電腦圖學
1.主題:旋轉Rotation2.十座:glRotatef()
3.滑鼠轉 自動轉
右手旋轉定則
x=0,y=1,z=0(大拇指指向)
x=1,y=1,z=0(大拇指指向)
實作
自動旋轉的茶壺
#include <GL/glut.h>
float angle=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle,0,1,0);今天新教的
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
angle+=3;每執行這行就加一點點
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week05 rotate");
glutDisplayFunc(display);
glutIdleFunc(display);IDLE閒閒沒事就重畫
glutMainLoop();
}
用滑鼠控制茶壺轉動
#include <GL/glut.h>
float angle=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle,0,1,0);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void motion(int x,int y)
{
angle=x;
display();
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week05 rotate");
glutDisplayFunc(display);
glutIdleFunc(display);
glutMotionFunc(motion);
glutMainLoop();
}
float angle=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle,0,1,0);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void motion(int x,int y)
{
angle=x;
display();
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week05 rotate");
glutDisplayFunc(display);
glutIdleFunc(display);
glutMotionFunc(motion);
glutMainLoop();
}
滑鼠按下去 彈起來
#include <GL/glut.h>
float angle=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle,0,1,0);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
}
void motion(int x,int y)
{
angle=x;
display();
}
#include <stdio.h>
void mouse(int button,int state,int x,int y)
{
printf("%d %d %d %d\n",button,state,x,y);
}
int main(int argc,char**argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week05 rotate");
glutDisplayFunc(display);
glutIdleFunc(display);
glutMotionFunc(motion);
glutMouseFunc(mouse);
glutMainLoop();
}
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