Processing Forum

Screen name:
takuya.tatsui

takuya.tatsui's Profile

1 Posts

4 Responses

0 Followers

Activity Trend

Last 30 days

Loading Chart...

Show:

Expanded view
List view

I'm sorry in poor English.I want to draw a picture on the trajectory of the light.

[9 Replies]
- 03-Jul-2013 03:01 AM
- Forum: Core Library Questions
Please Help I'm in trouble if there is no time.

I want to draw a picture on the trajectory of the light. Please tell me how someone.

Drawing, such as a combination of these codes is an ideal.

I want to replace the "brightness tracking" and "mouse tracking".

I do not know what to do this destination.

This is the youtube video of reference.

do want to make the brightness tracking of this.

http://www.youtube.com/watch?v=UmAgE5i8eEY

//////////////////////////////////
1. /**
2. * Brightness Tracking
3. * by Golan Levin.
4. *
5. * Tracks the brightest pixel in a live video signal.
6. */
9. import processing.video.*;
11. Capture video;
13. void setup() {
14. size(640, 480);
15. // Uses the default video input, see the reference if this causes an error
16. video = new Capture(this, width, height);
17. video.start();
18. noStroke();
19. smooth();
20. }
22. void draw() {
23. if (video.available()) {
24. video.read();
25. image(video, 0, 0, width, height); // Draw the webcam video onto the screen
26. int brightestX = 0; // X-coordinate of the brightest video pixel
27. int brightestY = 0; // Y-coordinate of the brightest video pixel
28. float brightestValue = 0; // Brightness of the brightest video pixel
29. // Search for the brightest pixel: For each row of pixels in the video image and
30. // for each pixel in the yth row, compute each pixel's index in the video
31. video.loadPixels();
32. int index = 0;
33. for (int y = 0; y < video.height; y++) {
34. for (int x = 0; x < video.width; x++) {
35. // Get the color stored in the pixel
36. int pixelValue = video.pixels[index];
37. // Determine the brightness of the pixel
38. float pixelBrightness = brightness(pixelValue);
39. // If that value is brighter than any previous, then store the
40. // brightness of that pixel, as well as its (x,y) location
41. if (pixelBrightness > brightestValue) {
42. brightestValue = pixelBrightness;
43. brightestY = y;
44. brightestX = x;
45. }
46. index++;
47. }
48. }
49. // Draw a large, yellow circle at the brightest pixel
50. fill(255, 204, 0, 128);
51. ellipse(brightestX, brightestY, 200, 200);
52. }
53. }
//////////////////////////////////////////////
1. final int num = 50;
2. int[] x = new int[num];
3. int[] y = new int[num];
5. void setup()
6. {
7. size(800, 600);
8. smooth();
9. }
11. void draw()
12. {
13. background(0);
15. // Shadow
16. // stroke(160);
17. // for(int i = 0; i < num - 1; i++)
18. // {
19. // strokeWeight(i + 1);
20. // line(x[i] + 10, y[i] + 10, x[i + 1] + 10, y[i + 1] + 10);
21. // }
23. // Outline
24. stroke(0);
25. for(int i = 0; i < num - 1; i++)
26. {
27. strokeWeight(i + 10);
28. line(x[i], y[i], x[i + 1], y[i + 1]);
29. }
31. // Fill
32. stroke(255);
33. for(int i = 0; i < num - 1; i++)
34. {
35. strokeWeight(i + 1);
36. line(x[i], y[i], x[i + 1], y[i + 1]);
37. }
38. }
40. void mouseMoved()
41. {
42. for(int i = num - 1; i > 0; i--)
43. {
44. x[i] = x[i-1];
45. y[i] = y[i-1];
46. }
47. x[0] = mouseX;
48. y[0] = mouseY;
49. }

«Prev
Next »