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: G2 e) Q' u. v& R/ {6 ~6 K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。
/ B1 v1 \) G5 e( @3 {- importPackage (java.lang);
4 ]" ?0 i) d) A, G - importPackage (java.awt);$ a9 i7 H( V. l! L1 _' q% H1 b; _4 H
& c6 s# L* d3 W! C, @8 ]4 Q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 }! g- x6 Q4 F$ V6 Y C: _' q; _9 ~
p% c% x6 u1 t( O5 z( x: X7 R* `3 x- function getW(str, font) {# i( O: P3 d0 w
- let frc = Resources.getFontRenderContext();
' [% p! E7 i# o. Q- X/ T- l - bounds = font.getStringBounds(str, frc);
* C# u) Y9 Z* j, q - return Math.ceil(bounds.getWidth());
; Q4 |& \ q! q' } a5 K, ` - }
* s7 e. d4 M+ V - ) B- p! G, h- |( e& C9 L
- da = (g) => {//底图绘制* V+ a( q: K& o
- g.setColor(Color.BLACK);4 f5 c' S1 B, C: n3 I9 }& d& v
- g.fillRect(0, 0, 400, 400);
5 L, {- q5 |3 B- z4 z - }
5 G" l( i, ~$ J" {1 S! F* T - 3 k$ ^1 a* {' l) Z; a
- db = (g) => {//上层绘制
0 v7 m/ R5 J4 Z - g.setColor(Color.WHITE);
4 {9 Z5 o m" ~! c( p- a5 e7 ]6 r& N! c8 J - g.fillRect(0, 0, 400, 400);3 j, m' \5 F P' R$ R
- g.setColor(Color.RED);
, u! C; p! L y8 m5 I' ^* H - g.setFont(font0);1 }8 m6 i7 F G9 ^0 p X
- let str = "晴纱是男娘";
7 \* o& z+ S4 u: o S/ F7 |; d" I - let ww = 400;% B) R' j6 K( C7 @% L
- let w = getW(str, font0);
9 X- L0 i, J3 X7 f: Q - g.drawString(str, ww / 2 - w / 2, 200);7 B6 J m' d! P$ i! S$ @
- }, C1 N' p: v7 Z' ]2 U/ u; q
& o+ _6 ~: ~ V$ a- const mat = new Matrices();
- I9 S6 _: O0 P+ n- Q% y) j - mat.translate(0, 0.5, 0);; Y: y' C6 T: \ S% r% E7 i1 U
O* [1 g: o ]. b9 M2 \9 n* x" J/ p- function create(ctx, state, entity) {
n9 h% Y; E5 I& K" B1 v - let info = {7 h4 l3 Z N2 n3 Z' ` p9 ^9 N
- ctx: ctx,
% S8 H2 U* N- p2 }7 ~4 i+ S: @ - isTrain: false,
/ I S! C4 w/ O: k, x) B - matrices: [mat],
) v3 c0 N, i, q' |, R - texture: [400, 400],
5 A6 f" |4 H& H: [$ _/ A9 q - model: {
/ u7 v1 r# z7 M6 o( P+ W: }/ d( d2 q - renderType: "light",( t/ u# n" m% C1 K {- b$ j. @
- size: [1, 1],
/ X! ^9 L: l4 y4 i - uvSize: [1, 1]
$ V$ `+ u8 G6 X% M3 R$ r% g - }
; z+ D$ w* r# b - }5 C: d5 y/ N& d5 ~1 |# i; ]
- let f = new Face(info);1 d n! [) k- M
- state.f = f;
, u( K& o/ V' p0 @8 g! T - 7 J. D" \$ y6 N3 o/ t
- let t = f.texture;
6 z, w0 ?. r& j7 E$ \9 m! [ - let g = t.graphics;
h5 i9 n- Y7 b+ B0 L3 W$ l9 B/ ]! T - state.running = true;) ~ `. i/ C( g0 g7 u4 [$ t# i
- let fps = 24;
4 d W% w# O7 F' S0 Z - da(g);//绘制底图+ d' ?" r! g2 Y6 N. M
- t.upload();
6 @ h( V: h2 t$ L5 {; H - let k = 0;
9 i% g6 m* M4 @, S7 o% D& z; W - let ti = Date.now();
5 E4 C5 x& z# k, l0 l6 d- X8 k% z - let rt = 0;& W0 Q8 G8 t& C: R
- smooth = (k, v) => {// 平滑变化: X$ B7 D6 z# V, T
- if (v > k) return k;
. H0 }2 \. @& I% d% ] - if (k < 0) return 0;5 z7 t4 i' p/ D% E7 E
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 E3 B+ Z9 h( S# T+ _
- }
& ~8 {: b6 P/ D1 E% |( l+ W$ H - run = () => {// 新线程% D& n' _4 E3 R6 |
- let id = Thread.currentThread().getId();% O$ B5 Y8 A% e" _7 Y
- print("Thread start:" + id);
2 X! T# _. _% s4 {; S - while (state.running) {4 d% A, O6 o8 x6 B0 O
- try {
/ R5 H2 H" w. [6 f$ C+ M/ ~; i2 }4 u - k += (Date.now() - ti) / 1000 * 0.2;
, z1 H* x; x7 f& I- @ - ti = Date.now();
w' r" @2 X; n/ n - if (k > 1.5) {7 z; J2 ]0 A; ~2 C. h
- k = 0;8 D& X( H4 i% ~0 A" g- e" D
- }
3 ?; ?' g8 \. i6 s& s - setComp(g, 1);1 l/ A1 q9 ?1 j+ M q& x
- da(g);' S$ l& g, J' D* X3 ^# M
- let kk = smooth(1, k);//平滑切换透明度
+ `0 `: l* @, D8 u( l, T - setComp(g, kk);
/ q: S4 ? r, K7 i5 B4 Q# g7 V1 e - db(g);+ Y6 G2 Z1 g, }* b9 X
- t.upload();
8 A. X/ |/ e% I G0 K/ F7 |. { - ctx.setDebugInfo("rt" ,Date.now() - ti);6 R/ q2 }. y0 ^! ~% z- x( B
- ctx.setDebugInfo("k", k);
6 L% g; {) M( t - ctx.setDebugInfo("sm", kk);- b0 h; L% f# ~0 v; e- E
- rt = Date.now() - ti;) V" q% f0 t( ] Y) o
- Thread.sleep(ck(rt - 1000 / fps));3 q( k3 k! f- z
- ctx.setDebugInfo("error", 0)
& T9 T3 V9 _* }8 m) _+ ~ - } catch (e) {
% K9 ]) b: [) W5 u6 n - ctx.setDebugInfo("error", e);
, y5 _- t x- ?6 t3 o - }
: U/ Y9 F1 X& Z6 T g - }
7 T; k$ }, x* w1 s$ F3 b - print("Thread end:" + id);+ {6 |6 {" D6 A: \' }$ S4 N" f6 t
- }
; J J) R. {9 x9 y3 g - let th = new Thread(run, "qiehuan");
' o' l8 B# `5 X% q: P - th.start();4 L1 p* ^5 `, K- Z" j
- }9 l+ I7 N3 ?5 y1 T% r1 o0 }
- ; d2 ], z P5 }8 _5 |7 k. ^, t9 i
- function render(ctx, state, entity) {
9 a$ U2 Y0 f, B) j( C - state.f.tick();
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- ; L4 m# K4 A @+ D' ?/ Y
- function dispose(ctx, state, entity) {. f; g t: s% A$ @* c( N( b' r
- print("Dispose");
/ s3 J T1 W6 t+ @ - state.running = false;
! e) F6 w3 U( c! ~2 { P& P& R5 H - state.f.close();
# j% V0 ]$ F$ H% o' f - }( t4 J- f- H7 n# @! O" e; T- x# R
- 6 s7 i$ m7 U0 {: r- w
- function setComp(g, value) {7 z5 b% U5 e) H# O
- g.setComposite(AlphaComposite.SrcOver.derive(value));3 ?) u. }- ] ^" k5 t6 t9 _8 G' M
- }
复制代码
5 f6 t# \. a, G8 \7 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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% d% y5 M- ]& V2 ^/ i2 C1 h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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