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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。* u" w4 c. N/ E, ~4 y
- importPackage (java.lang);
, h' T$ ^$ x9 L$ S- Y3 \5 A - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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6 ] E$ M5 R" q& _8 z; J" c- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( f9 y: A+ Y' ~1 g% R
- 7 e% P E. l; V, W6 A3 v9 v% N$ n9 f( H
- function getW(str, font) {/ S3 |5 o" o [8 H
- let frc = Resources.getFontRenderContext();# ?1 \0 K, J/ J' Y! q0 e
- bounds = font.getStringBounds(str, frc);
1 e7 U8 V8 z2 Z) S* i' h - return Math.ceil(bounds.getWidth());
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0 _! S* X# A" K7 U2 V& H! s+ T- da = (g) => {//底图绘制3 o# ?3 S) b) p ?5 A$ c0 p
- g.setColor(Color.BLACK);3 C, f- F8 f I$ m% g4 q
- g.fillRect(0, 0, 400, 400);
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- % k* m+ {; q" S7 ^
- db = (g) => {//上层绘制# T o0 x5 O/ W' d8 A
- g.setColor(Color.WHITE);
5 A2 P. ]* U$ ], i1 I9 f5 V( R) [4 t# a - g.fillRect(0, 0, 400, 400);
6 i2 p5 p, v4 B - g.setColor(Color.RED);
+ W. j7 w* q- o8 `# K2 p - g.setFont(font0);
8 ?, L$ R1 p! S4 X5 z# d% a- x, `; ]7 h - let str = "晴纱是男娘";
% x) D" Z( p6 @( A% R+ I! C - let ww = 400;
# b# E: G1 y6 x; Q5 { - let w = getW(str, font0);
$ S* u A" h4 c r8 s - g.drawString(str, ww / 2 - w / 2, 200);
q8 u `! y/ i( o" I0 H4 n - }
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+ S6 l0 t6 l+ |6 z$ T- const mat = new Matrices(); E$ a8 X% l5 O& X: O! z6 b
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {5 w/ K+ n; O' { x; C3 Y. ^3 O
- let info = {! g( Z3 {' [' Z2 f+ X
- ctx: ctx,
; C% m! E7 v& v - isTrain: false,
% R* g/ Z1 u. U0 y Q$ W, S! ^& G - matrices: [mat],1 c# {5 s3 h4 m, L& O/ Z" ^ V
- texture: [400, 400],
# H4 t" B2 R# g3 C - model: {. ^$ w; M. N2 D6 h+ l- m
- renderType: "light",- J; j* w6 a" {9 w8 T1 e4 W
- size: [1, 1],
# |" i" _& s6 e3 I) _ - uvSize: [1, 1]
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- }
' @! H* f! S; h& {0 J5 Y - let f = new Face(info);* i3 q! m2 z, a- h8 W$ v7 d
- state.f = f;/ ?; K% O' C7 y/ t8 S
- ( s& o8 h. H% [' E w" t
- let t = f.texture;( P, P, f. G1 c! c+ P9 ~
- let g = t.graphics;
( j. M% ^# S# G8 p& R - state.running = true;
9 C( ?0 g; c9 l+ x; F7 J - let fps = 24;
# u) C1 s. R9 ^ - da(g);//绘制底图
2 T( p$ @3 E8 `0 N6 @- Y# r - t.upload();6 k% ]6 V. t ?$ \' A$ H
- let k = 0;
$ F! [7 ?5 d, s- i - let ti = Date.now();& K+ P* [" b% d9 M+ B& C' Q
- let rt = 0;
: z8 G8 z# F5 d7 L9 A }0 r; z - smooth = (k, v) => {// 平滑变化
' ?, ~6 q- K! ]+ q. e - if (v > k) return k;
. c; T8 {) W( c3 _# { - if (k < 0) return 0;" Y: Q D" s7 T4 ]; S$ |; @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 \; D4 U! @8 |( [( f! o- c) H0 Y
- }& S6 y2 x1 Y3 P! y. a' A
- run = () => {// 新线程0 J7 M, Q$ Z' W( |5 f2 S# S- F
- let id = Thread.currentThread().getId();
/ S: ^" N. m: W3 X( h - print("Thread start:" + id);+ k( ~4 w5 P6 c5 X* L; \2 c
- while (state.running) {
A- d4 b! j; C1 E3 D6 w- b% C - try {, k( K6 M9 M! c9 U: ?7 W
- k += (Date.now() - ti) / 1000 * 0.2;' H1 u4 ?! g# b
- ti = Date.now();
$ P1 |( m! l" I- N9 _, e, z - if (k > 1.5) {! [$ J- U2 J' x: r9 d
- k = 0;& T' J0 {7 u; l
- }
# h) \- p& B: L7 ]8 j - setComp(g, 1); e# t6 j' W" M9 K8 t, }
- da(g);
+ B& W" `; L* ^ - let kk = smooth(1, k);//平滑切换透明度! }7 i4 R. [9 Y4 Q9 K
- setComp(g, kk);
) k4 T1 A# A5 \ - db(g);
8 C4 \; e; k6 [! s! H - t.upload();
& g& P! M# B8 W/ x* ?. Q/ U - ctx.setDebugInfo("rt" ,Date.now() - ti);) u3 ^$ P& M2 M" y+ S% O
- ctx.setDebugInfo("k", k);
0 _ H1 t0 X# ^- Z$ o+ X: h: x - ctx.setDebugInfo("sm", kk);
$ [; j, W/ X& T3 ?3 p - rt = Date.now() - ti;" q. l+ i/ G7 ^+ x% U$ ~1 p
- Thread.sleep(ck(rt - 1000 / fps));# N% M8 t* ~$ Y9 S8 ?1 W' P" V" I- d
- ctx.setDebugInfo("error", 0)+ b% w3 u6 @1 h8 n8 {
- } catch (e) {
2 {& b8 Z) i# {# d5 { - ctx.setDebugInfo("error", e);
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- }) c) E! h w6 @
- print("Thread end:" + id);6 B) |% u1 h7 r" Z7 r
- }
, ~. q9 I( \6 M/ o. W7 n o5 f7 O - let th = new Thread(run, "qiehuan");
0 C* v5 S& A( C+ N. v0 d! } - th.start();
Q, b: G' t4 f' D; ~ - }0 p0 `9 @7 o8 t' {
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- function render(ctx, state, entity) {
( Y+ x& \( b' ~7 T- j" u* e - state.f.tick();
+ R7 d: x: u! U/ `+ y - }. @$ O7 }: m0 |* ^
) j) c' B' k1 R- function dispose(ctx, state, entity) {- `+ E4 J @4 U5 F1 s
- print("Dispose");
: a. X9 e! T6 U1 \" B/ P - state.running = false;
8 _# ?, E+ T; q# y' l+ j - state.f.close();
+ M& Q+ P. D/ g4 ] - }
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- function setComp(g, value) {
( w; I* M& A$ s$ L" ~. E' ^1 \ - g.setComposite(AlphaComposite.SrcOver.derive(value));" F- y9 ^; n& |4 N7 m( s. I
- }
复制代码
' Y! b6 L, j& c6 c F9 I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。. C! N. o0 Q$ L5 V! b& r
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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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