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hammerguard
hammergua..

3D Arrow

in General Discussion  •  Other  •  1 year ago  
Can someone (help me) create a 3D arrow using beginShape()?

Replies(7)

hammerguard
hammergua..

Re: 3D Arrow

1 year ago
Like this but better, if there is a better way. I'm assuming there is...
Copy code
  1. float inc = 0;

  3. void setup() {
  4.   size(600, 400, P3D);
  5.   noStroke();
  6. }

  8. void draw() {
  9.   background(0);
  10.   lights();

  12.   fill(255);
  13.   translate(width/2, height/2, 0);
  14.   rotateY(inc);
  15.   rotateX(inc);
  16.   inc += .01;

  18.   beginShape();
  19.   vertex(0, 0, 0);
  20.   vertex(50, -50, 0);
  21.   vertex(100, 0, 0);
  22.   endShape();
  23.   beginShape();
  24.   vertex(25, 0, 0);
  25.   vertex(25, 50, 0);
  26.   vertex(75, 50, 0);
  27.   vertex(75, 0, 0);
  28.   endShape();
  29.   beginShape();
  30.   vertex(0, 0, 50);
  31.   vertex(50, -50, 50);
  32.   vertex(100, 0, 50);
  33.   endShape();
  34.   beginShape();
  35.   vertex(25, 0, 50);
  36.   vertex(25, 50, 50);
  37.   vertex(75, 50, 50);
  38.   vertex(75, 0, 50);
  39.   endShape();
  40.   beginShape();
  41.   vertex(0, 0, 0);
  42.   vertex(0, 0, 50);
  43.   vertex(50, -50, 50);
  44.   vertex(50, -50, 0);
  45.   endShape();
  46.   beginShape();
  47.   vertex(50, -50, 0);
  48.   vertex(50, -50, 50);
  49.   vertex(100, 0, 50);
  50.   vertex(100, 0, 0);
  51.   endShape();
  52.   beginShape();
  53.   vertex(100, 0, 0);
  54.   vertex(100, 0, 50);
  55.   vertex(75, 0, 50);
  56.   vertex(75, 0, 0);
  57.   endShape();
  58.   beginShape();
  59.   vertex(75, 0, 0);
  60.   vertex(75, 0, 50);
  61.   vertex(75, 50, 50);
  62.   vertex(75, 50, 0);
  63.   endShape();
  64.   beginShape();
  65.   vertex(75, 50, 0);
  66.   vertex(75, 50, 50);
  67.   vertex(25, 50, 50);
  68.   vertex(25, 50, 0);
  69.   endShape();
  70.   beginShape();
  71.   vertex(25, 50, 0);
  72.   vertex(25, 50, 50);
  73.   vertex(25, 0, 50);
  74.   vertex(25, 0, 0);
  75.   endShape();
  76.   beginShape();
  77.   vertex(25, 0, 0);
  78.   vertex(25, 0, 50);
  79.   vertex(0, 0, 50);
  80.   vertex(0, 0, 0);
  81.   endShape();
  82. }

cedrickiefer
cedrickie..

Re: 3D Arrow

1 year ago
what do you mean by "better". that already looks quite good. or do you mean "less code" ?
if thats the problem and you plan to use it more often you can create a arrow function and just call that.
if you dont want code like that add all, you can use one of the model loader library and load a 3d model of an arrow. 
hammerguard
hammergua..

Re: 3D Arrow

1 year ago
Yeah I mean less code. I'm sure there must be a more efficient way to draw a simple arrow. I don't fully understand how this vertex stuff works
cedrickiefer
cedrickie..

Re: 3D Arrow

1 year ago
now that i look at it again, i see you are using a lot of begin and endshapes that you actually dont need. you could for example draw the arrow front in one go...

  beginShape();
  vertex(-50,50);
  vertex(0, 0);
  vertex(50, 50);
  vertex(25,50);
  vertex(25,100);
 vertex(-25,100);
 vertex(-25,50);
  endShape(CLOSE);

but i think there is more room for optimization. lets see how far we get
hammerguard
hammergua..

Re: 3D Arrow

1 year ago
I got a better one. Anything else I can do?
Copy code
  1. float inc = 0;

  3. void setup() {
  4.   size(600, 400, P3D);
  5.   noStroke();
  6. }

  8. void draw() {
  9.   background(0);
  10.   lights();

  12.   fill(255);
  13.   translate(width/2, height/2, 0);
  14.   rotateY(inc);
  15.   rotateX(inc);
  16.   inc += .01;

  18.   beginShape();
  19.   vertex(0, 0, 0);
  20.   vertex(50, -50, 0);
  21.   vertex(100, 0, 0);
  22.   vertex(75, 0, 0);
  23.   vertex(75, 50, 0);
  24.   vertex(25, 50, 0);
  25.   vertex(25, 0, 0);
  26.   endShape();
  27.   beginShape();
  28.   vertex(0, 0, 50);
  29.   vertex(50, -50, 50);
  30.   vertex(100, 0, 50);
  31.   vertex(75, 0, 50);
  32.   vertex(75, 50, 50);
  33.   vertex(25, 50, 50);
  34.   vertex(25, 0, 50);
  35.   endShape();
  36.   beginShape(QUAD_STRIP);
  37.   vertex(0, 0, 0);
  38.   vertex(0, 0, 50);
  39.   vertex(50, -50, 0);
  40.   vertex(50, -50, 50);
  41.   vertex(100, 0, 0);
  42.   vertex(100, 0, 50);
  43.   vertex(75, 0, 0);
  44.   vertex(75, 0, 50);
  45.   vertex(75, 50, 0);
  46.   vertex(75, 50, 50);
  47.   vertex(25, 50, 0);
  48.   vertex(25, 50, 50);
  49.   vertex(25, 0, 0);
  50.   vertex(25, 0, 50);
  51.   vertex(0, 0, 0);
  52.   vertex(0, 0, 50);
  53.   endShape();
  54. }
cedrickiefer
cedrickie..

Re: 3D Arrow

1 year ago
Copy code
  2. float inc = 0;
  3.  

  5. void setup() {
  6.   size(600, 400, P3D);
  7.   noStroke();  
  8.  
  9. }

  11. void draw() {
  12.  background(0);
  13.  lights();
  14.  translate(width/2,height/2);
  15.  rotateY(inc);
  16.  rotateX(inc);
  17.  fill(255);
  18.  arrow();
  19.  

  21.   inc += .01;

  23. }



  27. void arrow() {
  28.   int[] x = {-50, 0, 50, 25, 25, -25, -25, -50};
  29.   int[] y = {50, 0, 50, 50, 100, 100, 50, 50};
  30.   beginShape();
  31.   for (int i = 0;i<8;i++)vertex(x[i], y[i]);
  32.   endShape(CLOSE);
  33.   beginShape();
  34.   for (int i = 0;i<8;i++)vertex(x[i], y[i], 25);
  35.   endShape(CLOSE);
  36.   beginShape(QUAD_STRIP);
  37.   for (int i = 0;i<8;i++) {
  38.     vertex(x[i], y[i]);
  39.     vertex(x[i], y[i], 25);
  40.   }
  41.   endShape(CLOSE);
  42. }
hammerguard
hammergua..

Re: 3D Arrow

1 year ago
Now that's efficient. Thanks!
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