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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 I! l0 x4 B9 e' B) I8 E
- importPackage (java.lang);
+ ^" L- j9 V5 z& X# U - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
" J- b+ P9 g! a0 A4 \: Q8 U - ( z% \( b. F' S! @
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% P) e& o9 X( a) l! H6 n1 I
b# A. l. B i. l2 W/ y- function getW(str, font) {* w8 p: v5 l5 ~; y, A+ V t: \
- let frc = Resources.getFontRenderContext();; Q- [% q5 a1 I1 g7 t# f5 C8 X
- bounds = font.getStringBounds(str, frc);
% n. ^, W8 R L - return Math.ceil(bounds.getWidth());5 H( o# N! t( W
- }
% t0 u: R* c: A% ]- M0 |' ^0 n0 g
8 p* F* h( |6 \% Z- da = (g) => {//底图绘制" l) m9 Z7 A# U7 C; G
- g.setColor(Color.BLACK);% h9 f$ i9 f6 U0 y
- g.fillRect(0, 0, 400, 400);0 ?: X' r2 Q$ Y h
- }3 E \! b2 T( v" [6 o- E
- 1 h- |; D X" ~
- db = (g) => {//上层绘制+ b) b! e6 Q/ @
- g.setColor(Color.WHITE);
5 p! V; J* b/ M5 i0 n$ X/ v - g.fillRect(0, 0, 400, 400);- c* k' K8 q2 h' [+ z# {) r
- g.setColor(Color.RED);
7 f- o% ?) F9 Q - g.setFont(font0);
& C* e7 A( m8 Z2 S, u# r - let str = "晴纱是男娘";
; k6 q, @; S- s" r: e& F, l - let ww = 400;% |+ A, `9 E4 x; V$ e' `+ j
- let w = getW(str, font0);
# [7 ^+ u Z* g0 j - g.drawString(str, ww / 2 - w / 2, 200);
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+ V' {, `6 n8 d/ s: `7 Q4 B" W, y- const mat = new Matrices();7 _* ` | W2 v5 Q! A
- mat.translate(0, 0.5, 0);
; H$ h! h- ~" z
4 u6 j% Z. ~# }- function create(ctx, state, entity) {! b3 _+ \/ e! d" z: N( B
- let info = {# i9 g6 l+ ~7 Q( R
- ctx: ctx,2 I M- }' j! o! ?
- isTrain: false,; Y2 S- w" V* k( {0 }6 |" _/ x6 N: O
- matrices: [mat],
# w x3 D n4 u - texture: [400, 400],
; y* @4 y2 d9 _% t- Z) W - model: {' {" n' K6 b6 m3 u
- renderType: "light",1 E* A/ E- `. H6 c
- size: [1, 1],0 M5 d5 a! t0 e/ q- ], k1 x
- uvSize: [1, 1]5 Y. O) M2 ]' l3 l" i8 }
- }. ]! ~: {$ N) q* ]3 x; Y/ u
- }$ f" z6 p. W9 Y8 l4 E, `
- let f = new Face(info);3 S+ E5 H/ Y0 B7 p2 `
- state.f = f;4 ]% M7 l" r' k2 D% o
- b# x6 G W% R. W- let t = f.texture;/ w' B d, @0 f' p' {+ `2 A) F0 {
- let g = t.graphics;
( H! b s- e6 P( M- S+ f1 N - state.running = true;) _$ [# i/ C3 { k) W
- let fps = 24;. B' [1 g; h# O5 f6 S+ e
- da(g);//绘制底图( v" w0 t) J2 S( X) `, c% @# y
- t.upload();
. A' g4 A+ O8 |# s - let k = 0;
7 I$ m' h& [% q% C% B0 `1 N - let ti = Date.now();' n' D0 O1 `' W% L9 @
- let rt = 0;
7 p$ p8 A9 Q, x3 _ V7 \, ~, B; G - smooth = (k, v) => {// 平滑变化
; h" }( T/ b/ e) J# }; O - if (v > k) return k;
u2 j0 `. K. r; Y; C - if (k < 0) return 0;3 A8 y" Z# _& M, f; l1 U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 ^5 b% P7 I% Q* A# t- ~
- }, c' p* `# l5 t
- run = () => {// 新线程
5 ~5 q8 W, B% D9 j% F5 t, z, n% h/ R4 t - let id = Thread.currentThread().getId();/ E: t( @2 m* {& s
- print("Thread start:" + id);. R! @) Q, Z% {- x) _
- while (state.running) {0 K7 T! N+ Y4 W# C2 }. A7 Q+ |
- try {4 n9 L) P. k3 }8 t2 q. s' t
- k += (Date.now() - ti) / 1000 * 0.2;
" V- p4 @" d/ G1 w Z' [2 O - ti = Date.now();9 F8 p* t: D) G( c
- if (k > 1.5) {
3 w/ ]' H+ @* i - k = 0;+ J9 b: R+ u/ e( [3 R
- }
1 B& @- R5 E: a$ ]" G! r7 `" n - setComp(g, 1);
- I2 [/ V3 ]: o- f - da(g);
( i% W5 Y) H( f) e1 P/ p - let kk = smooth(1, k);//平滑切换透明度* |6 v: |2 i* H2 W9 \
- setComp(g, kk);
& M# i, z L% y( S - db(g);# U- Z+ x" N m1 \# [ n" U
- t.upload();4 b( [! z- t4 y$ g0 `' }
- ctx.setDebugInfo("rt" ,Date.now() - ti);1 `2 @4 w7 v) q! ]
- ctx.setDebugInfo("k", k);
4 n( ~+ R' S3 ]7 ~ - ctx.setDebugInfo("sm", kk);4 n, f* D. t! P$ [$ ~5 X4 f2 d
- rt = Date.now() - ti;
9 a @1 v; |9 F. A3 X# l. {+ P$ ? - Thread.sleep(ck(rt - 1000 / fps));
1 K% P6 J, \# c: N - ctx.setDebugInfo("error", 0)
" `+ j4 Z$ Y! \$ q8 o - } catch (e) {
& U- ?/ C# ^6 w" u9 @2 Y" a% ~/ t! u8 g - ctx.setDebugInfo("error", e);. k; m5 E: L; h- |6 V
- }
3 P3 h( q( \5 K* k- { - }& n! X2 T8 D/ W
- print("Thread end:" + id);
~: J- s# X* l. f6 I4 p0 U/ ] - }$ S4 v* s6 J; d: D2 z. q9 u Q6 T q
- let th = new Thread(run, "qiehuan");" ?4 ^+ w+ C) x/ w% e8 i) B! C9 A
- th.start();! o G0 J+ M+ T& \' C
- }$ o% z- I* Y. y! H7 r
, I8 g" [6 I8 x1 s6 @; f O$ v- function render(ctx, state, entity) {
8 w! b3 a- R4 s/ D - state.f.tick();
' B0 J/ I5 Y( P" ?* g% F - }8 D2 \2 N+ s& |5 X$ P8 k {
- # w; l+ ]1 O) ]
- function dispose(ctx, state, entity) {
. s \0 z4 C3 v - print("Dispose");
7 K3 p) o) f# O7 S" p - state.running = false;
- [/ T3 ^; a' b2 T; P- `% q: | - state.f.close();# s* y5 F9 l# x1 r( `$ C# {
- }
2 \4 }; H7 ^- b/ o
/ p4 M2 H) K& R2 l Q- function setComp(g, value) {
: w' E4 y0 K+ d$ U - g.setComposite(AlphaComposite.SrcOver.derive(value));
8 s; d& T) A+ {+ j$ b - }
复制代码 , O) y# A) C7 L3 V
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。$ S. A$ p# h$ f+ ]0 Z$ x1 F- E
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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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