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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。
8 b. E, q7 \% j0 q4 v- importPackage (java.lang);) B, _0 g _9 [3 q
- importPackage (java.awt);
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! h! S' I- O, @" P) U1 z1 ]5 z- include(Resources.id("mtrsteamloco:library/code/face.js"));; J, H- y: @& P( L- b
( A# J! Z! q- d: S# |. F; N3 q6 U- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {9 O4 b) A1 F0 T1 C/ C) @3 `' [' U
- let frc = Resources.getFontRenderContext();/ x& G1 p$ ^) M
- bounds = font.getStringBounds(str, frc);
7 |) J: N9 Q z) f4 w* w - return Math.ceil(bounds.getWidth());
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4 y/ L4 l1 v) E% z- da = (g) => {//底图绘制8 m% q0 ?8 h0 p: g
- g.setColor(Color.BLACK);! `! ?$ I8 j5 y+ c$ Q( ^
- g.fillRect(0, 0, 400, 400);/ I# G i- d4 Z3 N. e. _1 A; i
- }/ b5 a3 V) K- ?8 S- \
Z' j0 v }* d+ C8 `9 R; t- db = (g) => {//上层绘制, l5 X H3 m7 Z9 U7 G, q& a9 J( P
- g.setColor(Color.WHITE);+ D1 v/ W0 d# p3 s
- g.fillRect(0, 0, 400, 400);3 G# P$ q7 L, M; t
- g.setColor(Color.RED);5 S5 _% W% E& {
- g.setFont(font0);8 J0 b9 Z0 q, r9 l" d5 q
- let str = "晴纱是男娘";
5 ]* w X8 \4 N9 J - let ww = 400;" O% K; k o, ~& n" J7 W' Q9 c
- let w = getW(str, font0);
; s# E2 B9 }/ ?) x2 K6 G& K - g.drawString(str, ww / 2 - w / 2, 200);
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! {9 }; f8 M# D, [- const mat = new Matrices();
% T9 S& O8 P/ ~9 S- I6 ~3 C - mat.translate(0, 0.5, 0);) f7 Q4 d4 G) s% c8 c
4 R! ]2 a. t2 W/ F2 G- `* W- function create(ctx, state, entity) {
. u0 H5 J) B3 t - let info = {5 e2 }6 K; X0 }( m9 H* L
- ctx: ctx,
! K0 ~5 k. u) l& b" _# S7 G/ q - isTrain: false,
0 }( F9 C0 W9 k+ l3 ^ - matrices: [mat],' S* I. O+ C1 m9 u) R
- texture: [400, 400],7 d* p5 ]2 \% {. Y% ]! k
- model: {
5 b, F' T2 P3 a' I - renderType: "light",9 a. M: P) ^8 s. ^
- size: [1, 1],
! F5 m: u n$ g. w8 n, v - uvSize: [1, 1]
8 a8 N4 U6 a3 [) R - }
2 T5 M1 ^1 t g' b* J - }
% I1 I6 }! o+ n$ @ - let f = new Face(info);" R& k3 k- i' `: w4 I
- state.f = f;
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- let t = f.texture;
: Z: Y7 e7 e* U, h - let g = t.graphics;
, B% ^9 G; y# n. _ - state.running = true;) l$ N2 g2 f/ c! T7 K9 k6 b( e
- let fps = 24;& \- V; V9 i& x4 F
- da(g);//绘制底图* }2 n5 ~# [% Y3 |, Y! g
- t.upload();7 A0 |7 _1 | M7 \3 v* l% j6 b8 i
- let k = 0;
2 O$ d. F4 \1 T2 @! j+ Y, B - let ti = Date.now();; V7 v. D0 `# c
- let rt = 0;
8 ?' E" W; n4 o; z - smooth = (k, v) => {// 平滑变化; H$ g, m' v" k7 D& b
- if (v > k) return k;, N, t$ k( z5 k2 Q
- if (k < 0) return 0; I/ M3 F* d6 v3 j! f
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 U4 n5 S* F( T9 s" l5 i# L) ~9 j
- }+ s, \& V+ d' R) {# M4 e1 n) i
- run = () => {// 新线程
) w+ j* V5 \* H# } - let id = Thread.currentThread().getId();
$ }! ]3 S) T- Z& ? - print("Thread start:" + id);
- O$ j3 k, u9 r+ |6 f o - while (state.running) {
$ W# u# {! ~5 d/ ]4 d5 U - try {7 l2 M. U" }9 ^
- k += (Date.now() - ti) / 1000 * 0.2;
% n! X+ \9 ~ {) O - ti = Date.now();
& k4 c& H2 Y, g9 C8 v, M2 K1 h# L - if (k > 1.5) {. ] @; `/ ?) n4 {7 B( o
- k = 0;
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- setComp(g, 1);6 N1 h7 Z5 R9 ~" J$ P
- da(g);
" j- g y% ^% P0 D - let kk = smooth(1, k);//平滑切换透明度! O- `7 f3 t j Y1 }' a( A8 ^
- setComp(g, kk);8 r B1 ~4 ?$ R2 { _1 \3 k' ]7 z
- db(g);
; ~4 d1 @2 D7 \ - t.upload();+ i, ]) q) x$ I _% K! A0 c
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 I) @/ T/ F$ t/ k+ r
- ctx.setDebugInfo("k", k);: C# D/ w8 Y0 ?4 g9 f5 C
- ctx.setDebugInfo("sm", kk);# S4 v# R' L3 U- B9 _( A+ F
- rt = Date.now() - ti;" r) x! @& m/ u$ i, W3 A! @9 d
- Thread.sleep(ck(rt - 1000 / fps));" q1 v7 F$ j0 F8 V6 H
- ctx.setDebugInfo("error", 0)! B$ l4 S7 e/ t6 s& }# d
- } catch (e) {
. t0 D8 [1 T' ^+ w. q9 L- F - ctx.setDebugInfo("error", e);
) Z }8 }$ v0 B) W - }
- z' H+ ?: a* t! X3 c8 ~: S2 i - }
# F% {) Q9 t3 {* n6 }# Y7 e - print("Thread end:" + id);4 Z I. O; N4 I$ V& |& e X
- }
5 U- ]3 v% C. |! s - let th = new Thread(run, "qiehuan");
2 i+ z! ~3 U6 G; | - th.start();/ O( e/ a' O5 ?" D* R* X
- }4 i$ `: C* I e. N/ O* |
- 3 }' D x! }6 `% F O
- function render(ctx, state, entity) {% Q0 e0 n; c$ e
- state.f.tick();) x: C7 Z! t1 A2 e1 M) p9 b
- }# h& q) x5 b' Q- l4 N; S
( G1 N t8 p% u9 X: A+ \, w- function dispose(ctx, state, entity) {
+ O( V6 H1 V+ R5 U9 }. p+ T7 g. a - print("Dispose");
- F' B% r2 A. K2 X - state.running = false;# t/ `1 x- N& @/ r: W* S( v+ d0 x
- state.f.close();
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- , m9 C# W: s" \# s( \7 M0 I; G
- function setComp(g, value) {
R$ G1 _; Q! z5 D% |& D - g.setComposite(AlphaComposite.SrcOver.derive(value));
: L( \) N; W* A - }
复制代码 ( \/ [ V! Z5 z
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。+ v; v; M {( N/ b
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( ^ R: I9 T! D- b1 O j8 U& {% Q _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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