-
Notifications
You must be signed in to change notification settings - Fork 0
/
sketch.js
213 lines (165 loc) · 4.42 KB
/
sketch.js
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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
// =============================================================================
// Program: Double Pendilum Simulator
// Author: Gabe Postacchini
// Description: Double Pendilum Simulator, largely based on the Code Train Project
// Date Last Modified: 10-30-2020
// Version: 1.2
// 'use strict';
// =============================================================================
// External Force Variables:
let g = 1;
let dr = 0.999
let trailLength = 10000;
let coords = [0, 0];
let button;
// Circle 1 Variables:
let c1x = 0;
let c1y = 0;
let c1v = 0
let a1 = 2;
let m1 = 25
let r1 = 200;
// Circle 2 Variables:
let c2x = 0;
let c2y = 0;
let c2v = 0;
let a2 = 2;
let m2 = 25;
let r2 = 200;
// Sliders and Buttons:
function setup() {
createCanvas(windowWidth, windowHeight);
translate(windowWidth / 2, windowHeight / 5);
// Sliders text and buttons:
slider1 = createSlider(100, 500, 200);
slider1.position(25, 60);
slider1.style('width', '200px');
slider2 = createSlider(100, 500, 200);
slider2.position(25, 100);
slider2.style('width', '200px')
slider3 = createSlider(10, 250, 25);
slider3.position(25, 140);
slider3.style('width', '200px')
slider4 = createSlider(10, 250, 25);
slider4.position(25, 180);
slider4.style('width', '200px')
slider5 = createSlider(0, 10, 1);
slider5.position(25, 220);
slider5.style('width', '200px')
slider6 = createSlider(0.5, 1, 1, 0.001);
slider6.position(25, 260);
slider6.style('width', '200px')
slider7 = createSlider(0, 10000, 0, 2);
slider7.position(25, 300);
slider7.style('width', '200px')
button1= createButton('Reset');
button1.position(25, 340);
button1.mousePressed(reset);
}
function reset () {
a1 = 2;
a2 = 2;
c1v = 0;
c2v = 0;
c1a = 0;
c2a = 0;
trailLength = 0;
coords = [];
}
function draw() {
translate(windowWidth / 2, windowHeight / 5);
background(100);
smooth();
// Trail
coords.push(c2x);
coords.push(c2y);
for(i = coords.length; i > 0; i -= 2){
stroke('blue')
line(coords[i], coords[i - 1], coords[i - 2], coords[i - 3]);
}
stroke('black');
while(coords.length > trailLength){
coords.shift();
}
c1x = r1 * sin(a1); // c1x calculation
c1y = r1 * cos(a1); // c1y calculation
c2x = c1x + r2 * sin(a2) // c2x calculation
c2y = c1y + r2 * cos(a2) // c2y calculation
// Large Equation Definitions:
// Equation 1
let eq1 = -g * (2 * m1 + m2) * sin(a1);
let eq2 = m2 * g * sin(a1 - 2 * a2);
let eq3 = 2 * sin(a1 - a2) * m2;
let eq4 = (c2v * c2v * r2) + (c1v * c1v * r1 * cos(a1 - a2));
let den1 = r1 * (2 * m1 + m2 - m2 * cos(2 * a1 - 2 * a2));
let c1a = (eq1 - eq2 - eq3 * eq4) / den1;
// Equation 2
let eq5 = 2 * sin(a1 - a2);
let eq6 = c1v * c1v * r1 * (m1 + m2);
let eq7 = g * (m1 + m2) * cos(a1);
let eq8 = c2v * c2v * r2 * m2 * cos(a1 - a2);
let den2 = r2 * (2 * m1 + m2 - m2 * cos(2 * a1 - 2 * a2));
let c2a = (eq5 * (eq6 + eq7 + eq8)) / den2;
c1v += c1a;
c2v += c2a;
a2 += c2v;
a1 += c1v;
c1v *= dr
c2v *= dr
// Drawing to canvas:
strokeWeight(3);
line(0, 0, c1x, c1y); // Line 1
line(c1x, c1y, c2x, c2y) // Line 2
strokeWeight(2);
fill('black');
circle(0,0,20);
fill('white');
circle(c1x, c1y, m1); // Circle 1
circle(c2x, c2y, m2); // Circle 2
// Sliders and text:
translate(-windowWidth / 2, -windowHeight / 5);
strokeWeight(0)
fill('grey');
rect(0, 0, 300, 400);
fill('black');
textSize(20);
textStyle(BOLD);
text('Double Pendilum Simulator', 20, 30);
textSize(13);
textStyle(NORMAL);
text('R1 Slider :' + r1, 50, 60)
let val1 = slider1.value();
r1 = val1;
text('R2 Slider :' + r2, 50, 100)
let val2 = slider2.value();
r2 = val2;
text('M1 Slider :' + m1,50, 140)
let val3 = slider3.value();
m1 = val3;
text('M2 Slider :' + m2, 50, 180)
let val4 = slider4.value();
m2 = val4;
text('Gravity Slider :' + g, 50, 220)
let val5 = slider5.value();
g = val5;
text('Decay Rate :' + dr, 50, 260)
let val6 = slider6.value();
dr = val6;
text('Trail Length :' + trailLength, 50, 300)
let val7 = slider7.value();
trailLength = val7;
// Drawing circles and lines
translate(windowWidth / 2, windowHeight / 5);
strokeWeight(3);
line(0, 0, c1x, c1y); // Line 1
line(c1x, c1y, c2x, c2y) // Line 2
fill('black');
circle(0,0,20);
fill('white');
circle(c1x, c1y, m1); // Circle 1
circle(c2x, c2y, m2); // Circle 2
}
// Event Listener:
function windowResized() {
resizeCanvas(windowWidth, windowHeight);
}