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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。
( D6 z e- l3 M0 P$ [4 q- importPackage (java.lang);- q- Q5 Z- y# n& }# m3 j
- importPackage (java.awt);. q* X7 _$ L4 Q. x$ E
/ x3 ^) R3 b( b$ ^; b, i- o' _- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! s2 ^. X2 T, \% l& B- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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( U0 z$ u' K8 r. _' [4 ~+ i- function getW(str, font) {
9 Z% e1 J( r+ v% }9 J6 e$ Y; t0 r8 N: U - let frc = Resources.getFontRenderContext(); L& A( @7 K" ^
- bounds = font.getStringBounds(str, frc); `& D% M' V0 w! W" q
- return Math.ceil(bounds.getWidth());
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- , L/ q/ F" d0 Z2 X) \
- da = (g) => {//底图绘制
2 q, p% J1 A# Z& U' B$ I& G - g.setColor(Color.BLACK);
% ]) b$ a" K$ w - g.fillRect(0, 0, 400, 400);9 d: R) T+ x" ?4 d* F+ T+ u. H4 H) c2 i
- }
8 |2 E1 k7 J9 v: o* o$ \! w - , g- w( U+ Y! e
- db = (g) => {//上层绘制9 ^& r4 i2 I1 u
- g.setColor(Color.WHITE);
3 A: {7 y' U. B, u( }4 o/ c2 O - g.fillRect(0, 0, 400, 400);* U8 {4 z8 h+ ^, T$ C6 L
- g.setColor(Color.RED);
1 i( J' M- f2 l+ P - g.setFont(font0);
, `/ o. w7 m% O2 L) ~% Y - let str = "晴纱是男娘";! S! J( ?# g, h5 W5 h
- let ww = 400;. c T. q0 h# m; b
- let w = getW(str, font0);6 Q6 L" w1 l8 t! u/ j; V
- g.drawString(str, ww / 2 - w / 2, 200);( D$ x1 _& s. F( Q, T
- }
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- const mat = new Matrices();
# A& a/ U0 `9 E# z2 Q1 X - mat.translate(0, 0.5, 0);! |! V5 N3 s! r, Z4 K; z& h; i( k0 y
- , W1 m5 \- g) w3 K
- function create(ctx, state, entity) {
& [: {3 M( r! |! d7 O - let info = {
f$ |8 f$ ?( r" n - ctx: ctx,
/ m @0 m8 k- w( Y$ S/ b$ m; e( M - isTrain: false,. Z, |# B1 ?7 P2 j! `8 L
- matrices: [mat],2 f" i- D; c$ `7 Q, u. ~) v# o* ?& c
- texture: [400, 400],
2 v, M+ u: a# {: P" Q - model: {; c) X& M6 F" N8 z8 c5 @* ^
- renderType: "light",. H. c9 j" V* z2 e% O
- size: [1, 1],4 k! g+ a5 S" J, [( _! g: M9 R3 p
- uvSize: [1, 1]" I& U n+ r! R! G$ w8 n, N
- }
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- let f = new Face(info);9 j, l. m/ M! t% ^# s$ z
- state.f = f;
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- let t = f.texture;2 X: A; u* A$ Y% D G- @! u
- let g = t.graphics;
0 X' b4 s( @* N2 F3 T - state.running = true;
& M2 M4 ~( l V+ R D! I# a - let fps = 24;
% l1 s; o- e9 k0 T - da(g);//绘制底图, @ N. _, e+ w, y' L
- t.upload();
( A: H, Q6 d1 @' A8 f5 s: A5 E+ t - let k = 0;
* a1 k/ e5 o2 Y# q - let ti = Date.now();
, _0 B$ @1 V/ K, [) V5 n( O. x - let rt = 0;
# R$ Y3 I0 P0 x$ m - smooth = (k, v) => {// 平滑变化7 v/ z" a8 K K7 ~
- if (v > k) return k;
( h' f U% {, t% Q3 T# c - if (k < 0) return 0;
8 X9 H2 N3 A/ c' _9 _ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' t' `; h" K5 h, ^
- }
# _2 z4 G6 K* a - run = () => {// 新线程# B O- o. C7 I! k
- let id = Thread.currentThread().getId();0 P" i/ g; H$ a; t/ \( Y2 q( G" f
- print("Thread start:" + id);
$ h! Y9 U% D; q3 h - while (state.running) {
. C7 g. c; h- j% o5 r# H: G - try {3 ?+ X& t2 z" w- h
- k += (Date.now() - ti) / 1000 * 0.2;9 c% Q" y- `) d" ^& l4 \
- ti = Date.now();) p7 \5 x' y. W3 _. b6 j- `9 o
- if (k > 1.5) {8 P& A7 M$ f F9 K" {8 A
- k = 0;$ L: W; D9 H% g2 E J
- }4 k6 t9 z' X8 @- b/ X. v
- setComp(g, 1);4 F A& ]" G& `/ d3 K
- da(g);- {, ^8 f# E! [6 Z; }3 y9 l
- let kk = smooth(1, k);//平滑切换透明度1 P. G) B* x( s, S
- setComp(g, kk);* Z% m. f" P- h) }! B
- db(g);& ~* w! d: h3 d! D
- t.upload(); c1 b/ F; o0 w' x; S* j' ~8 P
- ctx.setDebugInfo("rt" ,Date.now() - ti);
7 M1 u# v) w7 b( ? - ctx.setDebugInfo("k", k);
h4 S* b2 E9 j% S! f7 I8 o; s - ctx.setDebugInfo("sm", kk);
! h5 y+ ], \2 H/ [3 a - rt = Date.now() - ti;) r) s9 G3 E# `% i
- Thread.sleep(ck(rt - 1000 / fps));
1 E3 n" C7 ^ U3 M9 w# J) F4 J - ctx.setDebugInfo("error", 0)
! G4 @7 e' ~- w3 G$ e! I) \ - } catch (e) {
5 v) l5 X( I$ ~6 \! g' x - ctx.setDebugInfo("error", e);
7 T5 T K& i; }/ Y, D4 W - }
; v! [% K. w$ f: M1 t: T$ T& ? - }2 E& ?( w2 @/ ~8 P
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");/ y- ^( ?3 j/ o" V
- th.start();# t/ _9 u: r. ]5 O( }4 S
- }
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- function render(ctx, state, entity) {
( O; y5 g$ G6 M) b5 a - state.f.tick();' {) ~* T3 M- N% L0 s" A9 }
- }
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- function dispose(ctx, state, entity) {
; C8 R4 m4 O* ?, Q1 u* d - print("Dispose");; O |( W4 K; j8 F! a3 B
- state.running = false;4 T; C- S5 D$ o
- state.f.close();
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" G! v+ V8 ]& k w" d5 q- function setComp(g, value) {
4 e0 x, R: D# l7 _% | ]2 t - g.setComposite(AlphaComposite.SrcOver.derive(value));" u2 a4 M$ c' z% D0 k
- }
复制代码
7 ?. c( {5 u P: W2 k, a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。* I" l% K* R# a4 y e$ N" X
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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)9 s3 E+ }8 g: f- B' s
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