1.看看旋轉
a.下載上禮拜講的教學檔案
b.看看Projection檔案
2.旋轉
b.輸入
flofut teapotX=0, teapotY=0,angle=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glTranslatef(teapotX,teapotY,0);
glRotatef(angle,0,0,1);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void motion(int x, int y)
{
angle=x;
glutPostRedisplay();
}
#include <stdio.h>
#include <GL/glut.h>
float teapotX=0, teapotY=0,angle=0;
int nowRotate=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glTranslatef(teapotX,teapotY,0);
glRotatef(angle,0,0,1);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void motion(int x, int y)
{
if(nowRotate==1) angle=x;
else{
teapotX=(x-150)/150.0;
teapotY=(150-y)/150.0;
}
glutPostRedisplay();
}
void mouse(int button,int state,int x,int y)
{
if(button==GLUT_LEFT_BUTTON && state==GLUT_DOWN) nowRotate=1;
if(button==GLUT_RIGHT_BUTTON && state==GLUT_DOWN) nowRotate==0;
}
int main(int argc, char**argv)
{
glutInit(&argc,argv);///初始的參數 照著丟進去
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);///兩個顯示的參數
glutCreateWindow("Week04 Rotate");///本周的windows標題
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMotionFunc(motion);
glutMainLoop();///主要的GLUT迴圈
}
3.期中考80分
glPushMatrix(); //備份矩陣
glTranslatef(x,y,z); //移動
glRotatef(angle,x,y,z); //轉動
glScalef(x,y,z); //縮放
glBegin(GL_POLYGON); //開始畫
glColor3f(r,g,b); //顏色
glVertex3f(x,y,z);頂點
glEnd(); //結束畫
glPopMatrix(); // 還原矩陣






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