nx_pendulum.nx

buildroot/runtime/nx_pendulum.nx

6238 B131 linesdepth 0pulls 0 transitivereach 1 importersview sourcekind librarytopic pendulum

docs dependencies structs consts functions

about

nx_pendulum.nx -- Simulates a nonlinear pendulum using integer arithmetic and symplectic integration for accurate physical behavior.

dependencies 0 imports · 1 importers

imports: none

imported by: nx_pendulum_gate.nx

structs

none

consts

2	const O_MAGIC_3141593: i64 = 3141593
3	const O_MAGIC_6283185: i64 = 6283185
4	const O_MAGIC_1570796: i64 = 1570796
5	const O_MAGIC_1047198: i64 = 1047198
6	const O_MAGIC_4096: i64 = 4096
15	const W: i64 = 256
16	const H: i64 = 256
17	const O_FB: i64 = 0
18	const O_TH: i64 = 524288 // theta (micro-rad, x1e6)
19	const O_OM: i64 = 524296 // omega (micro-rad / s)
20	const O_GLN: i64 = 524304 // restoring numerator = 980/L (g/L * dt * 1e5, g=9.8 dt=1ms)
21	const O_AMP: i64 = 524312 // initial amplitude (micro-rad)
22	const O_LIN: i64 = 524320 // 0 = true sin pendulum, 1 = linear approximation (for the liar-kill)
23	const O_STEP: i64 = 524328
24	const O_THEAD: i64 = 524336
25	const O_TCNT: i64 = 524344
26	const O_TR: i64 = 524352 // bob trail (display px,py)
27	const TRAILN: i64 = 120
28	const SC: i64 = 1000000 // micro-unit scale
29	const DT_DIV: i64 = 1000 // theta += omega/1000 (dt = 1ms)
30	const GL_DIV: i64 = 100000 // omega -= GLN*sin(theta)/1e5
31	const CX: i64 = 128
32	const PIVY: i64 = 40
33	const LPX: i64 = 155 // rod length in pixels
34	const STEPS_PER_TICK: i64 = 16

functions

36	func rgb(r: i64, g: i64, b: i64) -> i64 { return (r & 255) \| ((g & 255) << 8) \| ((b & 255) << 16) } called by 1: render_impl
37	func sin_fixed(Xin: i64) -> i64 called by 4: cos_fixed step_one_impl record_trail render_impl
49	func cos_fixed(X: i64) -> i64 { return sin_fixed(X+O_MAGIC_1570796) } called by 2: record_trail render_impl calls 1: sin_fixed
51	func putpx(base: i64, px: i64, py: i64, c: i64) -> i64 called by 3: disc line render_impl
55	func disc(base: i64, px: i64, py: i64, r: i64, c: i64) -> i64 called by 1: render_impl calls 1: putpx
62	func line(base: i64, x0: i64, y0: i64, x1: i64, y1: i64, c: i64) -> i64 called by 1: render_impl calls 1: putpx
71	func clear_fb(base: i64, c: i64) -> i64 { let fb: i64=(base+O_FB) as i64; var i: i64=0; while i<W*H { fb[i]=c; i=i+1 } return 0 } called by 1: render_impl
73	func init_impl(base: i64) -> i64 called by 3: tick_impl init main
84	func step_one_impl(base: i64) -> i64 called by 2: tick_impl measure_period calls 1: sin_fixed
94	func record_trail(base: i64) -> i64 called by 1: tick_impl calls 2: sin_fixed cos_fixed
103	func tick_impl(base: i64, cmd: i64) -> i64 called by 2: tick main calls 3: init_impl step_one_impl record_trail
110	func render_impl(base: i64) -> i64 called by 2: render main calls 7: clear_fb rgb sin_fixed cos_fixed putpx disc+1
125	func ww() -> i64 { return W } called by 1: main
126	func hh() -> i64 { return H } called by 1: main
127	func fb_off() -> i64 { return O_FB } called by 1: main
128	func init() -> i64 { return init_impl(0) } calls 1: init_impl
129	func tick(cmd: i64) -> i64 { return tick_impl(0, cmd) } calls 1: tick_impl
130	func render() -> i64 { return render_impl(0) } calls 1: render_impl
131	func mem_bytes() -> i64 { return O_TR + TRAILN28 + O_MAGIC_4096 }