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* b4 g J+ p. U# E& r0 t0 E" Z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。
6 D) q2 ^: Y3 H( U5 }0 Z- importPackage (java.lang);$ P/ b* V5 M3 d% o0 |
- importPackage (java.awt);
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1 l/ u9 U2 k% o5 A! T- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 i- |- q, p# W! l! q. i: }$ h
- # D: R7 s0 u; k/ E* |
- function getW(str, font) {
4 k! ^' q) x) F0 M7 P - let frc = Resources.getFontRenderContext();- F/ ~% P( P+ S# l
- bounds = font.getStringBounds(str, frc);
1 T3 j' s+ {, m: i6 D - return Math.ceil(bounds.getWidth());& ?7 E O) e+ Q- X) |% F
- }
+ }) ^; M9 p+ c: s: T
/ y) s; n9 P r# z/ R' a- j- da = (g) => {//底图绘制& b# Q8 }+ N" W6 T9 Z
- g.setColor(Color.BLACK);
; r% Y" m2 j3 D( ?+ G3 J! S6 R - g.fillRect(0, 0, 400, 400);" l0 G& o3 c @, ^7 J4 j
- }( R0 r/ l; U* Q' I2 X; l) V
8 Z8 \4 @1 e7 ^0 |+ t- db = (g) => {//上层绘制* {; C6 r; ~1 r9 T
- g.setColor(Color.WHITE);
' x+ w1 p' ^1 g1 O - g.fillRect(0, 0, 400, 400);
6 {$ y# }3 d7 }1 U: ^ - g.setColor(Color.RED);
, }. R* ^! T: R) U- P - g.setFont(font0);2 f' l$ C! v3 _: H" ?
- let str = "晴纱是男娘";
% e- X. D4 R& M+ }8 I: s2 ] - let ww = 400;9 e$ ?' F T' `+ {) _
- let w = getW(str, font0);8 x; I" k F( [) e
- g.drawString(str, ww / 2 - w / 2, 200);
# G# @ Z& l. n - }
8 z o. [3 l* t) o6 ]
, ]7 Z5 ?" {8 _# a" w- const mat = new Matrices();
) @. x$ P+ d; y9 y, u3 J - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
. R; D6 n D5 o J - let info = {& K5 G' ~) g4 _+ P) ~% v
- ctx: ctx,
% i! }; x" U8 i8 ?6 R& r1 F - isTrain: false,
5 y6 t; T4 f! E# k+ p - matrices: [mat],/ \' u7 q( Z. {
- texture: [400, 400],
5 `6 i) @. o3 P - model: { H+ c8 S3 u! n* T" h; |. z
- renderType: "light",- |0 M8 n& |2 b: r1 m4 @
- size: [1, 1],6 N( Z1 q) U" q# _! d! s
- uvSize: [1, 1]+ _6 I Z7 } G. I( l! w; W
- }
" l- i$ d8 E: ]" Y: @ - }
: r9 F' e& K* ?5 w$ C - let f = new Face(info);
s5 D# L* I+ j ]. M - state.f = f;
3 j: Q7 g0 I/ _* g& R: g; L
: B+ o3 Y* v5 x! Q- let t = f.texture;
3 s4 x2 v+ R( i! e' i' { - let g = t.graphics;
0 O- N6 y9 ?5 T% ` - state.running = true;
9 T0 F8 f* r' K" _$ w - let fps = 24;
. g0 A5 Q m) s - da(g);//绘制底图' N7 t# h/ n4 m4 M$ b2 G/ G
- t.upload();5 Q1 P8 ]2 m) P. c" e% {
- let k = 0;/ D/ e* B' p* Z5 w
- let ti = Date.now();
* e" x+ b) u# F3 B4 T' A0 T r. e - let rt = 0;( N+ G# C; ]7 e! B9 K5 i+ P
- smooth = (k, v) => {// 平滑变化
3 X k6 A! ~! n1 g& Z' G - if (v > k) return k;4 u7 F/ k8 r& |: x) H; k2 d, D
- if (k < 0) return 0;$ e4 i& | G: r8 H9 J; d- A
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& Z8 w, x' a% h) A2 P3 r - }
# ] z) f# Q5 N, @ - run = () => {// 新线程
% f' d& i3 m. T* z - let id = Thread.currentThread().getId();
, e& B. D# \/ c0 G; v0 R0 ]5 _7 m - print("Thread start:" + id);$ a" L( b6 ~% f0 Y2 Z e
- while (state.running) {
9 U/ ?3 w% i9 W/ y* z5 L - try {. e8 R8 E/ d0 s0 x
- k += (Date.now() - ti) / 1000 * 0.2;0 R3 Y3 @ B1 B# \4 d7 J
- ti = Date.now();9 H! }/ Z3 W* ~% r4 ?8 }
- if (k > 1.5) {7 V+ [# [# [+ I6 N/ t9 n4 S$ ]
- k = 0;/ r0 \0 r/ s3 J4 c% [
- }
, o3 W# N& T% Q& R; Q2 o - setComp(g, 1);
7 e& O1 `$ x1 V1 |2 d1 c - da(g);
3 \+ W" v0 f" R6 L; D$ q9 S. E - let kk = smooth(1, k);//平滑切换透明度
9 ^" S0 h) Y* Z9 X - setComp(g, kk);
% e% \1 ^1 h% X - db(g);
, }. v" A4 }1 Y& ~0 x* c - t.upload();; W* @! m" P# Z6 p# @
- ctx.setDebugInfo("rt" ,Date.now() - ti);$ V0 R ?" ]/ y' D' R6 l3 u
- ctx.setDebugInfo("k", k);( C1 Z4 o$ R8 i% V
- ctx.setDebugInfo("sm", kk); Y. P2 i2 _$ O. }" `
- rt = Date.now() - ti;
# Q% Z$ M( H6 X$ ]; I - Thread.sleep(ck(rt - 1000 / fps));
6 f$ z2 i w, O/ g - ctx.setDebugInfo("error", 0)
8 S8 L5 x* \4 g9 T5 b ]% w# ]5 H4 q - } catch (e) {
2 u* Z W0 Q! E1 j7 v - ctx.setDebugInfo("error", e);8 B4 b- j- r6 @
- }
S$ O( `/ H( W+ u9 j5 z - }1 p5 B' H/ n$ n% ]. E, X& l
- print("Thread end:" + id);
. p6 L9 x E5 J8 E+ z0 k4 \ - }2 V* x: I9 J- u- u
- let th = new Thread(run, "qiehuan");0 H. h; `# G0 y7 w1 z
- th.start();
' A4 r" A `8 \. V0 H - }4 D m& q* w: d1 f. o
- 5 s1 Z, `% `* [3 R' w, X
- function render(ctx, state, entity) {3 A& D6 N+ u9 h5 A& E
- state.f.tick();3 h. G, `: {" T5 j7 B7 m# q
- }
) |- f: D& T s- b" b1 R3 A* t/ o7 m - & R7 P( k" z, b5 Q! E6 i
- function dispose(ctx, state, entity) {
5 Z* L! r9 A+ r8 r5 D: m - print("Dispose");, ?! n( i- R7 {* h/ q5 i+ s
- state.running = false;
4 x+ J- J% m: i+ n( o- y# T% l - state.f.close();! w+ @$ ^2 F' @# S. D5 z
- }4 y! ~& L6 b( k3 [6 D. K
- 5 ~+ D' r. Y/ @1 d3 z ?
- function setComp(g, value) {' \7 r* ]5 } l5 g+ p, c7 J+ _( N
- g.setComposite(AlphaComposite.SrcOver.derive(value));
3 j) i+ H. f4 K1 e! S W3 t, Z* | - }
复制代码 % y: @1 n8 S8 U: r# `# i
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。& n! v/ O5 o1 @" f9 y( W8 M
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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)2 b% v/ M; D3 [! Z
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