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/ n. R: i6 Z- j# |. p. n: @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。
$ o* b# U% L. |2 U3 {- importPackage (java.lang);
8 S" K0 x0 B: `" y - importPackage (java.awt);0 D( p$ x( P: n6 j! S0 u
3 U* z) ? g l) o1 C/ ~- include(Resources.id("mtrsteamloco:library/code/face.js"));
l) I: R: E, I5 R( ]# ?) G
. M/ c$ d% D* a+ V( H- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
( ?/ X# H9 \, y, J3 w - ! [1 u& y- j" s3 x6 y% S- e
- function getW(str, font) {
; R* t. [$ m1 c$ l - let frc = Resources.getFontRenderContext();3 p! @& Y. |! _! b1 p) D
- bounds = font.getStringBounds(str, frc);
/ h2 E/ v$ f Y) F$ p& c Z - return Math.ceil(bounds.getWidth());
4 L3 {0 h# c: E - }
& M1 [8 p7 u. p
" h" \0 U% Z9 i- da = (g) => {//底图绘制
3 s3 q! H r q* ]. p$ V% `$ {$ c6 ? - g.setColor(Color.BLACK);& U# A }" c" N. }! h( V6 Z
- g.fillRect(0, 0, 400, 400);0 b# i @ H2 z3 Y1 d+ t
- }" o+ K0 S: n m$ n( T
$ G3 d0 j" v2 g" i- db = (g) => {//上层绘制3 {/ D) J; F# H. a' j- t2 e
- g.setColor(Color.WHITE);( d+ N+ r8 d: d2 h" J
- g.fillRect(0, 0, 400, 400);
+ q; R4 d, D# d& l. F - g.setColor(Color.RED);2 \; p4 ^4 `& Z7 c+ L* G3 _1 }
- g.setFont(font0);+ V4 f( s5 d$ H. {9 r# O. C. J+ w
- let str = "晴纱是男娘";
! o* ~; j- {6 c E+ s9 s$ x) d - let ww = 400;/ o4 A- p8 O1 `
- let w = getW(str, font0); C- S+ y/ H: N, N7 y
- g.drawString(str, ww / 2 - w / 2, 200);
, J8 Y' t5 |# l1 F5 |4 |3 ? - }
# ~0 c h. Q8 ?" H. J1 m2 E
; K6 H( C' Q; f# K( y- const mat = new Matrices();* B; k- ^. w: Q! [
- mat.translate(0, 0.5, 0);) U# v/ X# t: @; @
- 8 c& u% i9 Y3 Z* ]: N3 C6 c
- function create(ctx, state, entity) {
" O8 \& ]* i$ U9 z7 T - let info = {3 F3 I/ ^3 k |" B# K: ?+ ?
- ctx: ctx,3 n) _6 k! }) @1 {8 H+ X ^
- isTrain: false,) h ]0 \: [9 j( n4 t
- matrices: [mat],
; N& [( ?3 c& p% y3 _ - texture: [400, 400],
# m9 e: n- e$ _% E8 E - model: {2 k% J+ G9 I: a5 R3 ]5 r
- renderType: "light", a3 {" A# c& Z* \; L
- size: [1, 1],% l! N+ v! n! r; a K2 r2 p* [
- uvSize: [1, 1]
; q/ G" }: T& A" b - }4 H$ M: E+ m* c
- }
0 A' s+ {6 `$ }& h1 N: s" i7 T - let f = new Face(info);. `' m8 J" c/ z
- state.f = f;
! y! z8 F. {, H3 Q
+ S! m! d" c }/ R0 B8 Z! C- let t = f.texture;
* l% d9 z- ?2 L Q - let g = t.graphics;$ k% p1 Z# g) U6 u' J0 \+ J+ }
- state.running = true;
8 ]' F2 \' f, e9 N$ }/ {+ N8 u- C - let fps = 24;
/ a) q/ A7 W; o X6 W - da(g);//绘制底图
& A4 M6 B0 a( o% g - t.upload();$ U/ ^! @* P" z' z& s* f2 T
- let k = 0;1 } @+ a$ D" V! O6 V! v
- let ti = Date.now();5 l8 n9 k9 ~; s, W4 Z
- let rt = 0;2 K6 Y- V0 L# U, M2 a' M
- smooth = (k, v) => {// 平滑变化+ V. K- n- Q% |& G; c8 x# D
- if (v > k) return k;& n. w) O& w0 ?( s4 f% ]: ^1 _
- if (k < 0) return 0; J6 x* n! i' y Z
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 v& e! u) s- Y: |0 n! Y - }
1 G/ Y% G: Z" e# M" ^% { - run = () => {// 新线程
7 ?, D6 N5 ~9 e' i, h - let id = Thread.currentThread().getId();# O% R/ {" V/ i
- print("Thread start:" + id);
0 ~# x/ ^2 C; p% m- F$ j - while (state.running) {
! z7 O3 z9 t/ W& {! D* N5 ~ - try {8 e: t o+ d) l3 L8 f. q0 R
- k += (Date.now() - ti) / 1000 * 0.2;- x- U0 }( e+ m; ]7 u) C
- ti = Date.now();
/ b+ Y' I% }5 h# Y! t - if (k > 1.5) {8 e ]) A! h; ^9 f, m/ F5 n
- k = 0;
1 a0 U+ z7 W3 w$ p9 k - }& w3 l8 a+ b7 {. q) c0 h# `0 c+ a
- setComp(g, 1);
1 Y( ~4 C2 b" ^5 u# ]. ^9 J - da(g);# N `2 R7 D% I7 W: K1 y
- let kk = smooth(1, k);//平滑切换透明度$ u5 E w- _8 Z" R$ S# w5 u
- setComp(g, kk);
5 r' w- v/ D& K8 W _ - db(g);4 C2 n# }/ k% a; N) _. r1 Z! s
- t.upload();
8 U- ?# t, ]+ d. } - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 A2 i; N8 k6 E5 d$ _( I - ctx.setDebugInfo("k", k);
" O$ i' n, R% V' h - ctx.setDebugInfo("sm", kk);6 S' D5 [2 W0 x! W/ X0 R, ^
- rt = Date.now() - ti;
7 T* H4 q+ Y, c1 U - Thread.sleep(ck(rt - 1000 / fps));2 ?# U. S; A7 k! a
- ctx.setDebugInfo("error", 0)/ \6 i8 D( m7 t+ ?$ ]0 A# n
- } catch (e) {6 n, N# ^: Q$ ]* l. }+ m$ e$ p
- ctx.setDebugInfo("error", e);8 |. D; E+ `, p1 S# n, o: j0 \
- }! ?' I- o7 [0 T: X' i" i6 ]
- }
; E% d; U- {, n' e; B# K - print("Thread end:" + id);6 U" \' C6 O% R8 L- z
- }
7 z& |/ R) q+ B- l8 J: g3 z - let th = new Thread(run, "qiehuan");+ `2 M# S. z( b$ v! i9 q& D
- th.start();2 @4 j6 e& |* d. H, o: y
- }/ K+ z. k4 E6 F$ i1 V
0 f- c5 p3 c* Y9 Q$ q- function render(ctx, state, entity) {* ?9 C, N! {& P( y( J
- state.f.tick();
& J% o; a) X0 m# s' D9 X - }$ L3 x+ I) B& b" _
- 1 ?# F' R) T b6 T) b1 ]4 F3 X6 V
- function dispose(ctx, state, entity) { M1 E* s$ N1 J4 g+ p; j; H
- print("Dispose");
1 t1 E+ E. R6 j( `8 {! Z% l/ Z: | - state.running = false;
; `* P4 y- g" @' V' U - state.f.close();
( t1 G3 U" w, t0 Q/ L. ^ - }* ]& B7 K- b; j6 z! N; h
# H5 R/ v& A( B' r7 ?, D/ h- function setComp(g, value) {
# j- H7 Q' I2 T0 L# y7 w" | - g.setComposite(AlphaComposite.SrcOver.derive(value));
- E* f) G! E! |) h - }
复制代码
) Q- R# i1 `1 C/ k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。
1 S$ \" I7 G8 P: \4 C3 ]$ E" v1 r+ q2 c5 z" V
& P$ ], G3 {0 M( 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)" s) ?4 j7 ?) ]) U4 P7 |+ p
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