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, x8 y4 R4 K! A* V( T# T& {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。
9 v) F* Y$ u2 I, m7 y- importPackage (java.lang);- b+ g' {; k5 [: g0 B% M+ z z4 c
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
6 y" V4 T) |: F( u' {
' w, G7 w5 l8 ?- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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0 A& m$ ]7 H2 a1 E8 W- function getW(str, font) {) y9 V( E5 V+ ?; R& U
- let frc = Resources.getFontRenderContext();
, a, U1 X1 @/ [% L - bounds = font.getStringBounds(str, frc);
0 w0 G7 m- v- ?& O2 e8 V - return Math.ceil(bounds.getWidth());2 h& h: E! {6 D
- }1 ]. Y/ i I8 }! M2 L6 M
- * J5 x4 B4 t- ^# ]7 e
- da = (g) => {//底图绘制
8 K; v: d7 I; G5 b, F5 O9 b5 ^ - g.setColor(Color.BLACK);, m8 G+ I0 j4 N7 Z# B$ Q
- g.fillRect(0, 0, 400, 400);' d2 s; j1 I+ V. p& G" ?5 w) T
- }
: r* i* t$ |+ N/ v+ J0 P4 p+ G - 3 h4 G% l3 J; i) X! j+ K
- db = (g) => {//上层绘制
! v* w% Q% g# Z/ W' v( ] - g.setColor(Color.WHITE);5 A# x. `! F3 `
- g.fillRect(0, 0, 400, 400);3 e( d6 \4 h, U
- g.setColor(Color.RED);
1 I% _: ]# q+ A7 ?! q/ E. E+ \4 D - g.setFont(font0);
9 g, d: }- w, y - let str = "晴纱是男娘";
1 p% _6 f _ z$ q" ] - let ww = 400;/ u7 J L3 V, [ B
- let w = getW(str, font0);6 V# O+ Z* h r; a9 L0 v
- g.drawString(str, ww / 2 - w / 2, 200);
7 }* {) c, ~# z& y! Z) l - }
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- const mat = new Matrices();2 `7 O, T1 u+ N! r- n
- mat.translate(0, 0.5, 0);1 G" A; x8 |3 }: |
- 0 N2 o, s/ `2 Y) [. r0 N- X; v( H
- function create(ctx, state, entity) {1 Y9 e6 [; w, J, y( O
- let info = {
. r$ M; z- d+ }0 X- X. s: g* b - ctx: ctx,- \0 |4 n! Y' o% I. @+ A* e
- isTrain: false,4 ^: q* s0 j0 G4 a# h
- matrices: [mat],* ^0 f( D9 n7 v3 L: T
- texture: [400, 400],
8 c1 S$ m2 `8 f7 b* l: j- u6 N - model: {
5 Q" K3 z1 Q. m - renderType: "light",
L# l, X( A7 @ - size: [1, 1],$ ^: Y* s; _" j( [( e
- uvSize: [1, 1]
1 J8 H+ N }; |0 l - }
1 u% P# l) l F1 _5 X3 L) Z - }
I" B2 q7 B! M4 u* N - let f = new Face(info);
8 Z' }9 _+ s2 E8 a' X' c, s - state.f = f;
& `! S+ f: @; Y# r# R3 E& ?" `
) C, t) o# M1 s5 [" m- let t = f.texture;/ c+ I# P$ [$ g+ ^: }9 {
- let g = t.graphics;
' {$ i- g' L5 `$ | - state.running = true;
: N2 X' o5 g1 J9 S; |+ B - let fps = 24;9 K0 q8 ?& Y" @4 v! U& M+ Z
- da(g);//绘制底图+ j4 X) y6 h) R, ?/ _
- t.upload();7 E' L9 [0 H0 O! ?2 t
- let k = 0;
) r K# i2 A$ S- D6 T; E - let ti = Date.now();3 W9 U1 {+ l0 B$ q9 R
- let rt = 0;7 G9 J. f4 b. G4 U; }
- smooth = (k, v) => {// 平滑变化
% ]5 W: J1 {+ S5 @! b - if (v > k) return k;7 H( Q" A* D0 y2 E' ~
- if (k < 0) return 0;9 {# w' z1 W9 B, e
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" h' t) f" r( O% i# q - }
1 Z L7 K, d2 l: I3 q - run = () => {// 新线程
0 u6 O! P- D5 Z: S4 k - let id = Thread.currentThread().getId();
1 R; d3 L! j2 ]. y9 q - print("Thread start:" + id);* r$ s. Q' L/ U
- while (state.running) {3 f$ T$ z( X: b
- try {
6 d! x* T* K* x( {% l - k += (Date.now() - ti) / 1000 * 0.2;
" k7 p' P6 S, w! a- X: ? - ti = Date.now();* T2 R# M- |* U9 O6 T6 {
- if (k > 1.5) {
" o5 Y( z! W0 n; k! I - k = 0;$ M4 {4 @4 S" s* d }, ?( G/ e3 b
- }
' H! D4 { L2 \ Q - setComp(g, 1);
$ s8 I) v1 {" a* w, W1 b9 P+ ] - da(g);9 C: C1 L) f- ~5 `# ?
- let kk = smooth(1, k);//平滑切换透明度6 @8 S/ r/ y& @# |2 n
- setComp(g, kk);
* Q" p( |9 W& k$ Y3 h) h - db(g);- c1 u' w" V! i0 b6 q
- t.upload();
6 M; ^1 Z S! C3 Y - ctx.setDebugInfo("rt" ,Date.now() - ti);
5 ^1 m$ P' q5 d" N - ctx.setDebugInfo("k", k);2 _0 N2 [& `4 Z$ e- g6 h. ?
- ctx.setDebugInfo("sm", kk);
0 A ~, x8 [4 y7 l' K# c - rt = Date.now() - ti;, Q2 f; L1 @" l
- Thread.sleep(ck(rt - 1000 / fps));
( ?; P( b" E& T2 ^$ c6 F - ctx.setDebugInfo("error", 0)
# }+ B. v. n- v - } catch (e) {$ g( j5 j& Z S8 {: F) \8 ~
- ctx.setDebugInfo("error", e);" C7 v9 }+ n9 {/ P( h' G: V" [
- }
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- print("Thread end:" + id);
5 F) a1 n5 A! p# T - }
4 H3 x$ ? H9 C! p; N$ H5 z - let th = new Thread(run, "qiehuan");
5 u( l3 B0 e2 [ - th.start();: O; Z6 o) l* N; z5 e
- }/ Z4 |' O' a8 J( e" |- L4 E0 d# `
, P2 o! ?$ W) K8 a- function render(ctx, state, entity) {1 U* A5 n- z4 Y8 d' p j
- state.f.tick();3 t" k: X, n, S/ ]
- }
. f% {0 ?' y/ \8 D' Q
. F) K2 F1 v, F& C J- function dispose(ctx, state, entity) {
* t9 ~6 u- ?' C& y% _ - print("Dispose");
# K& }5 {+ \5 f% d! v: y9 ` - state.running = false;
H0 p: m& f2 K* v - state.f.close();
" r+ y l" ^/ ]+ b6 L6 h - }
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- function setComp(g, value) {: b! N1 p# T. a$ G# s3 J
- g.setComposite(AlphaComposite.SrcOver.derive(value));
4 ?- e4 U2 I1 H2 ^8 v - }
复制代码 5 b+ t" R' q6 C; n3 i6 \" C! N
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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)5 U& a+ V$ O2 x5 w
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