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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。, t# Q/ }+ M7 e3 N6 y
- importPackage (java.lang);
* i+ N3 i+ l9 g/ R0 g9 J - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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. G0 a3 z J" O+ g3 p- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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: T. j9 |6 t/ \; G2 w& e' J8 g- function getW(str, font) {/ ]. v7 M, }# Q; t. _
- let frc = Resources.getFontRenderContext();
( q) e- B9 Y3 X5 r( c - bounds = font.getStringBounds(str, frc);
" `) F9 K) l0 ]6 L) L% X& q - return Math.ceil(bounds.getWidth());
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- ( v8 R3 y9 a) a2 l1 ]% r
- da = (g) => {//底图绘制
2 Y9 q/ M% `6 k - g.setColor(Color.BLACK);# q. p0 K/ _8 P& x7 W7 D" x
- g.fillRect(0, 0, 400, 400);. c. P+ B9 u" n* J# g
- }
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! J0 t5 k& e# S {. n' q- db = (g) => {//上层绘制3 w* C0 t$ W9 T
- g.setColor(Color.WHITE);3 x1 N$ B& s$ e9 K
- g.fillRect(0, 0, 400, 400);
1 Z' m# C( e- ` D3 R- a - g.setColor(Color.RED);
8 H I m; E6 z6 q - g.setFont(font0);
9 |% @$ J% L4 G! e& P! P" } - let str = "晴纱是男娘";2 _9 _% t+ z0 ~0 I# G! @. W$ j( A
- let ww = 400;5 p- [/ F' J) U x7 b0 S5 b+ b O" y
- let w = getW(str, font0);' b& c4 M/ C2 L- I5 e( Z
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();; ]- q3 p. e9 t! |" `1 }+ e
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {) g2 F: c6 q" Z0 b
- let info = { Y, ]0 j+ @, ]' c
- ctx: ctx,: n3 b( o( o# `$ j
- isTrain: false,
; V) L- t* Q2 j. a - matrices: [mat],
_3 v8 x' y! k: B' u - texture: [400, 400],
6 o% m4 E U B6 l+ | - model: {
! t2 ~! P1 E* q - renderType: "light",
. V' f' x8 _" \( Z1 X3 n$ d; j - size: [1, 1],% U8 `; d' L9 a2 r# l; ^( T
- uvSize: [1, 1]
( x! [) f E" {# H - }
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- let f = new Face(info);
) z' \2 j, Z0 Y+ ^ - state.f = f;
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; S. H. z9 r3 Q+ ?; f- let t = f.texture;! H7 ~- D$ w5 r. i
- let g = t.graphics;
: x% c0 o* B" p1 E - state.running = true;
1 l1 Q, c; x: b( @, r# v! g. k: d - let fps = 24;
% i) ]: b' }/ M4 g8 t F2 Q F - da(g);//绘制底图
8 S, H9 a! [* v8 @+ D$ H* @ - t.upload();! |6 z# i8 n( B+ q6 N/ D; X
- let k = 0;0 N: P/ a6 w$ R- B3 g% [' t0 U4 K
- let ti = Date.now();
2 ?) }& ~9 Z8 @- h) Q% B - let rt = 0;
& B% G" k" i# i) |8 L/ O* h - smooth = (k, v) => {// 平滑变化2 u( f2 J' j* B% k5 G& i8 U* R
- if (v > k) return k;4 q- b) o L. A" `) d1 d e2 j& S
- if (k < 0) return 0;/ |& y& o# \1 A0 y4 c
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;4 c2 H( R0 |2 L# M# j
- }
$ G( s0 A* q9 W8 v' O - run = () => {// 新线程- V" o, y. ~$ s4 u' _5 Q: E
- let id = Thread.currentThread().getId(); e2 T' H6 H+ d7 c; ^6 o0 `/ ^" e
- print("Thread start:" + id);
+ y: \; m) {. c& _. \* y% t - while (state.running) {
+ G0 q5 i& P3 f, @ - try {' n* {) c% o" J8 M% ]
- k += (Date.now() - ti) / 1000 * 0.2;7 `( ^$ w/ M' P
- ti = Date.now();
4 ^ ^, |/ d: R - if (k > 1.5) {
/ y, M3 l2 g0 c. G; T0 R - k = 0;* X% J7 W# M% y8 I
- }! I8 N, t/ c, t0 ^9 C1 e
- setComp(g, 1);. a% ~5 }# Z7 N# Q! z
- da(g);
' ?5 B; [) X+ @( ?& h - let kk = smooth(1, k);//平滑切换透明度& V; c# D3 A! g: [ o2 i$ b2 {
- setComp(g, kk);* p, u( u- E( Y# P
- db(g);, C, \, m7 z w+ N9 C
- t.upload();
+ R4 m1 u) F5 @# j - ctx.setDebugInfo("rt" ,Date.now() - ti);! d! U# y" |, U
- ctx.setDebugInfo("k", k);
8 n# ?- B1 W! V$ I/ o) w - ctx.setDebugInfo("sm", kk);
. ~$ A7 ?4 ~# H) G# o8 t+ D3 y - rt = Date.now() - ti;0 Z' X3 ` y* a; Q! c% d
- Thread.sleep(ck(rt - 1000 / fps));
1 g% z7 M* F0 B# G; C - ctx.setDebugInfo("error", 0)
& c* U; I0 i# U9 c+ c! \ - } catch (e) {
: b9 X. w$ r1 R5 H% e; ^1 v - ctx.setDebugInfo("error", e);
; ~, F7 P) w, N; M8 a5 X& z - }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
7 W" w t! V) Y% y$ d$ b& ] - th.start();, O' }& o9 X! ^( O6 `2 R
- }- l: P" R2 V& v
+ m% ^7 K7 k0 ?8 ~ K# i r% D! @+ r$ g- d- function render(ctx, state, entity) {
/ z) X4 l5 r4 i6 u - state.f.tick();
* B1 W& H( x! d" |, O1 D+ w/ } - }3 g! [ y' m6 v; E1 |
' q- q' J2 Y8 N- function dispose(ctx, state, entity) {* ]' X. \; D: P: x; x2 g5 f6 T( }
- print("Dispose");
; \# ?/ Y" \% F1 g _& B - state.running = false;# S1 B5 X2 a5 w6 H+ A6 R$ P
- state.f.close();
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7 r' n- U& ~8 n( i1 H7 _% o- function setComp(g, value) {
$ B7 o. J& v+ X5 ` - g.setComposite(AlphaComposite.SrcOver.derive(value)); v9 I+ x: ?1 p" q6 H" t" z0 g
- }
复制代码 " H" w* e8 ?) @6 w
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。3 i" e% r0 M) \$ G5 s, U
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6 n- N* C* s% @; d5 f3 Z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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