Grafika Komputer : Pensil 3D

brikut ini adalah code untuk membentuk objek pensil 3D dalam OpenGL.semoga bermanfaat buat teman-teman.


#include <glut.h>
#include <math.h>


void cylinder(float rbase,float rtop,float height);
void pipe(float rbase,float rtop,float height,int resolusi);
void blok(float tebal,int ratiol,int ratiop);

double rotation_y=0,rotation_y_plus=-15,direction;
double Move=30,Moveplus=0;
double rotate_All=0;


GLfloat ambient_light[]={0.0,0.0,0.0,0.0};

GLfloat  source_light[]={1.0,0.0,1.0,1.0};

GLfloat     light_pos[]={100,100.0,0.0,4.0};


void draw3D(void)
{
glClearColor(0.0,1.0,0.0,0.1);  //putih
glShadeModel(GL_SMOOTH);
glViewport(10,100,480,480);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(58.0,(GLfloat)640/(GLfloat)480,1.0,200.0);

glEnable (GL_DEPTH_TEST);
glPolygonMode   (GL_FRONT_AND_BACK,GL_FILL);
glEnable (GL_LIGHTING);
glLightModelfv  (GL_LIGHT_MODEL_AMBIENT,ambient_light);
glLightfv (GL_LIGHT0,GL_DIFFUSE,source_light);
glLightfv (GL_LIGHT0,GL_POSITION,light_pos);
glEnable (GL_LIGHT0);
glEnable (GL_COLOR_MATERIAL);
glColorMaterial (GL_FRONT,GL_AMBIENT_AND_DIFFUSE);
}


GLUquadricObj* quadObj;

void display(void)
{
quadObj = gluNewQuadric();
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();

glTranslatef(0.0,0.,-90);
glPushMatrix();
 glRotatef(1.0,1.0,1.0,1.0);
 glRotatef(rotate_All,1.0,1.0,1.0);

 Move++;//arah putaran
 Move=Move-Moveplus;
     glRotatef(Move,0.0,1.0,0.1);
 Moveplus=10;//kecepatan
 glTranslatef(1.0,0.0,0.);

//mata pensil
 glColor3f(0,0,0);
 glTranslatef(0.0,0,0);
     //glRotatef(180,1,0,0);
 pipe(1.1,0,2.1,10);

//ujung pensil
 glColor3f(10,3,0);
 glTranslatef(0.0,0,-4.6);
     //glRotatef(180,1,0,0);
 pipe(2.7,0,6.10,10);

//badan pensil
 glColor3f(0,0,1);
 glTranslatef(0,0,-42);
 //glRotatef(-39,1,0,0);
 cylinder(1,0.6,40.10);

//penhapus
 glColor3f(1,5,0);
 glTranslatef(0,0,-7);
 //glRotatef(-39,1,0,0);
 cylinder(1,0.0,20.90);





 /*glColor3f(1,0,0);
 glTranslatef(0,0,28);
 gluCylinder(quadObj, 5.412, 4.25, 8, 50, 50);

 glColor3f(0,1,0);
 glTranslatef(0,0,-17.5);
 gluCylinder(quadObj, 1.9, 8, 8, 50, 50);*/

 glPopMatrix();


glFlush();
glutSwapBuffers();
}


void pipe(float rbase,float rtop,float height, int resolusi)
{
float i;
glPushMatrix();
glTranslatef(0.0,0.0,-rbase/4);
for(i=0;i<=height;i+=rbase/8)
{
glTranslatef(0.0,0.0,rbase/8);
glutSolidTorus(rbase/4,rbase-((i*(rbase-rtop))/height),4,resolusi);
}
glTranslatef(0.0,0.0,rbase/4);
glPopMatrix();
}

void cylinder(float rbase,float rtop,float height)
{
float i;
glPushMatrix();
glTranslatef(0,0.0,-rbase/4);
for(i=0;i<=height;i+=rbase/8)
{
glTranslatef(0,0.0,rbase/8);
glutSolidTorus(3,rbase-((i*(rbase-rtop))/height),20,16);
}
glTranslatef(0,0.0,rbase/4);
glPopMatrix();
}



int main(int argc,char **argv)
{


glutInit(&argc,argv);
glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB|GLUT_DEPTH);
glutInitWindowSize(700,540);
glutInitWindowPosition(0,0);
glutCreateWindow("Pensil");
glutDisplayFunc(display);
glutIdleFunc(display);
draw3D();
glutMainLoop();
return(0);
}