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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。
1 g: ^: i+ i8 A; |* A- importPackage (java.lang);, s( E+ m8 ?1 k$ A/ F
- importPackage (java.awt);0 e* R3 V6 b( M* _9 `5 Y) |
- % M3 L, f& d7 k- P' B" ]' K* t
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* |& ?6 L& ^6 U& S$ H, C9 B
3 S. D: g0 I+ A2 n; b6 W @. Z- function getW(str, font) {
6 Q8 p3 U! F! J3 W2 i - let frc = Resources.getFontRenderContext();0 f; D% ]$ S/ n# K" m
- bounds = font.getStringBounds(str, frc);+ ]+ `/ n5 ^: r0 \" j3 I2 _# h
- return Math.ceil(bounds.getWidth());
; A' x# w; s9 w' p0 h - }
* b- f+ E6 Y H6 s - 1 K" ]5 Q- h& S/ Y& D4 b# @8 d
- da = (g) => {//底图绘制( H6 G7 q. l) _2 Z2 P3 K
- g.setColor(Color.BLACK);1 J2 R( q4 N) \: r M
- g.fillRect(0, 0, 400, 400);
% y$ H: I. o+ ? - }- x; i7 s! r! Z9 r! A
- ) C4 I7 C( q: C, }
- db = (g) => {//上层绘制, `4 O3 z; b! f5 n! X
- g.setColor(Color.WHITE);" \. O+ _9 v4 O
- g.fillRect(0, 0, 400, 400);7 `' N' h8 s* ~; ? `
- g.setColor(Color.RED);
) s5 @" Y4 U# D$ j - g.setFont(font0);
& ]/ ?3 A! L$ }& ] - let str = "晴纱是男娘";* ^- j" A {+ g# n+ K6 C* p
- let ww = 400;' @% I+ y" v5 C0 H2 U, s! P
- let w = getW(str, font0);
$ f3 }( S9 K+ k5 L) F& {+ J4 U% ?% \8 o - g.drawString(str, ww / 2 - w / 2, 200);0 r- h- Y7 h9 P/ `# \' T2 k& E( `
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2 s1 }" k/ A8 U, H$ q( a4 [, {- const mat = new Matrices();
! p$ o3 J- _- w6 t - mat.translate(0, 0.5, 0);" q. L; V( L' ^4 Y, |- {
8 [0 M9 [5 L4 {. c# t9 a- function create(ctx, state, entity) {
4 N0 ~- Q8 w- B, i2 u& E - let info = {
$ A" V1 @& {3 c/ E1 @! y; V6 U - ctx: ctx,
8 `- e9 {+ Y& c( O, D - isTrain: false,
' u. P3 J) r/ p% {1 j - matrices: [mat]," n6 Q. K; z6 V! A+ ^9 M; r
- texture: [400, 400],4 ~5 N& }, ]* v# G/ h) Y4 z8 |! H
- model: {
b4 P0 C: L2 L - renderType: "light",
9 H* Q3 _. Y! m. V8 r" T - size: [1, 1],
5 ~1 E& t( o+ b$ j& l0 H; P( Z, w0 @ - uvSize: [1, 1]. H, u! |% z9 c' |6 i9 f) v
- }/ Y' X0 G& N8 K( y2 H/ }
- }
2 `% J; d0 N4 t: u. c9 ] - let f = new Face(info);
7 h. Q/ Q7 J6 V1 z: x - state.f = f;
. s: R, P% n3 K1 Q5 ]
+ t$ O" J7 o* z+ T; I- let t = f.texture;
& L' R2 \! N4 `6 v/ k5 r - let g = t.graphics;% S8 L/ ^1 F/ _& z0 j3 `
- state.running = true;+ `( }- o8 [# y, ]1 y" J( k' O
- let fps = 24;2 e/ X' m9 E- l# d0 H
- da(g);//绘制底图
; X3 k2 n; b0 T! k& R' y& B; w7 [ - t.upload();
/ _& d6 i1 H' B- e' U& M2 s# D - let k = 0;+ J; W8 H. Z' {# B$ z6 m, ~+ I9 m4 m' r
- let ti = Date.now();
' n# T% b" r. A1 j: ?2 @, z - let rt = 0;
5 ~+ \/ l/ { a2 D- t - smooth = (k, v) => {// 平滑变化
) q' f. w3 P4 I% Z - if (v > k) return k;
, l$ E8 g& _" V7 L, B( g - if (k < 0) return 0;
7 f& j" P! N3 m: p& v7 A - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% s X6 O5 F3 k1 @ - }
z: O P8 z' s. ~9 T; { - run = () => {// 新线程
3 M, z( a* ^" B$ ] - let id = Thread.currentThread().getId();
/ [1 M0 x7 g q$ V9 O2 O6 t, i - print("Thread start:" + id);
/ ^4 ~' I" ^3 w1 b7 K2 M - while (state.running) {
/ k" R! q$ J0 V - try {
2 s* l+ s0 u5 |% v% X: g - k += (Date.now() - ti) / 1000 * 0.2;
. R3 r% h; W/ f - ti = Date.now();
9 }1 g4 e% M6 i - if (k > 1.5) {$ \, y+ N+ e. F: B3 U( b& b
- k = 0;
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- setComp(g, 1);1 p7 z! [1 v+ k @: s
- da(g);8 [; `6 K$ J5 ^% {# X( `3 [2 n
- let kk = smooth(1, k);//平滑切换透明度
3 p" Z0 q( e, S: @ - setComp(g, kk);' y Z# e6 Q6 I2 w6 \" z
- db(g);! y) ^8 b4 l# f2 |# ]* [
- t.upload();
3 ]: T, I0 m$ S' q - ctx.setDebugInfo("rt" ,Date.now() - ti);
$ l/ R5 w) u S - ctx.setDebugInfo("k", k);
( o0 R) @6 n' X& Q. p - ctx.setDebugInfo("sm", kk);
" P- A" X$ i8 u' Y9 L- X: C - rt = Date.now() - ti;
& z3 [; p; t; a, p+ V; T s. g$ o - Thread.sleep(ck(rt - 1000 / fps));
# p, M( {# P7 e" U2 X - ctx.setDebugInfo("error", 0)# E6 V, r ]( g7 N: H( X3 Q
- } catch (e) {
, v6 a- ~: E1 t+ v - ctx.setDebugInfo("error", e);9 n! o, L+ O2 D1 l" E
- }
1 c9 ^- @2 X3 v7 j - }
& S; @8 G$ h8 Q1 f! M2 B - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
8 A5 v2 E0 `+ j" Y - th.start();
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- 1 Y% o2 J" @, ?! n. n
- function render(ctx, state, entity) {
: {3 E: ~9 c: _9 u+ s6 Y. ^' g - state.f.tick();
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- & I" Z. Z; R/ C
- function dispose(ctx, state, entity) {0 R( C1 I6 {8 V5 c( y( |' z
- print("Dispose");- ?* z2 f) J& \- h2 ~8 {* i
- state.running = false;
& c% A8 t/ l: T - state.f.close();- U D0 p# s" v( x; ?% o4 k! A/ {
- }6 I, B0 I- D X6 N1 V" G
: R# U9 e$ g) B3 O1 u- function setComp(g, value) {
; \+ H2 l% a9 d' \ - g.setComposite(AlphaComposite.SrcOver.derive(value));. m2 }1 j. o# y, r+ e q' l9 G
- }
复制代码 - ?4 v5 U5 w8 ^! N
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。
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C, v3 k/ a% b顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* Q1 S* C" r$ ~! ^* m) o
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