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3 d5 |4 V! B$ y) c) f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。
* c6 a; s2 O3 s. L- importPackage (java.lang);" ^/ G- B) j [7 V& d0 ?
- importPackage (java.awt);8 f* ^5 ~) ~: B0 M2 t% j1 S3 E
4 C8 x0 q2 \" |8 A- include(Resources.id("mtrsteamloco:library/code/face.js"));1 Y# ~1 l& Q" n5 I+ m
! |( Y. u7 ~6 V; _- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, R7 z. N0 ^4 V" L! q2 d% z
- u$ @1 _0 }8 \: ?$ u
- function getW(str, font) {" t) X4 G5 z9 F3 I! i) z4 S
- let frc = Resources.getFontRenderContext();; m& r% V @, Y* C& D
- bounds = font.getStringBounds(str, frc);
: i, v* ]4 D- y; {4 h - return Math.ceil(bounds.getWidth());' D, n2 u% I7 n. M% {7 U% I4 }
- }8 l5 H/ k6 |4 R4 P
- . i( x- S. ?+ J- D+ V, A! E
- da = (g) => {//底图绘制! ^; ]$ i& e2 s/ E- A/ U0 Y
- g.setColor(Color.BLACK);
0 M2 F6 b. q7 ?$ a) n( x - g.fillRect(0, 0, 400, 400);
1 ]% F @; ^$ W# \ - }
& z: l0 ~7 g- O9 r
' E, p: B0 Y% R F, V) S' w- db = (g) => {//上层绘制- n8 G* U3 r% k3 h9 H' X" ^( ~
- g.setColor(Color.WHITE);
6 T, N) U5 H1 E. u - g.fillRect(0, 0, 400, 400);
1 I1 ~. P7 B* y0 J# Y$ Q - g.setColor(Color.RED);6 N1 S8 H5 F% o2 W! K. A9 F. C
- g.setFont(font0);! U0 f7 D/ Q- Q4 t2 Z+ U1 H
- let str = "晴纱是男娘";# {6 n' o% w" R F9 B
- let ww = 400;
& ]6 d- p- O% O" w1 ^ - let w = getW(str, font0);' E$ \ i, ~. N" V" s
- g.drawString(str, ww / 2 - w / 2, 200);# D. G6 W+ i. X+ p; [& G
- }2 H/ S3 Q- q9 c( [% Q, n) b
1 p, ?2 N& R. [5 X$ \- const mat = new Matrices(); w7 A; @/ u1 G9 k
- mat.translate(0, 0.5, 0);
# c q. w; z0 m! s. `$ \; K
/ C3 T _1 _/ Z2 e- function create(ctx, state, entity) {
a, `$ ^0 f# M2 J5 k6 P% N - let info = {/ F/ C' X: r) s. ^5 E6 e& O+ r
- ctx: ctx,
% }3 i2 S& i( H$ C' ^" H5 O0 T' e - isTrain: false,
% O6 t" S7 \2 y7 Y - matrices: [mat],' L; Z$ R; v) A, C# W5 k- _' l
- texture: [400, 400],! d- ]. T2 ], v4 Y& H- K
- model: {
; \. M! v& a% ^8 M& @1 l* q - renderType: "light",
* u2 d+ @6 y3 U5 G. W' { - size: [1, 1],
H- d7 n7 {% W - uvSize: [1, 1]
. p' P" Z6 C" Z: a: V - }
( i# X) c) T0 |9 y- s - }% r c# f, o$ {2 o1 |: u
- let f = new Face(info);
5 W {0 x) \" B3 e1 ` - state.f = f;4 j6 z" x( S' v0 h* `/ W
+ l7 X. M1 G. z$ K c- let t = f.texture;
6 I1 R9 Z) t E8 x - let g = t.graphics;/ Y1 b ~5 Z6 n
- state.running = true;3 S" r- t" b3 r4 \9 }
- let fps = 24;- [& J" v% N7 {- W; M, e# m
- da(g);//绘制底图
3 t3 L# P; F* K- H$ W6 J- i - t.upload();- p4 D2 @& R, h! S( b2 N: n
- let k = 0;6 ?7 E' Y' T% a7 B
- let ti = Date.now();
( Y; o, A, F# @- L: x8 f3 |. m - let rt = 0;
1 f" [& i9 T/ T/ F - smooth = (k, v) => {// 平滑变化/ ~" z3 a, Y9 ^" s* ^! h% \, j2 ^
- if (v > k) return k;
' m, f8 t5 ~. V `0 Z: U - if (k < 0) return 0;
* e* o( e D: }7 g8 _8 N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 `9 T- S& n. R8 A9 V% q$ T; ^- ?+ E - }
; `1 N3 ~. }" m0 `+ }. z - run = () => {// 新线程
2 N7 K1 b4 a0 Y6 ?1 i; }6 E - let id = Thread.currentThread().getId();
$ k7 m1 U0 _8 A2 O - print("Thread start:" + id);
) c2 S- n3 d- N9 j1 F% [ - while (state.running) {, W- r, B4 N6 u: E
- try {* X ~! \. @9 X; u2 A0 \) m
- k += (Date.now() - ti) / 1000 * 0.2;/ d! T1 J* I2 i/ G4 J
- ti = Date.now();4 M4 L) x& }) _( D4 ?& W N, H
- if (k > 1.5) {
& _5 R6 L8 U% F' o5 ]$ `* _ - k = 0;7 v' X2 x: n$ h4 [
- }- v2 l6 K' U; W2 v" |. ~' _: H
- setComp(g, 1);" p A9 m0 C8 z% S* d G# M |
- da(g);
% y: j8 e' S; `# @9 Y, W% B# M# H - let kk = smooth(1, k);//平滑切换透明度
" N7 x6 F0 X0 W/ i) C; |$ }+ w - setComp(g, kk);
0 {' A' q4 W# p - db(g);; D+ q* o+ l0 j- s* C# B& ~4 s
- t.upload();
% N6 T: A( |2 f, |. t, `. z - ctx.setDebugInfo("rt" ,Date.now() - ti);
: D% C/ \3 J3 w; i' F - ctx.setDebugInfo("k", k);
5 {6 Z8 f2 K/ d4 M$ \3 E - ctx.setDebugInfo("sm", kk);
( L+ j; Q3 [2 }- Z) A" T - rt = Date.now() - ti;
+ n0 G7 {/ ?0 L. ^' c5 B - Thread.sleep(ck(rt - 1000 / fps));
L1 b! P" O# N: x$ Q, w - ctx.setDebugInfo("error", 0)9 {" u C: M, h5 A9 a9 @
- } catch (e) {
8 F4 Q- ]6 Q- L! Q& a - ctx.setDebugInfo("error", e);
; \, g# t& }! B - }
7 f* C- G/ k( _% K6 P8 I3 B2 Z - }
: B( i7 g, @) x+ G% h) D0 y - print("Thread end:" + id);7 a0 w8 z# I! p; k
- }
* m; l: K1 ]% R: S - let th = new Thread(run, "qiehuan");6 q$ T' G# c3 m
- th.start();
- ` R) K& C7 H' o. y# C1 Z" m - }
6 W! X4 O2 T K4 E, y' { O - ; G" B7 Z h$ ~) s, `+ x2 R1 s
- function render(ctx, state, entity) {: t4 d4 O) s0 V$ ~) g
- state.f.tick();% R. l6 t S' f! K& S: {8 M2 Q$ H
- }: b2 T3 T3 A. Y) L0 O1 t
, V! z$ H7 p) U- function dispose(ctx, state, entity) {7 m! L0 j" Q& g) m
- print("Dispose");7 d' y9 A) d6 j2 z* W% X
- state.running = false;& z, S/ M& {* w# y$ p
- state.f.close();% g# r$ P$ @, I$ P6 B
- }
* x' b ~; K# n; D, l
% l, `& p. C8 c5 f. S8 D O1 n- function setComp(g, value) {
7 V) \& R: J ]+ d' I - g.setComposite(AlphaComposite.SrcOver.derive(value));& w( O& ]! m6 {- d! i
- }
复制代码 8 H+ `1 U' {. {# y' {
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$ b9 V' K3 r6 u: C4 h3 ^$ _# E* T, o
1 C+ m! J- m. R顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下); G j/ C4 h8 M$ [& b2 g
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