



作業2 移動 旋轉 縮放
開啟 jsyeh.org/3dcg10
下載 data / windows / glut32.dll

開啟Transformation
glTranslatef (x, y, z)
glRotatef 角度 (旋轉, x, y, z)
glScalef調大小 (x, y, z)





作業3 教材與實作



移動滑鼠可移動茶壺位置
#include<GL/glut.h>
float nowX=0, nowY=0;
void mouse(int button, int state, int x, int y)
{
nowX = (x-150)/150.0; nowY = -(y-150)/150.0;
}
void display()
{
glClearColor(0.8, 1, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();///備份Matrix
glTranslatef(nowX, nowY, 0);///移動
glColor3f(0, 0, 1);
glutSolidTeapot(0.3);
glPopMatrix();///還原Matrix
glutSwapBuffers();
}
int main(int argc,char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("Hello 3D");
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMainLoop();
}
作業4 Mouse 進階


#include <GL/glut.h>
#include <stdio.h>
#include <math.h>
float nowX=0, nowY=0;
void mouse(int button, int state, int x, int y)
{
nowX = (x-150)/150.0; nowY = -(y-150)/150.0;
printf("glTranslatef(%f, %f, 0);\n", nowX, nowY);
}
void display()
{
glClearColor(0.8, 1, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();///備份Matrix
glTranslatef(nowX, nowY, 0);///移動
glColor3f(0, 0.5, 1);
//glutSolidTeapot(0.3);
glBegin(GL_POLYGON);
for(float angle=0; angle<3.14159265358979*2; angle+=0.1){
glVertex2f( 0.2*cos(angle), 0.2*sin(angle) );
}
glEnd();
glPopMatrix();///還原Matrix
glutSwapBuffers();
}
int main(int argc,char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("Hello 3D");
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMainLoop();
}
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