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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。$ r- ]! Z. ]% F
- importPackage (java.lang);
5 w5 s' }% W- K- \# {& ^ U - importPackage (java.awt);* j) l; p0 {# m: x) R
$ Q5 f3 I2 `* }6 U3 W2 p! m A- include(Resources.id("mtrsteamloco:library/code/face.js"));
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k7 a4 G$ H1 ]! [1 X; j( P! ?$ I- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 ]8 I- l! l- J$ B6 K- K0 }
$ S* O) I V( b7 q* W) e- function getW(str, font) {9 r6 }) V m2 T3 p
- let frc = Resources.getFontRenderContext();
( V9 p" S9 Z+ U% Q5 r& a - bounds = font.getStringBounds(str, frc);
% G0 p& \; J5 h* T4 z4 J7 G% b - return Math.ceil(bounds.getWidth());
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8 H: _5 d8 x: ^+ |+ U! ?- da = (g) => {//底图绘制
" W% P4 R" ]3 q$ I6 R6 W: E7 s - g.setColor(Color.BLACK);
3 m% O" z8 O( ?, x - g.fillRect(0, 0, 400, 400);7 R; p2 q% i. s+ @
- }2 w& e+ M2 p' ~, ~
: G! ~0 J0 {" G% S- db = (g) => {//上层绘制5 M* D, N2 H* j1 H6 c* u
- g.setColor(Color.WHITE);
& I( q) c) e1 o7 D. v2 V2 t - g.fillRect(0, 0, 400, 400);
2 G& H7 a3 P) `7 k - g.setColor(Color.RED);# _2 C* I- J2 Y7 I: h: s9 H
- g.setFont(font0);# S; R/ U0 f' d5 E* B
- let str = "晴纱是男娘";) P: g/ U- F& }2 B5 J
- let ww = 400;
. n# J; ?; H2 ^( \7 W - let w = getW(str, font0);
- z4 V3 X1 R& e i- V* ?, G, } - g.drawString(str, ww / 2 - w / 2, 200);
. ~( k% s4 G) R( j/ | - }
1 ^ s4 T" [3 W( a2 R% O+ c& Z* J - / t% [2 p/ l( }/ q8 u2 I( ?
- const mat = new Matrices();
; D) t/ }5 z1 L% ` - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
" j1 D7 D+ q0 r - let info = {7 W+ W w$ [; Q9 ]8 H, V+ P
- ctx: ctx,
G% C: Z8 A. n9 P; b* W3 `- L - isTrain: false,
2 W! f, R. ?# t% Y" u# o; {6 ^ - matrices: [mat],
: O3 D# o2 q S$ t - texture: [400, 400],) g* e" y2 M& U: B
- model: {7 j" Q1 q& w% h. w8 U3 B
- renderType: "light",6 t$ T; p1 v2 W! }
- size: [1, 1],$ A' B; C9 t/ d: }: H+ f
- uvSize: [1, 1]
D- g, V) T A/ Y$ J - }
O: T% m/ m N- Q - }+ h6 O1 G* }0 F4 [- }* |) ?
- let f = new Face(info);
: Y8 x; |' t& ]. L - state.f = f;
H9 U+ ^& M. Y2 S( v1 q- P+ m
& A( q, y5 C0 i$ D) H+ I7 B- let t = f.texture;* Q7 {6 L9 Q) J1 t' H/ ]* t3 b# K
- let g = t.graphics;
, s! G8 g% X$ X/ H6 Q* n& G - state.running = true;5 u% H7 H" ]% t
- let fps = 24;+ r- F2 Y, a& m6 y* a( C
- da(g);//绘制底图
- x5 g7 ?2 k' H3 }- I - t.upload();$ C6 Z- U% [: F% K3 E3 `
- let k = 0;: N' c- a. Z; R# q& b# q( Q
- let ti = Date.now();
1 a/ s' U- S7 c3 T4 j - let rt = 0;; `# G: K& K3 ~+ J) k( h
- smooth = (k, v) => {// 平滑变化, _ b# N9 ^* B2 W6 h
- if (v > k) return k;. ]3 E& Q2 V$ r3 W; I
- if (k < 0) return 0;
1 q7 W5 Z# Z6 b7 C& L6 Y - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% j# E3 q6 q" s2 \" F% Q1 X- h - }
; t" i& U0 }! E' {. s* l2 y4 u - run = () => {// 新线程 m# a! Z$ B. W, n
- let id = Thread.currentThread().getId();
, F; w' ~) ?0 H6 P5 P - print("Thread start:" + id);1 P; {+ I9 F1 ~+ R
- while (state.running) {% H) x6 M2 C- I$ I3 O1 Z
- try {
, E) W; k$ J P! F! v, d - k += (Date.now() - ti) / 1000 * 0.2;! E' a2 f5 Z6 w5 }; N- r
- ti = Date.now(); B) |3 K D- \* V: c5 N1 |" O
- if (k > 1.5) { a: H+ r* y9 ^" H" t6 t
- k = 0;
, I6 c& L4 T% e- d$ X0 Y1 Y$ m - }
8 h3 n5 j, ]- R% i& J( r - setComp(g, 1);8 Z% X O+ ], p
- da(g);! M: T$ @$ J, ^6 _7 S% C4 o
- let kk = smooth(1, k);//平滑切换透明度3 u. p" K# q* c2 y% O; d1 s3 L
- setComp(g, kk);+ S$ }7 C0 a8 X N6 T' @. q T z
- db(g);( W( W" T P5 z% n' Y
- t.upload();. _" m0 l" A) H* B
- ctx.setDebugInfo("rt" ,Date.now() - ti);; k7 }/ _5 ~$ F- L) m! |
- ctx.setDebugInfo("k", k);
* L3 v/ M8 w) y! P6 \- K. Q - ctx.setDebugInfo("sm", kk);
, e1 Z! {. Z3 l% r2 O, G, W, W; ` - rt = Date.now() - ti;: A% K' p6 _$ L& ^8 I; ]: j
- Thread.sleep(ck(rt - 1000 / fps));( \- {+ S% H3 `
- ctx.setDebugInfo("error", 0)
- D1 O8 g) v1 u/ R9 e - } catch (e) {' g& ? j( C+ G" _( \8 X3 \) L# Y
- ctx.setDebugInfo("error", e);' [' { s/ ]5 q" J) G6 C* v
- }
- d/ G' y) X8 I4 Y c - }
. v1 f* C% ]" d% a% a ]! v - print("Thread end:" + id);& G& Q" N0 J0 g
- }
9 ]/ l3 N# d& D - let th = new Thread(run, "qiehuan");
- K. Q4 a8 |2 T" f# c& m - th.start();( w% @! Y' Q- s# V K& u
- }. z+ Z: }" X" o5 `9 J! ~
- ; M$ d7 K' m" h! y
- function render(ctx, state, entity) {
/ _* T, v* w: W. ~: _; z# ~2 E - state.f.tick();
& n% G3 V& a2 _" S0 ~ - }
" a. r9 R R; x - / B4 c4 _" N& Q
- function dispose(ctx, state, entity) {( s! A, G- o; x' w2 r
- print("Dispose");
, j% v- r, O/ J - state.running = false; h. H9 H# {0 a7 d! }) l% j6 ]
- state.f.close();
! k8 b" k" S4 J9 p: _* E - }
9 h% [+ o8 c8 L" A7 u/ T- m7 U - ' T2 ^$ ], \. Q2 g. E% ?
- function setComp(g, value) {
6 A1 v- Q! w I- b - g.setComposite(AlphaComposite.SrcOver.derive(value));
7 F9 A) n2 K+ v5 h; I; h" g" S: a - }
复制代码
3 ]/ |: ?0 h# C8 F, @+ y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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@7 @* s, p4 F M8 q! P- \% b
, K; n8 k* U, Y' X顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)+ c1 W1 G7 B. O+ w9 p5 K
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