
先去 jsyeh.org/3dcg10 下載 window data glut.dll
按Transformation這個特效

程式碼:
#include <GL/glut.h>
#include <stdio.h>
#include <math.h>
void mouse(int button, int state, int x, int y)
{
if(state==GLUT_DOWN) printf(" glVertex2f((%d-150)150.0,-(%d-150)/150.0); \n",x,y);
}
void display()
{
glClearColor(150/255.0,170/255.0,55/255.0,1);
glClear(GL_COLOR_BUFFER_BIT);
glColor3ub(175,193,81);
glBegin(GL_POLYGON);
glVertex2f((185-150)/150.0,(46-150)/150.0);
glVertex2f((52-150)/150.0,(156-150)/150.0);
glVertex2f((163-150)/150.0,(231-150)/150.0);
glVertex2f((251-150)/150.0,(146-150)/150.0);
glEnd();
glBegin(GL_POLYGON);
glVertex2f((22-150)/150.0,-(25-150)/150.0);
glVertex2f((20-150)/150.0,-(81-150)/150.0);
glVertex2f((93-150)/150.0,-(77-150)/150.0);
glVertex2f((103-150)/150.0,-(19-150)/150.0);
glEnd();
glBegin(GL_POLYGON);
glVertex2f((214-150)/150.0,-(19-150)/150.0);
glVertex2f((217-150)/150.0,-(74-150)/150.0);
glVertex2f((127-150)/150.0,-(262-150)/150.0);
glVertex2f((185-150)/150.0,-(259-150)/150.0);
glVertex2f((152-150)/150.0,-(292-150)/150.0);
glEnd();
glBegin(GL_POLYGON);
glVertex2f((37-150)/150.0,-(113-150)/150.0);
glVertex2f((37-150)/150.0,-(183-150)/150.0);
glVertex2f((10-150)/150.0,-(145-150)/150.0);
glEnd();
glBegin(GL_POLYGON);
glVertex2f((256-150)/150.0,-(105-150)/150.0);
glVertex2f((255-150)/150.0,-(182-150)/150.0);
glVertex2f((287-150)/150.0,-(141-150)/150.0);
glEnd();
glutSwapBuffers();
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("hello3D");
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMainLoop();
}
可以製作出圓形

程式碼:
#include <GL/glut.h>
#include <stdio.h>
#include <math.h>
void mouse(int button, int state, int x, int y)
{
if(state==GLUT_DOWN) printf(" glVertex2f((%d-150)150.0,-(%d-150)/150.0); \n",x,y);
}
void display()
{
glClearColor(150/255.0,170/255.0,55/255.0,1);
glClear(GL_COLOR_BUFFER_BIT);
glColor3ub(175,193,81);
glPushMatrix();
glBegin(GL_POLYGON);
for(float angle=0;angle<3.14159265357989*2;angle+=0.1)
{
glVertex2f(0.2*cos(angle),0.2*sin(angle));
}
glEnd();
glPopMatrix();
glPushMatrix();
glTranslatef(0,0.5,0);
glBegin(GL_POLYGON);
for(float angle=0;angle<3.14159265357989*2;angle+=0.1)
{
glVertex2f(0.2*cos(angle),0.2*sin(angle));
}
glEnd();
glPopMatrix();
glPopMatrix();
glPushMatrix();
glTranslatef(-0.5,0,0);
glBegin(GL_POLYGON);
for(float angle=0;angle<3.14159265357989*2;angle+=0.1)
{
glVertex2f(0.2*cos(angle),0.2*sin(angle));
}
glEnd();
glPopMatrix();
glutSwapBuffers();
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
glutCreateWindow("hello3D");
glutDisplayFunc(display);
glutMouseFunc(mouse);
glutMainLoop();
}
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