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8 q/ {; k8 w0 Y! G# M; O& R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。
* {9 h% o( M3 ^9 D5 {& t- importPackage (java.lang);
- ~, v' N2 m7 C7 U8 j: I z* } - 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);4 E( N9 Y4 M2 x
- : g5 M. i$ [$ X& i7 u& F9 V
- function getW(str, font) {
) K- i, }: A9 X7 I - let frc = Resources.getFontRenderContext();1 u6 ^4 F! U' m# k1 W8 t% {2 u
- bounds = font.getStringBounds(str, frc);, u: a6 r6 ? H9 T' ]' U4 L# F
- return Math.ceil(bounds.getWidth());6 j+ U/ h: Y: t: h7 W# [# q5 T
- }
+ S* @% Y: B+ \0 L' l3 v
( H; A1 {% ~3 ?- da = (g) => {//底图绘制* T6 p7 j4 U3 t( s
- g.setColor(Color.BLACK);
7 B# n( k5 } D- m - g.fillRect(0, 0, 400, 400);2 k4 @" y3 U9 t* F. A
- }1 V* r ^1 ^/ Y+ A7 k- ~
" i# _1 U9 I+ n* g9 X* [3 h' ?9 T- db = (g) => {//上层绘制
; }; _. K4 [ W" d - g.setColor(Color.WHITE);: {7 q! O) g& A; m0 T
- g.fillRect(0, 0, 400, 400);
2 w2 v, O5 G1 Y# a) ^; K8 w - g.setColor(Color.RED);2 u2 L" I5 e$ f+ d' e
- g.setFont(font0);
2 F/ m9 c+ i/ D: r9 {2 Z - let str = "晴纱是男娘";, i2 f1 R8 ~2 W* f: e7 G) @
- let ww = 400;
2 h, @9 w- L1 G, A$ v' s6 y - let w = getW(str, font0);6 S R8 o, z7 A# f
- g.drawString(str, ww / 2 - w / 2, 200);
m4 F# t) q& i& M v( k - }
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- const mat = new Matrices();
2 N* z+ d/ m6 a* s" f' J - mat.translate(0, 0.5, 0);
- f4 u# L" J Z9 ~' z3 D- D/ _% j - - P$ }* \2 Q$ ^7 V1 j; [9 b9 w
- function create(ctx, state, entity) {
# U8 X z, z5 Z9 H+ a3 N - let info = {
# R/ K# V8 Z+ y$ J6 N& h - ctx: ctx,/ o+ @7 i8 u$ n; S, _( D! |
- isTrain: false,
* C. V* P7 I. ], x9 e - matrices: [mat],
$ I U a7 M, J/ \ j7 g& _ - texture: [400, 400],
* b, c" N: M) C - model: { V8 A5 a8 _" d1 e5 w2 \3 t
- renderType: "light",
* k! w; ?" w+ w2 F& P3 l# N - size: [1, 1],
' j4 ]2 U* H' j' P - uvSize: [1, 1]
. }# ~# N) h7 Z g9 s - }' k2 n2 ~% b: e* I6 q* }5 y- ?* R
- }
; W6 f( J# g$ g1 z" b - let f = new Face(info);7 j1 p& M1 f; [
- state.f = f;
: f' m/ M# U* f- v8 |- ?
/ W1 _. a* _, b: J% |# F- let t = f.texture;
; N( o+ L" G3 | m - let g = t.graphics;
3 v6 v. m* L# z - state.running = true;2 _4 I7 e1 h' ?0 H; l" _. W* S3 @
- let fps = 24;
# o$ x/ W$ C5 s3 M6 |4 Y - da(g);//绘制底图
# F0 W; S9 r& H' k2 Y - t.upload();
% X4 F$ r8 c( }8 v* { - let k = 0;# F- ^. c: f! h$ t
- let ti = Date.now();* }! d7 n( V3 h& }6 }
- let rt = 0;
7 K* h" u) Y( d( K6 e - smooth = (k, v) => {// 平滑变化
5 N9 ^* S' d- `/ Q0 W - if (v > k) return k;
' M# D7 j7 D9 c% F - if (k < 0) return 0;+ I5 s4 I% a* D1 Z3 B
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
4 |: B1 b; p; F9 l- a8 v' [* T - }
4 [/ @& e5 ]; n8 W5 T - run = () => {// 新线程9 H W% p! c& t1 K z6 E6 n
- let id = Thread.currentThread().getId();9 k' O7 J3 [% w" e! j0 k9 G, p" t" Z
- print("Thread start:" + id);; V* h% k7 w/ ~) L8 R
- while (state.running) {
0 _ N( ?7 i" o) n. x% Z - try {6 }; Z/ C7 m& R0 o" I! C( X
- k += (Date.now() - ti) / 1000 * 0.2;
& e3 a0 c3 x1 Q. w0 H& m- i1 ^; g - ti = Date.now();
7 O8 K+ o( S+ M% D7 y - if (k > 1.5) {
/ d8 W4 Y( ^# `2 ~) Y+ O# ] - k = 0;- S/ l( N6 S, G* c- z+ ]
- }# J5 @( U ~ d
- setComp(g, 1); Q+ A0 Q; x. }, G
- da(g);
- E+ q, U) s. Y5 | - let kk = smooth(1, k);//平滑切换透明度
6 z" e. t8 }0 ?, y9 v1 J- @* F - setComp(g, kk);
; w1 _+ k( Y. m8 j2 g* U - db(g);! ^. L8 e! x- D% e# J5 t
- t.upload(); w9 w' h/ a+ z: N" h
- ctx.setDebugInfo("rt" ,Date.now() - ti);
4 D7 ] S( n8 J - ctx.setDebugInfo("k", k);" l+ z9 m' C& y: n: g
- ctx.setDebugInfo("sm", kk);
$ u, I2 k9 p& U; g' {3 G$ g4 ? - rt = Date.now() - ti;
- n* R7 ?7 m8 I; O - Thread.sleep(ck(rt - 1000 / fps));
: h2 X2 C$ [7 t6 l: f$ s - ctx.setDebugInfo("error", 0)
) J! T2 z. J" a' Q& Y9 F - } catch (e) {
. A6 Q/ s% g# C; b( k, s7 H - ctx.setDebugInfo("error", e);# Q: A% K6 ~8 }4 c0 @6 ~/ H
- }2 H5 v4 b+ i: k$ V8 j- i
- }4 z. D, ]) `% e* e% ^/ G
- print("Thread end:" + id);8 @" G1 H, A) g0 q) w
- }( `, f1 y4 ^+ V* O5 k/ U
- let th = new Thread(run, "qiehuan");
& W7 w- S8 _8 x4 i4 D. ] - th.start(); l4 I; M( A! Z$ ?2 K
- }
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- function render(ctx, state, entity) {
) s! S/ v' v2 x- b: K# [ - state.f.tick();
+ V! j+ u A1 Q. \ - }
' I3 ?$ }7 R4 m) \& I& N* m - $ g( B# M* i+ N
- function dispose(ctx, state, entity) {% s& V5 Y. x0 ^; U" r& R; B
- print("Dispose");
, ^6 D" f {0 f1 X( W% e - state.running = false;
: X+ T. G+ E/ B7 N& y5 E - state.f.close();
9 ~- V- j; i) p @, e7 @! E - }
2 F( n4 T+ E2 f. X. W! z' M# [
& `: ^+ z" \6 q- ^* t/ N O1 e/ p9 {7 N- function setComp(g, value) {" h6 L% T C* n/ _7 D; j0 a) |
- g.setComposite(AlphaComposite.SrcOver.derive(value));
' ^9 \* ~& Q- ~2 l8 t- C7 D" W% S0 y u8 @ - }
复制代码 $ V6 ?, V8 C1 U
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。+ B: A a' ]5 B6 S
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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)7 q4 g3 r. }( X% T/ g
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