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- G4 G+ C3 \7 \$ E- l. l+ x0 \9 L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。* {( ~9 a L$ b; ~
- importPackage (java.lang);! T q$ C& h) M% o* H
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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5 @& |+ R; r7 {* o0 q+ H) ~- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; X }1 |' k! P7 [$ G- P
- O( ]4 R$ M9 ~6 _1 x/ J
- function getW(str, font) {6 \1 }( G: T4 X% t- K
- let frc = Resources.getFontRenderContext();
1 o2 d* e) a' v1 i - bounds = font.getStringBounds(str, frc);% {8 @: j/ o0 i. j7 Z$ D+ \
- return Math.ceil(bounds.getWidth());' j7 D% L" b. w
- }
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2 k1 Z. W, T7 B3 Y% [- da = (g) => {//底图绘制7 ?) F1 l5 H* I" m% Z
- g.setColor(Color.BLACK);+ t) L9 t) T- }3 x4 P4 [' U4 A1 H
- g.fillRect(0, 0, 400, 400);
9 A& b/ v$ d. `) W+ H- i" ] - }
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5 l0 H! T1 {$ l. m8 ^. Z" n- db = (g) => {//上层绘制1 c: s3 x! Q) C4 n: v2 i
- g.setColor(Color.WHITE);
+ _1 X7 g. J! ~8 q- |2 s1 k1 F U) F - g.fillRect(0, 0, 400, 400); B( i5 z3 d' o S# E( ^/ W" ?
- g.setColor(Color.RED);7 U6 R& v1 D. K
- g.setFont(font0);
& l! \! G' m$ f - let str = "晴纱是男娘";1 E$ \0 n4 ` A3 B2 T
- let ww = 400;9 U! c/ t7 h" l6 h
- let w = getW(str, font0);
! E7 n0 B+ z7 Q* j9 D! l0 a - g.drawString(str, ww / 2 - w / 2, 200);
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- 2 a: ?' ]3 u ~* i4 ?; a6 g
- const mat = new Matrices();3 N/ Q: ?/ y0 R" s. \& G1 f& R
- mat.translate(0, 0.5, 0);9 P3 D- O/ X9 r, @& _' ]
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- function create(ctx, state, entity) {
7 T4 Z; L3 b! s1 A - let info = {
7 C7 x9 z$ h- D) A }3 R - ctx: ctx,
( Q: q7 b6 m" h! Y7 v& l - isTrain: false,# ]# q' E, [% K) e% u
- matrices: [mat],$ L8 S$ S( b8 Y1 |, E
- texture: [400, 400],
: Q+ d' F' [- ]" P3 r - model: {5 [5 L7 M: ^' M/ J$ O0 g
- renderType: "light",* X5 L) Y* }( k0 _' i4 o7 u
- size: [1, 1],
3 D- k0 y. ]6 e - uvSize: [1, 1]+ I+ N8 P( i+ t' P9 Q& V
- }+ j) p1 ?- l/ K2 w% {$ ]
- }( t; }5 R8 s: ^+ |- S4 @/ Z$ I9 _
- let f = new Face(info);
: _4 o) X- `9 L1 ~ - state.f = f;. P0 D; y( w. X
- x# ^. a# e; q# m1 t5 {( a
- let t = f.texture;
! e+ w( ^: K# G T - let g = t.graphics;6 v: ?! e0 j3 T' ~4 i, ]0 \7 w
- state.running = true;: b* [+ ~, U0 O: `: q
- let fps = 24;, ~* C0 y) w& f) E: j
- da(g);//绘制底图5 ?, `3 ?/ R2 o. Y- o6 y
- t.upload(); l" g. I$ D V# M/ D/ d
- let k = 0;
2 l6 E( b: l9 C9 v; G4 c - let ti = Date.now();( s5 D; l% {& O k2 z; f; z3 {) q
- let rt = 0;( s. h; Q+ N4 k% _/ L- g
- smooth = (k, v) => {// 平滑变化! C P$ S' f1 r; J
- if (v > k) return k; M+ Y4 ~6 Z% E, \+ @& a, W5 @
- if (k < 0) return 0;
: b# n; ]' v0 F# L8 i - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
) v' ~$ @- o) Y8 V+ J! h g - }
3 j: Q# P6 k' {* c: |0 J - run = () => {// 新线程- X9 g7 G6 W0 `/ l
- let id = Thread.currentThread().getId();; H' T5 V; W7 @7 T" o
- print("Thread start:" + id);
$ @! ^7 \' O6 h! i0 ]/ A8 C - while (state.running) {3 N x/ D; e4 w' L; B, t
- try {5 R1 X5 E+ r2 \3 x
- k += (Date.now() - ti) / 1000 * 0.2;) F# \( R7 N8 N. d# L
- ti = Date.now();
) {. O ` ~: \8 k. j" T) x - if (k > 1.5) {
& u* N4 t. g6 S - k = 0;
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- setComp(g, 1);' F5 ?5 `! {& @/ Y- T
- da(g);
9 i& B& J4 v+ ^ - let kk = smooth(1, k);//平滑切换透明度
; ~9 v: Y& {1 h: K - setComp(g, kk);
7 C1 S# x' Q0 l6 h, e" |7 R - db(g);
# N8 ]* t- L+ Y# [ - t.upload();
/ z0 Q: g j! _+ d% O - ctx.setDebugInfo("rt" ,Date.now() - ti);$ j* R* j% e; K' g% R: `; e# N
- ctx.setDebugInfo("k", k);3 z2 x/ M/ |9 J6 q% C' X4 i
- ctx.setDebugInfo("sm", kk);* @+ D/ i0 @" D4 A* q" ^" J" U- W' ~
- rt = Date.now() - ti;
" J- T/ }' k& `9 k - Thread.sleep(ck(rt - 1000 / fps));$ c3 I4 s9 Q3 E4 ?5 Q5 P
- ctx.setDebugInfo("error", 0)
, B& o; j# S3 X( L; a4 I - } catch (e) {
# Z% v% S/ v2 m4 D& s% V - ctx.setDebugInfo("error", e);' H/ G4 p9 |# t0 n3 x3 G
- }
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- print("Thread end:" + id);
4 `$ G1 m+ \" x. a `+ s) q9 r6 W+ c - }
. p \( {2 {9 ~2 p - let th = new Thread(run, "qiehuan");, H/ c/ [9 D2 D; n
- th.start();! Y2 d3 ]& G% T* C" ~
- }$ f; o* v4 k. ~1 V, m9 x! n8 }
1 B2 N& v7 d/ T" m6 o b9 p. y- function render(ctx, state, entity) {" g- P" @( {# ^
- state.f.tick();2 j& W t$ g: N. ^8 ]
- }
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- function dispose(ctx, state, entity) {; d; @/ L% Z2 @6 o$ o
- print("Dispose");
/ |; P7 M- I! U+ o) l& ^( X - state.running = false;
- F% |/ j; \+ o- h/ K - state.f.close();
- ~) T6 b3 R, b3 o - }
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- function setComp(g, value) {
2 z- o8 A* A4 x - g.setComposite(AlphaComposite.SrcOver.derive(value));2 c: _- N0 t" y) t; H# m
- }
复制代码
7 U" p* @# t) o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)
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