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$ ]6 `. r6 J6 ^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。 n# j0 _3 Y- @7 F& W0 w2 ]
- importPackage (java.lang);( [# g: W Z" t+ Z
- importPackage (java.awt);
- E0 a8 a/ d$ ^! R( v4 D - 1 s4 | E6 ?+ r2 U
- include(Resources.id("mtrsteamloco:library/code/face.js"));) K4 D+ m/ \* e9 k3 q* k; p
- ( m5 f9 v9 L p: f8 K; @; W
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
+ ?3 [4 z' |% G' {9 g - let frc = Resources.getFontRenderContext();
" u! c M5 g9 B: ]* w - bounds = font.getStringBounds(str, frc);/ O1 I- o5 ^, C4 S U
- return Math.ceil(bounds.getWidth());
# G5 L3 D9 l9 f9 W - }
, C2 X- y- _6 F4 m
- x% E- o- n$ O, e: E# f5 x- da = (g) => {//底图绘制7 M. L5 Q, \" B2 x4 \5 u3 i
- g.setColor(Color.BLACK);
" n0 s( L2 ]; h8 {! q* D - g.fillRect(0, 0, 400, 400);
2 K7 p7 _- Q! ^) b+ e. X - }
0 P& \: s+ _) L
! _9 n a' I6 q- y- db = (g) => {//上层绘制* }0 Y1 a* b1 {8 g9 T8 M" ]
- g.setColor(Color.WHITE);
. g( [. d, U3 v! S9 k% h - g.fillRect(0, 0, 400, 400);
6 ~, q/ [3 H3 ~5 I - g.setColor(Color.RED);
6 A9 s0 M2 E0 t - g.setFont(font0);
( x% \. P! N- O+ s2 X - let str = "晴纱是男娘";
0 T" I2 @( \$ j( f4 [( V9 Z - let ww = 400;
7 b6 F" l, w, u* ^# K - let w = getW(str, font0);
5 R' l- m, K1 y8 e - g.drawString(str, ww / 2 - w / 2, 200);9 ?6 J3 V" F( G' L* \, K1 r
- }3 {- \4 A U6 x; z5 {0 `
2 m: F; \% J. w6 d9 b+ s- const mat = new Matrices();
- Y5 s8 A+ @; u$ R - mat.translate(0, 0.5, 0);
& {- B% _0 E l5 E& A# O3 F6 z - 1 C( _5 X4 T; L w/ O
- function create(ctx, state, entity) {& U* j2 }1 q; Q% o( p, G- c
- let info = {( k$ a+ K3 v. v0 h2 N6 C9 y7 i7 Z
- ctx: ctx,
P% S; A( I, j. ~% N- h0 f - isTrain: false,
# O- S7 B" z! m+ ? - matrices: [mat],
- J! h# r/ i& W) N1 ^ x$ j - texture: [400, 400],. Q; }+ X/ Y9 t5 G; l4 N9 G
- model: {7 E( a8 B# l! b# g2 q: H1 F8 f
- renderType: "light",
! e5 l& d+ c* p g* _# g! | - size: [1, 1],
" C& G# Y/ i @5 k( H - uvSize: [1, 1]
7 t; L x5 m' M+ u- u4 _ ] - }( Y* U# y; T, k) F& @
- }" L4 n# j* T+ O* Y
- let f = new Face(info);6 N4 |6 J1 _) v) `- A6 H
- state.f = f;9 j. f; j+ b- K" k
- , M5 ^( F% Y+ ^3 ?6 ]9 a
- let t = f.texture;( |. d$ W" P6 g- B* G' v$ }
- let g = t.graphics;
: M) @- V& \: S+ T - state.running = true;1 B: Y, B2 C1 c/ k6 g, f
- let fps = 24;$ _3 i+ I, ^6 e9 S: N( n$ H/ m
- da(g);//绘制底图
! _" O4 m7 G( w( [# T5 \- `6 L+ R - t.upload();
& T. i4 X, A: `' w - let k = 0;+ z. p3 B% M! u+ o% W& k3 w) d4 g2 w
- let ti = Date.now();
9 V/ \0 v, }& j$ i9 z Y - let rt = 0;$ e& w$ I$ b4 h& k
- smooth = (k, v) => {// 平滑变化
; Z& T& T+ Y1 U- w: s! p6 _, Y - if (v > k) return k;
3 [1 g4 B! P0 l# A: l7 c - if (k < 0) return 0;
; L0 `! `/ T" `$ ~8 @; E: ~ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 U( R/ ]) E5 t) R! t# g& b0 J6 G( a
- }
" O( V( {4 V0 V. a! @ - run = () => {// 新线程' U# ]) J8 I' q; {
- let id = Thread.currentThread().getId();
N0 R' a( D* d0 M) f7 d5 a* Q5 l - print("Thread start:" + id);
* p* r& _% a7 @. z2 ? - while (state.running) {
: ?/ p' O N. ^. \# D2 R - try {
* K; v; ?2 B3 A H - k += (Date.now() - ti) / 1000 * 0.2;2 O. o8 _. G2 r. l$ q c
- ti = Date.now();+ u3 I2 }3 X$ O) c/ K
- if (k > 1.5) {
]0 L3 K- y! i1 W9 v - k = 0;# T! D! R" E' J& d$ d& A: B' C: x8 h
- }
0 z% w' K: s6 ?) T8 b - setComp(g, 1);
! z- X3 `- _6 s3 m4 t% w2 { - da(g);
* H$ I; i: T+ p- X$ G( p- Y - let kk = smooth(1, k);//平滑切换透明度
# l) j) m+ |! A1 }+ S - setComp(g, kk);
1 C/ ^2 F' h2 x- A1 E: ~# x' e - db(g);4 ?( N8 f q0 n
- t.upload();9 e% t, Z/ ^: c, B; `
- ctx.setDebugInfo("rt" ,Date.now() - ti);. r1 n9 j1 I: S4 \+ L2 V9 v
- ctx.setDebugInfo("k", k);
; ]" S# ^) _4 s - ctx.setDebugInfo("sm", kk);. D4 }* u/ u& ~4 f9 N. d- v) @
- rt = Date.now() - ti;
4 F1 z. Z1 ]- t0 q7 ?' w5 y8 \ - Thread.sleep(ck(rt - 1000 / fps));
! u/ ^( S" F3 v- ]0 l - ctx.setDebugInfo("error", 0)& K3 \5 M* {: V% I$ a
- } catch (e) {
* \: }7 E) l8 N3 W; B - ctx.setDebugInfo("error", e);
2 N! Q2 Q3 f4 R9 ~7 O/ u+ X! y+ C - }; n a0 n5 b3 ~1 [1 I( b- |
- }5 O% ~# V5 y) b/ @1 P/ c
- print("Thread end:" + id);1 w( C# R1 L0 M: M& x! T" s# m
- }
! V" X7 C+ k V; G# j7 [3 T - let th = new Thread(run, "qiehuan");# T1 @7 N: n% x- I0 e# `
- th.start();, m/ F' c4 I8 P3 a' H3 T4 i' o
- }
! ?+ O' I; r& [! J1 r8 b: s9 g
, `' g7 \: b! z+ Z8 M- function render(ctx, state, entity) {
# X2 x8 }1 n6 E2 ^ - state.f.tick();
& {9 T: Z8 i+ _ - }6 Y$ o, t8 L% Y* D7 |) v; e6 `' m
0 W8 [! f; k7 Y- function dispose(ctx, state, entity) {5 [7 J" p$ s5 I! @+ t' i
- print("Dispose");
) ~- ~% n% q1 {% y6 I - state.running = false;2 j# @' z, ]( } F' K) u6 O! @& z4 }
- state.f.close();
% j# [+ \- \' |$ Z& U, ~* L8 d - }; s9 N7 E9 t* _9 U
- ; d) v# l. J- ]) i. o1 @* D6 R% Q
- function setComp(g, value) {; G9 t0 Y: {. L. n. r6 B1 e A5 ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));
! ~" s W- w: Z) S - }
复制代码
3 ` w( j, j2 u) o l4 U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)* v* e, D6 `2 u1 Y" S7 B$ f- H
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