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% r# ]0 e% A# S( \# l3 ~) R3 R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。; ~, ?) [+ V8 x% K: _
- importPackage (java.lang);
' p% H4 h: X# X, F0 J) H6 A, _ - importPackage (java.awt);
) X# g3 ^$ ]2 F/ d% D! q
& u7 J( g- ?* g7 J: q- H5 @- include(Resources.id("mtrsteamloco:library/code/face.js"));; p+ V7 o d4 v" G7 Y; K$ K7 T+ T k
; ?" K5 w- a& a N: `. e- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! ~' A+ r( N5 B5 g+ M$ C) u
- 2 L' a2 s& B1 v/ T2 w6 `
- function getW(str, font) {
9 P$ p) i! h2 l: {" X) W& P+ `1 Z2 [ - let frc = Resources.getFontRenderContext();
$ W% G) d+ ]: M+ x( w( }3 R - bounds = font.getStringBounds(str, frc);
1 k* \+ N- Z. i% o2 Y8 u8 o9 ^# } - return Math.ceil(bounds.getWidth());1 U( b9 a* I8 L- C O
- }9 v1 b* g m/ p, `! A
! q9 v% h: ^5 s+ X7 ~ }- da = (g) => {//底图绘制
$ A+ M. L6 c$ n" L - g.setColor(Color.BLACK);' ]) E5 U/ V9 |, j- f$ H& u1 K
- g.fillRect(0, 0, 400, 400);5 `& }) c& U) B$ N6 E
- }
4 y: O6 r# i# \! a7 f0 A8 B - % q7 L0 K* t6 s1 V3 f3 \$ {
- db = (g) => {//上层绘制' J) h3 P/ b1 M/ p `
- g.setColor(Color.WHITE);
) [* g5 J1 ~9 R& w- ] - g.fillRect(0, 0, 400, 400);
. O. W2 c: h, B; Q$ N5 j: }! | - g.setColor(Color.RED);; a$ {7 V$ T2 B" H% N6 N1 Q: F1 V* _
- g.setFont(font0);6 I' A! Y" { X. l9 F' Z5 i
- let str = "晴纱是男娘";
0 a- g+ E6 p. Q0 Z; Z% Q - let ww = 400;6 J5 \5 N/ Y# t3 U( n
- let w = getW(str, font0);6 X8 P! D; \/ R) a8 l& T
- g.drawString(str, ww / 2 - w / 2, 200);7 B3 T; ~1 T' Q' m9 y+ g" B
- }# \: P2 a. ]: Y, @ l- f3 g3 r$ j. j
- ) ?$ H1 a4 [7 S0 K6 [) g
- const mat = new Matrices();/ t, \* w1 J* U
- mat.translate(0, 0.5, 0);* H( E9 m+ Y5 y# j9 y5 C# P0 K
5 x8 `& n% ^3 V x2 `* d- function create(ctx, state, entity) {( ^5 }0 E* ?8 o8 }
- let info = {
2 z1 b, {* [1 q' f' n U+ a - ctx: ctx,7 X$ \9 F* r% V: s: i1 Z H9 i
- isTrain: false,- G; a- \1 o! r3 o( d1 o0 `, o
- matrices: [mat],
, p' Y! T& V" h% I8 h- w5 T- ]2 O - texture: [400, 400],
u- S; h4 t9 j# T - model: {
* a8 Y) ^* s7 u1 b# A8 V' i - renderType: "light",
, V) U) `$ o' N( q; d. W8 R5 M7 e - size: [1, 1],
& u* z' l; n0 d2 v1 T - uvSize: [1, 1]
t$ C0 u$ E" [$ a - }
! z! X4 e# w2 ^2 \6 T - }
" a% l7 Z- e. |0 O - let f = new Face(info);+ ?) @* Y% |+ K. a
- state.f = f;, u" n6 j: P* M N1 ^
$ B. s0 ]2 S; _" H8 `3 I- let t = f.texture;8 x2 Z& `% W4 b* ?4 y! {3 }
- let g = t.graphics;
Q7 [( |& F3 w! u8 d$ o - state.running = true;9 o2 k% P9 V$ ` H* p
- let fps = 24;% c7 g& e2 j! j% N% D$ n# R
- da(g);//绘制底图! N0 ]3 H6 l" Y! c$ ?, u; i
- t.upload();" a8 b) S3 Z' g7 C! {' N
- let k = 0;) d. |; u' J* B5 ~' P6 d
- let ti = Date.now();4 c; W k1 t$ h! `& H2 n- Z5 v
- let rt = 0;* J: f0 x2 z$ C, E c# x
- smooth = (k, v) => {// 平滑变化/ {4 ~+ J6 Z, T
- if (v > k) return k;
1 S. M" L/ y& r. p E5 f - if (k < 0) return 0;
6 q4 A1 |+ o; z) x9 Q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& u- f. M* a) ~' i$ z8 T - }# n' M: W" {# I% p
- run = () => {// 新线程- o+ f; g5 w# Y, k
- let id = Thread.currentThread().getId();
5 @4 ?8 Z- L2 O& x2 \1 g) L0 p ` - print("Thread start:" + id);
1 \0 i2 a$ s" r+ V) x - while (state.running) {- q9 R5 F8 a( \) b l I
- try {$ h! Y1 j8 w3 o5 e9 @ v
- k += (Date.now() - ti) / 1000 * 0.2;
5 s, d8 I; o- ~ Y" O - ti = Date.now();/ B8 y8 K& P5 C- h4 [* {7 }( c4 t* F
- if (k > 1.5) {
w% D/ E# n# I4 ?5 B8 z - k = 0;+ H5 ^ O% y( a) i
- }
- _6 C+ _) @9 {; D# g. O. W1 ? - setComp(g, 1);
4 z. ?! p- R ]" Y - da(g);
; h$ e5 A: Z/ e; E+ r3 g - let kk = smooth(1, k);//平滑切换透明度
) U) K" V2 h9 G1 Q1 X - setComp(g, kk);2 m1 _: }, Y; d4 f/ B7 i r% k
- db(g);
# c4 B+ }- I: m5 h - t.upload();2 X: s u4 \/ F" H! c7 G; w
- ctx.setDebugInfo("rt" ,Date.now() - ti);
c' [. J( C9 c6 I - ctx.setDebugInfo("k", k);3 u/ u2 n E3 M; g. ?
- ctx.setDebugInfo("sm", kk);3 \& O1 M7 u$ c T( a
- rt = Date.now() - ti;
! x8 l; ]; r8 I8 I) B- d! t - Thread.sleep(ck(rt - 1000 / fps));) e* x* F5 O2 W
- ctx.setDebugInfo("error", 0)
2 t V& ?5 V& H, F - } catch (e) {
J# o# X8 j" C7 B: P7 j5 x4 T) i0 } - ctx.setDebugInfo("error", e);4 F; x0 b% P x4 @$ \8 Z7 e& W+ N
- }) }/ V& |( `3 o4 l% v
- }
7 ?6 w5 E X: o7 s - print("Thread end:" + id);3 D' ^% E h S; L5 z
- }# f4 r3 M4 S4 z; ~; j
- let th = new Thread(run, "qiehuan");
; a6 _/ `9 E' d - th.start();
4 `& w. L1 a6 M/ S( s0 o, I - } c3 Y0 W4 @% t/ H8 F
( w0 d9 ^8 j3 r G- function render(ctx, state, entity) {. a6 n2 j$ b2 Z2 i/ F9 \
- state.f.tick();
& }6 s- c+ N9 b7 `' F/ Z) I - }
; J/ N! M4 G1 Y2 e
G; d7 ]4 s; n6 o; C* ^- function dispose(ctx, state, entity) {- F# O a) H* {
- print("Dispose");
, A" R& k3 q, a - state.running = false;5 q7 E3 h$ v7 E) u
- state.f.close();" q" F z# Q$ a A
- }
$ ?- N$ i Z& m/ G- V - + o' J, m# y$ i, w; U3 L
- function setComp(g, value) {5 B% N$ u( W" x
- g.setComposite(AlphaComposite.SrcOver.derive(value));* R) M5 \, O/ x0 j& w
- }
复制代码 2 w3 i' V9 V- t
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。* w" ^) \. \! N3 e, f2 E
' ~7 r& q6 R" @) P% A/ N* R( ]% s$ z1 p) ]* w
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)% S, u3 o! E( Y
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