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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。% ]$ g1 A7 c; Q7 i8 |" a# D7 Q6 F
- importPackage (java.lang);6 R8 G4 s" q$ h7 J2 x
- importPackage (java.awt);
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2 o5 ^6 L! J* ], G- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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( ?4 y8 d) d! p* c0 i, m" S& I- function getW(str, font) {
8 Y2 e$ s$ D0 e6 B - let frc = Resources.getFontRenderContext();7 _' _% s- S9 u* t
- bounds = font.getStringBounds(str, frc);+ x" T* ]" g# m6 c C2 i8 X4 P3 F
- return Math.ceil(bounds.getWidth());, `. W# i5 K. }" |, o2 M2 ]
- }$ B3 t: O7 c# S) M; Q6 V# E
- 7 i8 J: ]7 ~+ j2 \) i
- da = (g) => {//底图绘制
8 ?5 ~% M/ G' S* N* @) y5 x - g.setColor(Color.BLACK);& g0 O& ?8 D2 I# Q! q0 x0 c
- g.fillRect(0, 0, 400, 400);& d4 E# X$ `! X$ B9 B' U$ j
- }9 }" K8 _2 c: C! C( O5 S
- ; F( M+ D+ e9 o( h+ k9 z
- db = (g) => {//上层绘制
- e6 v5 c9 j; Z! F! o3 o - g.setColor(Color.WHITE);0 F& k' _) J2 ]) i# {" |
- g.fillRect(0, 0, 400, 400);* ~1 }6 k9 |9 J# g0 U
- g.setColor(Color.RED);
4 J; ~* l. h& i9 X6 T7 c - g.setFont(font0);
. W8 a4 V8 H# {0 F - let str = "晴纱是男娘";
9 W$ X, _8 B) ]2 p1 G4 [ - let ww = 400;, o, I+ B: a/ C, f) K/ j7 ?
- let w = getW(str, font0);
( ]' P: L, M2 y% Q - g.drawString(str, ww / 2 - w / 2, 200); }0 t% Q% I1 c9 r) Z) m7 {% ?
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- ! O4 ?+ C& T( a2 \* T" \
- const mat = new Matrices();
9 s) M6 _6 a# g) Y e1 Q - mat.translate(0, 0.5, 0);( C* [* s$ @2 f# R1 A8 L! R
8 G/ u2 p! B4 d7 _- function create(ctx, state, entity) {
, r* U" f- [! D$ {0 x6 p& d5 v - let info = {# b4 d% c* p, U# H
- ctx: ctx,7 v9 s8 m+ ^: P8 S2 q7 P# @$ D
- isTrain: false,& f5 q/ Q( d$ X
- matrices: [mat],
1 \2 O- k( \( f$ C& e% g4 ~6 S - texture: [400, 400],
/ H+ w- Z$ P- G) J - model: {
6 H+ q$ q: ?- U& \. U - renderType: "light",0 y3 }! I' W$ V
- size: [1, 1],
^6 S* K) y9 D9 { - uvSize: [1, 1]5 ]2 }$ ?- R* N
- }/ D& |& Q: @/ P% Q. F! i) u
- }* c4 W! M2 l/ A$ a) J
- let f = new Face(info);
, O5 h$ \* E6 U - state.f = f;
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- let t = f.texture;, a, L! G- c; U" k
- let g = t.graphics;& W3 P7 T, w) @( K: x; N) p
- state.running = true;
% S4 g8 r0 N0 _4 X5 T - let fps = 24;+ V" q l. \8 a5 u/ M- [4 b
- da(g);//绘制底图
) |( P* v9 a3 C8 c2 A- j* x/ H+ H, I: t - t.upload();4 P0 a$ M& Y6 ]* F q
- let k = 0;
! Z! P$ Q+ {9 e1 P7 t% ~- V - let ti = Date.now();' n) ~# D' q# G
- let rt = 0;# _( g2 y+ {: W5 h! z" h7 H9 ^
- smooth = (k, v) => {// 平滑变化
5 E9 j. H# v* Z' y; g - if (v > k) return k;6 `+ o2 S2 O8 r _7 B
- if (k < 0) return 0;* b: L& x' o1 w1 s1 @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- J1 I" g0 A; c7 H M" S
- }
% G7 }5 n' H. j! K( K1 Z* ~ - run = () => {// 新线程# I; X; ]. a2 C7 _6 `
- let id = Thread.currentThread().getId();
2 n; F- T9 v; P - print("Thread start:" + id);
' H7 N# U' X0 a0 i - while (state.running) {5 H* K) |+ B( _+ `. s) ?1 w
- try {, \- Z0 }0 S! n
- k += (Date.now() - ti) / 1000 * 0.2;( D/ }! i3 P- [( H' Z
- ti = Date.now();
0 o0 ?5 Z e" w4 S - if (k > 1.5) {
) R- w7 O* I' L, { - k = 0;
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- setComp(g, 1);$ K5 [+ s: h* ]9 g" w- D% r# _
- da(g);
' l7 _, ~; X5 n9 Z* a - let kk = smooth(1, k);//平滑切换透明度
" e8 f; t2 E* q - setComp(g, kk);0 v( g: I+ m* o# l- E0 ^
- db(g);
& }$ }: N( \8 U6 g8 v5 n! K; t4 @! ^ - t.upload();) j- B6 p0 V# v( C$ o
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 M: D6 F# l2 _, E/ X& G2 U4 w% o - ctx.setDebugInfo("k", k);
6 @2 E$ ~0 w& V& I. c: L - ctx.setDebugInfo("sm", kk);" e# a5 _2 V2 |8 t
- rt = Date.now() - ti;% T) W- s8 U/ i( z0 l% m' d& R
- Thread.sleep(ck(rt - 1000 / fps));
# C3 `. ?: x; b1 E7 U: X0 T. h - ctx.setDebugInfo("error", 0)
9 b- j# p6 s, P" `: o - } catch (e) {' C, j: E1 P: S' k3 r: `9 g
- ctx.setDebugInfo("error", e);. ?' Y2 P: g% E8 } ]4 U
- }; u& ~' m" l# q0 A) w/ m7 I7 E
- }2 B3 f- ?3 K" m3 ]1 v9 {( b9 b
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");- O1 f* L: X @! G( E
- th.start();( O$ Q9 q. a' ]# J" v
- }
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( `. f) I0 U& j9 @3 |' w- function render(ctx, state, entity) {3 a5 Q; a' c; t& |
- state.f.tick();: n P9 U: r$ z; Q6 W) _
- }# n8 y- W6 L8 _1 h5 H
7 i0 k$ R$ G$ |- function dispose(ctx, state, entity) {
$ O P7 I/ W& K3 N- _ - print("Dispose");
" k" x7 L# |# r% {& o/ c" X* i - state.running = false;7 k0 t* R, F; v9 V' h( [+ t
- state.f.close();
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* c: b2 G/ _3 ]# I' V8 Z3 w- function setComp(g, value) {6 A8 @1 H2 |0 \: Z: O% k) ]) E
- g.setComposite(AlphaComposite.SrcOver.derive(value));/ h) e9 E( t0 F8 x: E
- }
复制代码 & S( I0 u: i/ l5 ?
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。3 w* H ^) `! F; ~1 W! F0 i
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% g! o$ C7 K4 K( H' o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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