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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。
2 y H/ S$ Z' f4 r, W- importPackage (java.lang);' ~/ |) E! q3 |8 |0 A' m
- importPackage (java.awt);% @) f/ ]2 \$ w8 ?- r# [$ i' v, d
- , U1 M1 f9 u' v% z+ a$ {
- include(Resources.id("mtrsteamloco:library/code/face.js"));; A6 H: ?- n5 S4 O3 j
; l8 M5 j9 P; v$ D3 T9 ~- Q1 J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 h8 v8 D+ ~0 ?6 J! r+ M
- ! e6 ?" U: Y+ @" [
- function getW(str, font) {, I9 x$ r! t( I
- let frc = Resources.getFontRenderContext();/ o( |9 T) I3 y: K3 `. Q; D% b
- bounds = font.getStringBounds(str, frc);
/ U$ W" g! E1 @5 _ Z) T2 T$ m - return Math.ceil(bounds.getWidth());* o( \; p$ T$ p! C' J8 \
- }
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- da = (g) => {//底图绘制
' j! u% y' H0 ?2 B& Y4 L$ H5 ? - g.setColor(Color.BLACK);
, F8 i2 _2 R* S7 ]8 m; t ] - g.fillRect(0, 0, 400, 400);
% z5 ~4 V. K, x* }- O9 G( L" u/ S - }
5 w8 j3 p4 l6 t7 g' ]
( O: O- G4 _4 B, M7 A- db = (g) => {//上层绘制
5 c" a* f$ P+ w5 s2 o& z1 n - g.setColor(Color.WHITE);
, f) [6 C- u' y5 }) w# M% u$ O - g.fillRect(0, 0, 400, 400);3 C k% X7 D0 b0 m; f. T7 p
- g.setColor(Color.RED);" [! z& [& O2 F& J- C! N
- g.setFont(font0);& d$ u$ i4 R' x8 F) x; {, U9 p
- let str = "晴纱是男娘";" W0 ]& l1 y8 v0 K
- let ww = 400;
) H. P+ O6 N4 |0 h; |- P* ] - let w = getW(str, font0);7 H% {- m* o% ~ H8 W) \
- g.drawString(str, ww / 2 - w / 2, 200);
! r7 ?2 h9 R0 P8 C( I" T/ r Q - }
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- const mat = new Matrices();
, D( x9 r& ?6 s, ^7 q - mat.translate(0, 0.5, 0);, L6 ]- S3 \' b! u
2 ^8 c8 w, e" D9 n8 }- function create(ctx, state, entity) {
$ a. { `( y5 R2 T8 K4 ? - let info = {
2 ]- z9 ~( ]& a0 C. Q6 z- B" y - ctx: ctx,0 `4 P3 Y3 z! f. y0 R
- isTrain: false,! } Z9 Z, `" V) J. L' P; x* P$ V$ Y
- matrices: [mat],
6 ?, k5 |3 c& e4 R5 M - texture: [400, 400],9 b6 X4 {0 y6 v% t2 c
- model: {! s& d3 O. X' Z3 e4 T! Y
- renderType: "light",! I7 l( K0 ?* b9 \( N
- size: [1, 1],) P' s- Y2 t9 ~$ x. R
- uvSize: [1, 1]
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- let f = new Face(info);! a( q8 Q0 u9 L: ]
- state.f = f;7 E, q9 k7 |. F4 s/ ]/ k9 P
5 {" u- C% e+ g' D/ A+ v- \- let t = f.texture;
! A' c) M5 z, [9 e& q% ^ - let g = t.graphics;# Y2 [# N6 ~$ t$ }# X$ J
- state.running = true;
% D4 \, d3 H9 U' Z9 k' F* l: E - let fps = 24;9 [8 _# [7 {# [" y" l3 K4 Y
- da(g);//绘制底图8 d$ V# {. Z- L8 P9 t8 N( A3 Q( u" |
- t.upload();2 E1 a/ r; A" y. F) c* T
- let k = 0;
. o# g7 O, r U: |4 k- [# @8 g - let ti = Date.now();
j: }( V9 O" Y/ R/ j6 N& @ - let rt = 0;
& J( R% }! r& j5 f: I$ h0 v - smooth = (k, v) => {// 平滑变化
% J" j4 q& M: u& W' { - if (v > k) return k;3 O7 }* f5 e: R8 C
- if (k < 0) return 0;( {! k1 x" f! e) H
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* [# n4 X% m/ M: o( W/ c3 @/ f
- }
8 ~. k' n0 Q9 I. ?5 i - run = () => {// 新线程1 @* Z* m+ O J3 U% K5 R
- let id = Thread.currentThread().getId();
3 z7 B8 I8 F5 @3 J$ O6 @) J- r - print("Thread start:" + id);
" G4 p" k5 g, G& \/ Y8 } - while (state.running) {0 \7 u4 Z* g3 o
- try {& o, a3 }; G6 k! k* i
- k += (Date.now() - ti) / 1000 * 0.2;
. s2 D2 ] u9 v# x8 E8 M3 }! _ - ti = Date.now();9 v; S0 L! m5 s1 Y
- if (k > 1.5) {
M) ]/ X4 b2 Y. R7 r& J. x - k = 0;
% J6 ^/ ^4 k4 Q+ L' Y6 D - }+ \; @$ L3 G, ^ K/ l% I
- setComp(g, 1);
$ p: I% x- I# [; n. k; s# n - da(g);# y" t% s1 N" N2 t' U
- let kk = smooth(1, k);//平滑切换透明度+ S7 ?6 v6 y4 g5 T$ C w0 [- I j
- setComp(g, kk);/ w2 ~0 v) ~ r& |
- db(g);! e% A9 C. n! G" z
- t.upload();, t3 h0 q2 {2 D! N1 w" j& w
- ctx.setDebugInfo("rt" ,Date.now() - ti);
; j) R% Y% {6 V3 D) N - ctx.setDebugInfo("k", k);
/ e. {& N. Y# _7 }8 p% q! [- c - ctx.setDebugInfo("sm", kk);
' ^. f8 I6 |3 ?3 d - rt = Date.now() - ti;1 z {1 V/ H8 [- {
- Thread.sleep(ck(rt - 1000 / fps));
" p8 v4 r/ t. D6 b+ A" b8 M9 Y - ctx.setDebugInfo("error", 0)* y6 v$ x5 R1 U- M: N
- } catch (e) {: _ v# o" @2 n9 p/ l
- ctx.setDebugInfo("error", e);( L; M c1 B( x: z5 C9 V
- }
8 D+ A' a8 F) |( f - }
/ S% [3 Z5 b, }) K - print("Thread end:" + id);5 e, K8 T: ]8 z
- }
* m" C8 I; K6 y- C4 f - let th = new Thread(run, "qiehuan");, K9 J7 e* x4 X; Z/ C( }' D
- th.start();' Y. o" n' v& e9 g
- }+ j. v e" F# H0 u
' u5 i% `) u) b( k# }: k* H8 F- function render(ctx, state, entity) {
2 q* H4 z- Y, c2 B w7 L - state.f.tick();
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- & i8 l; E, l' l2 L: L2 j) B& Z9 B
- function dispose(ctx, state, entity) {
0 Z) _0 l; i- O0 H7 X1 _8 ] - print("Dispose");
! T9 f4 i; a3 A- ? - state.running = false;
4 P, @) w8 ?$ X5 G5 ], C2 r - state.f.close();. J% O* s1 \0 |) V, D2 k0 {
- }% I0 W; A+ g( z8 z# ~8 a$ R8 j
8 l5 t5 L$ x; j E/ }- function setComp(g, value) {
* d# u% P- D6 P! z# X - g.setComposite(AlphaComposite.SrcOver.derive(value));/ Z- s, n, H% y
- }
复制代码
5 z- ~2 `, J" @6 J! L- V. f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。
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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. z$ [* ?; R4 J% r8 E
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