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! u& n8 n I. A: g( ~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。
: a. s7 L: r* d) }1 Z. h; S3 ^+ w5 p- importPackage (java.lang);6 [; m. F X5 t1 C# U2 T$ P. J0 _
- importPackage (java.awt);9 u; C6 _9 B! S) H
3 V$ @/ O1 ]9 A. ~& d- include(Resources.id("mtrsteamloco:library/code/face.js"));- V' V6 y7 l$ M% x7 `0 H; |+ d
v& D9 C$ C. B3 v5 {, K( {; L0 t- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- v1 \9 D1 y [3 o
$ W1 }$ z- A2 f C( w- function getW(str, font) {
% D& z! e2 ?2 t8 P% S - let frc = Resources.getFontRenderContext();
8 ?# t) N# O( T0 v& p7 {8 p* e - bounds = font.getStringBounds(str, frc);
* C7 F$ I9 L% w- _& T+ F1 s - return Math.ceil(bounds.getWidth());
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- # n8 K# d$ G3 H' p
- da = (g) => {//底图绘制
4 n4 K! o* M, A: a2 N - g.setColor(Color.BLACK);; N9 w; U+ u) ]4 z' V6 e2 a) I# |! f
- g.fillRect(0, 0, 400, 400);4 v) e* |% {% }: r- I; d6 K1 k1 K
- }
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7 E) {3 q g/ z' Y- db = (g) => {//上层绘制
+ d( i" e5 M& N0 ` - g.setColor(Color.WHITE);
$ N) X1 W0 }" S' H+ ^$ N; x# D! K - g.fillRect(0, 0, 400, 400);! c7 D+ y! x. y) H4 t# i
- g.setColor(Color.RED);: ^6 H8 G1 n- z
- g.setFont(font0);8 Q# Z0 a* t' `2 u l4 |+ h& m
- let str = "晴纱是男娘";
4 z V: a8 @ x9 q - let ww = 400;: O+ a! J2 ?; z: ?) F
- let w = getW(str, font0);6 J: ?8 }5 W8 u$ p7 g
- g.drawString(str, ww / 2 - w / 2, 200);9 E2 p" c7 O& y- ?. r9 Q9 ^8 k5 E
- }
% q: B, N I! w1 \$ h
. ^7 I9 V' `9 {1 r, G0 {8 ]# ?3 d$ D9 n- const mat = new Matrices();/ M! a3 l2 y! t( u+ z2 Q% g8 d
- mat.translate(0, 0.5, 0);
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2 n1 c" O. W: C1 o8 {+ p, T6 p' L- function create(ctx, state, entity) {( z: |- C2 B# ~7 X$ r3 c" U7 c
- let info = {3 G. \# e- [: ^) y
- ctx: ctx,6 n" p& Y. ]* o; d4 c7 Q
- isTrain: false,
* {6 H" z% }; ]( {0 h - matrices: [mat],
( k& X/ O, L. X* Q! f! G - texture: [400, 400],5 L" V' d0 p& t |' B; T8 I
- model: {
8 J' t% C5 w$ b- z" P( N* S8 X - renderType: "light",
2 W, N) p8 s$ m1 j6 @# O1 R8 x - size: [1, 1],
) ]1 A# _ f) b7 U - uvSize: [1, 1]4 p2 ]0 N! r V7 r8 m
- }
- U$ G* Z& L" r z - }8 b- J5 f# K7 s* U; K P% H* v
- let f = new Face(info);/ P# U0 W. [" P. t
- state.f = f;
7 o8 z8 P5 S1 g0 x/ \% P) | - # s* L- a! d. K6 }
- let t = f.texture;/ o( O4 C2 z# G B2 c7 x
- let g = t.graphics;" M0 M: I+ _; T* X7 {8 V. P& k
- state.running = true;) C8 C) _" ~9 k7 v: ]: @% N' D" \
- let fps = 24;
/ C7 J. u3 z9 z# y, c4 v - da(g);//绘制底图; X+ X1 ]6 P3 G. Y( Z
- t.upload();: r. s; _0 P2 A. |, l* d. @
- let k = 0;; C L& o7 f; i; [4 ?" a
- let ti = Date.now();. ]5 p; v" e" M8 P D! y+ D( ]
- let rt = 0;
( ^0 M' |4 P9 m" k7 v - smooth = (k, v) => {// 平滑变化' s' u$ q0 v# {" ]$ B
- if (v > k) return k;! C* ^, b; }* K" k! J9 `
- if (k < 0) return 0;6 z/ a v5 A ^. }& X
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 f9 t) Z0 i. J7 u - }$ Z2 z5 X/ j) D, G/ A( W
- run = () => {// 新线程
8 |6 s2 U) H$ `# T# J$ ]) c; Q - let id = Thread.currentThread().getId();
% {$ L1 B0 D$ r* l v; N0 E& l! x - print("Thread start:" + id);8 G! |2 l! ?8 a# R( C
- while (state.running) {
+ S; c5 k% {, n9 ]: M, L% O - try {; Q4 I( F3 [- g& J+ b9 S/ ~
- k += (Date.now() - ti) / 1000 * 0.2;, S0 N+ d: T, D
- ti = Date.now();
* p# r# Y) N7 A" Z. G/ r |" T, Z - if (k > 1.5) {* g7 x2 D" q c+ R5 k% [1 D, e. G
- k = 0;; ^- g6 O& p" q F( h ]8 o
- } ?( W. J5 ]8 o( L+ D: ~4 E2 }$ o
- setComp(g, 1);
. c4 {- R9 l! p' R- h8 Q - da(g);, c3 ], n( u9 Q V* R, X3 N
- let kk = smooth(1, k);//平滑切换透明度) L. F' U9 z% H% k; q
- setComp(g, kk);
$ Z& j# g( D! {$ O - db(g);, ?/ Z( I# Q* x
- t.upload();
# \- {' u' {6 j6 _+ I0 h0 L( J - ctx.setDebugInfo("rt" ,Date.now() - ti);& T( K* d9 ?/ n `
- ctx.setDebugInfo("k", k);
, d# U/ I, I* \) I0 l+ c - ctx.setDebugInfo("sm", kk);
7 ?$ k! M5 k- L! b/ B7 W: ?: J - rt = Date.now() - ti;
$ N' R: r6 x$ n - Thread.sleep(ck(rt - 1000 / fps));1 U& L7 \! i: d* R+ w
- ctx.setDebugInfo("error", 0)1 c7 q+ x- ?, V& d' v' `0 a) K
- } catch (e) {
6 h7 D. N7 U7 N# } - ctx.setDebugInfo("error", e);
% n& }9 f6 @) `1 ]- ? - }6 q4 p R; x* p
- }
* r& g2 `! y1 I9 y& W0 G - print("Thread end:" + id);% N2 S. \8 M: Q' o
- } }! h8 ?) i( X u' a4 S
- let th = new Thread(run, "qiehuan");2 f, n+ Y7 V. Q/ Z5 q% Q
- th.start();
4 j" o [& \$ j. I& [' j6 |7 f - }4 |! G4 M6 Z2 Q5 V) z: s
- S' r1 v3 K& l8 K, F( W
- function render(ctx, state, entity) {
( _. M% u& E2 ~3 \" Y/ N2 L - state.f.tick();' M* k8 M3 ]: L a: Z6 L
- }
1 W* h3 r+ [5 @2 j3 n0 Q; A4 i - " }8 I+ n' d ?( J5 i* Z& @* V
- function dispose(ctx, state, entity) {
! b: e8 L: X7 ~ J7 Q - print("Dispose");# A1 \& U2 W9 l V7 i
- state.running = false;
! k: e1 }6 X% ~" \% I - state.f.close();& c- D9 S9 P; Z& I; A
- }% B6 {. }; w& R& N# O2 W/ H
- 9 C5 v! \3 l% U, Q6 R; w
- function setComp(g, value) {
0 ~: p/ g0 g5 `' L0 l2 v( Z$ R - g.setComposite(AlphaComposite.SrcOver.derive(value));2 o: R( }5 q1 \1 X
- }
复制代码
! ^8 B/ z* T" o7 Y- O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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