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0 A4 a3 u: E F% f& J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 j: ^. U+ P6 h$ Z/ F
- importPackage (java.lang);
; N3 m; K# @" @3 y6 @( [" W/ C) B4 ~ - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));& y# O- B8 p. @ m5 [: @2 d* W
* U( G. h0 }! C3 X2 `- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 A9 h9 ?/ f+ T" N ~2 X% |
- 3 o- K6 x4 |" A C3 `
- function getW(str, font) {& F2 h- G5 P! R% y _ ]9 e" x
- let frc = Resources.getFontRenderContext();: y' H8 R' v0 @: t$ K- a; O
- bounds = font.getStringBounds(str, frc);0 \3 X4 J# F! w3 H; c: o$ f' a. }
- return Math.ceil(bounds.getWidth());
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1 m' w: E# }+ M. R6 T7 u- da = (g) => {//底图绘制
* |7 V. W$ O; Y3 O( q - g.setColor(Color.BLACK);
" S# R% B( L- a# M' {: O - g.fillRect(0, 0, 400, 400);
# @! \" q: _, p1 P% w( G+ Q - }
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+ ]7 r; G T- D, A* m- db = (g) => {//上层绘制4 `5 I8 Z3 O6 C
- g.setColor(Color.WHITE);- \& A( n! h: }. I7 ^# X* C( U
- g.fillRect(0, 0, 400, 400);
/ m" V( k5 @& G" @% \+ Q7 N - g.setColor(Color.RED);
9 A5 s9 E+ M$ i. g! ^+ q$ j) h - g.setFont(font0);
1 [1 U; W! u! \- f" ^+ Y - let str = "晴纱是男娘";) g9 R# }' ]# a% X. f0 E6 k8 q
- let ww = 400;7 {' Z8 a1 S" { J, W; c
- let w = getW(str, font0);
0 V/ i# ?: O. z# ^9 F/ ? - g.drawString(str, ww / 2 - w / 2, 200);7 p4 I" h. @7 Q- {! J9 @
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- $ U- |8 R# T; t$ X% Q
- const mat = new Matrices();
: L5 p! b+ i/ b3 I - mat.translate(0, 0.5, 0);: V5 F4 z, s1 w D4 g
- ; W R8 L( s7 `* _1 z0 s
- function create(ctx, state, entity) {
# M# k* _, [5 ^. i9 X7 W$ } - let info = {
$ G7 B r( `$ }! ~% O) n) y8 q - ctx: ctx,( b* _) @7 W% u6 N
- isTrain: false,& b J7 q6 T+ p5 d9 @
- matrices: [mat],
3 K: @6 g2 [1 _+ F0 z; V' r4 _ - texture: [400, 400],
* }6 H, k. g0 U9 O- O+ ~ k - model: {
) B+ O; ~' \9 K$ c - renderType: "light",- y2 x8 [5 D4 l0 a1 G! v3 c
- size: [1, 1],
1 h' c) o9 C/ j2 F5 q$ [1 l$ k - uvSize: [1, 1]" e- H7 O, `4 q' U5 }8 M
- }& L7 M7 n; ~3 j" w5 P
- }
" z+ D1 I' [$ T$ z" U - let f = new Face(info);
9 I% X& z4 a7 A8 f4 W0 i - state.f = f;- s3 @2 G0 W `
3 W0 d1 W! P' o. M) _) E- let t = f.texture;
% l+ _$ i3 J' N! s - let g = t.graphics;& T& i* @5 T* ?! y
- state.running = true;; y( p% [0 s0 K3 r$ {5 m/ z
- let fps = 24;
% R% x- O) J8 n/ p# Y) M3 \& ] Q9 d - da(g);//绘制底图
5 z/ l, j% a0 l# j6 f3 Y* y- `& M - t.upload();# w. {* X1 C! P6 z% G6 g5 R
- let k = 0;3 J d6 K7 h- s$ a1 t; A
- let ti = Date.now();* u' z, ]* |. B
- let rt = 0;
1 E G% O! ^. _8 x$ m N! i' i! w0 b - smooth = (k, v) => {// 平滑变化5 A' A$ ]& N9 f5 M9 z
- if (v > k) return k;$ [+ q; `* p5 A; d* _" x
- if (k < 0) return 0;7 L7 ^0 h9 j3 X& b- t0 G2 M! f/ X
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ F# s& i ]. r! z
- }
: \; ^* W1 R2 H" h! k - run = () => {// 新线程
* e7 y0 J8 A/ p1 O8 z! ]( |1 \ - let id = Thread.currentThread().getId();; F1 ]. W& {4 E" r# \3 g
- print("Thread start:" + id);; l9 R% D2 q- @6 u3 N" J
- while (state.running) {
2 O$ Y: [: `8 \, w4 s8 v - try {
0 ^7 [* E2 g+ y9 \& d* X' W6 T# ` - k += (Date.now() - ti) / 1000 * 0.2;- E- m# u4 [0 X
- ti = Date.now();
! O: c9 y* }) H: T2 \% N/ @5 L - if (k > 1.5) {
, l9 H% N" m3 w. h" o7 }" `/ @7 D - k = 0;
- ]. p3 A3 z5 W3 Q! _- R, N# U - } ~: E# Z8 S0 a- `
- setComp(g, 1);. W1 g- i; i" h3 I+ q
- da(g);# ]+ V( f4 X# _& C" j
- let kk = smooth(1, k);//平滑切换透明度) Z9 C+ k4 J1 ?, z
- setComp(g, kk);8 X S; W6 g$ [! \$ T, ]
- db(g);
2 s9 M( O \ \) h" H7 T3 g - t.upload();0 X- c6 a4 }7 g/ n: s
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 c. c) x& R. y4 s" I. q# y& J - ctx.setDebugInfo("k", k);
% ~& r- r9 U( n9 b% R - ctx.setDebugInfo("sm", kk);
7 f- T/ k5 y* v# {% B+ P# d - rt = Date.now() - ti;& {) P. T4 _9 [
- Thread.sleep(ck(rt - 1000 / fps));
" S* _8 C6 [0 P - ctx.setDebugInfo("error", 0)
L6 |: q9 k* i3 u - } catch (e) {
, {* Q7 u, h3 u6 |' a# j2 l - ctx.setDebugInfo("error", e);( L" b1 |. A2 L8 u% G5 ]
- }! F: d$ z6 A6 i
- }7 S! U2 E. s8 X \' D5 X7 A2 _7 |0 {
- print("Thread end:" + id);
# Q4 d+ D+ J1 Q0 Y, I7 T - }9 ]6 h' _: i) I; Q: ]' L; p
- let th = new Thread(run, "qiehuan");
2 \6 B7 m+ }8 ]) ], _4 n) `7 [ - th.start();- ^; W, H @* G1 R3 J) e3 _9 Z
- }5 }. x0 x) i: p' q8 H3 u3 p- _: T. F
- / v- f, U9 Z9 ^2 C+ M2 x- @
- function render(ctx, state, entity) {8 w! r: d2 k3 z9 ~3 g% Z
- state.f.tick();
) [: z0 p' Z6 B8 \& B9 B7 X7 w. L' U, Z - }
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- function dispose(ctx, state, entity) { \9 ]4 N" o _/ s3 a
- print("Dispose");- P0 K; g) k- p
- state.running = false;
; y/ _$ Z. `8 R. b; K. j% _ - state.f.close();
/ y! s* L7 X% F7 j% r# }/ e - }
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- function setComp(g, value) {
$ @" Q9 I1 `$ H6 x - g.setComposite(AlphaComposite.SrcOver.derive(value));" x+ }1 g" e3 h7 e2 ^# L5 [
- }
复制代码 / x. y+ K8 R( Q9 L% 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。; S6 U# M- V9 e$ u$ U7 R
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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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