TODO:到jsyeh.org/3dcg10
下載windows.zip
data.zip
glut32.dll
2.主題:移動、旋轉、縮放
#include <GL/glut.h>
float angle=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glRotatef(angle, 0,0,1);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
angle++;
}
int main(int argc, char*argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week04 transformation");
glutIdleFunc(display);
glutDisplayFunc(display);
glutMainLoop();
}
用滑鼠手動旋轉
#include <GL/glut.h>
float angle=0;
void display()
{
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glRotatef(angle, 0,0,1);
glutSolidTeapot(0.3);
glPopMatrix();
glutSwapBuffers();
///angle++;
}
void mouse(int button, int state, int x, int y)
{
}
void motion(int x, int y)
{
angle=x;
glutPostRedisplay();
}
int main(int argc, char*argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week04 transformation");
glutMouseFunc(mouse);
glutMotionFunc(motion);
///glutIdleFunc(display);
glutDisplayFunc(display);
glutMainLoop();
}
左鍵旋轉,右鍵移動
#include <stdio.h>
#include <GL/glut.h>
float angle=0, teapotX=0, teapotY=0;
int oldX=0, oldY=0, 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();
///angle++;
}
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;
oldX=x; oldY=y;
}
void motion(int x, int y)
{
if(nowRotate==1) angle += (x-oldX);
else {
teapotX += (x-oldX)/150.0;
teapotY += (oldY-y)/150.0;
}
oldX=x; oldY=y;
glutPostRedisplay();
}
int main(int argc, char*argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("week04 transformation");
glutMouseFunc(mouse);
glutMotionFunc(motion);
///glutIdleFunc(display);
glutDisplayFunc(display);
glutMainLoop();
}
3.範例:Transformation.exe
4.期中考題






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