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; ^# Q! c! y6 z4 G; H' b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。 V7 q7 r; s# c; j" F& S
- importPackage (java.lang);
, c0 V& L9 v F+ q4 o. D - importPackage (java.awt);% Q/ i+ w. @: C
5 x x' x, m5 P/ A; I4 I- include(Resources.id("mtrsteamloco:library/code/face.js"));
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* J, i% f) ~, [( Y) T- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% }8 j* j6 V2 R( D
: I3 N# [+ N+ G( }6 s: I1 {- function getW(str, font) {
* o0 {# V$ x: Z# c* G# y4 L2 Q - let frc = Resources.getFontRenderContext();
) J, r! F/ ]' p4 }3 k: q - bounds = font.getStringBounds(str, frc);
. r- s& u/ |& M9 Z - return Math.ceil(bounds.getWidth());
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- + J1 u# G7 f' N$ H4 V% o4 R* | F
- da = (g) => {//底图绘制
4 L3 t' f3 H7 X* a: y: B* Z - g.setColor(Color.BLACK);- f: Y# P( W5 p& u7 D
- g.fillRect(0, 0, 400, 400);
) v2 K; c& g" d& r/ d - }7 G6 T% K2 g. M! |* x/ ]
9 J8 [( I& M; n) i) M# @$ s- db = (g) => {//上层绘制
/ C9 R6 h2 ~) Y6 W - g.setColor(Color.WHITE);
- p( f2 F! q( e+ M - g.fillRect(0, 0, 400, 400);
; q p# F+ T s, z - g.setColor(Color.RED);% f. { K3 \- \2 j [4 Z; c
- g.setFont(font0);$ a3 g, X; _, x
- let str = "晴纱是男娘";
, J' o) C3 D* u' @2 J8 v& n - let ww = 400;
0 U2 j% {! y* C" `. S/ L1 O - let w = getW(str, font0);% A& y" t* X/ N; Q! Q: Y" N
- g.drawString(str, ww / 2 - w / 2, 200);+ d! j# H1 s: ^# `" i
- }
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x: G$ [# e) P4 m- const mat = new Matrices();; J4 g3 P: F$ w+ O' Y. c9 M
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {5 i( R1 t4 W8 M
- let info = {
" E% B$ m8 b; p% j! P: w - ctx: ctx,- m( l; r, P4 X
- isTrain: false,2 b" M2 a) p, U& y6 o6 E
- matrices: [mat],
6 @( ]- U0 C# _" _1 b - texture: [400, 400],
: U9 k! f$ G/ q3 t+ T' e1 U9 w - model: {' }3 _# D: H6 q* {, C% S' V& U
- renderType: "light",
E/ b; c% }! V3 T) N9 S" `' g8 l6 ^ - size: [1, 1]," c- I/ M; J- S' |
- uvSize: [1, 1]# l% Y: o1 n9 m' q3 O2 L
- }3 N% w* Z6 B6 b1 L! A& g
- }
- Z' l3 [ T, k2 M/ j: G - let f = new Face(info);
# f6 ^6 C9 ]& E- |. ? - state.f = f;
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- let t = f.texture;( M) J- a, M9 q8 {3 o- A
- let g = t.graphics;1 E1 \3 \! `' i" \
- state.running = true;" I9 C, q' F9 C
- let fps = 24;( ~6 k- X7 `/ S& F2 R* G. j! ?
- da(g);//绘制底图
( }! u7 N, t5 t2 i - t.upload();
$ [' M) {4 b5 P; V0 r" j E8 t - let k = 0;
) ]; A1 o, i8 j' [ - let ti = Date.now();% S4 x; z. Z ]5 u# H
- let rt = 0;( I" R2 m1 J/ H1 ?
- smooth = (k, v) => {// 平滑变化
0 _6 g# [) `* J+ `( Y - if (v > k) return k;+ n+ h2 `- ~! E/ q2 ^
- if (k < 0) return 0;
: [& U9 c4 K z# H4 q- s - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 X8 ]0 y. t6 C8 ^ - }
5 E2 Q! `: i, m - run = () => {// 新线程
& b0 s) L8 u. _% I( M1 o - let id = Thread.currentThread().getId(); B* C5 o( q2 C2 s9 ]2 D0 g
- print("Thread start:" + id);, m1 F2 Q) ^) i; N
- while (state.running) {% l# z& W" x+ ]& z. h" c. \* J
- try {
1 G3 S5 p3 x7 U, Q - k += (Date.now() - ti) / 1000 * 0.2;
! f: j$ M p6 m/ E3 e; M/ o - ti = Date.now();, f0 w. D! @4 ]$ g1 ^
- if (k > 1.5) {
4 I8 e1 k3 r1 N/ q2 @ - k = 0;4 d8 E# h" \) E$ M$ b0 l" l+ k
- }* q s: A. y5 \5 x7 h
- setComp(g, 1);
0 f8 Z6 \: W, ~; @5 k# [! |- `/ L2 F - da(g);
' f* w5 { z& W! M1 [ - let kk = smooth(1, k);//平滑切换透明度4 F' r4 c; b* o- f/ x
- setComp(g, kk);
$ j5 P. V& @- E+ ~2 V - db(g);: r- T: U. v; D" a
- t.upload();- [2 `$ s7 |! i$ M
- ctx.setDebugInfo("rt" ,Date.now() - ti);
7 d+ h9 T! g) F - ctx.setDebugInfo("k", k);
( o4 s: i- {$ _' X: U/ r - ctx.setDebugInfo("sm", kk);2 X3 f/ U+ P3 q, Y8 p
- rt = Date.now() - ti;
7 S) q% w+ v5 f$ j+ | - Thread.sleep(ck(rt - 1000 / fps));& _7 U9 V6 J9 \$ A6 s
- ctx.setDebugInfo("error", 0)! H* s) Q D$ f) B+ f6 M( c( _
- } catch (e) {2 K* n* N; z: Y
- ctx.setDebugInfo("error", e);
5 H, E" d" n F6 ?& j2 |+ o - }
% C2 U7 i* ^4 c - }
5 ?3 a% `' T2 J2 C& u+ |9 F - print("Thread end:" + id);/ b3 r3 I) i1 R7 W
- }; Z+ c- ?" f# u3 U5 m/ s# q
- let th = new Thread(run, "qiehuan");
) E9 w; Q6 F' x, @7 x - th.start();
' D3 P. h {" v+ M, s/ f9 ~ - }4 T+ l, W. ]$ l0 [
3 P% d7 @5 O5 T; z( b- function render(ctx, state, entity) {# n7 a! P* N6 D' B% ]' D U- U
- state.f.tick();$ o6 N- |- M- J; |
- }1 V! }9 r/ |; }; q. p
- " p, s6 `7 e8 J. v8 k
- function dispose(ctx, state, entity) {
2 \' v% U, ^% l* k* Z6 Z4 {1 j - print("Dispose");
; R5 G o# X# `; _9 F) _ - state.running = false;/ Y8 l3 v0 r9 W7 X3 K. ~8 R% g
- state.f.close();3 o! T+ {2 ~) g% i
- }
* Z! |$ c. ?8 N( O4 _: q# ~ - + x0 z. _" _: M6 }
- function setComp(g, value) {! ]- a( ?9 v$ B' R8 H$ c$ T
- g.setComposite(AlphaComposite.SrcOver.derive(value));, X7 z3 S6 m7 p0 U# P0 |
- }
复制代码 + B! U0 ^+ m6 @
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。8 T9 P8 s8 M: r- l
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& ]2 _/ z; n" i) ?3 |6 l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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