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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。$ x' W" W5 j& Q+ s1 [9 y8 d% J
- importPackage (java.lang);
! D) J# A8 S8 \$ ^ - importPackage (java.awt);
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9 Y/ y; a3 X w- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 v! j- r# \2 ]4 C
- ( X2 v) _: B7 I. m' f
- function getW(str, font) {
/ l- @0 W" ?/ K S1 N - let frc = Resources.getFontRenderContext();
" f1 Q8 X7 v- o h. _+ U& R" ?6 Z7 o - bounds = font.getStringBounds(str, frc);
3 ^5 f$ s: e$ A! t c. s - return Math.ceil(bounds.getWidth());
' M& H7 o& g' G; b0 D' v S3 O: p - }
: ]1 e: Y* k3 s9 \$ T
1 R% ]6 ?) R. ?2 H% ]7 [: V3 _2 \! N" B- da = (g) => {//底图绘制6 Y# H* V3 M, O" y( R: c/ n! z
- g.setColor(Color.BLACK);
9 @& H9 A% ]- w3 o - g.fillRect(0, 0, 400, 400);
' L5 L! x3 n) y* q - }' I( y: S% e3 n* p
- # M Z r& q8 `* m
- db = (g) => {//上层绘制
) L5 F$ F+ m8 K - g.setColor(Color.WHITE); J- w* d {' S, a1 \, i& ~ V
- g.fillRect(0, 0, 400, 400); f' g/ r* R' U' e
- g.setColor(Color.RED);
. q% D2 r6 q0 o - g.setFont(font0);
8 [1 A3 x2 X; z; y* X - let str = "晴纱是男娘";
! c$ Y8 W. R# I' J - let ww = 400;
' y- J; J0 ?/ i1 [ - let w = getW(str, font0);
5 r' k/ ^. H% ?# Q - g.drawString(str, ww / 2 - w / 2, 200);
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- 8 j$ C/ I5 v* r- t) H/ M8 E
- const mat = new Matrices();4 b& M7 s1 t0 ]* i2 b
- mat.translate(0, 0.5, 0);
( T8 B9 f) }. |- F- [
2 x% X* _5 o& T$ O9 `; \/ z- function create(ctx, state, entity) {" D1 L+ U4 }: T( d2 e* Z( ]
- let info = {
5 C8 P, @0 F4 X; G7 c5 s! B - ctx: ctx,4 Q/ O9 N$ |; h; z: r% Z
- isTrain: false,- k+ B! W0 }$ S! j1 H8 ^+ n+ ?
- matrices: [mat],9 ]" q+ z, }3 d( N4 r) w3 y
- texture: [400, 400],
2 m) U8 }$ I6 p! \0 s) W, ^ X* _3 ~ - model: {! {$ U9 w4 U) R# D- E
- renderType: "light",
: e, H: M9 z' X - size: [1, 1],( E: f3 n/ i! {- d
- uvSize: [1, 1]! T2 [8 D& _8 e) \# p( ~
- }
( I0 ~7 p1 ~: C6 ^' p1 f - }
4 W1 p8 s5 h# f& k* \& K z; x1 d - let f = new Face(info);7 v; |+ N, s3 b- G2 s
- state.f = f;; o- v/ u6 A, k* x: _! z
1 B$ `- `/ q: H( S5 Q# k- let t = f.texture;1 _1 q3 x3 Q- [* I( n( Z
- let g = t.graphics;
3 W( b) i9 F9 L3 h/ K8 M4 K - state.running = true;
2 v9 W+ ]+ K* H; [2 V1 A6 | - let fps = 24;
+ {& e+ S; e9 ^$ n9 c7 v - da(g);//绘制底图 D' |- t \+ S4 g
- t.upload();
) d5 @; [; @. l) E$ G+ z - let k = 0;
3 h! A/ L3 ~, { - let ti = Date.now();4 r# _4 G. @) ~* i4 R7 {8 v# l$ |
- let rt = 0;1 D/ P# M2 ~5 e! l( ]
- smooth = (k, v) => {// 平滑变化, d# `7 s5 }+ i3 v' T
- if (v > k) return k;% I- J# K$ ]. T- B( Y
- if (k < 0) return 0;6 M/ V# V; [( \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% J t* l' x$ q, l9 P9 k
- }4 W; n) f1 `1 q/ l' w* Z
- run = () => {// 新线程6 X% Y d# u+ X
- let id = Thread.currentThread().getId();
: F d+ r; f1 ^8 l6 D: `' ~- Z - print("Thread start:" + id);
9 x2 [. q, ]0 D# V( w* T) l - while (state.running) {* E) U. \3 D: m/ r& O9 o
- try {" R2 ?3 T8 T0 n) K5 O. Z
- k += (Date.now() - ti) / 1000 * 0.2;
6 ?* C( O/ V }6 Z; \- A- x. f - ti = Date.now();" X5 l# x8 G9 p% V( v' D0 T
- if (k > 1.5) {2 k' |3 z8 E. V- @* q
- k = 0;% c H& D! d1 _( ^- S( q2 Q
- }
$ y( [1 }- a2 R' Z" R: v - setComp(g, 1);
$ H3 j9 }3 j( j( z4 m - da(g);
! B" ^7 X$ P. g1 A* i5 d, r; s b - let kk = smooth(1, k);//平滑切换透明度. L" z; S6 D% S" J7 n& d( ?
- setComp(g, kk);! J! ~" l, a D' T; ?
- db(g);
2 b' m$ R$ D m0 D* ?) z9 E - t.upload();
# J5 [- r6 f0 z9 i. E - ctx.setDebugInfo("rt" ,Date.now() - ti);2 t; ~; J% M f- b
- ctx.setDebugInfo("k", k);
( j/ F$ o X a - ctx.setDebugInfo("sm", kk);; U; N4 s7 W k. U1 S8 n+ q
- rt = Date.now() - ti;2 V( N; o8 S, n* o/ A1 ~
- Thread.sleep(ck(rt - 1000 / fps));
. V& b$ Q6 P N/ M+ W- I - ctx.setDebugInfo("error", 0)
* K0 q7 c) K7 E2 W - } catch (e) {
! k' |. u$ O% {- K# U4 M2 C - ctx.setDebugInfo("error", e);# x7 \/ v0 }6 w. `
- }& e& _2 t# u( I8 L8 [8 c
- }
/ ^8 Y0 D+ j: \$ _$ N$ J5 ? - print("Thread end:" + id);
^% n8 `: v2 V# Z2 E0 F: v - }
. L, N& b" ^, X& |9 K - let th = new Thread(run, "qiehuan");) z) c- ?) E& f! W. j
- th.start();1 F& W0 l8 H# Y" j
- }
- f6 f5 G4 s% o9 t1 Q; W - ' [8 o4 u4 r* r& S" Y- C* M# @
- function render(ctx, state, entity) {
: [* K& b k+ N6 b' M6 Y) W# c - state.f.tick();
, t8 S" n% }% B" n- L: w - }
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; {/ k: |* P9 }& F0 r- function dispose(ctx, state, entity) {: H- i0 w+ T, I
- print("Dispose");( ?8 J! P4 E& `( I7 b
- state.running = false;
% q1 z* I* u9 e4 s2 x" ] - state.f.close();$ }* ~" R. r+ N; \% f
- }
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, ~1 v- G2 {- P! U- Z, U- function setComp(g, value) {
/ D* T% U+ X( |- d+ I* ~' f - g.setComposite(AlphaComposite.SrcOver.derive(value));8 L- r+ |# V6 c! ]& h
- }
复制代码
( c% W; } h1 @2 {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。. L3 M) Y, Z; V% b5 F: W* \8 Y4 T
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! s. P8 J! l- g4 `( H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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