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* i2 Y9 @3 o- g, C, P! P2 ^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。" A6 w6 |8 O" o, j
- importPackage (java.lang);
4 ~0 Y7 i0 h3 e' B - importPackage (java.awt);% ~' g8 L, Z0 B/ E8 G
6 `$ V+ \$ g; N$ v& l, r, Q- include(Resources.id("mtrsteamloco:library/code/face.js"));) a' C% e& t- e) r2 k! b
# u- l3 h+ A; {4 W% w- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
6 Y5 g7 K, N4 U3 \8 H& p - let frc = Resources.getFontRenderContext();
. n% R! |! f; p" p4 Y - bounds = font.getStringBounds(str, frc);1 \# x. T' ~4 ]0 e4 o
- return Math.ceil(bounds.getWidth());+ y; p& ^" V7 j
- }
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8 j0 C' ], A' L, V6 H. Y, D- da = (g) => {//底图绘制
/ t; {1 ]6 z. k/ T5 R! ?" i - g.setColor(Color.BLACK);
5 g4 ~( k% M% j3 @ - g.fillRect(0, 0, 400, 400);
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- 0 l9 x! _( [# s! } o" ~
- db = (g) => {//上层绘制; G1 V' L% F5 c2 D. j4 _
- g.setColor(Color.WHITE);6 H' x3 u' B$ |" F: t4 w5 o# Z
- g.fillRect(0, 0, 400, 400);
8 C3 y; \$ E3 W" {) _ - g.setColor(Color.RED);
" K3 p; x* {/ g' Y4 c1 y- H - g.setFont(font0);2 ~3 ~) O, ^. B) D7 U4 D0 N
- let str = "晴纱是男娘";
6 t9 ?. V" r% v - let ww = 400;1 T6 I) f! S8 k7 j" a# Q
- let w = getW(str, font0);
% L; N Q+ P" m- A" E# G' { - g.drawString(str, ww / 2 - w / 2, 200);: |5 w# K$ X% E
- }
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$ \, B1 I& J1 H/ S: ?- const mat = new Matrices();
2 j( }, i8 c% i5 k! H. \ - mat.translate(0, 0.5, 0);
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, R) ?6 B: C& K- function create(ctx, state, entity) {1 H$ z7 |- f& b& I+ P1 {
- let info = {
8 v% ]1 H H4 ^- D3 A - ctx: ctx,
3 K3 c" I$ a' L0 j- x - isTrain: false,
! |7 E/ J8 [) }4 S" ^" [ - matrices: [mat],
$ a, @. x! h) ]1 }+ F! M$ T4 E - texture: [400, 400],
1 H% n4 e. ]: s- c* E- {9 |% ] - model: {" Z5 N/ p9 ?0 v' D* u; p
- renderType: "light",' u# F# F7 X6 A
- size: [1, 1],
$ G2 e* U" u2 d# ?9 }+ o& |, Y - uvSize: [1, 1]
: t/ H! _6 ]3 l) R! q$ Y6 h0 D. _ - }
/ K4 w( f3 s y q - }
) ]1 O8 {) |! b8 f# c - let f = new Face(info);% t9 ]6 {; w, }/ ]
- state.f = f;
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- let t = f.texture;
/ b& ]$ }. a9 s: A( D( ?1 ] - let g = t.graphics;' m% T6 ]2 f9 o4 \" x4 B. v) J
- state.running = true;" ^1 Y3 ~' z! Q/ T4 R
- let fps = 24;
O7 {& h9 k$ J* y, b+ i - da(g);//绘制底图
/ S* F: W9 ^ e" `% ] - t.upload();- S6 u" `7 G- ]+ g6 l5 @
- let k = 0;
N! \, u9 B. e$ w( ] - let ti = Date.now();
4 ~/ Y3 Z/ Z- A* [) t9 M0 E( H - let rt = 0;" {$ f/ B& L7 q- k0 [1 Z! Q
- smooth = (k, v) => {// 平滑变化
% M! d) a+ t" j% K; w, C6 L - if (v > k) return k;
3 Y& i$ s9 p& X3 ]# g - if (k < 0) return 0;1 }' r: I( N. R* s4 L+ J3 b# ^. Q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;+ C. R: e' K+ y' x
- }
- q# k( k0 H" P2 C2 w+ t8 |2 M' q/ C - run = () => {// 新线程
6 ~' j+ w! k( }5 ]2 }6 R* u - let id = Thread.currentThread().getId();! x* w$ g5 i: c9 G/ K" V7 w
- print("Thread start:" + id);
6 F+ c+ l; F) B" a0 C* V - while (state.running) {
8 O8 R4 H1 ~4 E4 m - try {
% Z4 w9 P E6 p9 ~" O6 t - k += (Date.now() - ti) / 1000 * 0.2;
" o% x; Y/ n. \$ J- h% L) q0 t - ti = Date.now();
. {. e* p0 x3 Z3 V' A5 K* q6 ]! g - if (k > 1.5) {( Y& `: }, C2 c! n
- k = 0;
/ c( r! A9 X5 ~5 l% s _ - }
3 ^# S9 _5 J8 F. n3 v: A# c4 B* t - setComp(g, 1);
; s. Z6 N9 s, k7 p2 I8 ?: | - da(g);
7 e3 Z6 `& d+ g* h' ] - let kk = smooth(1, k);//平滑切换透明度6 b6 H7 ~& _" r4 c- @, Y+ e0 U. w
- setComp(g, kk);$ Y+ C+ A5 X) ^3 H, y- X
- db(g);9 S: |. L- E& d3 u: z
- t.upload();
) {" R5 \! L, V, G% R/ T% g: { - ctx.setDebugInfo("rt" ,Date.now() - ti);: i3 A! p0 b, X& z' ~
- ctx.setDebugInfo("k", k);& m o5 g- `8 N
- ctx.setDebugInfo("sm", kk); S" n" d1 s9 r: i- d0 i
- rt = Date.now() - ti;5 A# s+ U m Z' C) A! s
- Thread.sleep(ck(rt - 1000 / fps));
) S* w, P* A% D$ C - ctx.setDebugInfo("error", 0)" \5 ` G: F9 ~
- } catch (e) {
) Y+ ^( s+ N/ e* z: j/ o8 i - ctx.setDebugInfo("error", e);0 \9 H' b" P- h" L$ F# X: {2 z& `
- }+ @! k' ?7 I/ T2 X. r/ A
- }
3 X7 x/ d( A! V! l+ [ - print("Thread end:" + id);
- q9 R R& x* |! c0 L C - }
# J5 \9 G: @7 K; Y4 }$ ` - let th = new Thread(run, "qiehuan");
# J7 G8 h6 V2 R+ m \; F. e4 b - th.start(); p2 K. u5 g- s. x: Q- p
- }
- k* m' S K& p \) f
3 z% y: M3 V F4 J- function render(ctx, state, entity) {4 T( T6 ?1 \) u& R) ?
- state.f.tick();' P; z. Q- t" U$ q6 X! V
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- 6 ]2 `- w6 \9 O
- function dispose(ctx, state, entity) {0 J, L3 w; B: B: }3 k2 X
- print("Dispose");
5 ~' [5 G2 b9 F8 U( G - state.running = false;
: W& h7 u; U9 T3 {. Z4 v* u - state.f.close();
* Y4 _( Z9 V1 L( \3 e8 M1 I - }
$ n. |: j" n/ ?$ ]4 N% J$ D# |9 \# { - * T8 |, G8 f l) K# I* P( _* @
- function setComp(g, value) {
$ Y* p$ A& c6 I y4 M$ s - g.setComposite(AlphaComposite.SrcOver.derive(value));( D. b. {; M* W9 x1 O; q5 R' c* X7 b
- }
复制代码 . K0 f9 P& C9 K
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。+ c- j( m0 N- G8 |; X% [ X4 N9 @
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) i+ s% J8 f9 B0 i5 z! o0 L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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