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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。7 C, R/ t9 t# w/ X# }& r: ~/ [. w; K% m
- importPackage (java.lang);6 A1 g! M1 x# T/ m
- importPackage (java.awt);4 P4 S! u' f% d/ ^3 A* t9 Y
- & t9 ]$ }$ Q9 ~- V. \
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! `% Y% Q; @, o7 V( g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {, {% G4 c, ]! m/ M& Q* Z7 I/ ]
- let frc = Resources.getFontRenderContext();/ W% ^8 t. B2 f9 C
- bounds = font.getStringBounds(str, frc);: Q. t9 t+ J9 n' i+ _8 E
- return Math.ceil(bounds.getWidth());
3 D4 U# u; }' V/ Q# i - }
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0 f6 \. }2 L2 |; Y7 T. J- da = (g) => {//底图绘制; h, y& |( \/ { A' e
- g.setColor(Color.BLACK);5 D5 {: y/ o6 @, l! ~/ ]& }
- g.fillRect(0, 0, 400, 400);
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9 D5 p. h c5 ]$ U1 N, \- db = (g) => {//上层绘制) C/ s9 ]+ L- B. `
- g.setColor(Color.WHITE);0 I$ ~/ P( C3 L
- g.fillRect(0, 0, 400, 400);: a- h! J. y; l9 L8 P, ^6 g
- g.setColor(Color.RED);
& L3 x# ~( Q4 A! { - g.setFont(font0);
. O! `$ c1 h! Y - let str = "晴纱是男娘";3 N+ j" G9 J9 o+ H
- let ww = 400;+ P r: ?3 p; r9 E8 f6 `
- let w = getW(str, font0);
9 G/ G" @ }8 N' z# S" ? - g.drawString(str, ww / 2 - w / 2, 200);
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' b6 r+ a$ d- u3 K+ c2 ?: F- const mat = new Matrices();
6 a9 _8 {0 x" K) l - mat.translate(0, 0.5, 0);
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0 e9 g% J$ z, r3 q) `/ z$ q- function create(ctx, state, entity) {
* w% S4 D8 Y0 [+ J. S' f - let info = {! O+ F# s9 x5 w) H
- ctx: ctx,3 O0 O5 X; Y/ o1 l8 @0 z
- isTrain: false,' {! f+ j" M2 X8 f5 H4 f8 U
- matrices: [mat],' S1 A6 k5 \$ c7 J% {
- texture: [400, 400],
& }' r9 ]+ {0 J2 m' r* v" x - model: {
$ i7 m1 K* b3 c- Q - renderType: "light",
" [- M: k9 E3 L7 u" L - size: [1, 1],
, Z8 X9 F$ \$ x - uvSize: [1, 1]8 Y! x# T: R3 l& N0 j8 Q: K+ v
- }
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- let f = new Face(info);
% t- y& u/ a# \1 G) u ?# [: ~8 ] - state.f = f;
/ g# Q: c5 `+ Y3 d/ ` - # c: b8 A% C! T
- let t = f.texture;4 Y' {7 C6 x' N: E8 F3 H
- let g = t.graphics;
" b6 }3 N% ~2 q4 A5 S2 r+ C6 g - state.running = true;
: a# {9 r8 o" L0 M: U' }4 L - let fps = 24;
' q/ T, j7 D/ L. d+ X - da(g);//绘制底图
, A3 C% `" K. R6 M - t.upload();, l3 Q: {6 c$ J& q; w
- let k = 0;
6 H- _7 u/ k7 J! d) S" T - let ti = Date.now();( p! `( A+ W+ t0 A
- let rt = 0;
" v+ X$ k: T4 a7 L - smooth = (k, v) => {// 平滑变化9 O8 b) U( z8 K: a& w+ T% H
- if (v > k) return k;
( u9 B/ b" B- f2 L. z - if (k < 0) return 0;4 e. Q2 o) j4 m1 J! f
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 B0 s% l% P' f I- ^) D1 V# P - }
) m. N5 Z$ V. q* F0 W - run = () => {// 新线程
3 F! \( h+ T0 {/ y7 d5 ?4 f) }" b - let id = Thread.currentThread().getId();$ A% G" T3 Z: c# A
- print("Thread start:" + id);+ N/ G P# K- v, T" B8 B) k, n
- while (state.running) {
+ ?& \6 O# P# N4 k. A: ]8 H5 u' x - try {
) R N, Y& E& K - k += (Date.now() - ti) / 1000 * 0.2;+ d: ^9 O+ v: _) {9 d% y
- ti = Date.now();
- ^. U/ G I8 h- x' A - if (k > 1.5) {5 z* r3 g4 k. E* c/ U% O
- k = 0;" r: c! n1 I1 [' ?& J8 p# u3 B
- }* g7 W! F5 r7 h( S2 d
- setComp(g, 1);! ]' a9 L0 c' z, ~
- da(g);
6 h4 y6 |% a& I- n$ Y- k6 z B - let kk = smooth(1, k);//平滑切换透明度
2 z6 s% Q7 D9 q - setComp(g, kk);
5 e2 M7 v) l; X0 t$ i' r5 h" o - db(g);
4 a% ~1 h4 v( w+ l1 I - t.upload();
( z \' ?& g# E3 j% Q - ctx.setDebugInfo("rt" ,Date.now() - ti);
0 s0 v% N1 B) K- h; n h# G - ctx.setDebugInfo("k", k);6 q; Q, y4 Y" I
- ctx.setDebugInfo("sm", kk);
9 E. a" j/ t# F* @" [ - rt = Date.now() - ti;
. v* d" u; G# C: I6 n - Thread.sleep(ck(rt - 1000 / fps));- w3 S2 ]4 r6 W) F
- ctx.setDebugInfo("error", 0)9 X) R: o" Z1 U1 n- k, i( ?! [- p
- } catch (e) {
) c/ p2 K; ^- u - ctx.setDebugInfo("error", e);! M: Y$ C1 C2 c/ v x
- }
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- print("Thread end:" + id);, E1 W" |/ S5 J g- Q% d$ Y
- }
; F! o/ d1 m, W- n/ `$ M4 E: r2 |, F0 i - let th = new Thread(run, "qiehuan");
4 a. d& p% `9 j2 J2 Q) ~ - th.start();$ j5 s1 T8 P i- y
- } @& Q/ V( ]6 I) g9 N' }7 {
. Q+ d5 g6 y% [ u; z, @3 `' e- function render(ctx, state, entity) {, X4 f! y9 d: P7 F
- state.f.tick();
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- . T- g$ S* \( s' [1 r
- function dispose(ctx, state, entity) {
5 e: S" {4 p/ R/ _+ m0 h4 v - print("Dispose");
8 E0 N% G8 H4 }5 | - state.running = false;
9 B4 ^5 @+ m- r - state.f.close();
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- 5 X" O: {2 `6 p$ v3 J
- function setComp(g, value) {
9 e7 k# w% R: m/ ~, k4 q8 v - g.setComposite(AlphaComposite.SrcOver.derive(value));
2 N; D7 _$ C6 | - }
复制代码 ) p- j P+ [% r) Y9 _; E' e# `
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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" x1 C6 _0 O2 a5 Q1 C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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