#include <GL/glut.h>
void display()
{
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glutSolidTeapot(1);
glPopMatrix();
glutSwapBuffers();
}
void motion(int x,int y)
{
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(x/80.0,y/200.0,5, //讓xy移動值縮小
0,0,0,
0,1,0);
glutPostRedisplay();
}
void resize(int w,int h)
{
glViewport(0,0,(GLsizei) w,(GLsizei) h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(65.0,(GLdouble) w/h,1.0,100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0.0,0.0,5.0,
0.0,0.0,0.0,
0.0,1.0,0.0);
}
int main(int argc,char **argv)
{
glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("camera");
glutDisplayFunc(display);
glutMotionFunc(motion);
glutReshapeFunc(resize);
glutMainLoop();
}
運鏡
#include <stdio.h>
#include <GL/glut.h>
void display()
{
glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glutSolidTeapot(1);
glPopMatrix();
glutSwapBuffers();
}
void motion(int x,int y)
{
glMatrixMode(GL_MODELVIEW);
glLoadIdentity(); //單位矩陣
gluLookAt(x/60.0, y/200.0, 5, //讓xy移動值縮小
0, 0, 0,
0, 1, 0);
glutPostRedisplay();
}
void resize(int w, int h)
{
glViewport( 0, 0, (GLsizei) w, (GLsizei) h);
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
gluPerspective( 65.0, (GLdouble) w / h,1.0, 100.0 );
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
gluLookAt( 0.0, 0.0, 5.0,
0.0, 0.0, 0.0,
0.0, 1.0, 0.0 );
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("camera");
glutDisplayFunc(display);
glutMotionFunc(motion); //運鏡
glutReshapeFunc(resize);
glutMainLoop();
}

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