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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。
# L3 D, `1 Y6 s- importPackage (java.lang);
' Z1 H3 V" z( t3 n+ H0 T8 W - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% U5 X, x {2 D) x4 _8 O
! p3 ?/ g' H& A7 t0 C- function getW(str, font) {
' g: ~) @$ o+ A: w - let frc = Resources.getFontRenderContext();
, G4 `$ [( C' {! P; A% B; d - bounds = font.getStringBounds(str, frc);3 g7 X2 {8 e& [% ~7 l/ ]: f: x
- return Math.ceil(bounds.getWidth());+ w' W' {7 T2 L% B+ F' y( r
- }
6 l9 x2 X3 L+ x% A7 J3 L - 8 o" t/ K! ?6 m* B& ^
- da = (g) => {//底图绘制
( L8 z/ h% G" p$ y* o$ M- ^ - g.setColor(Color.BLACK);- a; V* n4 s5 U w" f1 J- b1 `" ]% g0 _
- g.fillRect(0, 0, 400, 400);
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- 3 Y, W! H& R5 N; Y
- db = (g) => {//上层绘制
" ~% A) p x2 C1 |+ [/ ~% _ - g.setColor(Color.WHITE);. V6 F$ }' i: W/ ^& a
- g.fillRect(0, 0, 400, 400); F( d! z- p6 J- F5 I6 @" j
- g.setColor(Color.RED);
5 J* v; J; t5 l. f0 n/ {, G- f - g.setFont(font0);
- ?' _# V0 A6 |& r T - let str = "晴纱是男娘";0 R7 Q- L) ?1 l
- let ww = 400;
* o8 `% K4 J6 [/ m/ M# X5 m - let w = getW(str, font0);
4 ^" ~5 Q8 W& y - g.drawString(str, ww / 2 - w / 2, 200);
8 z% c! ~/ T4 F6 ^. C - }8 l# r( k9 P% }5 E. X8 w7 v2 \
5 i- p- K# \( I) i- const mat = new Matrices();
- f. H$ W' w' m1 h% e+ W g0 O3 F - mat.translate(0, 0.5, 0);
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: F3 j. t- g$ h3 `1 J- function create(ctx, state, entity) {
5 V( ^9 t1 g8 n2 v: ~7 \* T+ Q/ a8 A - let info = {
$ {9 R. s+ v! u/ O - ctx: ctx,& i; o2 D" L1 P( L- Y$ x
- isTrain: false,
# E- U4 a) w0 P( e" h - matrices: [mat],
" P" O$ V7 {$ N1 h7 G% I - texture: [400, 400],
; r% P* f. {" V$ d" k3 t7 T - model: {
( J0 w6 Z6 P8 Y( B6 t6 |# R - renderType: "light",
. v- ^) `6 a& J+ B4 W - size: [1, 1],
4 I S9 Q5 Y1 [- W) u# T- s - uvSize: [1, 1]5 l* C7 e( R6 T1 C. o7 C5 ^
- }
3 s8 u4 h" X- l2 d+ c - }
( U+ w$ u2 e& N8 F5 r" }3 m - let f = new Face(info);* W. c* X- Z- [* X' R' m
- state.f = f;
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8 B8 C$ \1 e/ w( z4 w6 G- let t = f.texture;3 @/ x+ \: _) ?3 l2 {3 B* K
- let g = t.graphics;4 I9 `1 Z3 W7 t. Q% W
- state.running = true;
. h- v1 ^' {, ^+ w' x - let fps = 24;
6 P' ]& b+ d) Z - da(g);//绘制底图( d7 u' x0 t! q' `' a- W
- t.upload();2 k4 C- {/ W, r1 _1 u7 m6 ?
- let k = 0; p" F9 H& B U0 Z* V8 W
- let ti = Date.now();
+ L. L* A/ G7 T6 c+ M - let rt = 0;. V% |- ~6 @3 X+ { r8 }& k* z- |
- smooth = (k, v) => {// 平滑变化
, z3 [( ], o& g3 u6 X2 Y8 _' g6 z - if (v > k) return k;/ w9 K* e: W) O
- if (k < 0) return 0;
! y3 v% S- g6 X* e, x - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* V7 p5 U: t8 z) o0 F: K" u2 ?
- }, i. h- q% R2 h) `! Y! h
- run = () => {// 新线程
: n$ }- C% i6 I! m9 D( B - let id = Thread.currentThread().getId();# r$ w; t/ k7 K9 [
- print("Thread start:" + id);
2 t2 z; ?+ u8 t3 p$ ?! Y9 i% l" i - while (state.running) {# U9 S' k' S# M) |
- try {- i" d4 I$ ]0 _/ e2 T# A/ w, {
- k += (Date.now() - ti) / 1000 * 0.2;
" e" e7 v A( y - ti = Date.now();
, K5 z* Z' D: l/ u9 @7 e( U - if (k > 1.5) {) S1 L2 z# c3 l+ e/ ?
- k = 0;3 b, o7 g& N T7 M
- }1 A- v* s0 ~: s" b v
- setComp(g, 1);/ ^$ m+ W |! C: b( F
- da(g);
& S6 u8 p- E9 P0 C - let kk = smooth(1, k);//平滑切换透明度
8 i- k0 X6 n6 A+ T - setComp(g, kk);$ q9 S# L4 M1 }0 w' h
- db(g);2 w, E+ m1 {) H& V' ^; @! Q7 a
- t.upload();
6 g1 w( d; x8 y2 }7 }; ?! g - ctx.setDebugInfo("rt" ,Date.now() - ti);- ?' L1 q6 \# F$ \' {/ H; J
- ctx.setDebugInfo("k", k);- B2 i0 q3 C2 D; j2 ~- m
- ctx.setDebugInfo("sm", kk);
: k2 h9 a( G# A. { - rt = Date.now() - ti;8 F& h! k4 n7 R
- Thread.sleep(ck(rt - 1000 / fps));9 l2 R+ \' O6 O9 v5 i K
- ctx.setDebugInfo("error", 0)4 i# v% t7 }; A: z( c9 k; \
- } catch (e) {$ c( M4 o% U: T' h* A$ I
- ctx.setDebugInfo("error", e);
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");3 V% V# G2 C S+ B: `2 P
- th.start();
- F+ A- o, X: O3 o - }2 K: o) z7 u" e
- : I+ [( _. x& @: `% a
- function render(ctx, state, entity) {/ M& `3 W2 M: w; d9 T" C
- state.f.tick();
* N& t; H) V# k - }2 A' U0 A& i# ~9 f5 K$ ^; O: m
`: {; q4 M9 J$ ]4 E1 a/ ]& B: o+ J% ~- function dispose(ctx, state, entity) {
0 i( C- h. L; I- B7 z - print("Dispose");
0 _; S% n! l* v! |6 z - state.running = false;
- q' `7 u! i7 s - state.f.close();
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# }: K7 M, r/ h- function setComp(g, value) {6 e7 ~7 G5 L% v' }% d5 ]
- g.setComposite(AlphaComposite.SrcOver.derive(value));
/ h3 w6 m5 N2 X: M4 F* {/ d - }
复制代码 ; q# w0 c" t) I0 t5 c
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。/ p. \: s6 b, h1 Z+ P2 S8 i
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9 F6 \( f% D! r) K顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)" u3 M6 J" l7 e$ ` e: q
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