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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。
: b9 g! V/ _, _/ W* W3 h) F- importPackage (java.lang);
3 Y U7 ^2 k& Q) O @5 \4 h - importPackage (java.awt);& _0 A% K* \9 d( p" }; J
! ^ L: o- Z1 f- include(Resources.id("mtrsteamloco:library/code/face.js"));5 g. m! I$ p7 j- B& v) h( p
- 0 T$ Q/ d+ `1 ^ `
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; ` m& }9 ?, L" s1 L
* A1 G& Q H, Z! N* ~# H- function getW(str, font) {
& X% E- ?$ k! v6 m- A( T) K - let frc = Resources.getFontRenderContext();$ F4 l2 D6 `4 o, Y0 \& {
- bounds = font.getStringBounds(str, frc);! L5 ]. D3 {6 e( \- L9 m8 W: s
- return Math.ceil(bounds.getWidth());/ e+ c6 \1 a8 q2 Q6 O$ W
- }! I) b. ?; E8 W& v: r% T
- + ?. _$ D( G* c9 i$ Z
- da = (g) => {//底图绘制' K0 |* z& v+ ^3 e/ q% w
- g.setColor(Color.BLACK);
; R7 {( b$ n8 U5 ]7 c+ H% _7 Y' |" e7 p - g.fillRect(0, 0, 400, 400);
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- 1 v+ h5 G! b& u! e: \' J# {0 a
- db = (g) => {//上层绘制
( F" F* y; l* }8 t4 g - g.setColor(Color.WHITE);
`4 ]$ ^! _ {& b% h - g.fillRect(0, 0, 400, 400);
4 O* X) m% j1 @7 J7 f5 U - g.setColor(Color.RED);4 U9 v9 K6 Y3 h6 @. [+ U1 I
- g.setFont(font0);9 w5 Q& h; \9 Z$ c$ _) s: E
- let str = "晴纱是男娘";( O( u% e0 }% x3 `% N5 l' c' Y
- let ww = 400;* Z% F0 C: e! u0 ], f* P
- let w = getW(str, font0);) K, I+ x4 {; w) E0 G K; B2 C
- g.drawString(str, ww / 2 - w / 2, 200);
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9 W/ H/ {! |7 V" ?9 p6 m% G- const mat = new Matrices();& ~" R$ H- `8 Q2 T& _; ~
- mat.translate(0, 0.5, 0);& @7 g& {8 X6 D/ X- |5 K1 n2 Q
- 5 ?: ]4 b- a' y$ m; P+ J" S; m
- function create(ctx, state, entity) {
1 T' h4 }8 M* ^0 D) I; j E" F/ c - let info = {
5 w- X8 r, V3 m2 V' y; p - ctx: ctx,# ?/ q T6 j) C! x$ h
- isTrain: false, F) }. S9 Z, i6 d
- matrices: [mat],; X9 D% N7 M8 R$ u6 S* s# y
- texture: [400, 400],$ _" l' f8 l. L6 b* C
- model: {- Y+ l3 u3 j9 g. J
- renderType: "light",# F q! X6 Q9 \9 K
- size: [1, 1],
: R9 C7 Y a6 \2 @7 c: Z; F9 } - uvSize: [1, 1]
% i5 F' h4 n1 ^, F - }
/ r: m. _1 ], V+ p - }
* l, Y# J6 d8 z9 n4 r - let f = new Face(info);
0 y( V5 _4 _1 Z5 N: z# G/ x( y y- B - state.f = f;- s `- j* N: v+ ~3 G* ^
- 7 A* B, I: o& R
- let t = f.texture;" ]7 P4 h" T5 X! m2 \: n
- let g = t.graphics;/ i f9 D0 O5 N7 z! ^
- state.running = true;
% e6 o- E- H9 t+ a; M: z2 X - let fps = 24;, Z' K' Q) S$ G8 A
- da(g);//绘制底图
4 }' v) c# `! e! Z# u9 T; e5 O - t.upload();
+ D: w& P5 C$ x" D/ B4 c - let k = 0;) g# ~8 N6 G. m* p. R0 [* M
- let ti = Date.now();( G& i+ U# m2 d! n0 y1 y! R1 J
- let rt = 0;
/ b6 [* o+ E V) y2 | - smooth = (k, v) => {// 平滑变化
9 Y# |& ~" R% o* o2 [4 t - if (v > k) return k;
$ R; v1 i. O; M0 d$ O6 E% K - if (k < 0) return 0;
; \4 d% ]9 B( Z/ g: J3 f9 V6 O; j' M - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
4 U/ Q6 @0 K2 N" z% G5 D - }
3 x3 K- s$ H! Q/ e5 X4 q% ^ - run = () => {// 新线程
4 O2 i1 R$ ]' _7 H - let id = Thread.currentThread().getId();/ }) p: k/ b W* g
- print("Thread start:" + id);
8 u6 l: A# A- I/ W8 O8 P( @; v - while (state.running) {$ C# ^' l/ E0 Z
- try {
* I; ~% \* E: _, k' F+ ]0 H - k += (Date.now() - ti) / 1000 * 0.2;
4 i5 K6 }( t3 M- f# B - ti = Date.now();8 D) \3 l7 ]7 W* B/ z% P# _
- if (k > 1.5) { q: N8 s6 H8 ?- r
- k = 0;
% v# F; j, h; |9 b0 J1 t - }
! }: c7 {6 G: A: ^' i1 p9 A9 i - setComp(g, 1);
8 s* o8 z' S q) B- Y - da(g);7 K' d; A0 g! R
- let kk = smooth(1, k);//平滑切换透明度! M" v1 j6 Q% u' ] ~
- setComp(g, kk);
$ R7 w& B3 w" ~* V - db(g);
" G. m! N+ h. N# `0 G$ G - t.upload();
) |* q: \# Q) q7 e - ctx.setDebugInfo("rt" ,Date.now() - ti);
3 }, [# W$ i% H1 M5 q+ j; l/ k - ctx.setDebugInfo("k", k);0 n1 M1 n$ O# C4 G2 }4 F( [8 t
- ctx.setDebugInfo("sm", kk);
. E O) z9 V( v! ^3 f, B - rt = Date.now() - ti;
+ f- f0 J. p4 d - Thread.sleep(ck(rt - 1000 / fps));2 B1 Z0 M. x/ Z; Y
- ctx.setDebugInfo("error", 0)
$ \: {6 F7 N+ d$ k4 A - } catch (e) {' I' g9 [" L% j3 \* G& G
- ctx.setDebugInfo("error", e);
1 n9 J2 ~3 V+ N. L/ [ - }
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- print("Thread end:" + id);: O* j+ m' G1 R+ \$ {
- }
9 N9 H* f+ r8 f1 Y! b& E - let th = new Thread(run, "qiehuan");% C- x& S# F3 y
- th.start();
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- , ` v6 N; o( R+ N- |9 ]$ Q
- function render(ctx, state, entity) {
9 u! J; u. m1 y; c( Z0 { - state.f.tick();5 d; \6 [) E$ v- R. Q
- }
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- function dispose(ctx, state, entity) {
7 z) S5 q8 c0 z: |/ _7 A - print("Dispose");
6 y- r. w& a: J# w - state.running = false;% }7 r B( l2 ^5 P, I/ z6 f% Y
- state.f.close();; l! ~. O) G+ P. T$ i7 w
- }: O0 H7 G3 a. H4 N; T+ ]7 A
- - \/ \; _% ~6 ]& m
- function setComp(g, value) {
/ I8 \' z0 Z+ M - g.setComposite(AlphaComposite.SrcOver.derive(value));
$ `5 x& [1 e% A- j6 @$ |! x - }
复制代码
( {3 ^0 b. F: P9 v( r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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3 l) F) N0 u5 ~* t- D: ]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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