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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。8 E% ^6 V5 a1 h: e( s' C
- importPackage (java.lang);* G: k+ D4 v/ E2 Y
- importPackage (java.awt);4 n+ H0 c) F1 b+ {$ u
* L0 ^# y* K- f! m- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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; d, w" i+ K1 D* Z7 A+ L- function getW(str, font) {
0 u( H2 t9 x5 W9 ~ - let frc = Resources.getFontRenderContext();; d1 Z# {$ n+ e. B d: r A* F6 d+ B
- bounds = font.getStringBounds(str, frc);
9 k8 A6 }+ e7 |6 \; J1 z - return Math.ceil(bounds.getWidth());
; k/ a2 x, Q) i- } - }
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$ Z& o7 Z6 E# l6 J6 q" c- da = (g) => {//底图绘制
5 V2 S) U. x# Q, |* {# s - g.setColor(Color.BLACK);: C1 l( w- X$ `9 F+ @8 p& Y
- g.fillRect(0, 0, 400, 400);5 e0 y6 Q9 r& Y4 {$ E4 F3 O
- }. X! h, D$ _9 p5 ~
- / U) k# ]- _+ U+ z) K b
- db = (g) => {//上层绘制$ e( [0 h/ b- D& E9 f3 U- y0 d
- g.setColor(Color.WHITE);
" z# V5 w% E) \0 L, T0 h+ {1 _ - g.fillRect(0, 0, 400, 400);* c0 X b5 U1 R6 h, z$ W% J
- g.setColor(Color.RED);) a6 i. I. b$ X% s
- g.setFont(font0);8 r! V9 W/ Y: ^6 @* z& k
- let str = "晴纱是男娘";/ a2 |% w7 Y& X- W( s
- let ww = 400;% R. v; r: X& e
- let w = getW(str, font0);
/ N. ?* Y0 n9 p% s4 `0 } - g.drawString(str, ww / 2 - w / 2, 200);8 o- z* c9 `0 T1 y* [* ^! h/ ]
- }
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- const mat = new Matrices();
: ` O7 ^0 |6 Q+ K - mat.translate(0, 0.5, 0);" f" k: M1 S- x9 ~& F
- : C0 I% \. _0 v$ U
- function create(ctx, state, entity) {) h5 d0 n0 g. \" y
- let info = {( C( C5 j* I& l5 i" J5 M
- ctx: ctx," ]& u1 c8 N" A9 b- X) `5 V
- isTrain: false,9 u( q$ C D6 _5 @9 A7 W; G
- matrices: [mat],/ N, R* b# l5 r
- texture: [400, 400],- c- x! y8 F6 m" z. s! I- h$ u3 D+ Q
- model: {7 v$ Y: [/ X! t7 w [. N
- renderType: "light",) |. u0 Q6 d; d: D+ p+ T
- size: [1, 1],: S: N7 m8 a/ b/ f6 V0 E
- uvSize: [1, 1]
0 ~: e2 M: W. W k2 n - }
, l! d; x; d* X - }
6 P1 ]7 r4 Q! w6 j* x0 Q# H - let f = new Face(info);2 d" V H' T+ H+ d; R
- state.f = f;
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- let t = f.texture;* g2 s9 l; E5 _
- let g = t.graphics;0 ^* e0 \* {5 ]! E; u6 A' S* s; d
- state.running = true;2 o* E0 s* t/ }
- let fps = 24;
3 \9 h$ U j! G6 p+ c' T. h - da(g);//绘制底图. ]( h2 ?+ v: W6 Z$ M. Y" l+ d! w
- t.upload();
" K# y/ L, B d' @9 k) D+ i$ t6 ` - let k = 0;. Y; L" D1 l [* _" i$ Z1 t
- let ti = Date.now();3 k- i6 Y3 n& M) m& D: ]1 F
- let rt = 0;
& \+ o2 C' Y! O4 M' c* X( E. x - smooth = (k, v) => {// 平滑变化. v# R3 d' G6 A9 U# w# t9 Y& X
- if (v > k) return k;; n5 E) _" Z0 H; c3 P+ i' m$ k
- if (k < 0) return 0;
9 Q7 Q5 ]1 _7 `8 L, K4 B - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ ^* C$ m7 m7 X# F/ G9 p
- }
. X* {: t5 _9 z* f! F2 A - run = () => {// 新线程
3 ^5 G# t5 a( r9 O - let id = Thread.currentThread().getId();8 J( R5 L& [5 y( `4 [ S/ K
- print("Thread start:" + id);8 J6 S- V/ v# J; Q. L3 r: p7 W
- while (state.running) {
2 F, k* I4 a8 i: f; q - try {
, W+ k( j2 Y. C% X* p& D/ p2 f - k += (Date.now() - ti) / 1000 * 0.2;2 F9 E9 x. t7 V' k
- ti = Date.now();
, k- P! c- k. C - if (k > 1.5) { u V3 v# b3 ], |
- k = 0;
) Q" p+ _+ `8 {7 }5 G* n6 {# j - }
& b5 `& z m+ w4 Z - setComp(g, 1);
; X# F; v; o# w4 t1 V/ J - da(g);
% K- r: n. v1 {% R6 @" B7 i - let kk = smooth(1, k);//平滑切换透明度- s9 q8 v0 s/ M- d( P- ]" j
- setComp(g, kk); C& u2 d3 T+ h5 B
- db(g);
" ^) P1 S- v9 o# P% P& b$ i - t.upload();' j/ i( i7 G( Q: h- @5 H
- ctx.setDebugInfo("rt" ,Date.now() - ti);' v- R3 i- Q1 h* f: m1 f ~$ O
- ctx.setDebugInfo("k", k);
8 ^2 i9 b5 c6 D" q/ N. z2 J - ctx.setDebugInfo("sm", kk);! n; x) `+ |. ]9 D+ w" T
- rt = Date.now() - ti;
/ Q4 |: S& m K$ y - Thread.sleep(ck(rt - 1000 / fps));
" R4 a' R' Y! X% @$ \& J' z. \ - ctx.setDebugInfo("error", 0)
) D" [ r( ~# W - } catch (e) {
, H- Q- O r8 n2 s; a$ _: D1 E( K$ ] - ctx.setDebugInfo("error", e);
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- }
, N; m* k$ \5 U5 M3 f8 n9 } - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");. L9 E% J' P& j; j: ^
- th.start();
. M2 e+ ~- j8 L' O; Z( w( f- P - }
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% h2 k6 b& G P7 t* k7 U5 I- function render(ctx, state, entity) {8 d( k3 S( j3 h6 F0 Z' O
- state.f.tick();
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- - D$ Q; D z! |6 \, _
- function dispose(ctx, state, entity) {
a+ h- S3 ^" n D" f0 K* V2 N# v - print("Dispose");/ R, W% A! g+ o6 l: z4 {
- state.running = false;/ D, P, ]* l5 y- B
- state.f.close();' `) d X8 b7 {$ K9 n) ^- s: S/ u
- }6 w; W8 T+ ]. `+ U. D {6 C
- * i3 M2 L, L. g/ f9 @; T
- function setComp(g, value) {: l* C' P8 V% ^/ p+ S% Z L6 j
- g.setComposite(AlphaComposite.SrcOver.derive(value));
$ p9 c% K% \3 d+ c0 W# y T - }
复制代码 . h- v: G/ V8 s% Q% C0 D
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。8 x; M+ M. c$ r- \: O K2 p; h
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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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