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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。- ~5 I: F, Z0 n$ J4 M
- importPackage (java.lang);
! w) P; \' H. v8 O, d - importPackage (java.awt);
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b9 Q& w# I, y7 e4 g. @- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 v% C- ]' a/ S5 ?' Q) t8 `$ n$ Z" F
- 2 P+ E' Z3 L5 `
- function getW(str, font) {
5 n+ A4 C" G6 L2 H - let frc = Resources.getFontRenderContext();, F' [/ M( Z: u" y, ^
- bounds = font.getStringBounds(str, frc);7 P5 f* V0 H' B& W. R
- return Math.ceil(bounds.getWidth());
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' k( h. \! x+ q( [* L- da = (g) => {//底图绘制
3 ^8 D- J- C' G# @ - g.setColor(Color.BLACK);
5 o! _4 _5 \7 I; H - g.fillRect(0, 0, 400, 400);9 O5 ?/ d- k1 ^2 l: W K
- }" P' K. ?2 x, ^" Z! I0 l* u; X
- . d. }/ d P& X+ J
- db = (g) => {//上层绘制
% Z' q2 y V( d) U: _* c - g.setColor(Color.WHITE);$ z* B. {9 Z5 N" \0 Q2 m
- g.fillRect(0, 0, 400, 400);
3 Y! N3 a8 y3 L+ g# h% U - g.setColor(Color.RED);% k3 A {- o4 V( T, l
- g.setFont(font0);
; v& k* k: X2 q) p: v3 U {0 S - let str = "晴纱是男娘";2 X5 [3 c7 ^, E' K( g; P9 Q7 S' M: |, k
- let ww = 400;/ Y' v+ `4 X# U2 c2 G8 R5 Y
- let w = getW(str, font0);
G# d2 Z8 H: ?6 J1 T - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
: ?: d( }4 {" m! h* h- r - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
* S; ^# z9 [9 `' \* v+ k - let info = {0 |; ~0 X/ W5 }* f
- ctx: ctx," b& f+ f3 u/ n4 ?
- isTrain: false," h& M+ B: s1 R! Z3 E/ J6 Y# ?
- matrices: [mat],) P5 z( o/ f1 Y8 p7 _7 l
- texture: [400, 400],8 Y: }% N* M3 {9 G$ u8 C3 }
- model: {
3 F3 P: v% q9 s1 I! T! l# ^ - renderType: "light",! _3 r2 ?; A' n# x9 E" d
- size: [1, 1],
1 X- [5 ]) _5 i) w4 o/ e/ y - uvSize: [1, 1]
; b* y+ J. V) _ - }
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- let f = new Face(info);- A8 @1 x# X" z/ H* \+ \
- state.f = f;$ T1 I E2 X: B o" y* E& l
- . R2 K0 `$ X, u0 b7 C
- let t = f.texture;
G( [2 y2 s, A6 G" n9 ] - let g = t.graphics;
! l) T. E) x# ?, v8 @ - state.running = true;9 Y' X, a! G+ J" H
- let fps = 24;
/ O8 X& y1 Y2 a8 f; o K - da(g);//绘制底图2 b$ J+ y4 G3 e/ s5 ~8 N }
- t.upload();
% G$ q! y0 J8 i2 N! {/ G1 o - let k = 0;
* H+ K, I$ B1 Q0 p4 c' _ - let ti = Date.now();& B( k/ o, U1 I* R
- let rt = 0;" c. C9 g2 Q3 Z, X) x+ p
- smooth = (k, v) => {// 平滑变化7 o' r0 `" y) H+ x/ V8 }. k* }* a
- if (v > k) return k;/ P: a7 y; C/ y6 n" A7 Q
- if (k < 0) return 0;
[- @& [5 @3 N/ X! a O: l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# w, n7 G3 D3 t0 ^
- }
, `( T( N5 d$ r7 p - run = () => {// 新线程
* k0 A( l7 v0 B" \ - let id = Thread.currentThread().getId();0 u$ L9 ^8 e% a" L6 l
- print("Thread start:" + id);! i3 q3 y( R a6 F9 \- d
- while (state.running) {
- V, y' T" S9 x: K+ R4 P% P - try {+ I4 q; x* b/ v8 _0 X9 m
- k += (Date.now() - ti) / 1000 * 0.2;6 P- R# O3 w# t- [# T
- ti = Date.now();
; d2 W. e8 v! e, J( | - if (k > 1.5) {
6 h' S2 D& B) o1 h& @ - k = 0;& F9 \: ]+ I( n$ P
- }
. s) a& I5 k2 M3 o4 n/ e - setComp(g, 1);' C# _1 a- U( j/ ]8 Z
- da(g);# R7 I# ]' c+ `7 h! c
- let kk = smooth(1, k);//平滑切换透明度
+ n: d2 e0 `; y# l A" F6 G - setComp(g, kk);
4 ?0 a7 j; ?9 p4 x+ v/ U - db(g);: u& A) |8 R9 x2 E% D
- t.upload();
' Q$ N6 y) ^1 W1 k8 Q6 H - ctx.setDebugInfo("rt" ,Date.now() - ti);
$ Q. X( H! K r& v6 N - ctx.setDebugInfo("k", k);; X1 @- e, Z* U& g. E& ^; a
- ctx.setDebugInfo("sm", kk);
- C7 ?& w. i4 l1 \5 `; F; a# n/ f - rt = Date.now() - ti;
; Y9 c, [. @' G7 w; e - Thread.sleep(ck(rt - 1000 / fps)); U( l" z* h/ ~; O
- ctx.setDebugInfo("error", 0)6 P$ Q# c3 m0 J' W6 ~
- } catch (e) {
& T7 h, d9 @2 @1 `7 h - ctx.setDebugInfo("error", e);
0 X L5 F( W/ }( Z& Q4 B - }
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- print("Thread end:" + id);
p! }( n6 w( L: j0 }* ` n1 y( k - }
) k1 B% w+ _0 N' U2 H9 N/ ~4 k - let th = new Thread(run, "qiehuan"); D# k# t4 ? ?9 H
- th.start();" Z! N# V5 j( n- I
- }
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; \: t- S. u7 b& X6 {9 o0 R' Q- function render(ctx, state, entity) {. Y8 x9 M( D1 S9 I t) \) b
- state.f.tick();
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/ @) F8 J5 p* e- function dispose(ctx, state, entity) {% H# e( j& [# ^: L: d7 r: r
- print("Dispose");
4 h; _ Y. A' l - state.running = false;
- e4 U( T4 o7 ]9 f! E1 T& A - state.f.close();, x1 T) L" b! R- q z1 E% u
- }
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- function setComp(g, value) {
- {* t% Z( j3 d' k - g.setComposite(AlphaComposite.SrcOver.derive(value));. \' t" u# S& Z0 R3 k' J
- }
复制代码 6 `: G' w/ Y6 Q/ ~ `: ^
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。0 \0 U' Y" \2 X1 ]4 _6 o1 o/ y
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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)1 X; d4 ]+ e, g8 h4 I
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