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! Q3 A2 G5 q+ w: j% y# U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。' w2 V8 ~: S& T0 \( i# K6 N) y
- importPackage (java.lang);
' `8 K2 g# {$ Z4 y: ] - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
2 Q$ q* Y- {( F. N
& [! e1 a. e& X% y2 Y6 f6 d) @% W. i2 @) i- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& u1 C0 s- V4 C+ {) I
9 Q" a7 @& H4 X* F% H9 q, n7 m5 l- function getW(str, font) {
+ }3 |+ Y; g" L/ A- o: V - let frc = Resources.getFontRenderContext();
' m3 ?6 t& ?( K - bounds = font.getStringBounds(str, frc);
* s. Z7 C6 X7 k - return Math.ceil(bounds.getWidth());
: r ]- d4 V/ j1 ^! c8 ^ - }/ ]5 x! t* @! K9 u2 B x
4 p% c9 R+ ~: w- da = (g) => {//底图绘制
. b" J+ F# ~0 i2 U* s - g.setColor(Color.BLACK);
1 i. `; Q# j( s5 u1 I; I - g.fillRect(0, 0, 400, 400);
3 m) b& |( d: r& d$ f+ N - }
& h" N* \) Q! ~/ |. {/ ^ - 4 R2 M8 g' ]! r3 j% _% w
- db = (g) => {//上层绘制
( P# L' t" E3 W* @: f2 ~" g - g.setColor(Color.WHITE);. E0 z% B, k$ v. W5 n
- g.fillRect(0, 0, 400, 400);
/ L* j8 K% ?) A' \5 G! I! ` - g.setColor(Color.RED);$ H- m3 b, Q2 c( l7 h
- g.setFont(font0);: B' Z' m) P; A
- let str = "晴纱是男娘";
1 ]6 w; y! X" ]1 T - let ww = 400;' j6 o5 W: r6 O
- let w = getW(str, font0);8 C% U( z4 _# z4 _; \2 U( c9 r
- g.drawString(str, ww / 2 - w / 2, 200);( f* q$ c+ ?' N( h( ~$ I8 H% {
- }$ L" }1 M7 S5 f) ~: } t$ p. d
' Z+ k* ~! V0 T' c3 Q; b- const mat = new Matrices(); }% h3 ^9 P O6 ]& ~9 I$ l2 Y0 ?
- mat.translate(0, 0.5, 0);8 u, ]6 \6 {4 H8 {& Q' S
- , \- |" n; J. j6 h. ]4 p! W
- function create(ctx, state, entity) {
8 l! F- G0 c4 G) q" P7 K7 @. J% A$ ^2 r - let info = { p0 n" j( }% p& e( E% V
- ctx: ctx,
' f. a/ s; f! c - isTrain: false,# W/ T! N, k: d- H
- matrices: [mat],
% n4 h! S2 O; G5 J& V - texture: [400, 400],/ i1 O3 Q# M6 v7 `0 a, m
- model: {
, D. ~) Z( B" {( v7 n+ s" }" | - renderType: "light",/ F) Y, N5 T$ N* F! m) `
- size: [1, 1],. O3 {: `$ R- N2 \. E5 i0 y M6 R
- uvSize: [1, 1]1 p1 P8 c2 W9 e1 X) Y7 R
- }
- u$ r1 L4 j+ @, _ - }
4 g ]: ]* G, A, ~ - let f = new Face(info);9 L+ N3 C- @! ~% w. g
- state.f = f;
6 L" V$ l1 I. h& ?3 n" F! h6 g - 3 F% F, ?4 p' H1 `! i7 Z& f' Q$ i
- let t = f.texture;
3 d: |& A9 H2 o# A - let g = t.graphics;
. A$ ~7 D7 a$ q e; [2 ?( `. Q ` - state.running = true;$ r9 b$ d. g I: D4 }, I* H
- let fps = 24;
% E. |% S* g# M - da(g);//绘制底图
, P5 f- M" s8 R+ e) v. R9 |, J - t.upload();
0 A* D, |8 ^# H& n - let k = 0;
" s, d, f) ]" r9 A - let ti = Date.now();& c1 C2 l' P2 i9 W3 ?& P' ~& N
- let rt = 0;% {; w% s# h) x4 @: j# x
- smooth = (k, v) => {// 平滑变化0 m. P9 O( h5 {: t
- if (v > k) return k;% C& R6 @$ Z! U3 D
- if (k < 0) return 0;
; s5 c& ?+ g( s0 O - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* @0 @/ a: ~' h! L - }
: w2 W" D0 f4 f7 V. ~ - run = () => {// 新线程
) l& B9 h& f* w6 O" Q4 g* | - let id = Thread.currentThread().getId();& l$ K. B% M t( i: j0 p$ D
- print("Thread start:" + id);8 |( h# o# a) }8 t0 @$ `. h
- while (state.running) {5 p$ x$ J5 g( p6 i. U! a
- try {
* L4 x. g9 R5 ^; z1 X9 d' ], y1 A - k += (Date.now() - ti) / 1000 * 0.2;
/ M- n S) P( v* h - ti = Date.now();3 i9 W! K% y* r) o* E, y
- if (k > 1.5) {0 n9 L( T( ~7 R% W
- k = 0;
7 A# R4 _2 _1 Y" h1 e - }) W# [- ]/ W) a4 d& H5 O! G
- setComp(g, 1);
5 v) V7 t+ z* C3 q - da(g);
! `$ B* }# M$ o - let kk = smooth(1, k);//平滑切换透明度
! I: N6 X- b7 q" C6 v( c - setComp(g, kk);, c$ C8 ^. J* C" y! U; f- [& |6 ^
- db(g);
- P3 t" d- G) @" U' n f% b. T - t.upload();; k7 `1 t6 E; v4 f
- ctx.setDebugInfo("rt" ,Date.now() - ti);6 }& C+ e/ f8 G* V# w
- ctx.setDebugInfo("k", k);$ w' {6 L) |3 X# m/ P' r0 z5 F$ c
- ctx.setDebugInfo("sm", kk);
& e" k+ Y( O" @+ [ - rt = Date.now() - ti;
9 x r# t, e# S% L+ ~ - Thread.sleep(ck(rt - 1000 / fps));
7 r% |! d) g% V1 P E" n - ctx.setDebugInfo("error", 0)# a) x- c# @& p
- } catch (e) {( y7 b1 v' O% H4 f d7 ?
- ctx.setDebugInfo("error", e);# x( a! N2 F0 ^3 n- W1 Y0 q
- }4 }+ n- L, ^2 X! O, `$ ~
- }- o& N$ o* f! }# p. B
- print("Thread end:" + id);: H5 G# R! _, G) p2 i, t) D; [4 k
- }8 Q; y! z3 `0 }5 L7 U9 @+ \1 ~
- let th = new Thread(run, "qiehuan");% K+ g& s# S* h; f! y* @5 \. d
- th.start();- I! \- X/ N7 c& n4 O! u# D
- }( |* l+ L U& | w# {
- 2 ]6 P- ?* x ?7 y0 ^3 \
- function render(ctx, state, entity) {6 ^) A7 ^6 B& y+ \' V0 k% r
- state.f.tick();
# r V" u+ Y) I K; W' Y - }. H+ t* {* W5 L0 A% i- T/ r
+ c) e, G+ G- B6 Z/ O& @( r( h- function dispose(ctx, state, entity) {) d. x0 x* y7 m* V, }& A6 m" n/ s2 N
- print("Dispose");
5 W5 K- q8 a3 A5 u; t0 i - state.running = false;7 n w& G- Z1 ^% b
- state.f.close();7 P2 Z3 w" [ S" o
- }9 L# p+ f2 X' y8 j/ `
: ~# r0 v" u' M! a `- function setComp(g, value) {
0 Q3 l) U% R6 G- I! _3 V K - g.setComposite(AlphaComposite.SrcOver.derive(value));$ h8 t7 N' @2 Y
- }
复制代码 3 T6 M3 {0 n/ A7 X$ E& R# T
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。
/ i( \7 X/ L8 Y2 U! O, p r1 J2 q& k
. |4 i' J1 {% X. a. w* y顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# J3 y* Z6 R/ q0 ~
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