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+ X/ Z% E8 K9 n* v4 u, O7 A) C" e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。
5 \' G0 }: l4 b6 t- f6 }- importPackage (java.lang);
7 |" V+ ?1 g$ b6 E8 d3 y - importPackage (java.awt);
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1 J$ p# o7 Q) ^' J T4 L. p- include(Resources.id("mtrsteamloco:library/code/face.js"));8 ^/ u) X e8 Q# N; H
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {& d$ Q) x+ s$ {* i: B, j
- let frc = Resources.getFontRenderContext();
3 \+ ~* e8 M7 T i, ~, k - bounds = font.getStringBounds(str, frc);2 i) V' `* `+ O# G
- return Math.ceil(bounds.getWidth());
4 F6 x' t- u* Q% N, A& Q3 g - }
5 q) j/ P( V$ m& o& p - ! |$ W) \. P* X( {$ j
- da = (g) => {//底图绘制
- M" {, F. t% C' j5 _# L - g.setColor(Color.BLACK);$ z' k7 V3 R' N: E" ]
- g.fillRect(0, 0, 400, 400);! z5 \" y) Y2 M U
- }
7 q6 C. S* q- \5 m, w" p - 1 ]. v8 G: Y3 r6 O7 v( ^, j3 u7 c! p
- db = (g) => {//上层绘制# @8 N( Q/ }9 X5 o
- g.setColor(Color.WHITE);
; ?7 a0 ]! z) ? - g.fillRect(0, 0, 400, 400);7 ]4 ], F! |; L, n- M' E& x9 M- N
- g.setColor(Color.RED);
5 v7 W' a7 k& G6 j: l4 Z - g.setFont(font0);, P- M5 C" U- X! k/ x, V6 V, \7 F
- let str = "晴纱是男娘";
/ K9 u, Q) ` Y! o - let ww = 400;
% T4 y$ n- f! K: J( e7 a9 p4 \* t - let w = getW(str, font0);6 f" F# r/ v/ r8 h) S; i1 ~
- g.drawString(str, ww / 2 - w / 2, 200);
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- % ?5 P" n3 e7 V- ]
- const mat = new Matrices();
# m i: ^& U6 _ - mat.translate(0, 0.5, 0);' ~# N( ]$ `: A. E; n8 X! u, Y
( ^5 {+ j) O- |: b+ F4 q- function create(ctx, state, entity) {- H8 o- d, \8 W7 p8 ?/ |
- let info = {& v* x6 }$ M9 T+ p
- ctx: ctx,
4 M' _( _( I# m0 `: {+ i! K& a - isTrain: false,8 g' H& O" Y, F# q( K. n
- matrices: [mat],
& O3 P B1 h5 A' |. i2 g - texture: [400, 400],: J1 n2 H1 o, t$ Q. H8 ^
- model: {
& q. e9 N9 \4 i% A6 B - renderType: "light",
( V1 ]$ ]3 H2 U# [, `; R9 T - size: [1, 1], [8 J4 s6 s; j2 C1 \
- uvSize: [1, 1]$ B5 A6 A/ C' k: K3 E) |) |0 ~0 r" t
- }
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- let f = new Face(info);
0 `: p7 n8 z4 e0 x - state.f = f;6 a# m) r' Z) K/ o: `" G
- 1 [+ N0 Q, M$ p7 P1 i/ I, @, I
- let t = f.texture;
* T/ k: g% G" {4 o& A% I - let g = t.graphics;# c4 L+ E+ K' e9 p& o: U6 W
- state.running = true;
: s' J. `# A/ B - let fps = 24;9 n: V1 d) N- T' ], P+ ]+ b! h# d
- da(g);//绘制底图% ?$ c" p8 O0 P9 o5 X& p
- t.upload();$ w- p8 I$ U3 ~1 h& O& k
- let k = 0;/ \+ ~4 x: k; o& k
- let ti = Date.now();
* ]6 I' s. Q: d% ?+ y, g - let rt = 0;+ \$ z5 g$ ? K
- smooth = (k, v) => {// 平滑变化8 M) \( a, R: U1 Q4 |! a- ?$ V+ n
- if (v > k) return k;
2 J( s) J; e2 |, o - if (k < 0) return 0;/ ^$ g/ W, d ~ h: d' Q( I
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; L( w, S4 ~+ v! F* z, ?
- }* }; }1 D t1 ]% K
- run = () => {// 新线程
. n6 z/ B9 d; o! I: x8 Q - let id = Thread.currentThread().getId();
6 M* a$ r% ?3 [: ~8 Q - print("Thread start:" + id);0 f' d/ ]( v: R( i" z, u$ q# U
- while (state.running) {
# K6 X. D/ t! l& n - try {
- k5 F$ d* ? m5 n" e. c# {/ _ - k += (Date.now() - ti) / 1000 * 0.2;+ O/ l1 I9 `% ]: q+ V& l) r6 O
- ti = Date.now();" ? l2 y8 ~0 ?- ^( q; G6 W3 s
- if (k > 1.5) {2 n! K5 b" G7 l2 Q! {+ _: R$ F5 T
- k = 0;1 H, }: T V+ m4 l6 w0 f/ O
- }8 G' ?5 t$ {" R! \8 R2 Z0 k: }2 V2 b1 g
- setComp(g, 1);
# S# J# Q- D; Y" H, d - da(g);
( W7 d* e" P/ n. }8 x - let kk = smooth(1, k);//平滑切换透明度9 E6 x% ` F+ _% S5 I6 Q, x% y
- setComp(g, kk);
, v. I+ p& c6 f0 f - db(g);9 U& U6 Y8 {$ |$ L' v" `
- t.upload();. y2 ] y) `: P! b$ \3 [1 K0 d
- ctx.setDebugInfo("rt" ,Date.now() - ti);
# d4 B1 F8 y! M$ Q I7 f - ctx.setDebugInfo("k", k);( ^. }4 h9 v- F6 U9 u
- ctx.setDebugInfo("sm", kk);
& y# |, @- ]8 a0 { - rt = Date.now() - ti;
: l7 B: R1 t9 K$ t& W' y - Thread.sleep(ck(rt - 1000 / fps));
- W- ^: Q: N2 I% K" D - ctx.setDebugInfo("error", 0)
; q0 i: y ~+ c+ a& p" f - } catch (e) {
; L% O4 q& p: j5 c, \2 D. B - ctx.setDebugInfo("error", e);
5 [! m% r: A4 w5 A* X( [ - }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");! g8 @( s, G- Y
- th.start();
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- & S! r) G8 w( X6 A# ]
- function render(ctx, state, entity) {
# ?- ~+ ]& I7 m ~8 P/ Z - state.f.tick();
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/ n! j% V' [; ?2 c, e# O+ U- function dispose(ctx, state, entity) {3 O3 n0 M; C9 |) \* t1 H
- print("Dispose");5 r. h. H1 h& G, Q! R4 F$ _
- state.running = false;( h! x& H) i+ @
- state.f.close();
! { N- O3 p1 x$ U2 G* ~7 F) o3 v - } o" E0 F$ C' a
# x) y4 B# W6 a$ p- m- function setComp(g, value) {
0 s6 @& `. K; K& N/ D/ y - g.setComposite(AlphaComposite.SrcOver.derive(value));/ O+ I1 X/ [6 t
- }
复制代码 * a8 y5 O* p6 V5 E! w# v. Y" V
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) X( g3 n0 [& O* L5 M
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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)
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