Week 8

I worked on our given Assignment one Week 8. Another 3 hours just passed easily... Sorry but I don't have any screenshots or codes to provide because I didn't save any for Week 8's work. :P

Week 7

On Week 7 of Sememster 2, Computer Graphics lab session was regarding lighting. Lighting was pretty easy... just declaring the light source position, changing colours and it wasn't all that rocket science after all that.

The code:

#include "glut.h"

GLfloat angle = 0.0f;
GLfloat width = 40.0f;
GLfloat height = 30.0f;

double x = 0, y = 0;

void init(void)
{
GLfloat ambient[] = { 0.0, 0.0, 0.0, 1.0 };
GLfloat diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
GLfloat specular[] = { 1.0, 1.0, 1.0, 1.0 };
GLfloat position[] = { 0.0, 3.0, 2.0, 0.0 };
GLfloat lmodel_ambient[] = { 0.4, 0.4, 0.4, 1.0 };
glClearColor(0.0, 0.1, 0.1, 0.0);

//Enable Depth test
glShadeModel(GL_SMOOTH);
glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
glLightfv(GL_LIGHT0, GL_POSITION, position);
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
}

void DrawCylinder()
{
GLUquadricObj *Cylinder;
GLUquadricObj *Disk;

Cylinder = gluNewQuadric();
Disk = gluNewQuadric();

glColor3f(1,0,0);
gluCylinder(Cylinder,15,15,40,32,32);

glColor3f(0,1,0);
gluDisk(Disk,0.5,1.5,32,32);
gluQuadricDrawStyle(Cylinder, GLU_FILL);
}

void MyDisplay()
{
GLfloat mat_diffuse[] = { 0.2, 0.5, 1, 1.0 };
GLfloat mat_specular[] = { 0.8, 1.0, 1.0, 1.0 };
GLfloat low_shininess[] = { 2.0 };

glEnable(GL_DEPTH);
glClear(GL_COLOR_BUFFER_BIT GL_DEPTH_BUFFER_BIT);

glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
glMaterialfv(GL_FRONT, GL_SHININESS, low_shininess);

glPopMatrix();
//Lines
glBegin(GL_LINES);
glVertex3f(0,0,0);
glVertex3f(50,0,0);
glEnd();

glBegin(GL_LINES);
glVertex3f(0,0,0);
glVertex3f(0,50,0);
glEnd();

glBegin(GL_LINES);
glVertex3f(0,0,0);
glVertex3f(0,0,50);
glEnd();
//End of lines

glPushMatrix();
glTranslatef(::x,::y,0);

DrawCylinder();

glutSwapBuffers();
}

void Rescale(GLsizei w, GLsizei h)
{
glViewport(0,0,w,h);
}

void Keyboard(unsigned char key, int x, int y)
{
switch(key)
{
case 'd':
::x+=10;
break;
case 'a':
::x-=10;
break;
case 'w':
::y+=10;
break;
case 's':
::y-=10;
break;
}
glutPostRedisplay();
}

void SetupRC()
{
GLfloat final = width / height;
gluPerspective(60, final, 0, 1000);
gluLookAt(90,90,90,0,1,0,0,1,0);
glFlush();
glPushMatrix();
}

void main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE GLUT_RGB GLUT_DEPTH);
glutInitWindowSize(800, 600);
glutCreateWindow("My Pratical 7");
glutDisplayFunc(MyDisplay);
init();
glutReshapeFunc(Rescale);
glutKeyboardFunc(Keyboard);
SetupRC();
glutMainLoop();
}

Some pictures:

Week 6

Week 6

Week 6's Computer Graphics lesson was as enjoyable as it is frustrating. We had to deal with piecing our 3D cubes, sphere and quad. Pretty crazy when you have to think for an hour just to plot the dimensions of all the 3D figures, and then translate and rotate the objects accordingly. 3hours totally used without knowledge that time passed so quickly. I understood most parts but didn't catch everything really. Going to query classmates on how to complete the sphere and how not to allow the 3D figures to seperate during rotation.

Week 5

Week 5

Week 5's Computer Graphics lesson was moderately tough. The plotting in a 3D environment was annoying. Coordinates and more coordinates... mathematical calculations - my worst nightmare. We had to rely on matrice calculations to determine and plot our 3D cube. Finally when we succeeded, we had to move the cube around in the 3D environment, which was simple once you got the idea of how it all works. Pop and push.

Week 4

Week 4

Week 4 was pretty simple. Easily understable as it was like a repeat session of week 3, just that we create QUADS instead of Triangles this time.