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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。4 V5 J1 k4 K* ?3 U0 F+ E
- importPackage (java.lang);
, L' r) |: i. Q! U/ C - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js")); Y$ O* N5 U7 @( Q1 J8 q9 {8 G
- " e) d% d9 _/ F$ S& L3 {3 ~& S
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. V/ ?. z; O/ p' `4 Q: s. G
- 6 W6 _7 p9 s+ y( w
- function getW(str, font) {2 F* ~- r4 D2 t6 [7 L# N% d
- let frc = Resources.getFontRenderContext();/ t% z5 ?: _) `% H, {5 C9 Y. x3 f
- bounds = font.getStringBounds(str, frc);
6 {: Q. s, \7 ?/ o2 m - return Math.ceil(bounds.getWidth());7 y% f1 c6 s5 c: g1 @/ `
- }
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2 a! u3 i% Z2 I/ ~- da = (g) => {//底图绘制
7 X8 S P/ M X5 u; ?' s+ @ - g.setColor(Color.BLACK);+ Q( X5 k7 [0 Z! [! ? o
- g.fillRect(0, 0, 400, 400);0 }% W+ Q2 x" B: \! |
- } \$ |- U6 o5 | \
- ! l: y( N' `0 c# ], B7 I, P D) g
- db = (g) => {//上层绘制
@! U, O7 f$ C1 t* R' O - g.setColor(Color.WHITE);
. R* N, Q* D5 D+ I) |3 z - g.fillRect(0, 0, 400, 400);
, \5 M; s1 g) m) D& t/ i5 V7 i - g.setColor(Color.RED);6 W( K/ @& x* V/ U
- g.setFont(font0);
y& n# K# ]% c5 E$ N( l( P - let str = "晴纱是男娘";, P) g/ p6 V6 I- j+ V1 w2 F z+ Z
- let ww = 400;
8 H: i. F( n H* m+ c% b4 S% ` - let w = getW(str, font0);
: ~- \4 J; U2 z - g.drawString(str, ww / 2 - w / 2, 200);" l5 j' W% t; R! E. Q9 m' I
- }4 E" s6 W; u& t" }" ^" h4 ~
- & M v, O d/ h* A" m$ @. q
- const mat = new Matrices();
; @8 Z7 t0 ~3 U# U# W$ l5 } - mat.translate(0, 0.5, 0);
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& z( h9 `9 _8 B3 J- function create(ctx, state, entity) {- L1 A6 \" |, K7 d0 z$ A5 ]
- let info = {
: @5 q" P. I# Z8 Y$ \ - ctx: ctx,! A% X$ |" [4 S2 m2 r2 w3 V! |
- isTrain: false,
& p' R2 [* L$ ^7 S+ ~8 k7 c K - matrices: [mat],' U) G; ]: z( h4 O
- texture: [400, 400],
* c2 h6 _8 Z! r: M' u; e - model: {
@! Q1 [* Q2 N( p - renderType: "light",
. m* p% f2 R+ N0 F/ ~+ [) S( I - size: [1, 1],
9 i$ ~3 \$ D" E3 ^' U; ] - uvSize: [1, 1]6 I& V2 }6 C: k' w( D$ L o+ n
- }
- D$ v4 S- Q- b7 } [3 h% v; S1 T! } - }' c% T! ^1 d I) W9 _& H
- let f = new Face(info);1 h" i% W5 K- a' U* Q2 I0 W
- state.f = f;
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' M3 h' J V; [6 i! c9 i/ S- let t = f.texture;
, X z* C* U+ f - let g = t.graphics;# Z$ M* X1 H' f: S4 `2 @! J p
- state.running = true;
5 K. V$ T( \: ~9 P7 I4 A - let fps = 24; E! c3 j( t2 X9 ?; u, I' x
- da(g);//绘制底图
" u& g" [9 [- t" l - t.upload();5 W. G! A& O6 L5 I: ^1 I
- let k = 0;' c! [5 z g# ^; D
- let ti = Date.now();! k4 B) M, L" d" H6 K5 `3 o, U
- let rt = 0;
6 e- W. f1 u# O$ a# k3 t - smooth = (k, v) => {// 平滑变化 I7 f2 n) Z) G6 _% R1 x
- if (v > k) return k;* t1 s0 D8 e. G/ K: v8 k
- if (k < 0) return 0;$ o" v* l2 W5 L U# \" g
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% E( }: g g6 f! k8 @; h
- }
9 ~- x' M, {7 v# ] - run = () => {// 新线程% k; G S* ?9 r3 d) x
- let id = Thread.currentThread().getId();
, q4 ?; [3 P3 W - print("Thread start:" + id);; U0 ?8 a3 M2 l, P5 n* B
- while (state.running) {
1 r1 l) }# Y) _ - try {1 \1 P& f4 e$ K* I# ]& Z7 [
- k += (Date.now() - ti) / 1000 * 0.2;# [2 J4 ~% X' I5 L1 }0 e1 b
- ti = Date.now();
' z7 J6 i& I& j5 f3 S - if (k > 1.5) {
* B1 V# b9 O% t. ~) q8 ` - k = 0;+ t0 j# n6 F+ ]2 w
- }* _' R8 _- c, v8 Z
- setComp(g, 1);
: M6 z9 x* m( X2 e - da(g);
( }" U6 y& @4 r! _: p% h' z W M+ a - let kk = smooth(1, k);//平滑切换透明度
- B3 L- {. B m1 ] - setComp(g, kk);* M8 L) C% B) }6 A# j; ^5 B7 n
- db(g);
* {, r! d2 U* d3 y: M! H4 Y - t.upload();
. q6 E- N7 u2 R) ~1 v - ctx.setDebugInfo("rt" ,Date.now() - ti);' p+ n1 v! T9 z) O* \
- ctx.setDebugInfo("k", k);& `; F1 N6 K2 B. @+ e
- ctx.setDebugInfo("sm", kk);
5 ~* D% }( S& Z t - rt = Date.now() - ti;4 v) i; g% F7 d5 K
- Thread.sleep(ck(rt - 1000 / fps)); [# R) ^( S, [7 W" y* I+ H
- ctx.setDebugInfo("error", 0)1 J( j" N4 |7 k$ e, E
- } catch (e) {
. t5 Y, y5 L' @: B - ctx.setDebugInfo("error", e);
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- }$ r/ B9 G8 _; x/ h' Z% {7 a* U% A
- print("Thread end:" + id);
+ J& I& E4 c) A E - }- Q+ q' s& A% J5 A
- let th = new Thread(run, "qiehuan");) a, ^) `1 h) G
- th.start();, }9 X0 N5 C7 N3 R" L
- }
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' T" a( G% M- J9 ]: e7 H- function render(ctx, state, entity) {( e. F0 U; l. D. c
- state.f.tick();
' Q7 s9 f% y, u; ^( }, N2 ` - }
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- function dispose(ctx, state, entity) {9 y& N, P- i J2 \4 o
- print("Dispose");
$ c* z3 O2 x- E' V' H$ i1 x7 a - state.running = false;
; B& d2 o' W' U& u/ k1 y1 V1 A - state.f.close();0 ]' W# @% @% ~2 g2 R/ \0 L
- } ?6 v3 p9 D- ^4 Z" o) A
3 P! \! G6 l" s$ x5 w: X* e' s" s- function setComp(g, value) {: @+ K p' V: R# H- P
- g.setComposite(AlphaComposite.SrcOver.derive(value));1 K- H% O2 T# k8 L$ N
- }
复制代码 " ]. S, l: l$ S- M. R
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)0 b$ z$ u5 q8 g
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