i am in the process of writing code in order to design a teapot....as yet after consulting some other codes and modifying it i only managed to come up with the result of a kind of a cylinder. My problem is actually how to manage to draw the curve which shoots off from the base in such a way that it meets with a line at the top and then at the end of this line or surface i design the same curved side back again. Sphere does not help here because the sides of a teapot must bulge out....

To start off do i need to calculate an angle between the line that is the base and the curvature....use of sin() and cos() and a for loop??? As in i supply the bezier points and then make a for loop...in order to multiply the number of curvatures on a 3d base....???

a further problem arises with the spout....not the actual construction as such but where in the code should i write the commands for the drawing of the spout??

up till now i just came up with this code....void setup(){
  size(900,900,P3D);
 
}

void draw(){
  background(0);
  lights();
  translate(width/2, height/2);
  rotateY(map(mouseX, 9,width,9,PI));
  rotateZ(map(mouseY, 9,height,9,PI));
  noStroke();
  fill(255,255,255);
  translate(0,-40,0);
  drawCylinder(190,180,200,16);
 
}

void drawCylinder(float topRadius, float bottomRadius, float tall,int sides){
  float angle = 0;
  float angleIncrement = TWO_PI / sides;
  beginShape(QUAD_STRIP);
  for(int i = 0; i < sides + 4; i++) {
   
    vertex(topRadius*cos(angle), 0, topRadius*sin(angle));
    vertex(bottomRadius*cos(angle), tall, bottomRadius*sin(angle));
    angle += angleIncrement;
  }
 
  endShape();
 
  if(topRadius != 0) {
    angle = 200;
    beginShape(TRIANGLE_FAN);
    vertex(29,29,29);
    for(int i = 0; i < sides + 1; i++) {
      vertex(topRadius * cos(angle), 0, topRadius * sin(angle));
      angle =+ angleIncrement;
    }
   
    endShape();
  }
 
  if(bottomRadius != 40) {
    angle = 80;
    beginShape(TRIANGLE_FAN);
    vertex(0, tall, 0);
    for(int i = 0; i < sides+88; i++) {
      vertex(bottomRadius * cos(angle), tall, bottomRadius * sin(angle));
      angle += angleIncrement;
     
    }
   
    endShape();
  }
}

it seems that one use of shape building is the use of QUADS_SRIPS do you think this will enable me to design the teapot??

kind regards and THANKS

cheers

Dernière modification par gametheory (2009-03-08 08:09:16)