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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。
& C9 }) S6 I+ c; w5 t) ]9 x- importPackage (java.lang);1 l% a/ a7 C8 ^7 ^ ]
- importPackage (java.awt);: b. a# @% A; s4 D
- 4 H1 v% d+ a& N+ Z
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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S4 r7 j1 e, }- ^* w2 u/ q- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 P- o: Z3 P' j) ^5 A2 A
5 F# K. [! W i* P5 I7 q% I- function getW(str, font) {8 R$ S* o: ^" O* u+ q j# b
- let frc = Resources.getFontRenderContext();4 z: W1 Y3 l' u6 o
- bounds = font.getStringBounds(str, frc);
, k6 ^: ]- j4 z1 q8 n! _ - return Math.ceil(bounds.getWidth());
9 e5 S) z; u1 _% P2 R - }
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/ p! s. ]* t8 X3 _& _% {4 r4 X. D- Q% @- da = (g) => {//底图绘制
# s2 d2 k$ b, A5 Z' g - g.setColor(Color.BLACK);+ ?3 m; n- l+ U: T* F: |/ \, t
- g.fillRect(0, 0, 400, 400);
/ T& D2 j& B1 b! `) N$ P - }
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* v0 \# Q7 g% K' f( E' a7 @- db = (g) => {//上层绘制
3 m Q9 }' `# |- h) A - g.setColor(Color.WHITE);0 G. o! y- P K" O, u! N: ~
- g.fillRect(0, 0, 400, 400);
, J2 d: t4 _, V4 c - g.setColor(Color.RED);
6 g. J5 v9 r4 G$ o - g.setFont(font0);
4 A, y. p% Q) ?' q- x. @0 X - let str = "晴纱是男娘";
; {+ A" e/ J; ^% | - let ww = 400;
. H$ Z9 N( u, m - let w = getW(str, font0);* J% S- I, e0 d+ S0 j* W4 V2 @0 |
- g.drawString(str, ww / 2 - w / 2, 200);
" U3 A8 k( Y) c- `% \2 ] - }
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4 p: L. w/ A b/ u% F2 i' A. g4 ^- const mat = new Matrices();8 c& H, R0 h0 L% O- K
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {; N/ q' {* M* L
- let info = {
( a! `' y" l# U2 N - ctx: ctx,$ d$ s% M0 F; @: W4 H X
- isTrain: false,9 f, _% m, q; N1 u. Y6 q; h
- matrices: [mat],
+ w: |) M+ u- d - texture: [400, 400],
) c2 Q) m; H, o+ a - model: {3 W7 m; L0 \7 g+ i3 v
- renderType: "light",
- N: H1 V' m, B* {+ q# G! {0 u; l: o$ f, b - size: [1, 1],
/ c' H5 j9 V2 y- [" X c7 @0 {2 Y2 S - uvSize: [1, 1]* v% U+ Q# B1 w# q" b9 O
- }/ T& H2 M' H4 F- ~ B
- }, ?1 R0 C6 ?, M( k( e% Y
- let f = new Face(info);" M8 b! {& \) g
- state.f = f;
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- let t = f.texture;
8 n% ^2 v8 ~5 m& K - let g = t.graphics;2 D- J `% W" \ \2 o' [. r
- state.running = true;$ O7 g. l5 D- T; [/ k# E0 v
- let fps = 24;
, G; D, S" B: R5 | - da(g);//绘制底图7 N& Q6 T. g( ]* w
- t.upload();3 b8 g% h! S$ D3 } M* p' Y: C
- let k = 0;
9 a. _, x. V' C/ T: r1 ]" m1 R; y - let ti = Date.now();
* R5 ^9 m# x8 Q1 h$ ?) Y - let rt = 0;) z2 x& e$ J1 | L
- smooth = (k, v) => {// 平滑变化
, v& f3 F* b/ T- x* P - if (v > k) return k;8 ]/ t- q# R: g4 F& K( v
- if (k < 0) return 0;
7 J2 \4 }9 M* V7 `. G2 [, ] - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# d) U% i8 F" r5 _5 P. T - }
; J3 Z3 W6 A+ M0 y; e2 d - run = () => {// 新线程6 R4 i$ J* C7 @" h6 }5 T" X
- let id = Thread.currentThread().getId();' R6 ~: u1 Z& \# i" r+ m
- print("Thread start:" + id);
" L5 d, {* }0 m5 z; j) p( d - while (state.running) {; I0 k p- w/ P$ ?3 ~
- try {
; s. r) v- x" }, a- M6 a& F - k += (Date.now() - ti) / 1000 * 0.2;
/ W& Z. ?6 {+ I# T; g: T - ti = Date.now();5 N# L1 Y7 }9 J; e
- if (k > 1.5) {
8 M# X) d; Q/ S; P+ h1 k3 \ - k = 0;
3 k- {7 C0 |% [ ]2 R& w9 ` - }: k, X9 p# M- T; Q. B" K
- setComp(g, 1);
# [9 a& ^, o) g - da(g);
" L s* U$ D% n3 A3 Y- g - let kk = smooth(1, k);//平滑切换透明度
; D; L9 [% J& d k0 U - setComp(g, kk);) O8 {9 ]( R- {4 |3 \3 I+ r
- db(g);
7 y2 J# I* K' L9 S6 c - t.upload();" n% e* L0 D9 ~- t g
- ctx.setDebugInfo("rt" ,Date.now() - ti);
/ s0 l; j* r3 X - ctx.setDebugInfo("k", k);7 Y" l# ~% r% Q9 ]& k; ~
- ctx.setDebugInfo("sm", kk); T \. x5 T9 V: p$ y1 K
- rt = Date.now() - ti;) v9 @6 [: r* _. [1 c8 R3 I
- Thread.sleep(ck(rt - 1000 / fps));
% a1 b" d- y# Q1 r7 b - ctx.setDebugInfo("error", 0)0 X$ J8 R9 n3 h, x% k" p+ Q. }$ ?
- } catch (e) {
: r& K2 y, a# }' @; D6 V - ctx.setDebugInfo("error", e);. `; W2 Q% n2 G1 O8 Y# g5 o1 m
- }' w! I' Q9 ~* {7 G; o1 V. ?0 @
- }
3 r5 @) Q; u5 D: \* o. r" \ - print("Thread end:" + id);/ U$ ^! J3 G3 g I
- }0 s% {' W6 h' f# H2 |) F
- let th = new Thread(run, "qiehuan");
& o: g$ i, s$ q, d% j. w - th.start();. l; E& y# F- G; {/ X# ^
- }
# D% }6 \! i* Z5 V+ A4 i
' E7 ?, F( L# r& }- function render(ctx, state, entity) {9 N3 N7 X5 q B; _4 O
- state.f.tick();5 k, i" f/ Y& y6 j5 c' v) _" {9 F. |
- }
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- function dispose(ctx, state, entity) {' x/ F& l+ C3 X+ I0 y
- print("Dispose");
- z6 u7 f( D/ X - state.running = false;; s/ d* g! e1 s2 w2 k5 H
- state.f.close();; {, l' T( m# b$ B9 h6 N* x2 H% q
- }
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9 s& P6 n* J( Z2 i- function setComp(g, value) {
. w9 t6 H4 z+ ? - g.setComposite(AlphaComposite.SrcOver.derive(value));. X% s- c9 o0 C" ~$ L4 L# K7 |$ b
- }
复制代码 % J2 @* w8 C O7 e. G! [
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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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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