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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。3 L7 l) F! @# h, L
- importPackage (java.lang);3 B! E- E6 ?5 @
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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; |; y. l9 Q6 g% s$ r6 p' H- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" B8 F+ i7 w2 m K! z& I
% L" P$ t( ^; ^- function getW(str, font) {8 y& L+ F0 W+ u2 l7 i+ W2 G9 Y8 ~
- let frc = Resources.getFontRenderContext();2 U7 A; k+ e; q
- bounds = font.getStringBounds(str, frc);
$ n, z3 e7 p7 C C2 D8 A* t( F- j* H - return Math.ceil(bounds.getWidth());
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- da = (g) => {//底图绘制! u! X- L$ r9 V' G ]- Q2 p
- g.setColor(Color.BLACK);6 z3 Y6 B+ [) _5 C
- g.fillRect(0, 0, 400, 400);0 A' _0 C/ {! H' j* }# W6 s
- }
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$ R- ~. e5 v( M* h* k) Q- db = (g) => {//上层绘制, k- h5 [. M% Z$ n# f
- g.setColor(Color.WHITE);8 R" b* w) j5 X3 p
- g.fillRect(0, 0, 400, 400);
" e& g1 `: r; u - g.setColor(Color.RED);
! z% r% f7 g: n, F. p+ q* F+ e - g.setFont(font0);
+ |" j+ B, C9 B8 w2 `5 Q+ b1 n+ q - let str = "晴纱是男娘";
! M( d, I' A) n. K/ M6 U - let ww = 400;
. R4 _2 C% C7 [5 k2 n! [' Y7 B$ O- ` - let w = getW(str, font0);" w( b# l1 y2 K/ ^, F
- g.drawString(str, ww / 2 - w / 2, 200);
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0 |; a1 x5 e7 i# [- const mat = new Matrices();7 i1 s& _) t4 ~/ k5 B1 A; t O
- mat.translate(0, 0.5, 0);* Y( Q) ]) @; s. l m# h. v
: ]" V- } {/ C$ v/ _7 h& W- function create(ctx, state, entity) {3 }* k/ {5 n# t6 R' v- M0 d
- let info = {
: c! ^/ |! D& [- M - ctx: ctx,. A& {: k- f1 a. C/ E
- isTrain: false,3 n3 p3 ~+ X0 Y! J( @
- matrices: [mat],6 ~7 Z# U7 W$ Y R% c) X7 V/ |
- texture: [400, 400],% ^; v4 F1 K5 z1 i {* k0 G
- model: {, i# u0 y/ ~) f, Y j; V
- renderType: "light",- o6 D: ~: V1 Z+ V
- size: [1, 1],
% e) U, E4 o1 h O - uvSize: [1, 1]
* K [" V; I; q4 O - }
7 C5 D: k4 Y* t7 S! P% D - }
" s* y, d9 N" R3 _9 l& j' z! J* i - let f = new Face(info);( F% i- G& E, E/ i4 Y
- state.f = f;
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A8 P& u, ~' l- T$ _' ~- let t = f.texture;5 y; o! Q h" @
- let g = t.graphics;) @) t7 v6 _: o
- state.running = true;
* s5 f$ R; Q5 q5 ^% J- d# T) [5 T. y - let fps = 24;- \6 Y: y. M2 {5 z3 Q* j6 ~+ {2 `+ h
- da(g);//绘制底图9 D R; I9 N; Z9 L3 E5 e
- t.upload();& Y1 ~9 |/ A( o3 s$ u. A& h I; N% @
- let k = 0;8 H6 c U2 O* ?. }" a
- let ti = Date.now();, J* A/ w" i0 D) K- B
- let rt = 0;# Y6 ~* |7 B+ C0 l. X5 r' d
- smooth = (k, v) => {// 平滑变化
8 V7 T* ?8 n* x1 w - if (v > k) return k;# ^( ?- `1 o1 h$ Z) \
- if (k < 0) return 0;2 b; R1 P6 U4 h) q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;" B6 G/ O6 g( E4 G* d$ n
- }& k7 w& w @' }+ D
- run = () => {// 新线程
% P3 p Q9 F0 U& } - let id = Thread.currentThread().getId();8 F* Y# l0 f3 q% y6 z" j
- print("Thread start:" + id);5 T# Q L4 |$ \1 f$ X
- while (state.running) {! j! w/ K1 f% z6 t% C
- try {
- V \+ [% S3 P8 _6 G7 b - k += (Date.now() - ti) / 1000 * 0.2;" k. Z; m' w, y- d" X" H
- ti = Date.now();5 a+ _4 k0 L& w7 e, n
- if (k > 1.5) {. P( o& K" F' l1 m& K
- k = 0;8 a* r6 p- r4 ]0 J
- }
; w6 _: x& n' G0 z I( O - setComp(g, 1);
0 V2 ~/ z- M: m9 \* f {% I - da(g);$ a" b7 C L; {7 J/ {( C
- let kk = smooth(1, k);//平滑切换透明度) y6 y: N* I2 S5 [
- setComp(g, kk);/ E5 b5 h" P, l0 U6 U
- db(g);$ x8 S3 g; t; Z: Q8 ]* A
- t.upload();' N2 G M0 L: c; z
- ctx.setDebugInfo("rt" ,Date.now() - ti);$ u- ]0 `1 B$ u) N) D) Z6 X
- ctx.setDebugInfo("k", k);
* J& }/ `& }3 N9 A2 w+ L5 d - ctx.setDebugInfo("sm", kk);* K2 g& o6 H( R, ]7 {% k" A
- rt = Date.now() - ti;
: e3 ?4 _( x2 |0 _$ s8 n% y - Thread.sleep(ck(rt - 1000 / fps));
9 K( D* C" A4 u' y* }4 f - ctx.setDebugInfo("error", 0); B. p- c5 \; X+ W, \. r) C
- } catch (e) {: t' [9 f1 Y' M: \1 ?
- ctx.setDebugInfo("error", e); X9 j! `& M( ^! f8 y
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");& U9 j0 _' A5 \& z2 ]
- th.start();; X. V+ m2 A! p& l( V2 t2 {7 M* R y
- }
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5 A; a' r) B! T: f b- function render(ctx, state, entity) {
6 g. ^ a8 k( j$ K# ? - state.f.tick();% P* D% y/ b3 n' E1 k
- }
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! n2 W$ J5 Y) ? S- function dispose(ctx, state, entity) {8 w& [. f; x0 g2 V
- print("Dispose");
: @& {. z$ s( ~4 p - state.running = false;/ Y6 I8 `1 O, F' X) |1 S P) l$ X
- state.f.close();
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- : a7 U4 q F) x: @2 g
- function setComp(g, value) {, w; T* {7 B# Y3 |* W1 I' j+ _+ @
- g.setComposite(AlphaComposite.SrcOver.derive(value));
4 I; _ K3 T9 K3 W! q) y - }
复制代码 4 ~5 R) }# a. j& \3 q" W
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)
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