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! a1 X6 |9 u' M3 g- [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。
, F5 R, G5 E" U5 w; q2 t- importPackage (java.lang);
7 S: Q8 B7 G: s# b( ` - importPackage (java.awt);8 t, M6 N; G, }$ a: f8 O
- ) v5 y' p! i* J% Z7 A+ r
- include(Resources.id("mtrsteamloco:library/code/face.js"));
% C& W) [ h/ `7 r1 @; t5 q
, D0 D$ g/ ~) Y4 Y: R- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {8 c: x. c& |* V$ _% n' H$ Q
- let frc = Resources.getFontRenderContext();
+ L2 [6 o7 C% d; r2 V7 F - bounds = font.getStringBounds(str, frc);
4 r0 d) c) T+ ]/ s! | - return Math.ceil(bounds.getWidth());
1 D$ _# N# M4 ]- M: H - }
3 F, M- k) }) @
T; x& Q S; E& Z: v9 C- da = (g) => {//底图绘制, i0 B! I7 Q5 B, D# X$ P- T
- g.setColor(Color.BLACK);' h* R9 }- |, K* t- o3 B& m, ^/ Y
- g.fillRect(0, 0, 400, 400);
8 o! j- y# |8 c) U - }/ Q* }$ d& K5 N, U5 g* i" K$ R
- ; R" ]8 {7 g3 a" P$ F5 Z i+ W- _
- db = (g) => {//上层绘制) R" Y& A' q, ]
- g.setColor(Color.WHITE);
8 {. D9 {9 F8 b$ u - g.fillRect(0, 0, 400, 400);8 i3 U6 @, |6 R* W! p9 o, w
- g.setColor(Color.RED);
8 B! Y0 U/ ?# P6 g8 H2 U - g.setFont(font0);
; @. B* j5 Y- W6 f' }) w" K - let str = "晴纱是男娘";
$ F5 }$ v5 M0 w0 C4 i# T - let ww = 400;5 Q2 t9 S2 B7 Q
- let w = getW(str, font0);% G1 ?- ]9 p: _: n
- g.drawString(str, ww / 2 - w / 2, 200);( o$ m, v7 ?7 [" R2 }2 M
- }: E: M/ H3 H& O: z2 m7 y$ v
- 9 L* a y, Z, N: @
- const mat = new Matrices();) z3 ]0 u# L9 Q# S! L5 ]* {
- mat.translate(0, 0.5, 0);
- k7 p* t1 H( `' ^/ [( w1 E
6 R+ ~4 t; }. ]% h" g- function create(ctx, state, entity) {
! V$ h6 y) d$ m* n+ q - let info = {; Y. F) i7 |; v, ]/ p! |4 o
- ctx: ctx,
# F3 o# ~0 K X - isTrain: false,
/ N! G+ L9 A( K' Q1 C4 Q; N8 A2 P - matrices: [mat],, R5 u1 x9 h; t
- texture: [400, 400],: \& ~9 |1 @ Z! N7 K6 H. K
- model: {7 ?& W- z% J. r9 c/ Z
- renderType: "light",. l. k4 N8 G& Q
- size: [1, 1],
6 Z3 }* @) j; O" P: x, C; {$ Q - uvSize: [1, 1]
5 }3 b& T7 b3 @9 V* R - }
3 Z5 W) k' H3 X/ n9 Z - }
( M' l; [% s9 C - let f = new Face(info);
6 ?( X& i, T& a5 S1 [5 r% O - state.f = f;4 T1 B" ], E* J5 e6 y) f( |, _
6 m) G/ c1 Q# K. d- let t = f.texture;
5 }' w/ @; u# X - let g = t.graphics;
- ^& r- {8 s% e* H& p3 M8 @ - state.running = true;
; X( ]6 m- {* c$ J, c - let fps = 24;& s& I+ D4 r! ]7 H" x0 L* h
- da(g);//绘制底图- W: t9 U# X g+ Q/ I
- t.upload();
j& c6 g# \4 u! Y1 Q - let k = 0;
& V j% r9 c) k - let ti = Date.now();
" p" x4 _+ C; v/ [ - let rt = 0;, L8 e" r2 |3 @; Z" [
- smooth = (k, v) => {// 平滑变化
( @/ F* b# I; L- K8 p - if (v > k) return k;
$ ]+ g8 @/ H/ p1 v; } - if (k < 0) return 0;
! e* [* j( X7 G9 b3 m7 U1 p" Y - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 {* {- `: b" _8 R) B
- }+ x$ W9 `& g* s: U0 e" C
- run = () => {// 新线程/ B8 O( |! ]& j
- let id = Thread.currentThread().getId();
, @6 B- l1 p1 y; z- c# M0 Y - print("Thread start:" + id);7 j/ N& u @( l4 C
- while (state.running) {& W$ i- H' W- y
- try {" c: Q9 J+ ?! x1 T% T! b
- k += (Date.now() - ti) / 1000 * 0.2;
& q9 F# _7 t. \# j D8 B - ti = Date.now();; E* K) K, s) z4 l7 a: ]
- if (k > 1.5) {8 G: u! Q @7 J, @2 @$ @4 y& w
- k = 0;7 h1 A; `/ |6 J; e* a3 t0 w" s
- }
5 b+ T R; r" ?4 V1 M - setComp(g, 1);: |' U+ x* y9 M8 l# k
- da(g);. J& V3 Z; N1 c* y; s
- let kk = smooth(1, k);//平滑切换透明度0 @4 L# X N4 d# l5 s# w
- setComp(g, kk);/ f! g3 ]' b1 A3 Z' ~# ~# u
- db(g);
& ?- @+ d4 @& X* K) e. Q - t.upload();
0 B. W3 R& @; ^0 Q. Z - ctx.setDebugInfo("rt" ,Date.now() - ti);3 ^; g; j1 E3 _5 \+ o
- ctx.setDebugInfo("k", k);& j1 z, b: j! p* Z3 M3 T6 U
- ctx.setDebugInfo("sm", kk);
2 ]8 L9 L& F2 }+ y- P" h* P - rt = Date.now() - ti;
- q$ F: \, l& O0 r+ c- M - Thread.sleep(ck(rt - 1000 / fps));$ a" O) D) H! v1 `3 {( |
- ctx.setDebugInfo("error", 0)
0 N: C, O9 N7 [* P: c, ?# V - } catch (e) {# \% m/ ~) w) j+ C/ e. g' X3 q1 L
- ctx.setDebugInfo("error", e);4 I0 I% X7 I' E0 N/ _
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
' ?) t/ _0 q; Y& l4 k6 { - th.start();
3 U5 Z8 B: \5 |0 @1 f$ ?+ B - }; d8 r$ o9 ]9 X8 {" s. A
8 N: w! n6 ]6 |* a- O- function render(ctx, state, entity) {! \/ c& d4 `( n+ ~& Q+ h
- state.f.tick(); k2 ]* J: B; j: Q* _% M8 n
- }0 r. }7 C! H/ T/ p; S
+ F: o: C! w9 R- function dispose(ctx, state, entity) {
' x6 C/ V0 [/ I; i) S7 ~8 e$ k: B - print("Dispose");
) x/ ^4 E4 s* [- C9 |6 l - state.running = false;
6 o3 r" y; V% j0 @ - state.f.close();
9 @ H4 A& }: C1 n7 ]( \ - }" Q5 X8 @. ?6 t3 S/ H) `/ i8 P7 \
1 I6 d% [, {0 R$ n0 ?- function setComp(g, value) {, X$ X4 H2 m4 t) B2 u( r9 g, ]
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: _$ w2 L- s' b$ M* [ K - }
复制代码 & u+ o# E8 p5 C+ z7 {' x& U# R$ `
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。2 u' \' _- H' _6 Z& `: h
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7 r' k$ @: H2 R1 R, j顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)0 B3 D4 o) F3 e3 q( Y
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