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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。
) B, J: Y! }8 X3 z1 r! |1 Z- importPackage (java.lang);" K: t% Z3 t; }
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));2 v( c; Q( n( H" _/ Q7 m
- 8 Z" ]% S( U; n. ?4 @ m+ M1 Q
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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' y0 F5 k- n y' I/ I- function getW(str, font) {- V& M- L$ [9 ~( x1 x- @9 ~9 t
- let frc = Resources.getFontRenderContext();5 c0 K8 l6 N2 L: A6 m$ U2 g. y
- bounds = font.getStringBounds(str, frc);* L7 w/ ^4 f# [; x" B8 D9 q S2 O
- return Math.ceil(bounds.getWidth());
+ [! w0 u* v2 O/ w% ^0 k5 A - }( i" r8 I5 D- d5 u/ o- e
- , B3 r) _- @2 j! v
- da = (g) => {//底图绘制
" v# i1 J3 f# g6 d- M - g.setColor(Color.BLACK);
1 \' Z t1 Z' v# T- O2 g - g.fillRect(0, 0, 400, 400);5 I$ ]7 p0 I" W% l& w; q
- }1 s" {' e$ j3 M% }
- # b* v0 Z/ w8 p+ l6 j
- db = (g) => {//上层绘制
; `9 ~8 y$ D' \; Z: t# ?. M - g.setColor(Color.WHITE);
! P6 b# O7 |, M - g.fillRect(0, 0, 400, 400);
% L+ W% q+ ]+ c) s" t) y: B% a. t6 b. l - g.setColor(Color.RED);
. A7 _. S8 f8 W" s" B$ {3 m- Q - g.setFont(font0);
7 A4 [0 q) ?9 [+ Z ]8 i% x - let str = "晴纱是男娘";
c' ?) w- e4 i6 t - let ww = 400;. J: b' v! x6 G( K5 g
- let w = getW(str, font0);
. V$ j" ?) z! e$ N+ B - g.drawString(str, ww / 2 - w / 2, 200);3 ?) _: U& d+ I- {: q% M8 O7 n
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- 0 k: ?- B, A' L+ g- L9 R& @
- const mat = new Matrices();) v; J/ [" z+ e! U: C7 h0 H, Y Q
- mat.translate(0, 0.5, 0);
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: k9 U5 f0 G1 g ~9 C- g5 z# R8 g- function create(ctx, state, entity) {' f7 q* L3 U- d% L& o; D
- let info = {; J2 ?* W% {5 w& E& Y0 n& o* ~4 B
- ctx: ctx,. ?! q0 Q8 R. w
- isTrain: false,
) n% Z# m5 R- w) @+ T - matrices: [mat],, u% s) ?) b; n& O
- texture: [400, 400],
2 F+ T7 x: G6 H8 Y7 }0 Q - model: {' B& E3 V, `* k5 v, h9 j8 e
- renderType: "light",
. C! |2 C: Z2 k - size: [1, 1],
# |9 {. N5 o7 m+ x6 } d - uvSize: [1, 1]
5 _% {" E) o1 J7 G - }
, G% r+ A. j4 t7 m( E; |; h - }
1 r5 E2 E; Q* }/ I F - let f = new Face(info);# [: J/ ?3 l3 I9 {. m& m
- state.f = f;+ a x- C' y+ A# T! H
( i5 M3 P, C$ ]3 O2 r- let t = f.texture;
& ]8 Q) I: |. }3 {) v8 W - let g = t.graphics;* ^2 e, e0 S# `, C. c2 J3 y
- state.running = true;
) s* s$ n' {0 ? - let fps = 24;
$ d- J; ?1 Q. a* p - da(g);//绘制底图) d+ T0 S% P5 T" K4 q* f
- t.upload();; {! o& |3 l( x/ g2 V
- let k = 0;
- a, x& ~& N' u l* i - let ti = Date.now();
+ B, n8 x) {$ ~1 j - let rt = 0;
2 `. I! h% L3 ^( m8 [% Q! z' U - smooth = (k, v) => {// 平滑变化
) V: B! V I% ?3 f( {0 ~& k, y' R - if (v > k) return k;$ Q9 ~0 [. I, v) C- }
- if (k < 0) return 0;
7 H8 d& p: D1 ]7 }# t$ ?1 W - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;/ A* q4 b( ]) h; ~
- }. u u7 p9 M, _; @
- run = () => {// 新线程
9 t' H. S3 Y1 S' F5 \. ^ - let id = Thread.currentThread().getId();
2 P# e( ?* v) G9 Z9 L O - print("Thread start:" + id);
& d2 D3 N4 G* N8 g- n) a) C8 \8 ^ - while (state.running) {
3 O* B3 `" U! I- \. H8 E) |6 v - try {
% b6 D! H0 q# ^. L - k += (Date.now() - ti) / 1000 * 0.2;. x4 H9 x( w/ @ i" ^
- ti = Date.now();/ i7 Q% ^( V( ~4 V# y7 H& D) d7 n
- if (k > 1.5) {
, ]8 r' E' _& t' U Q/ ^2 b - k = 0;
- G9 [1 `# C1 y5 r - }: Y( e3 n, n) ?. T% ]& p
- setComp(g, 1);! ^1 U9 i' p* i
- da(g);. R; L0 U" s# G, A
- let kk = smooth(1, k);//平滑切换透明度
! e4 q2 ~( x5 p9 h4 x6 q) d0 m - setComp(g, kk);
7 r O( K2 U' Y8 F - db(g);" d" j. U1 R" y7 p/ Y+ G# V; B7 I
- t.upload();
6 X6 M3 {. A, S8 L - ctx.setDebugInfo("rt" ,Date.now() - ti);
! j5 M4 C5 X5 F( P9 i# ?4 q - ctx.setDebugInfo("k", k);
8 d0 F; X' q9 F+ j9 m" u - ctx.setDebugInfo("sm", kk);2 Y6 Z- o0 r) v- z, w
- rt = Date.now() - ti;
8 `2 z3 S9 H# J% y, f- r - Thread.sleep(ck(rt - 1000 / fps));
; I1 u& r% Z/ v - ctx.setDebugInfo("error", 0)# \) s/ S0 ^# ~2 w. h. M4 }
- } catch (e) {) T- o/ @+ T- N0 {) ~1 v
- ctx.setDebugInfo("error", e);
# T: ~6 Y% ?7 [* v" E/ z4 P3 ] - }
/ U6 L' o$ h' H; @' }. [6 `& F - }
: D9 d4 `* u6 _3 m - print("Thread end:" + id);0 O3 A: ?: K5 }; y/ f- O8 [+ I
- }
0 p/ y3 B5 o* W- D - let th = new Thread(run, "qiehuan");
3 [ G3 @; H8 \* {$ u$ h! Q0 Z - th.start();
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+ Z k. N6 X" T) p: k! q- function render(ctx, state, entity) {
" z% `2 _) O' ~6 q$ Y - state.f.tick();- h8 {" I* O9 B, ?8 ^; ^
- }3 ~; N9 i- s: Q) N. U+ T8 K
- 8 j0 E( {2 C5 s1 U; f. p
- function dispose(ctx, state, entity) {4 [2 |$ J( R* ]$ Y, {
- print("Dispose");* f3 M3 @: M" L4 T6 Z1 [! [* F5 O
- state.running = false;- C) f7 d/ d# G
- state.f.close();
6 ~# `: G; m3 J- c$ {+ ~ - }
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2 N6 L" s2 c7 v1 d: E3 M' Q2 p- function setComp(g, value) {! ?# s, Y) V0 T' q* R& F$ N
- g.setComposite(AlphaComposite.SrcOver.derive(value));
. |9 l; l8 i7 k, _2 ? - }
复制代码 / D3 Y5 f* {' M( }
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。; Y! E. r- |" I
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2 l: e% j6 q. _/ h( M顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)1 F1 X" c+ l" \& P( F* @ L
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