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这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。
. k( `7 \; c" A# c- importPackage (java.lang);$ M2 c# T. d0 F
- importPackage (java.awt);
+ n! x5 r6 Q; ^ - . O5 p$ r: P, B& A3 w
- include(Resources.id("mtrsteamloco:library/code/face.js"));6 B) y2 |/ [( h, Y
- " h% D1 j* b, I* Z; O& Y9 N+ p' j
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' `/ S4 h2 Z& D0 G# N/ y
- + ?1 V. G: N. j% K H6 E
- function getW(str, font) {1 M& a4 Z% w7 g/ u* H1 _: F+ u- ? Z; e+ ^
- let frc = Resources.getFontRenderContext();) g3 Z5 Y: ]* W8 ^! r
- bounds = font.getStringBounds(str, frc);
+ u" r p, U: A! i - return Math.ceil(bounds.getWidth());
2 \% P& S% a7 l8 N7 { - }
6 B- H9 ?5 i8 P: M8 P# W8 H* |
Q$ M7 A4 d ]& B; P* K" c$ E. S/ }- da = (g) => {//底图绘制# y$ ]: E, j7 W1 q' a4 y. K
- g.setColor(Color.BLACK);
! j; {" ?0 _. t7 ^3 i - g.fillRect(0, 0, 400, 400);
4 Y6 J& l$ q% a! i' A+ f - }0 l4 g# X3 H! Z% R- \& K+ g
- ! [" G8 I: c+ W1 j* A
- db = (g) => {//上层绘制
# u0 ^) _; V8 ^ P4 A - g.setColor(Color.WHITE);
4 }/ F# \& n8 {' P3 f - g.fillRect(0, 0, 400, 400);
: C; J) v! t3 P- V1 |+ P* z) j2 f - g.setColor(Color.RED);
( g0 m0 ~% k) A# \8 K - g.setFont(font0);
, u9 P1 @! X- ~$ U; \ - let str = "晴纱是男娘";
7 C. S( c5 k5 W% i - let ww = 400;
. B# ~! Y" C& | c - let w = getW(str, font0);4 U0 c5 `$ ~! b- f+ }5 z
- g.drawString(str, ww / 2 - w / 2, 200);" V5 C& I0 Q- S1 Z5 }) A0 h
- }5 r1 x# s: _( z) W; R3 u& F2 W
1 F* n9 c( ]) V4 c7 t- Z9 v- const mat = new Matrices();$ n) F# [. }9 M1 e2 ?, J+ y
- mat.translate(0, 0.5, 0);
$ q) [7 h0 o' q! i/ ?$ e+ Y$ z
6 L) p# m7 i% ]" }/ W: j0 a0 j- function create(ctx, state, entity) {
! B% `* I5 Z4 a! S2 @ - let info = {
/ ?( I5 b# ]8 p; n$ f. {( ] - ctx: ctx,
. O0 I$ o: ~1 k" m0 o2 P. X3 H! S- q - isTrain: false,, Z" |5 T% u% R; H Q( U
- matrices: [mat],/ Z) k# v' Z8 A( Q! X) \% _# ^& g7 V
- texture: [400, 400],2 I1 Z2 U; A5 R) [+ I! P
- model: {
. r4 S, U$ ?* V - renderType: "light",! m' {, E9 E7 ~ i
- size: [1, 1],
6 I2 S. ]9 I0 E! W9 A& W - uvSize: [1, 1]
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- }- V8 [8 r6 J+ i" }
- let f = new Face(info);' B# A0 d! }( a2 ]$ e3 x7 f
- state.f = f;6 w( h8 t+ ]+ B" e) E- W' n
6 }1 y% [1 |9 i2 [9 t0 K- let t = f.texture;
& r# C1 J# `8 v8 g2 ] - let g = t.graphics;
0 y0 K- g# _$ m6 |; k - state.running = true;
. k- A, d9 I. F( a, o - let fps = 24;
. S' \$ }& o- M% Y: O - da(g);//绘制底图
. D/ D2 A7 \2 @# n% H! i# l - t.upload(); _" y4 [2 B" s" I2 U4 e% N
- let k = 0;
( T) f0 R* O4 B' p - let ti = Date.now();
, c% O6 r# I3 q - let rt = 0;, P( h3 w; m% ?; z/ m1 V
- smooth = (k, v) => {// 平滑变化! R& e. h! l/ h, i
- if (v > k) return k;
5 X( b2 L# O. ^/ c& R - if (k < 0) return 0;% V. m& o, U9 _3 h4 @" r p9 K2 V
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;" C* b# _' e4 X
- }1 q6 f8 ^, A8 O( b/ I q
- run = () => {// 新线程
9 c+ X/ n- _0 ~3 e$ { - let id = Thread.currentThread().getId();
* F. I& K/ v; d1 V7 T& D/ n - print("Thread start:" + id);
% Z* U& H; q/ D! w3 E - while (state.running) {; ]7 j* u; s: N+ j9 }4 |
- try {
5 W9 j8 X5 s" x5 I2 D* @/ D. w0 b - k += (Date.now() - ti) / 1000 * 0.2; b# V* I$ s* Q+ t+ n
- ti = Date.now();
5 }! s& ?. X# W2 e7 Z; y - if (k > 1.5) {) R r5 d! A& x" O
- k = 0;
( l& x, a: {: b f - }* X, Y" G8 V) D: k! w
- setComp(g, 1);
; O' y+ I9 `8 R4 C - da(g);
( i/ s- `- S+ a4 @ ?" L# Q - let kk = smooth(1, k);//平滑切换透明度
8 |; M, L! U0 a" v# P) @# \ - setComp(g, kk);
' i, m% l, p& R- C. F - db(g);
( X! L& g! n- p1 ^- a$ O1 m - t.upload();/ }3 \1 Z1 u. W2 M1 B
- ctx.setDebugInfo("rt" ,Date.now() - ti);
# a3 R5 `' X; Y$ p/ i! D" V" J* { - ctx.setDebugInfo("k", k);+ o, T. i- D V, F; a% ^
- ctx.setDebugInfo("sm", kk);
" m6 W; e/ b; q - rt = Date.now() - ti;
- E& g2 ?* y0 J; d$ p - Thread.sleep(ck(rt - 1000 / fps));
@2 N: I; |# N4 D - ctx.setDebugInfo("error", 0)
. S+ K' [. \/ p5 E! L - } catch (e) {
. M- }7 o6 [3 e2 l: q3 n# }. C - ctx.setDebugInfo("error", e);
: `" W5 A" y3 P - }
2 M: k; z5 v8 h2 S% K6 O - }
# j: u; { v2 i- U - print("Thread end:" + id);
' F; W+ O5 W9 a5 _* \+ R - }
' O# ^( y. I5 a0 v - let th = new Thread(run, "qiehuan");2 G* r$ o# T1 Y
- th.start();
7 Q: p& y4 J2 A# r - }2 a' j: l* A8 _* j/ N
: Q7 b+ X- k; d# {& W' d- function render(ctx, state, entity) {
6 y& v N: i. o7 X0 m3 Z g - state.f.tick();) l, x Q% q) a8 H- O }
- }% P. v8 z% C* \& B
- ) m3 e( N9 _$ z. v
- function dispose(ctx, state, entity) {
2 @- L C D; x: a4 f& Z - print("Dispose");
7 g2 x: S7 b. z% Q+ |$ t5 B {; [ - state.running = false;( ^( Y+ h/ K$ z; I' c
- state.f.close();! _2 E: Q# Q8 ]! g M0 t! y* e
- }! x, I9 Q3 V% Y
- 5 {/ @$ p( q5 h. ]5 M; e( o! R
- function setComp(g, value) {
. b! m- a a1 X& c3 ] - g.setComposite(AlphaComposite.SrcOver.derive(value));
* e. g2 k H+ t" m - }
复制代码
1 H& e' d1 ?* E- ~# ^9 b) b7 `% K2 e写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。, Q9 r3 ]- O# g/ }3 T2 l4 x
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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