Computer Graphics Exercises (For Practice)

Your aswers to the questions must be at least approximated to real answers.

Questions:

1.- Draw a sphere of large 20 and make it rotate over its own axis.

2.- Draw a letter "E" .

3.- Draw a box(10); //of size 10*10 Now, using scale, convert it to a prism, with 40 of height, and a squared base of 10*10.

Answers:

1.-

float x=0;

void setup(){

size(500,500,P3D);

float fov = PI/3.0;

float cameraZ = (height/2.0) / tan(fov/2.0);

perspective(fov, float(width)/float(height), cameraZ/100.0, cameraZ*10.0);

}

void draw(){

background(0,0,0);

camera(50*mouseX/500.0, -50*mouseY/500.0,40, 0,0,0, 0,1,0);

x=x+1;

noFill();

stroke(255);

rotate(sin(x));

sphere(10);

}

2.-

float x;

void setup(){

size(500,500,P3D);

float fov = PI/3.0;

float cameraZ = (height/2.0) / tan(fov/2.0);

perspective(fov, float(width)/float(height), cameraZ/100.0, cameraZ*10.0);

}

void draw (){

background(0,0,0);

camera(50*mouseX/500.0, -50*mouseY/500.0,40, 0,0,0, 0,1,0);

strokeWeight(5);

stroke(255,0,0); //red

line(0,0,0, 10,0,0); //x axis

stroke(0,255,0); //green color

line(0,0,0, 0,-10,0); //Y axis

stroke(0,0,255);

line(0,0,0, 0,0,10);//Z

noFill();

stroke(255,255,255);

beginShape(TRIANGLES);

vertex(0,-10,0);

vertex(6,-10,0);

vertex(2,-8,0);

vertex(2,-8,0);

vertex(6,-10,0);

vertex(6,-8,0);

vertex(0,-10,0);

vertex(2,-8,0);

vertex(0,0,0);

vertex(2,-6,0);

vertex(4,-6,0);

vertex(4,-4,0);

vertex(2,-6,0);

vertex(2,-4,0);

vertex(4,-4,0);

vertex(0,0,0);

vertex(2,-8,0);

vertex(2,-2,0);

vertex(0,0,0);

vertex(2,-2,0);

vertex(6,0,0);

vertex(2,-2,0);

vertex(6,-2,0);

vertex(6,0,0);

vertex(0,-10,10);

vertex(6,-10,10);

vertex(2,-8,10);

vertex(2,-8,10);

vertex(6,-10,10);

vertex(6,-8,10);

vertex(0,-10,10);

vertex(2,-8,10);

vertex(0,0,10);

vertex(2,-6,10);

vertex(4,-6,10);

vertex(4,-4,10);

vertex(2,-6,10);

vertex(2,-4,10);

vertex(4,-4,10);

vertex(0,0,10);

vertex(2,-8,10);

vertex(2,-2,10);

vertex(0,0,10);

vertex(2,-2,10);

vertex(6,0,10);

vertex(2,-2,10);

vertex(6,-2,10);

vertex(6,0,10);

vertex(0,0,0);

vertex(0,0,10);

vertex(6,0,10);

vertex(0,0,0);

vertex(6,0,0);

vertex(6,0,10);

vertex(0,-10,0);

vertex(0,-10,10);

vertex(6,-10,10);

vertex(0,-10,0);

vertex(6,-10,0);

vertex(6,-10,10);

vertex(0,-10,0);

vertex(0,0,10);

vertex(0,-10,10);

vertex(6,0,0);

vertex(6,-2,0);

vertex(6,0,10);

vertex(6,-2,10);

vertex(6,-2,0);

vertex(6,0,10);

vertex(2,-2,0);

vertex(2,-2,10);

vertex(6,-2,0);

vertex(6,-2,10);

vertex(2,-2,10);

vertex(6,-2,0);

vertex(2,-8,0);

vertex(2,-8,10);

vertex(6,-8,0);

vertex(6,-8,10);

vertex(2,-8,10);

vertex(6,-8,0);

vertex(2,-2,0);

vertex(2,-4,0);

vertex(2,-2,10);

vertex(2,-2,10);

vertex(2,-4,10);

vertex(2,-4,0);

vertex(2,-6,0);

vertex(2,-8,0);

vertex(2,-6,10);

vertex(2,-6,10);

vertex(2,-8,10);

vertex(2,-8,0);

vertex(4,-4,0);

vertex(4,-6,0);

vertex(4,-4,10);

vertex(4,-4,10);

vertex(4,-6,10);

vertex(4,-6,0);

endShape();

}

3.-

void setup(){

size(500,500,P3D);

float fov = PI/3.0;

float cameraZ = (height/2.0) / tan(fov/2.0);

perspective(fov, float(width)/float(height), cameraZ/100.0, cameraZ*10.0);

}

void draw(){

background(0,0,0);

camera(50*mouseX/500.0, -50*mouseY/500.0,40, 0,0,0, 0,1,0);

noFill();

stroke(255);

scale(1,4);

box(10);

}

#computergraphics #processing