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# ~0 F3 ?9 t. G: Z; [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。: \% q' X$ q4 |; s
- importPackage (java.lang);4 x1 _' _4 e8 i# B( G) {( W
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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$ N4 I) P: i( q3 i! a$ l4 E* b8 G- function getW(str, font) {
5 B2 c0 H9 R/ C - let frc = Resources.getFontRenderContext();4 n, `4 P' ] S& @ i) q* L
- bounds = font.getStringBounds(str, frc);
6 \ X/ K8 m( Y' z" ] - return Math.ceil(bounds.getWidth());! W; ^5 a( H+ x% E" T, q
- }
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5 C' q3 @4 f, t7 Q& s3 `) b' G- da = (g) => {//底图绘制
* A& _) s0 ? K. z* L+ d - g.setColor(Color.BLACK);' Y8 Z2 [/ k, b. g! o& I
- g.fillRect(0, 0, 400, 400);
6 x f; N( W$ V v) Y: U+ N9 i% Z* o+ t' a - }
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: J5 ?, h; A% q! V5 h# f8 `& c- db = (g) => {//上层绘制
$ m$ e$ u# P# |) E - g.setColor(Color.WHITE);
n( r6 f1 f0 N! f! {5 p9 i$ Z0 x& w- l - g.fillRect(0, 0, 400, 400);3 i2 Q) R$ P& S' M/ ~& I; l
- g.setColor(Color.RED);
' }; L5 ]1 `# K7 R+ W - g.setFont(font0);/ z) Z) }' C7 A; n! S3 b
- let str = "晴纱是男娘";: H R0 k6 N* R$ L/ G( ^ w
- let ww = 400;
8 x* ^$ G# x( {0 w' K - let w = getW(str, font0);0 P7 A4 o9 ]9 F5 n7 Q- w: R
- g.drawString(str, ww / 2 - w / 2, 200);
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% P. g J" |, G8 H. {6 Y, Z- const mat = new Matrices();' P8 j2 ^0 O: i+ e% Y; K8 U$ y
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {* L, m& L$ o% K8 N
- let info = {
( L% \# G- @2 f8 j9 S - ctx: ctx,
% D" x3 Q0 L m" o/ f - isTrain: false,4 q& @5 c) @7 X, v2 N
- matrices: [mat],
, X* \4 Q1 B4 p4 q; O: w) |9 o - texture: [400, 400],
. v2 [: t* V, Q8 p - model: {
: s w5 D( e$ N% K* K - renderType: "light",
& I9 K2 ` C6 m2 J3 k0 X - size: [1, 1],
* b/ ]1 b" B5 H& K; {! ? - uvSize: [1, 1]
6 ?. U7 ~- O8 {6 t8 p+ K2 D1 V - }
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- let f = new Face(info);
, m7 g2 i, g8 q# I6 u. z - state.f = f;
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/ Z( L+ U' `+ c: R! \( v- let t = f.texture;
; k% @9 L: k# ?2 t% S7 o9 m - let g = t.graphics;7 Z* Y8 a/ \3 S$ S9 K' w# I0 e6 c
- state.running = true;7 \6 G$ W6 ]& `5 [; b
- let fps = 24;0 d9 D8 q% P1 e) l" q
- da(g);//绘制底图
- i$ Y! E3 D1 r2 f0 C - t.upload();3 c; X E O2 N7 H7 s2 J, Z0 |
- let k = 0;
' G0 R! a7 S, l6 x- Z7 D - let ti = Date.now();
0 `: D3 F4 ~. B - let rt = 0;
( u6 Y( C$ v6 M2 R9 v2 ` - smooth = (k, v) => {// 平滑变化% P/ ]# R3 h: N
- if (v > k) return k;
7 {) t. O9 I6 B. D7 } - if (k < 0) return 0;
( I# c4 u8 { w$ z# G4 ~! t# U - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' L; @: R" j7 y8 h4 D& R
- }
0 r" i/ v) G! P T - run = () => {// 新线程
# X+ \4 @$ j7 N U5 y# L" f - let id = Thread.currentThread().getId();8 ^8 G! }$ f9 l6 z3 G# h) E1 b
- print("Thread start:" + id);/ M: {. o! ]3 E- y: T. l8 }% K
- while (state.running) {% R2 w3 `% e* I# ^1 O$ G& Y- y
- try {0 U" ?* c2 L- y9 K
- k += (Date.now() - ti) / 1000 * 0.2;, q' w5 B$ q- w( u, `9 g% m
- ti = Date.now();
" o R/ P" B- B - if (k > 1.5) {
- [9 A: j8 i2 k: B9 w - k = 0;
8 s4 W/ X% C/ w3 q0 \ - }
8 ?- S7 U# m: v7 G" E! D - setComp(g, 1);
6 C D }. k$ y7 L& S - da(g);' Y% s+ C8 r* D. Z% B/ Y3 {. p
- let kk = smooth(1, k);//平滑切换透明度
2 L* h* ]' H9 r2 V0 x# q - setComp(g, kk);6 @( m, @7 d' g5 o$ B" ]
- db(g);5 B2 l# a, t) K W* x
- t.upload();
) ^+ |8 t; O! B P8 N - ctx.setDebugInfo("rt" ,Date.now() - ti);
/ l! x7 ~' M& ]# Q+ \& \: J+ q: w' [* z ^ - ctx.setDebugInfo("k", k);
1 \. P, S4 [2 b - ctx.setDebugInfo("sm", kk);% m/ j8 m7 [& E) e0 K% j
- rt = Date.now() - ti;( H6 H0 i0 N' v+ M) d; ]( I
- Thread.sleep(ck(rt - 1000 / fps));
. ~! e: n* q1 B1 Q9 _$ A8 V - ctx.setDebugInfo("error", 0)
* N" G& K( t3 j: n3 X( \) \# o - } catch (e) {
1 Q* v$ [2 j1 { o0 s! |, r - ctx.setDebugInfo("error", e); ~2 }2 \& N) w
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- }" G: R, J+ a5 w; m. d, q& N6 a F
- print("Thread end:" + id);! |" f7 H2 ]1 L: g% u* s
- }
, C1 g+ J& H: a - let th = new Thread(run, "qiehuan");
! z: p+ q, o6 \, L0 } J+ @) e( P( B+ y - th.start();8 r0 A! g1 o% s4 y, N6 R
- }
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) `8 I) V+ c9 a; m: b( u- function render(ctx, state, entity) {
1 a0 ]2 K+ [8 ?0 {7 A# v/ A9 r - state.f.tick();9 C5 S( Q; j5 D
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- function dispose(ctx, state, entity) {9 k& m9 y/ y! ~3 c4 O7 k' ?9 o
- print("Dispose");3 V) V' o7 s. R, b
- state.running = false;5 \2 N4 s8 q( M
- state.f.close();5 S* ]1 O+ O% `" ]# E
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- function setComp(g, value) {
& E7 `9 [8 T7 K8 @ - g.setComposite(AlphaComposite.SrcOver.derive(value));1 r. K0 p6 Z! g: Q9 y
- }
复制代码 " _: a% |' o+ L* L2 X! V, N( X" f
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)/ U# |3 V0 i+ Z! T$ D! g
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