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n3 _( ~2 e+ ^2 s" e- c- c. w' y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。( F& I% \/ ]: O* |( `: V, ^1 T ^
- importPackage (java.lang);
. I0 [/ A8 D. ` Y6 _ - importPackage (java.awt);
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{5 a1 G) W3 @, c( u8 l! M8 t ]- include(Resources.id("mtrsteamloco:library/code/face.js"));* \ n {6 o3 N. R
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
0 l' `/ U+ g' V: R - let frc = Resources.getFontRenderContext();
: X3 a* }9 g1 ?0 _$ P" r - bounds = font.getStringBounds(str, frc);/ X, s: a" U+ p; T
- return Math.ceil(bounds.getWidth());( h* a3 T/ D _7 e$ |2 v
- }
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- da = (g) => {//底图绘制
7 o. y) A# J c6 m* G# D0 L3 Z - g.setColor(Color.BLACK);& e6 h: Y5 X; w% f+ X" V3 d
- g.fillRect(0, 0, 400, 400);0 A* F- |, `/ C- t
- }
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- db = (g) => {//上层绘制3 S8 K5 A# f, K8 I
- g.setColor(Color.WHITE);1 s2 {. |! ~, h$ s; t1 Q6 t
- g.fillRect(0, 0, 400, 400);
# Q- P8 C& q b8 F5 G - g.setColor(Color.RED);
l8 J# v& z+ d9 X! ~" ~7 r# F - g.setFont(font0);9 \. `( R/ _1 j5 j$ D
- let str = "晴纱是男娘";
3 R3 g7 u7 W4 `( r - let ww = 400;
# i2 |" N) X& \ - let w = getW(str, font0);$ S# |& S l; r0 j9 S( B8 i; s/ I
- g.drawString(str, ww / 2 - w / 2, 200);
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" [1 E' h8 s7 l C% ^0 }; d- const mat = new Matrices();1 ]- \9 Q/ G7 ~2 [' Y& z; _3 W
- mat.translate(0, 0.5, 0);6 X! j7 |0 d+ v. w1 s9 ~! X4 B" l
* ~) w$ T( ~- X" ~- function create(ctx, state, entity) {
4 j4 n% g$ {+ T8 E" B - let info = {
# D0 ~8 v* z5 f9 ]4 \8 _5 _ - ctx: ctx,
" w7 l2 m* r- `1 _ - isTrain: false,+ f4 Z3 x4 h; ]3 w4 ]& V
- matrices: [mat],
/ h. ?/ e4 \# v: F - texture: [400, 400],
8 {) P4 G8 J b3 R5 d& B, ] - model: {
1 L- q$ U2 x, A( T9 a - renderType: "light",, I+ g4 L0 {$ T) g; J) w
- size: [1, 1],# {8 B8 M! P) V* ?9 e D& |' `
- uvSize: [1, 1]1 O+ W% i0 S2 C4 E
- }
& D% T% {8 p# R! h& R. E5 V' w' M - }
* Y& k" f; r7 ]4 e& y7 j - let f = new Face(info);: @5 ~ a3 \. Y5 Y" E# Q" u
- state.f = f;
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- let t = f.texture;
% i0 [6 e2 B$ k5 h4 D - let g = t.graphics;
8 w2 a5 R3 U# H+ _% O: `# Y r1 u - state.running = true;/ A. d# |: N( e0 K, O
- let fps = 24;
. U: }. z) W( V1 H) a% s - da(g);//绘制底图6 l0 U( |, Z! p7 x; o W
- t.upload();3 x. K/ {2 E9 D! ]& x# g1 L* e5 o
- let k = 0;
# n) {7 P' P8 G" p7 _' Z$ H - let ti = Date.now();
1 e' D0 p4 e M3 U( z - let rt = 0;
\4 v0 R& P/ q. |7 b6 \" G- y. Y - smooth = (k, v) => {// 平滑变化
' `0 Y8 ^0 I* z7 }; t6 R - if (v > k) return k;
+ l% z! j. H) J4 h. W2 Q - if (k < 0) return 0;& s7 ?$ T; h4 C. \9 r c" I
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# x5 W' f6 {6 _1 Y3 w
- }( x0 D1 x7 @ B1 P) t' `
- run = () => {// 新线程
5 ?4 ]% s' Y' y7 S; X - let id = Thread.currentThread().getId();0 O$ m! i# O% l7 R$ o
- print("Thread start:" + id);
) _3 F/ X& m' \2 r- x - while (state.running) {; I5 `6 Y6 \# w0 v1 c9 S6 i2 ^3 |
- try {; b, S" Q" C9 G
- k += (Date.now() - ti) / 1000 * 0.2;- P2 K g6 T: b% v
- ti = Date.now();# Q# q) |5 p [
- if (k > 1.5) {) R, M! |' a, d' f8 t4 ? h) w4 w
- k = 0;
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- setComp(g, 1);
0 C( _& C/ S; ? - da(g);
, q5 ?' P( N7 C2 h8 ~ - let kk = smooth(1, k);//平滑切换透明度8 t' s0 Z. d% ^0 g% F7 ^6 K
- setComp(g, kk);
3 u+ a# q$ X7 S; o - db(g);
$ f9 c/ s* |1 v/ n& |4 z* P - t.upload();
; C4 d6 V: X3 i" _0 B - ctx.setDebugInfo("rt" ,Date.now() - ti);
* h: h/ E1 e: _* X5 v6 h. D - ctx.setDebugInfo("k", k);
9 G8 Z \9 H# A9 @ - ctx.setDebugInfo("sm", kk);* k! Z$ r* u1 m c" Z" `
- rt = Date.now() - ti;2 K1 ]- O% f: F. X/ F
- Thread.sleep(ck(rt - 1000 / fps));- a( D" r# c+ J5 j
- ctx.setDebugInfo("error", 0): z1 {* {( w( f
- } catch (e) {2 j2 u. v2 h* D/ {0 _$ U. w
- ctx.setDebugInfo("error", e);: ?" g( Y+ n/ |3 h. K9 m
- }, q+ A- b0 H! G0 m0 \2 p
- }, J4 |% s& ~. Q/ G+ q; u
- print("Thread end:" + id);8 ]4 _2 P" T- Y& s. t9 n+ o2 r
- }
% q" h) G! w+ l) t: g - let th = new Thread(run, "qiehuan");
% N( N5 E* Q! }1 |! b - th.start();
, I6 u" }# c! k) ?1 _ s% J" q* r - }
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- function render(ctx, state, entity) {
6 K7 i# a% a; G) }6 w - state.f.tick();2 J3 X4 W1 V: U2 k3 Z R- }2 l7 K: G
- }, N( v* [' q; K, j, V! I, C! P, q
; I# }, u7 G5 W5 f. S9 p: R- function dispose(ctx, state, entity) {* [5 @4 L/ Q L2 X- U+ k* Z* s
- print("Dispose");- M, h# X$ m: [3 |
- state.running = false;
: j) j3 t1 _4 S - state.f.close();: H: [1 O( P0 t* _
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5 a2 c' e9 y1 d( k: R- function setComp(g, value) {
( O* [7 r" z# I3 l - g.setComposite(AlphaComposite.SrcOver.derive(value));% Z0 {) k# ]1 p5 J6 i" Q$ p5 i
- }
复制代码 " B# E0 O- L5 V! |' o8 l
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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. C9 G3 Q* e: _) e, ?3 l3 C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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