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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。+ R2 a. u' `8 M- H u* j" `9 ?
- importPackage (java.lang);
, L3 S! L0 @0 U# Q G* S8 K - importPackage (java.awt);4 u% a3 R- n3 j: @7 y/ a& d; |
- . [9 K' O* w9 } M* L
- include(Resources.id("mtrsteamloco:library/code/face.js"));- Y& W* h H. l `( n
0 Q# c' n. D a& T) O; H- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
4 V) Y( V1 N2 r' z6 Q+ j - let frc = Resources.getFontRenderContext();3 q. [" i) C. R2 z9 k/ \+ F' A
- bounds = font.getStringBounds(str, frc);
# z- Z/ |* o' y& `9 g( K - return Math.ceil(bounds.getWidth());
* X8 e6 H( K2 h4 h4 Z6 J - }
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- da = (g) => {//底图绘制& B p2 X* t2 q% Z
- g.setColor(Color.BLACK);
& p; c- S; s4 I7 l - g.fillRect(0, 0, 400, 400);
8 l& Q' Q' Y$ _: Z. R' S - }
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- db = (g) => {//上层绘制% q. n5 K1 w5 }- O d! S4 T
- g.setColor(Color.WHITE);- Y7 `; H1 _! g" N; o9 i" y ?' i
- g.fillRect(0, 0, 400, 400);! U: S- @& w9 f
- g.setColor(Color.RED);
# p1 Z' K$ O0 \! L( V9 _ - g.setFont(font0);; X4 F3 Y' n) |& l e. F6 [
- let str = "晴纱是男娘";. c% m o% m) m' S
- let ww = 400;
3 `) p& Q6 U! e! B5 p, b - let w = getW(str, font0);# E' M% r, Z/ O1 [
- g.drawString(str, ww / 2 - w / 2, 200);( Q! E' E6 h7 X6 ~6 B- t
- }
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- const mat = new Matrices();' l1 X: ?7 Q. F- ]: Z q, x
- mat.translate(0, 0.5, 0);4 I' l8 C, b* ~
- & D% C2 x9 ?( S7 Y3 ]# }
- function create(ctx, state, entity) {
0 O" c8 L; d; G, ?) _, s - let info = {, O' F" l/ q7 x) G" D/ c
- ctx: ctx,
6 E. g% n: j' v+ j& M" J' N8 c7 |( {1 U7 O1 i - isTrain: false,
! W0 r+ x! z2 I5 O - matrices: [mat],. f$ t, p: S( W$ ?; k, r3 `
- texture: [400, 400],& H( [) l& |) z7 M/ o4 q
- model: {! a+ I+ u; x) h
- renderType: "light",
, ?; }4 H" C' ~- v/ q/ A - size: [1, 1],2 v) e2 {5 Z4 s; M, J! p- S* G
- uvSize: [1, 1]
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- let f = new Face(info);3 f& ~* a5 ^% z- c
- state.f = f;- I# ?: g* @1 E' l3 W& Q1 V- E
- 0 g& v; M8 Z8 c Q1 o
- let t = f.texture;
3 e. k3 y9 p+ X. H - let g = t.graphics;( v1 ?5 n# q! u/ k) V: ]
- state.running = true;
. j+ N8 ]: n4 O4 h - let fps = 24;) t0 O, r; E) \* f# f
- da(g);//绘制底图
I( D4 e# C/ W. c - t.upload();1 X B% D4 i- s b7 N6 G
- let k = 0;
8 J% D' q" n6 O# G - let ti = Date.now();% F* p' C! Y* T5 t; p2 Z/ ?2 n
- let rt = 0;
- T' f! {4 i& Z - smooth = (k, v) => {// 平滑变化' n3 \4 ]: ^4 C; L9 C
- if (v > k) return k;
# a: Z/ s3 I8 ] - if (k < 0) return 0;1 Y. X5 m# F9 S) Z; M3 h$ {7 E# M$ N
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程! k4 h, o% u v- @7 V' z
- let id = Thread.currentThread().getId();: U' \' \' i7 H A6 X- R
- print("Thread start:" + id);
. Y' W0 k. l5 f+ v5 k - while (state.running) {
2 G% G4 i ^% L* {0 U9 S- x6 s - try {" X( d, z( M3 o4 H* k, m3 J3 B" M$ m
- k += (Date.now() - ti) / 1000 * 0.2;9 _5 t' E$ P Q! w+ |
- ti = Date.now();, t, g5 R9 O' o
- if (k > 1.5) {
' @$ c1 v* v+ ^- R: `. ~ - k = 0;
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- setComp(g, 1);) i; J' v8 k0 H) E* O- K$ o8 q
- da(g);
+ }/ \- N$ Z, B6 ?/ t% r - let kk = smooth(1, k);//平滑切换透明度 P. ~) ^8 ] Q2 Z
- setComp(g, kk);' C7 Y) ^, z. G" Z
- db(g);
e& l/ o* R N" P8 U/ E; h& u - t.upload();
% k: b+ U0 O- y) {* `/ L - ctx.setDebugInfo("rt" ,Date.now() - ti);
: E1 \/ t% D0 }9 v5 P7 c5 [ - ctx.setDebugInfo("k", k);
2 L- v4 A% K% P# l V# I) r - ctx.setDebugInfo("sm", kk);
, o! g/ w# f5 q& W8 v& B3 Z- w, X - rt = Date.now() - ti;
0 m9 o L2 d% E: y: [& f6 b - Thread.sleep(ck(rt - 1000 / fps));
S" Q% M/ w" @) ~, r - ctx.setDebugInfo("error", 0)
: h2 z$ p( Z5 {: K& u6 t - } catch (e) {
/ V% Z1 d, _$ F# X4 j. ~4 C/ Y - ctx.setDebugInfo("error", e);# c2 V1 E- R* }& W$ o
- }
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- print("Thread end:" + id);0 o" E+ F0 Y& W2 s
- }
5 p" t9 O+ ^/ X L - let th = new Thread(run, "qiehuan");
. y2 c' A' f+ A' Z - th.start();, `8 u7 t3 b p1 O0 c1 c
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Y6 E$ K7 U4 L; C; y. {7 J7 e- function render(ctx, state, entity) {0 f' j9 X* h" o) }* {) F$ B
- state.f.tick();9 S9 g" M% h& Z# h7 w( Z6 J
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- g( k# u7 J1 c+ i8 P! _, n- function dispose(ctx, state, entity) {$ i! v* R& `# q7 ~* P) W% v. P
- print("Dispose");- P* W/ q- t) ?
- state.running = false;; [9 H+ S' o1 B7 _( ?
- state.f.close();
9 a: d% a4 y; I - }
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- function setComp(g, value) {# e$ ]3 n! b" Z: o* x4 G8 M
- g.setComposite(AlphaComposite.SrcOver.derive(value));
% k: g! V4 g$ M. s M - }
复制代码 7 y9 M" h- D9 A6 g5 d5 g
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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4 |; b' A. W' O* E+ a- d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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