keyboard); ///註冊Keyboard函式
glutIdleFunc(display); ///沒事就重畫
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;
}

之後加上一些程式碼
可以讓使用者決定要移動還是轉動