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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。
' b5 A6 [" m0 M+ k* c' P- importPackage (java.lang);
: A! C" h8 r( a9 d) P% Q& { - importPackage (java.awt);+ {2 T5 {/ w8 u
- 9 T+ Z0 B6 N8 x5 {$ ?: A1 ~5 _
- include(Resources.id("mtrsteamloco:library/code/face.js"));
' Q+ |% L" N: J% r
) R" ^2 \ ?' Y5 U+ W- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
% c. }, {, t+ } - 8 [% u% Q1 Y2 {" Y% s0 r% x* l' b- U% J
- function getW(str, font) {9 G8 A5 O' C+ Z
- let frc = Resources.getFontRenderContext();
{6 ~/ r: t" h, q6 S& x4 H% X$ Z - bounds = font.getStringBounds(str, frc);
9 O0 |- t: f8 ^' q) @' f2 M7 t - return Math.ceil(bounds.getWidth());
2 t" `" S# M% B; U4 y - }& ^6 u. r% A( }7 @
0 g) y* u$ S* {- da = (g) => {//底图绘制( Q9 H1 x4 i$ u1 w# w+ w
- g.setColor(Color.BLACK);9 {4 ]2 ^. x- k" O- ?8 l6 @3 p9 v( C
- g.fillRect(0, 0, 400, 400);
1 ?1 x, t# C8 `2 ?, r" i! l - }5 V" Y0 ~2 p+ y l1 y+ y! h# K: }
# u! F/ C: Z, h9 [' K- db = (g) => {//上层绘制: h5 R3 ]5 b7 [1 n h/ c* C% B
- g.setColor(Color.WHITE);% t. X6 ~: b6 |
- g.fillRect(0, 0, 400, 400);8 F. F# w3 P9 j: x; ?
- g.setColor(Color.RED);
$ h5 m+ s3 W* D% g - g.setFont(font0);
0 d3 w2 ?( l8 w# H4 f/ n3 x, l - let str = "晴纱是男娘";
Z, t) |! H I; q - let ww = 400;; s p% `- [- i: h/ F
- let w = getW(str, font0);8 r4 q% |" c# `* |& W
- g.drawString(str, ww / 2 - w / 2, 200);
/ y# m5 ^7 c: L% F& d# h - }0 m3 m% J( f0 C, g' m
- 8 b) E- y6 ~- i* G5 @8 x* _
- const mat = new Matrices();. b- l2 _. x! n. C- D
- mat.translate(0, 0.5, 0);
; @" h' n [: _ q/ u& e' E
- x% a+ c% \" l$ x3 w( S- function create(ctx, state, entity) {# B3 M& H0 G/ E" ~7 r( C0 L3 X) A
- let info = {- `8 Q- `# \$ n; m2 d( B$ X
- ctx: ctx,9 L; e! ]$ A; U
- isTrain: false, U; t6 F h' s$ q
- matrices: [mat],
6 O) I- i- R5 D' Y5 L - texture: [400, 400],
, R( K9 E( |+ ^) c# y! h3 J& i - model: {4 h4 A+ \2 p% M: _; }" V# F; D# m
- renderType: "light",
4 p) ?( v9 ]* @5 l - size: [1, 1],
! Q- E+ S$ @" S9 R - uvSize: [1, 1]
1 P d: z' T' P/ I, `/ ^2 M - }* k% b1 C$ \4 H. D
- }8 r7 d- k! r% B7 ]: p
- let f = new Face(info);
! F. r+ D4 ?( q, B* | - state.f = f;7 v- y3 C; @' Z2 G
- 3 B T. d, G7 f9 z" }
- let t = f.texture;3 e( ?& e; ^/ R
- let g = t.graphics;
% r) I% C1 v% _9 }6 W - state.running = true;
) |6 X; H3 u0 l0 ^9 b) O& K - let fps = 24;3 j( Z0 `! J) O9 s
- da(g);//绘制底图( H4 X- v' j/ {6 }# P* M
- t.upload();$ v7 R$ Z8 w' [1 L. J3 n% n; {
- let k = 0;' ~3 {6 `: O& J2 h
- let ti = Date.now();
) s6 ]9 W! Z- S; e) m - let rt = 0;' @& @/ y$ E: t. x/ L4 s7 g
- smooth = (k, v) => {// 平滑变化
- s& ^- T; ]8 U. w2 b - if (v > k) return k;/ K( F8 ]+ [) z5 ]' f( A
- if (k < 0) return 0;
3 v. }2 G# G1 f# q" A: T6 K' P - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# l: N1 \0 F0 i$ A
- }+ D! e( V& W0 c
- run = () => {// 新线程
) G7 V% S3 r1 X/ T8 Z0 h - let id = Thread.currentThread().getId();
& R- Q2 |! V% b u# \' } - print("Thread start:" + id);
9 H5 d4 {6 F% N, L; J - while (state.running) {
8 Y0 Q4 o% S" _6 g - try {/ n' s9 q) T6 j
- k += (Date.now() - ti) / 1000 * 0.2;1 X3 U. M% o: ?9 d
- ti = Date.now();8 k+ z7 X+ y/ T& e+ g- L2 r
- if (k > 1.5) {
; o9 v& d f0 T9 N, p - k = 0;
4 y* }( Z+ q" [ - }
, Y/ h1 V4 N+ h# [6 p4 F1 q - setComp(g, 1);
, X M X% z- g* n4 X: T - da(g); A$ k! O) W$ R* F
- let kk = smooth(1, k);//平滑切换透明度
/ Q2 Z" A. m& M! e$ f( k - setComp(g, kk);7 Q8 J% i6 {' @5 b0 Q* R
- db(g);
) _ z+ P; l2 H - t.upload();
: O% n- K7 U6 T% S7 X& J& {2 \ - ctx.setDebugInfo("rt" ,Date.now() - ti);
- n& h0 H3 a' z; c - ctx.setDebugInfo("k", k);$ D6 A1 s2 o' q
- ctx.setDebugInfo("sm", kk);
+ ?! d0 t `# `% G - rt = Date.now() - ti;; d0 _- n8 P: W( x$ `
- Thread.sleep(ck(rt - 1000 / fps));
1 F8 w; R& p" R R2 v, F0 F: e - ctx.setDebugInfo("error", 0)
4 l0 `2 ~1 v- M s% I$ o% k% n - } catch (e) {5 y* @' T1 p0 P# J/ K
- ctx.setDebugInfo("error", e);
" f2 H/ A: p, Q - }
* @4 ~) O( A/ M) S9 [5 h - }
2 K( }# r( V) B! K" S! @1 T7 e" h - print("Thread end:" + id);/ ^" e& z5 S+ z! K0 g% C N
- }
! a/ b7 J: `8 b* u5 n- X9 A! F - let th = new Thread(run, "qiehuan"); U- y' q# O+ l: R+ |7 i
- th.start();
2 s$ E# S3 x. n- O* D - }7 R& e& c2 V- W# m( c4 _( a7 I$ }
- ( `8 i; c% U" _! m X2 `
- function render(ctx, state, entity) {
; R( L' m" T9 G2 [4 A4 Q$ l- l - state.f.tick();
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- 6 `+ `" y, j H8 @- Z" n2 k
- function dispose(ctx, state, entity) {
W( K$ J& {9 Z - print("Dispose");
! c0 } |/ V- ?1 h9 u# C7 Q1 G - state.running = false;9 c6 ]8 p0 @" L
- state.f.close();
; c, h3 h3 a' I$ e" M, I$ B: v - }! T+ R8 w% K$ F2 `2 i# c
- ; q% y9 r, f1 F& H
- function setComp(g, value) {; q: z; I+ u) k, D
- g.setComposite(AlphaComposite.SrcOver.derive(value));
, V% A; q8 h4 ?$ e2 s2 g/ z# q - }
复制代码
; J' @( f" M7 B( l7 Q& |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。# J8 c+ F6 \5 \/ i% y+ k6 j
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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)# p. j1 T5 z: S8 A: ~
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