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0 ^$ v! G4 L9 B& ~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。/ s4 N" S' A7 i" V
- importPackage (java.lang);6 B, b$ L) s- x4 h5 T/ B
- importPackage (java.awt);' ~2 R/ ^( k1 z) P7 t+ I: f+ Y
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( ^8 e& j7 P5 _# w; _
1 y d. ]3 B' E9 G# d- function getW(str, font) {
, I+ ?$ c3 Z( B, h& r( K - let frc = Resources.getFontRenderContext();
) b, e Q" i; N/ u - bounds = font.getStringBounds(str, frc);
' |# p; R1 C5 D9 U4 \# O. K I - return Math.ceil(bounds.getWidth()); e5 }8 h: \4 d# ?7 l
- }3 h$ h% j; S" y- I7 A% v
' p$ }- K5 c: |1 W) V8 Z! r( m- da = (g) => {//底图绘制
8 Z9 `* t) Z0 D1 o - g.setColor(Color.BLACK);
: ^% K& K1 I6 e" h1 }$ h' e& P- x - g.fillRect(0, 0, 400, 400);6 G7 g9 }3 O1 {9 |# X
- }5 p* N. ?5 M I
- 5 p. a5 H/ N0 S' u2 {5 r
- db = (g) => {//上层绘制5 c0 a N z9 D( M& [8 J: y0 V }" W( t
- g.setColor(Color.WHITE);* ^+ C- `& O- j- z6 x( q L( u( m
- g.fillRect(0, 0, 400, 400);
Z2 L: r" a" i3 ~$ C. m1 k2 P - g.setColor(Color.RED);
5 S2 z9 z# N$ o" D8 W4 ~1 N$ ? - g.setFont(font0);
+ Z: s9 j2 t$ u: x - let str = "晴纱是男娘";# Y) S+ [) x/ g1 X# _
- let ww = 400;
: S$ p; T9 v u. h5 d - let w = getW(str, font0);
9 D H& Y7 R' P - g.drawString(str, ww / 2 - w / 2, 200);9 x" b/ `3 F6 t! U) v
- }
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- const mat = new Matrices();
9 G- ~) F J9 Z! Z - mat.translate(0, 0.5, 0);' v% U) L$ b) J2 z: Z1 y
- $ X4 w; R* H0 z4 D# a; K
- function create(ctx, state, entity) {
) s" K! }6 L6 U4 c - let info = {
: W& a" c' h* B0 ]0 P - ctx: ctx,' R, P+ Y* M' L8 T7 s
- isTrain: false,1 ^: \6 f0 B. ]5 V t# d
- matrices: [mat],
9 J9 F- G+ [. T9 j/ O - texture: [400, 400],- Z, ^, T; _7 W6 @ e! ]7 _
- model: {+ f- j1 k2 P8 T2 ~: Q. {, ?3 T( d: u
- renderType: "light",4 [: Y: Z2 v' ?8 |
- size: [1, 1],
, C6 p; \* ~" f& l+ D; v - uvSize: [1, 1]9 D9 N& i0 @6 Y& U' D( `
- }
q/ n/ V6 P% @" U7 ` - }
! L* Z& b+ z2 s - let f = new Face(info);
' N+ f! |) ^# r. h. x - state.f = f;7 a! k6 P e* R
- # Q8 W0 }4 o6 a! q2 z8 l5 A9 t' n
- let t = f.texture;
( y$ F5 O. k1 F6 S - let g = t.graphics;
% {9 G. r; Q- W& e% p' `: D - state.running = true;7 G, a0 E' U0 h! V! O! y
- let fps = 24;, }) S1 z' H: S$ Y
- da(g);//绘制底图
, n" Y, M3 C' c5 J; [ - t.upload();4 y G2 D7 {0 |9 a) N6 i m
- let k = 0;
3 z% y3 }! E: K5 C( ` - let ti = Date.now();8 \" `* V3 a! E' n$ D
- let rt = 0;4 x& c0 {8 L5 Q, F* E M
- smooth = (k, v) => {// 平滑变化
K+ c. y, H; A5 ^) Z/ B - if (v > k) return k;' [+ h; e; } I c7 c7 R
- if (k < 0) return 0;
# Y6 H; o/ T- o; G+ |' B - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 Q$ f% j! T$ ?5 b - }
, C) f, C! O( P7 ?! R1 z0 ? - run = () => {// 新线程* e" Q0 h; q' G- k
- let id = Thread.currentThread().getId();& }2 E6 }3 `+ ^* n' } h
- print("Thread start:" + id);
2 h8 ^7 e- G- l7 m4 C0 G4 w - while (state.running) {, ?, [, n' b* t! z, ?
- try {
, ?& N/ d% Z; u2 w - k += (Date.now() - ti) / 1000 * 0.2;! H4 q2 C+ L$ c# S
- ti = Date.now();3 F# {$ m3 v2 w F! ^) m
- if (k > 1.5) {3 Y7 e2 @+ d5 r- V. w* i
- k = 0;
9 {. c; {, Z; {% I) ] - }. A+ \/ F1 Q2 A8 k
- setComp(g, 1);1 @# E3 z) }! \1 s
- da(g); q! s4 @1 C! {6 ?
- let kk = smooth(1, k);//平滑切换透明度6 `$ {! {* `$ t5 l1 L8 F8 D
- setComp(g, kk);
/ o2 _+ l+ n3 \* f3 R& { - db(g);
0 p1 O; M! I! t- j - t.upload();
* Y4 q5 w; |9 j& F - ctx.setDebugInfo("rt" ,Date.now() - ti);
8 g- r5 j7 k& Y8 v& Y) e5 u - ctx.setDebugInfo("k", k);7 r5 T+ T6 {: {
- ctx.setDebugInfo("sm", kk);; V# R! b) H4 Z" l% t4 B2 {/ s
- rt = Date.now() - ti;
1 E# ?. i3 n* y9 U3 S - Thread.sleep(ck(rt - 1000 / fps));
8 l3 i; i7 Z$ c& s& T4 ? - ctx.setDebugInfo("error", 0)
. }8 N/ c$ G* H3 k - } catch (e) {+ D. u' |) z9 h' j, s& ^9 ?
- ctx.setDebugInfo("error", e);
1 _. _4 b' \. n - }* w$ u) Q% R4 Q, h. d; L4 b6 e( s
- }
# u( W/ |1 D( [) {- m - print("Thread end:" + id);9 l1 \ a6 m6 H% H9 n8 h
- }
( K7 y! _. d5 z& Z- B3 w& T - let th = new Thread(run, "qiehuan");
- {4 ]8 b$ }6 V' l - th.start();+ D) u2 M2 K9 O- k" O# m# s S E- ^
- }
# C/ L4 D$ {9 e& L
. r: |5 o5 ^2 m: w& H4 O; b- function render(ctx, state, entity) {
; j9 m/ n: n: K) k - state.f.tick();
% H4 V/ r0 y& v) B" O( f - }
0 U1 v# \3 P9 I- U5 T
# _, {' U6 o# {7 t/ h- k1 f- function dispose(ctx, state, entity) { X4 F7 F: j) I/ W8 ^0 m2 \9 ~
- print("Dispose");
4 v, B8 L* A/ N; D - state.running = false;
4 |0 ~" m1 T# E2 v! v/ J4 a A, F - state.f.close();5 N$ j1 p" D* X% s& {7 S2 H
- }
# Z1 C* x3 T: F. z4 O% Q
0 |2 R, ~) ^% M; {- function setComp(g, value) {% ]- p# ` A' E/ ]
- g.setComposite(AlphaComposite.SrcOver.derive(value));' [$ I9 x4 B8 k+ J
- }
复制代码 + }6 P4 g& x1 k
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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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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