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. p, u$ R8 S$ H) I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。( Q' f2 x% ]1 n/ R& ]% q5 ?6 m, s
- importPackage (java.lang);
" j. F6 n4 {3 a0 Z - importPackage (java.awt);7 H* Y( I# c8 \; u% J
- $ k5 y8 a. u6 c, K8 [( O) n# ~
- include(Resources.id("mtrsteamloco:library/code/face.js"));; n& _1 `) e4 N* |( _3 f! D
- 9 B" Z. _; \$ Q/ X# m
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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4 W# `1 V2 Q1 r4 a- C- function getW(str, font) {
: T4 q% n4 }- u0 q1 E( V$ F - let frc = Resources.getFontRenderContext();0 S% T0 X: U- Q& F1 C2 S
- bounds = font.getStringBounds(str, frc);) N% ~6 F; u1 {; b' U
- return Math.ceil(bounds.getWidth());
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- 4 v. {! k( J; g/ C# [& ?
- da = (g) => {//底图绘制# T8 @( I4 o2 t! ^ l2 g
- g.setColor(Color.BLACK);: g) u c, @' a5 }9 C. M4 z
- g.fillRect(0, 0, 400, 400);
" R0 m0 l/ m$ H - }
/ I. n& p3 M6 h( U
! \( u; U) ?% L( `1 t. a, L- db = (g) => {//上层绘制
$ n' C0 u" h; J# c3 q" {$ K2 [ - g.setColor(Color.WHITE);
' W* X9 m4 _3 c. l3 W3 A' ?3 }: } - g.fillRect(0, 0, 400, 400);* u, X: e* b5 ]/ P
- g.setColor(Color.RED);
j7 _2 I2 I- J% p - g.setFont(font0);
1 ]7 J" ]! J% f4 S% w) T2 ~ - let str = "晴纱是男娘";9 `- o( J" g, a9 G' l, ^7 b
- let ww = 400;
5 Q3 D0 L1 u F" f ~: q - let w = getW(str, font0);
# J/ ]1 K% U( w: v% P! H+ j9 h8 I( V/ i - g.drawString(str, ww / 2 - w / 2, 200);
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. T; A" y9 C* f$ r9 s4 x7 y- const mat = new Matrices();0 U0 }% U2 X; l) P. f; f
- mat.translate(0, 0.5, 0);
# u/ y4 R) ^9 ^) \ - * v" j a, A! D8 m
- function create(ctx, state, entity) {
' d" J' _) c9 l# i - let info = {8 Q2 s! B9 A1 x( s% v% `' `9 r
- ctx: ctx,% Q. }: i( {) O4 D" j
- isTrain: false,2 O# h# b' B6 y7 j
- matrices: [mat],6 }% Y& Z! W: ?9 {& w: I
- texture: [400, 400],
: S3 M3 b; Q* L4 D9 ~ - model: {
_; n# _% L) e0 o2 o9 |0 Y0 _ - renderType: "light"," O# d: Z* f4 V/ F4 Q
- size: [1, 1],
d5 k! O$ b/ K9 k! s. n - uvSize: [1, 1]9 G8 |" O; L; b
- }" M* C# Q5 f( o0 D6 d0 B w$ [5 {* e# z) C
- }
/ C2 p5 l( `1 K9 d4 ^3 e+ z - let f = new Face(info);
% P% K& M* K0 R# p t: R& X - state.f = f;( D6 x/ i" v. e$ Q$ C
- 0 G! P5 u y# t% a
- let t = f.texture;
2 c4 h; K5 k" I* y' q$ S. o - let g = t.graphics;$ B+ a* H9 s$ ?7 |4 W5 E
- state.running = true;
a* ]: _% Y/ d" a8 W - let fps = 24; w9 {" P: B" U
- da(g);//绘制底图( i+ o, _; U: K% I& y5 O
- t.upload();
$ v8 ?6 Q) Z: l, q% N* J9 n - let k = 0;
' Y( E( S) D' Z3 N' M7 h) x6 X - let ti = Date.now();! d p" {- }3 E
- let rt = 0;* _1 r" N6 C8 W! }1 _
- smooth = (k, v) => {// 平滑变化
9 a6 v6 g4 L$ q% R - if (v > k) return k;( a0 L2 o9 l2 h9 i3 B; q
- if (k < 0) return 0;; F) y/ x& {* e& y" s, j/ I; E
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
4 m+ l4 X& f5 j+ g: n - }
( ]7 K4 @1 Z7 [, a - run = () => {// 新线程
( V( a7 g X- S0 A2 K6 h/ F; M - let id = Thread.currentThread().getId();- Q) y; r3 h) F( l8 G. ~6 [9 w g
- print("Thread start:" + id);
8 R `6 b& b) `' ~7 Q - while (state.running) {
. s5 K2 }& b: k- G" w- P - try {: {' @* h5 C1 T! J1 z- C. b
- k += (Date.now() - ti) / 1000 * 0.2;
7 I0 {0 C9 [& H* X o% P - ti = Date.now();% C: r4 O2 H( e! z% W- ^( W
- if (k > 1.5) {, c/ l; J: Z7 O
- k = 0;
% G3 k) g/ P N - }
, h* b: d- U3 n" T/ C - setComp(g, 1);
+ x' X m4 J" I! D - da(g);$ B- i+ Y" d+ S4 \
- let kk = smooth(1, k);//平滑切换透明度+ ]$ M) r3 s' o( b, r( f, F. ^- O
- setComp(g, kk);6 U7 ?" w' f( V6 J" H
- db(g);
) P& t- l# L9 p+ S L* V! F - t.upload();- H8 ]7 E& K( G" |8 X$ }% \
- ctx.setDebugInfo("rt" ,Date.now() - ti);
1 F' S- ^4 x4 W! n( N- U - ctx.setDebugInfo("k", k);
1 F: M3 b, I5 M' v) L* ?4 l - ctx.setDebugInfo("sm", kk); j, H# ]- D! y/ X) S. I
- rt = Date.now() - ti;! `" f/ K( T" o3 E; ?3 k
- Thread.sleep(ck(rt - 1000 / fps));
: e& L! G ?9 [6 X; M - ctx.setDebugInfo("error", 0)
" z. V4 K; v8 R1 q - } catch (e) {
& q! G/ ]6 P" k2 f5 i - ctx.setDebugInfo("error", e);
0 w" H- u; Y; G - }
2 z3 J2 R5 D9 F& x# p' } - }5 m, I2 A7 R/ U) h/ S
- print("Thread end:" + id);
" _: u- _2 ]# T! M, |4 q Y - }
) ]0 j8 G/ u. a- J - let th = new Thread(run, "qiehuan");
' _0 z6 F2 C3 ?# q- K$ } - th.start();" _3 a6 P- y* r9 T! Y0 ?
- }
/ A, ?2 X& j( k. I3 a. ?, z. k$ S - + \# T. W1 J+ t$ t/ [7 X. i
- function render(ctx, state, entity) {
5 H7 u% d$ ]$ q# T - state.f.tick();
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- # Q* a* \$ H7 j$ x
- function dispose(ctx, state, entity) {4 }# t8 k6 d# F
- print("Dispose");9 L) e$ R0 K; d5 V ^$ m1 D3 s& H
- state.running = false;
5 y+ ], T# @4 ]" w+ m5 i1 q% Z - state.f.close();
/ q, R1 W' u1 F* q q1 c6 q - }
5 _2 d+ j9 q0 Y' X
- I# R7 p, s ?3 _6 o" |1 L1 h- function setComp(g, value) {
* b- \5 H1 [/ N& z6 j - g.setComposite(AlphaComposite.SrcOver.derive(value));
" d% E1 Y1 G6 d0 y3 j; A - }
复制代码 ' [2 E0 j( l7 E
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。9 |" V! P) O; e1 x1 U3 ^9 H2 Y/ a2 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)
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