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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 H) V5 `+ _3 _+ F4 }5 v* [ t
- importPackage (java.lang);
) X3 \9 K, m6 t6 C2 D - importPackage (java.awt); E7 @2 t6 z( D/ z- Y
( \6 v8 t% u9 Q9 ]$ [. S# k- include(Resources.id("mtrsteamloco:library/code/face.js"));
* `/ ~) v4 ~! v+ k* o - # Q0 j8 l9 k) A+ R# Z1 C8 ]9 }
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
, x1 t; r% W. {( z. V: R - , B: b. y5 y% ^" }
- function getW(str, font) {+ N( n7 M/ z1 I' m: i
- let frc = Resources.getFontRenderContext();3 g" _; V7 W8 D
- bounds = font.getStringBounds(str, frc);
5 @8 m& ]2 Q; ^6 k# q. [ - return Math.ceil(bounds.getWidth());
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, w* p/ o/ |. s+ P3 T$ I- da = (g) => {//底图绘制) v* X- L% y; j3 \1 h7 Z5 ~- M, F9 i
- g.setColor(Color.BLACK);, a9 T' `7 J5 U, Y: w9 Z) E
- g.fillRect(0, 0, 400, 400);- j# I, }% ]' G3 O/ S. A5 m
- }
+ b/ z2 ]/ C1 t* A; v! z# S - 6 \2 l9 S" s ~4 R
- db = (g) => {//上层绘制& @0 J& b4 K* m) ]8 q
- g.setColor(Color.WHITE);' v) U1 j. I; g; J
- g.fillRect(0, 0, 400, 400);
% `* h2 {) v1 \0 T: O- J0 a! ` - g.setColor(Color.RED);7 ~. W4 T# l% r; _% H; a
- g.setFont(font0);' [9 T; P2 [. p. N8 M6 Q* r1 Q
- let str = "晴纱是男娘";1 }3 `0 K C8 n
- let ww = 400;
/ l0 r- P# A$ X - let w = getW(str, font0);: H3 ~- y$ a8 C
- g.drawString(str, ww / 2 - w / 2, 200);. i- a7 t3 |3 @ y% z7 g; s& K- ?* T
- }
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- const mat = new Matrices();4 @! I* O1 G i5 }
- mat.translate(0, 0.5, 0);
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2 ^/ w, G, i& K7 B; l- function create(ctx, state, entity) {6 e; p2 s9 j! S$ M) C- s
- let info = {
! J6 \$ F6 x- V% A: E2 z6 a1 o; d - ctx: ctx,
( {) }0 q" ^# X - isTrain: false,$ b' D. L, S2 p2 }
- matrices: [mat],. `1 {0 U& l& r2 R& a0 w$ u
- texture: [400, 400],
P1 F& Y4 H9 E ~& m - model: {
! `, s1 ^4 U$ q - renderType: "light",4 E# n- y8 n7 Y0 C V5 j/ m
- size: [1, 1],1 b+ F$ X: e% l; e ~
- uvSize: [1, 1]
m5 w' L3 x) D9 c - }
7 B2 r7 p; d; ~2 A& o T9 y - }
0 ?) f) `! r' U6 v' R* W& K9 t - let f = new Face(info);0 a' w- C3 u$ A: r7 B% L3 u
- state.f = f;& K4 H' b9 N/ R8 K4 ~, |1 k
: V7 ~. y! J% Y% L* K- let t = f.texture;
+ @7 `/ q. g; n8 y - let g = t.graphics;
5 V6 ~! j: t! x) S7 P$ a$ s - state.running = true;6 S. Y1 C' r# ~" Y
- let fps = 24;0 q" h+ O) c) G# B
- da(g);//绘制底图
% ^, _5 C- d$ k - t.upload();0 F0 [) x9 Y. E0 n! C/ v
- let k = 0;( o* m* @. P b1 m2 i
- let ti = Date.now();
9 k6 o5 d6 |" g$ P$ e4 k! O+ s* M& ^- j - let rt = 0;
) K2 E9 w) q. l1 g( W0 X/ F - smooth = (k, v) => {// 平滑变化- L p. @; H8 i$ g7 n
- if (v > k) return k;7 c2 `1 U7 b* B6 _
- if (k < 0) return 0;
* u1 P, R- L$ M# ~% N. {6 r8 N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 L7 r; x+ A" z. B
- }# i9 Q, O" c7 n: [9 l( P. D
- run = () => {// 新线程
/ H) O) e% p+ x& V N - let id = Thread.currentThread().getId();1 e- o# x" h5 q
- print("Thread start:" + id);
* p/ O2 `+ z; \1 p/ l( B - while (state.running) { p: o6 l3 L3 K
- try { S; O# Q, v0 W9 G5 B( m! p5 {3 q; j
- k += (Date.now() - ti) / 1000 * 0.2;/ I* G: m v! H$ M: M
- ti = Date.now();' I1 f7 m$ U7 \/ x
- if (k > 1.5) {2 H1 L4 V3 x2 f6 P- b
- k = 0;
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- setComp(g, 1);) g$ e0 ]+ y& P( l. E2 N
- da(g);6 H6 U" x$ n5 O
- let kk = smooth(1, k);//平滑切换透明度
* a/ C, G: V" K* m _9 n - setComp(g, kk); m- S' A* W0 c& K+ R
- db(g);) q- H7 ]" Z! b3 _
- t.upload();* Z; V& f! m4 m. u
- ctx.setDebugInfo("rt" ,Date.now() - ti);
1 O3 ^0 p8 ^7 q - ctx.setDebugInfo("k", k);
! Q8 @6 Y5 W2 i5 h/ T$ t3 W& J ~ - ctx.setDebugInfo("sm", kk);* ]/ J- f& ?# r/ \- J5 \ a
- rt = Date.now() - ti;4 _6 D/ j5 a& n
- Thread.sleep(ck(rt - 1000 / fps));
% X0 |! R r; D3 i6 V3 d; L - ctx.setDebugInfo("error", 0)5 h9 M' E( t7 z0 x/ r7 F
- } catch (e) {
" C8 L: h2 @& L, j$ A; ~ - ctx.setDebugInfo("error", e);+ R# V9 S) ~! D. c4 e
- }6 t+ W5 J; ]8 b, Y
- }8 h! R) [& _# |3 A- N8 T
- print("Thread end:" + id);, y- G. [. `) ~1 t3 Y( N5 V9 e
- }
, Y8 s. ^8 f: Z - let th = new Thread(run, "qiehuan");
2 V$ R' E2 x- T- | - th.start();8 j( `) C* P1 x! G4 ?. j# d
- }# R# v+ r! D$ B" u) ^
" Q; z/ j7 _* J7 a. _- function render(ctx, state, entity) {7 d1 c- t% |- ?
- state.f.tick();
% r' M7 i& {' N- ]3 ]5 i' U - }
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- function dispose(ctx, state, entity) {
) c: C7 Q K1 G1 a - print("Dispose");
; U% ~% P' L$ m5 p! G# X! L9 ?2 ^6 d - state.running = false;
) p. J9 `- s# w1 z8 N& Q4 } - state.f.close();; f" [' w4 v, r& M. V
- }* T2 J O( G( S, ]/ F5 c
) A! t5 i6 v- P$ f5 x, O- function setComp(g, value) {
- r1 U' x L" [5 w- H8 a, @" a3 d - g.setComposite(AlphaComposite.SrcOver.derive(value));
$ Y; w& O m } d, P9 ` - }
复制代码 4 l! g/ @- H K- {; m8 ~: 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。
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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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