I do enjoy the force sensor I got in week 5′s application class so I’ll definitely use it more in the assignment!
First I revisited the processing codes I wrote for week 2, which now seems to be a total mess. I didn’t know about the serialEvent callback then so I parsed the serial input in the draw loop, and I didn’t use BYTE output in the arduino board so I need to parse it as string. It worked pretty well but the revised the version is much better.
Codes:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | import processing.serial.*; Serial myPort; int window = 800; int[] values = new int[window - 100]; int index = 0; int input = 0; void setup() { size(window,window); background(0,30); smooth(); // List all the available serial ports: //println(Serial.list()); myPort = new Serial(this, Serial.list()[0], 9600); for (int i = 0;i<window - 100;i++) { values[i] = 0; } } void draw() { background(0,20); for (int i = 0; i < window - 100;i++) { int j = i + index; if (j >= (window - 100)) { j = j - (window - 100); } stroke(255,0,0,80); line(50 + i, (window - 50), 50 + i, (window - 50) - (values[j] * (window - 100) / 1024)); stroke(255,0,0,100); point(50 + i, (window - 50)); point(50 + i, (window - 50) - (values[j] * (window - 100) / 1024)); } } void serialEvent(Serial p) { input = p.read(); println("input:" + input); values[index] = input * 4; index++; if (index >= window - 100) { index = index - (window - 100); } } |
Then I thought about the nature of the force sensor and really wished I could visualize the “force” in the processing. So I adopted the “string” example bundled in the processing application and integrated it with the serial input.
Codes:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 | import processing.serial.*; // The serial port: Serial myPort; int input = 0; int lastInput = -1; // Spring drawing constants for top bar int s_height = 16; // Height int left = 150; // Left position int right = 250; // Right position int max = 300; // Maximum Y value int min = 20; // Minimum Y value boolean over = true; // If mouse over boolean move = false; // If mouse down and over // Spring simulation constants float M = 0.8; // Mass float K = 0.2; // Spring constant float D = 0.92; // Damping float R = 60; // Rest position // Spring simulation variables float ps = 60.0; // Position float vs = 0.0; // Velocity float as = 0; // Acceleration float f = 0; // Force void setup() { size(400, 400); rectMode(CORNERS); noStroke(); myPort = new Serial(this, Serial.list()[0], 9600); } void draw() { background(102); updateSpring(); drawSpring(); } void drawSpring() { // Draw base fill(0.2); float b_width = 0.5 * ps + -8; rect(width/2 - b_width, ps + s_height, width/2 + b_width, 350); } void updateSpring() { // Update the spring position if(!move) { f = -K * (ps - R); // f=-ky as = f / M; // Set the acceleration, f=ma == a=f/m vs = D * (vs + as); // Set the velocity ps = ps + vs; // Updated position } if(abs(vs) < 0.1) { vs = 0.0; } // Test if mouse is over the top bar /* if(mouseX > left && mouseX < right && mouseY > ps && mouseY < ps + s_height) { over = true; } else { over = false; } */ // Set and constrain the position of top bar if(move) { ps = map(input,0,255,min,max) - s_height/2; if (ps < min) { ps = min; } if (ps > max) { ps = max; } } } void serialEvent(Serial p) { input = p.read(); println("input:" + input); if (input > lastInput) { move = true; } else if (lastInput > input + 10 || input < 10) { move = false; } lastInput = input; } |
Post a Comment