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, z: x4 l" f* E4 ~4 g o" Q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。
' e; D, J7 S: X+ y0 z5 e- importPackage (java.lang); i2 g5 d, K( Y+ e2 E8 D- _# U
- importPackage (java.awt);
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`" k$ ~1 D; P7 a- p- include(Resources.id("mtrsteamloco:library/code/face.js"));3 ^1 ^6 f f8 n$ F6 U y
0 {0 m% {. Y" j$ Q _/ }2 z- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 _# P; G! g [, y% y# f
- , h% s2 ^* X R8 G2 ~! r
- function getW(str, font) {
' K5 Z8 j6 b* {! E. H+ ^7 | - let frc = Resources.getFontRenderContext();
$ m, a( x- R2 X9 _3 G - bounds = font.getStringBounds(str, frc);
( Q5 c% k3 H9 Z% M6 p! U - return Math.ceil(bounds.getWidth());$ I1 `' h/ w* p G9 n* e. k' p5 |
- }
% z9 H8 | d! c* T D7 S! c - & U" \* k) M! R# u9 B9 C
- da = (g) => {//底图绘制$ X+ x$ i1 v; j/ r9 ]( u/ ~
- g.setColor(Color.BLACK);
: K4 f0 r2 b4 o - g.fillRect(0, 0, 400, 400);
/ t. a/ m# S/ Y* |% h/ n - }, w. t6 X9 N# @) y h
- 9 T" j D7 c/ @* q; Q
- db = (g) => {//上层绘制4 K' _% `( {8 w8 N2 ]$ B
- g.setColor(Color.WHITE);
, c5 P4 s3 D4 z" B4 R* e - g.fillRect(0, 0, 400, 400);
* y' u" H. f' L! U8 _% O3 g( C - g.setColor(Color.RED);
; V: s9 G' U* c3 \9 i# ~/ ] w5 ^ - g.setFont(font0);
4 i. ^, x% j7 S5 o$ Q - let str = "晴纱是男娘";
% u4 X7 _4 k$ Y( j9 Z$ | - let ww = 400;
! l( v0 A6 ?2 K3 @6 ]9 \ - let w = getW(str, font0);
6 K+ Q" P" P9 U( G; t - g.drawString(str, ww / 2 - w / 2, 200);7 y1 f' P# v8 f1 S
- }
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- const mat = new Matrices();
3 i% L) O' `' I' |5 @" @5 o$ [: D - mat.translate(0, 0.5, 0);6 d I* L D& w9 y# P: M
/ P; Z- z( ?# D: o- function create(ctx, state, entity) {/ N) n. r* s$ g
- let info = {, t* j( o2 a0 O* i; N, j% ]% L
- ctx: ctx,# q8 t; w6 L! H v" K
- isTrain: false,
& y) k. F3 b: M0 W - matrices: [mat],
! \3 }/ e! N! I6 y0 {1 B- \5 G - texture: [400, 400],
y, @& X. `5 x Y - model: {
* @% ~ p, `! W) G, G - renderType: "light",: A" ]# s7 }- M' D7 C1 I
- size: [1, 1],
# [0 h4 r9 V: G - uvSize: [1, 1]9 m) O; q1 K! A# X$ g
- }
) A$ E! `( R. [% M3 F - }
2 U6 S# E5 h a+ Z8 Z1 e5 W4 [( t5 C - let f = new Face(info); k3 N( `# J; r$ X0 G" z/ H( }
- state.f = f;9 r, v# N* H* T4 }- z* _9 n
- 4 j5 C; H3 O0 W
- let t = f.texture;' r. h5 X4 k U7 b$ r& p. {
- let g = t.graphics;: u' x5 S4 S7 [) J+ E
- state.running = true;
$ W5 W1 P$ s w - let fps = 24;6 K/ R/ s1 r5 t! B
- da(g);//绘制底图
; {% z: Z/ H) ^* ~ - t.upload();8 }. P' T. Y: J4 M
- let k = 0;
) V9 x3 T( B+ Q& @% b - let ti = Date.now();9 {# ]7 v4 D' p
- let rt = 0;
* ]$ |, `3 d: f( }" b - smooth = (k, v) => {// 平滑变化3 K$ t0 b" y' q; y' u
- if (v > k) return k;
4 s8 I* B3 Z8 P7 S/ v' G6 k. o - if (k < 0) return 0;: u/ v1 A# L+ c9 ?5 o
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
/ j8 r: o+ E& L7 M - }% F! Z( O# o+ K) u( h3 T
- run = () => {// 新线程& L9 Q, s# X6 d
- let id = Thread.currentThread().getId();. `8 h1 D" L) _8 S' }; v
- print("Thread start:" + id);; E% g% Y. O( \$ P1 ?' `, Z( |
- while (state.running) {' t6 @. v6 Y" }$ @8 ]$ N9 C
- try {0 t3 q. |% c7 o
- k += (Date.now() - ti) / 1000 * 0.2;" Y& {/ G% B6 h# r) K- c
- ti = Date.now();' Y/ H/ ^* Q: h2 o
- if (k > 1.5) {" g( T7 L2 b+ M/ P$ s
- k = 0;
4 a c! \+ t1 D1 O! Y5 M: U - }; ?9 J6 c+ M; ^8 k+ Z
- setComp(g, 1);
* v# ]9 o6 c! x. r$ p - da(g);, Q! k8 t* ]( G
- let kk = smooth(1, k);//平滑切换透明度
3 w/ c" u7 H6 ] - setComp(g, kk);2 u) G" ]0 F+ w( |* w* I
- db(g);4 y8 e4 x' S% i6 b4 j8 @! B
- t.upload();
0 v5 j6 I: m$ u - ctx.setDebugInfo("rt" ,Date.now() - ti);
z+ @; y; e) D/ ?7 t& V. B - ctx.setDebugInfo("k", k);* Q* W$ U5 e3 `7 n+ N) D C
- ctx.setDebugInfo("sm", kk);' @; u3 p6 {3 @& [2 n1 f: D
- rt = Date.now() - ti;
1 \- k: C Q0 b5 E - Thread.sleep(ck(rt - 1000 / fps));
$ @& c" f F9 ^$ d7 P* V2 N6 O - ctx.setDebugInfo("error", 0)
# `: g, p: d% B - } catch (e) {9 i9 U- @+ c" P" Q2 b3 v
- ctx.setDebugInfo("error", e);
+ ~1 n2 ~- n0 X" K* s - }
. i u( ~8 }9 l5 }* S* Y( W - }
( T. g( M5 ]" T - print("Thread end:" + id);& h \+ k* @2 ^5 K! E9 a% w
- }
5 k/ w& F4 y. f - let th = new Thread(run, "qiehuan");6 {/ k. n- t7 h
- th.start();
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2 O: k8 k9 `+ r- U4 _- function render(ctx, state, entity) {9 L8 Y# o2 ~9 ^5 {
- state.f.tick();5 [2 \; V# |& H
- }1 ?2 X) m9 P( k2 T7 q6 J. Q
2 N2 n* i" t) W; t- function dispose(ctx, state, entity) {
' D2 b9 W5 h4 n& P+ ~, h. f - print("Dispose");
3 W4 S/ B& T0 e6 s+ h% \ - state.running = false;! f4 M$ p: z% W5 r! m, Z
- state.f.close();
3 K B* Y6 v& G$ t4 A - }' u) A9 H% ~: M$ U, b; `( F
- 6 R& Z5 ?8 o6 ~' c1 w7 b
- function setComp(g, value) {
- F f; I7 o- S' p% ?" j8 R - g.setComposite(AlphaComposite.SrcOver.derive(value));) J, x- Q; m# D3 h; n
- }
复制代码 \8 i g2 G+ \( \. @) U$ H
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。% z) p0 _ q8 V/ A M
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{% V9 V8 G# ^( @# R. U+ A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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