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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。7 l Q/ X# T9 s' f7 k
- importPackage (java.lang);0 d! d+ m# }# W9 k$ n# ]1 y
- importPackage (java.awt);
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+ e6 K- c- Y7 f9 O5 I, I- include(Resources.id("mtrsteamloco:library/code/face.js"));0 Z& Y2 F; r$ K- v# \. j% k
- ' `4 w# h6 {9 [
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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/ @. ~6 M. k5 U5 p- function getW(str, font) {
9 b- B9 y7 A1 x S) V" s - let frc = Resources.getFontRenderContext();
+ A/ B7 C( Y. [9 n. X! |) E- L5 ~$ r - bounds = font.getStringBounds(str, frc);
, T6 m9 P, O5 ^! H6 Y - return Math.ceil(bounds.getWidth());5 h! X2 ~5 z$ w. b# Y; Q7 N: M
- }' u! J+ Y# r6 ^# I0 Q3 B2 e1 W! A
- - T' F/ O$ L' b6 \- H
- da = (g) => {//底图绘制7 I1 j+ h! {4 j$ h4 F5 b& j
- g.setColor(Color.BLACK);
5 n I; p# g: n4 G - g.fillRect(0, 0, 400, 400);
" S) ~8 N# G, D5 q - }
: I- G3 m) n# m9 D8 g
, K' S Z0 k8 n/ a" j- db = (g) => {//上层绘制5 s5 L5 N! W' w) D
- g.setColor(Color.WHITE);
Q0 e& C% j5 q3 e$ Z3 e - g.fillRect(0, 0, 400, 400);! ]$ u. {- I3 _$ R# J
- g.setColor(Color.RED);% r7 \- [. m( k" a. s
- g.setFont(font0);' n) F3 v4 N! Q
- let str = "晴纱是男娘";7 N! Y/ v( {5 _( ?5 a3 b
- let ww = 400;' \; R q& J ~8 J+ R* e. K
- let w = getW(str, font0);
( `" x% O T9 p) R - g.drawString(str, ww / 2 - w / 2, 200);
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- 3 _# J( H( I; j" B. y$ }/ N- O
- const mat = new Matrices();
( j9 l4 \' D3 a# H- ]. [ - mat.translate(0, 0.5, 0);2 `& Z8 {4 ^& E% a! l
# H' O7 E; _" e5 p. ^% o" r- function create(ctx, state, entity) {& t, b* N c1 B6 l8 _9 B
- let info = {7 m/ V; j8 _, b( |" f( x
- ctx: ctx,
9 T- S& B; m: P7 h. a - isTrain: false,7 A. b! O1 k. i ~6 q$ f, r
- matrices: [mat],
0 c( K3 F" N8 x7 e - texture: [400, 400],9 u! |/ Y7 T$ O% g3 z2 {
- model: {
! ^& o+ z1 w. p$ g4 A - renderType: "light",
U1 m$ R ^* T3 e" l- E C& d; L( I" ~ - size: [1, 1],: c, ?2 O5 l1 \" A/ |! I3 I
- uvSize: [1, 1]
( r, o4 z" a0 H$ \* {, v4 F/ M8 B% Q& i - }
& i; d8 {5 n$ N6 p - }
8 X% Y! m1 b- p$ d+ E0 S( O9 H- Y - let f = new Face(info);
3 F1 ]# {) a! L' c4 y" ?: ^ - state.f = f;
/ |6 @4 n/ b. A3 e/ S
0 z( i4 Y0 v6 u; {5 T- let t = f.texture;9 v4 L' H) w6 |* R h& ?
- let g = t.graphics;
G/ y( d: q D4 z+ y- S) h2 j- j - state.running = true;
1 U4 f' p! G! O$ v; _' l" j - let fps = 24;2 d, W( W! B- y/ H/ H( ~5 u5 B6 ~7 {
- da(g);//绘制底图
$ B- N7 c. `8 Q - t.upload();) K* Y" |4 p* @
- let k = 0;/ C7 }2 d) n8 R: |: [
- let ti = Date.now();
6 p/ b+ b) P' N8 [3 n - let rt = 0;
8 @9 R1 L: r/ g3 }; |9 Y# H - smooth = (k, v) => {// 平滑变化
; V, }8 d( @% R5 _ - if (v > k) return k;4 b) u* Y, ?9 K9 G J. g
- if (k < 0) return 0;0 D; | z) ]% f5 {
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 } r0 C2 F( L/ | - }
6 ~' N$ H* b5 n - run = () => {// 新线程
4 X* E2 \- }& v' {, p3 e - let id = Thread.currentThread().getId();+ _. R( O: N* A( c
- print("Thread start:" + id);
9 P" w" }2 h" ~$ `: s - while (state.running) {
% w% p1 M5 X$ z' ?0 k/ l" O$ ] - try {
6 H. F. e2 n7 T( c - k += (Date.now() - ti) / 1000 * 0.2;
% v1 I; E3 K& x$ k6 z5 W$ C$ o - ti = Date.now();" R" R# { \" y8 B4 Z3 ~% o
- if (k > 1.5) {
1 Z4 H1 K9 T- {4 h - k = 0;# Y# e5 R i" q: o/ r* ^9 J6 t
- }
6 i5 a3 N( k. h2 R) U* Q# k# Q - setComp(g, 1);* j# |6 v. V k& P2 a( S# I
- da(g);
. [7 m" A$ l4 l - let kk = smooth(1, k);//平滑切换透明度6 L! n, B' e6 P _, S! n' f
- setComp(g, kk);
, m( @+ s8 w) d4 X - db(g);7 ^# Q" _: N/ v; \$ ^% l- O
- t.upload();+ h, v' k5 W5 Y/ p
- ctx.setDebugInfo("rt" ,Date.now() - ti);
. Q" A1 v( i) t* c; R1 s - ctx.setDebugInfo("k", k);7 o# u7 G7 Z& c+ v- n
- ctx.setDebugInfo("sm", kk);' a# r5 j. i# a+ B1 Z, W
- rt = Date.now() - ti;9 H9 `1 F' M( K+ {
- Thread.sleep(ck(rt - 1000 / fps));4 l7 i8 K" ?. e3 X6 N0 z
- ctx.setDebugInfo("error", 0)) u3 y! v2 `. @6 ?( Q
- } catch (e) {
! q4 U5 O1 ` O - ctx.setDebugInfo("error", e);
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- }. ?" a& i2 ]- a5 h0 Y
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");5 R' \, k! a& ?, L$ H8 M
- th.start();6 u7 T$ T. v- c6 z" s6 f7 G
- }* H% j( h7 k6 w1 Z- X) D0 L, E, V1 q
- + x' q7 L# \1 d7 G
- function render(ctx, state, entity) {% A+ _, j; Q; a6 v
- state.f.tick();
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- $ L' @* u1 o: p, ?$ w/ i, T
- function dispose(ctx, state, entity) {' d4 o2 H8 d6 E0 |6 J
- print("Dispose");7 }0 S( }5 ~* y# `" j! Y8 Y
- state.running = false;6 x. K8 D! o5 R \, [3 t
- state.f.close();
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- function setComp(g, value) {
' x2 V6 J: K6 K2 A3 e0 d - g.setComposite(AlphaComposite.SrcOver.derive(value));/ ~+ i7 b; V( V5 R0 @: G# Y
- }
复制代码 # ?4 e5 G K+ }/ i! I/ a) B
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: ]; a; ]+ W) v$ i
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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). f! w, S4 s u, I8 \
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